[refactor] replace int with httpStatusCodes (#15282)

* replace "200" (int) with "http.StatusOK" (const)

* ctx.Error & ctx.HTML

* ctx.JSON Part1

* ctx.JSON Part2

* ctx.JSON Part3

64 files changed, 504 insertions, 441 deletions

diff --git a/modules/context/api.go b/modules/context/api.go
index 4757c2eeb4..cbd90c50e4 100644
--- a/modules/context/api.go
+++ b/modules/context/api.go
@@ -203,12 +203,12 @@ func (ctx *APIContext) CheckForOTP() {
 		if models.IsErrTwoFactorNotEnrolled(err) {
 			return // No 2FA enrollment for this user
 		}
-		ctx.Context.Error(500)
+		ctx.Context.Error(http.StatusInternalServerError)
 		return
 	}
 	ok, err := twofa.ValidateTOTP(otpHeader)
 	if err != nil {
-		ctx.Context.Error(500)
+		ctx.Context.Error(http.StatusInternalServerError)
 		return
 	}
 	if !ok {
@@ -288,7 +288,7 @@ func ReferencesGitRepo(allowEmpty bool) func(http.Handler) http.Handler {
 				repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
 				gitRepo, err := git.OpenRepository(repoPath)
 				if err != nil {
-					ctx.Error(500, "RepoRef Invalid repo "+repoPath, err)
+					ctx.Error(http.StatusInternalServerError, "RepoRef Invalid repo "+repoPath, err)
 					return
 				}
 				ctx.Repo.GitRepo = gitRepo
@@ -324,7 +324,7 @@ func (ctx *APIContext) NotFound(objs ...interface{}) {
 		}
 	}
 
-	ctx.JSON(404, map[string]interface{}{
+	ctx.JSON(http.StatusNotFound, map[string]interface{}{
 		"message":           message,
 		"documentation_url": setting.API.SwaggerURL,
 		"errors":            errors,
diff --git a/modules/context/auth.go b/modules/context/auth.go
index 3b4d7fc595..ed220d5420 100644
--- a/modules/context/auth.go
+++ b/modules/context/auth.go
@@ -6,6 +6,8 @@
 package context
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -27,13 +29,13 @@ func Toggle(options *ToggleOptions) func(ctx *Context) {
 		if ctx.IsSigned {
 			if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
 				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.HTML(200, "user/auth/activate")
+				ctx.HTML(http.StatusOK, "user/auth/activate")
 				return
 			}
 			if !ctx.User.IsActive || ctx.User.ProhibitLogin {
 				log.Info("Failed authentication attempt for %s from %s", ctx.User.Name, ctx.RemoteAddr())
 				ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-				ctx.HTML(200, "user/auth/prohibit_login")
+				ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
 				return
 			}
 
@@ -76,7 +78,7 @@ func Toggle(options *ToggleOptions) func(ctx *Context) {
 				return
 			} else if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
 				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.HTML(200, "user/auth/activate")
+				ctx.HTML(http.StatusOK, "user/auth/activate")
 				return
 			}
 		}
@@ -93,7 +95,7 @@ func Toggle(options *ToggleOptions) func(ctx *Context) {
 
 		if options.AdminRequired {
 			if !ctx.User.IsAdmin {
-				ctx.Error(403)
+				ctx.Error(http.StatusForbidden)
 				return
 			}
 			ctx.Data["PageIsAdmin"] = true
@@ -108,7 +110,7 @@ func ToggleAPI(options *ToggleOptions) func(ctx *APIContext) {
 		if ctx.IsSigned {
 			if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
 				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.JSON(403, map[string]string{
+				ctx.JSON(http.StatusForbidden, map[string]string{
 					"message": "This account is not activated.",
 				})
 				return
@@ -116,14 +118,14 @@ func ToggleAPI(options *ToggleOptions) func(ctx *APIContext) {
 			if !ctx.User.IsActive || ctx.User.ProhibitLogin {
 				log.Info("Failed authentication attempt for %s from %s", ctx.User.Name, ctx.RemoteAddr())
 				ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-				ctx.JSON(403, map[string]string{
+				ctx.JSON(http.StatusForbidden, map[string]string{
 					"message": "This account is prohibited from signing in, please contact your site administrator.",
 				})
 				return
 			}
 
 			if ctx.User.MustChangePassword {
-				ctx.JSON(403, map[string]string{
+				ctx.JSON(http.StatusForbidden, map[string]string{
 					"message": "You must change your password. Change it at: " + setting.AppURL + "/user/change_password",
 				})
 				return
@@ -139,13 +141,13 @@ func ToggleAPI(options *ToggleOptions) func(ctx *APIContext) {
 		if options.SignInRequired {
 			if !ctx.IsSigned {
 				// Restrict API calls with error message.
-				ctx.JSON(403, map[string]string{
+				ctx.JSON(http.StatusForbidden, map[string]string{
 					"message": "Only signed in user is allowed to call APIs.",
 				})
 				return
 			} else if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
 				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.HTML(200, "user/auth/activate")
+				ctx.HTML(http.StatusOK, "user/auth/activate")
 				return
 			}
 			if ctx.IsSigned && ctx.IsBasicAuth {
@@ -164,7 +166,7 @@ func ToggleAPI(options *ToggleOptions) func(ctx *APIContext) {
 					return
 				}
 				if !ok {
-					ctx.JSON(403, map[string]string{
+					ctx.JSON(http.StatusForbidden, map[string]string{
 						"message": "Only signed in user is allowed to call APIs.",
 					})
 					return
@@ -174,7 +176,7 @@ func ToggleAPI(options *ToggleOptions) func(ctx *APIContext) {
 
 		if options.AdminRequired {
 			if !ctx.User.IsAdmin {
-				ctx.JSON(403, map[string]string{
+				ctx.JSON(http.StatusForbidden, map[string]string{
 					"message": "You have no permission to request for this.",
 				})
 				return
diff --git a/modules/context/context.go b/modules/context/context.go
index a784032606..b876487d5e 100644
--- a/modules/context/context.go
+++ b/modules/context/context.go
@@ -213,7 +213,7 @@ func (ctx *Context) RenderWithErr(msg string, tpl base.TplName, form interface{}
 	}
 	ctx.Flash.ErrorMsg = msg
 	ctx.Data["Flash"] = ctx.Flash
-	ctx.HTML(200, tpl)
+	ctx.HTML(http.StatusOK, tpl)
 }
 
 // NotFound displays a 404 (Not Found) page and prints the given error, if any.
diff --git a/modules/lfs/locks.go b/modules/lfs/locks.go
index f2688c3260..eaa8305cb4 100644
--- a/modules/lfs/locks.go
+++ b/modules/lfs/locks.go
@@ -5,6 +5,7 @@
 package lfs
 
 import (
+	"net/http"
 	"strconv"
 	"strings"
 
@@ -21,19 +22,19 @@ import (
 func checkIsValidRequest(ctx *context.Context) bool {
 	if !setting.LFS.StartServer {
 		log.Debug("Attempt to access LFS server but LFS server is disabled")
-		writeStatus(ctx, 404)
+		writeStatus(ctx, http.StatusNotFound)
 		return false
 	}
 	if !MetaMatcher(ctx.Req) {
 		log.Info("Attempt access LOCKs without accepting the correct media type: %s", metaMediaType)
-		writeStatus(ctx, 400)
+		writeStatus(ctx, http.StatusBadRequest)
 		return false
 	}
 	if !ctx.IsSigned {
 		user, _, _, err := parseToken(ctx.Req.Header.Get("Authorization"))
 		if err != nil {
 			ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-			writeStatus(ctx, 401)
+			writeStatus(ctx, http.StatusUnauthorized)
 			return false
 		}
 		ctx.User = user
@@ -44,23 +45,23 @@ func checkIsValidRequest(ctx *context.Context) bool {
 func handleLockListOut(ctx *context.Context, repo *models.Repository, lock *models.LFSLock, err error) {
 	if err != nil {
 		if models.IsErrLFSLockNotExist(err) {
-			ctx.JSON(200, api.LFSLockList{
+			ctx.JSON(http.StatusOK, api.LFSLockList{
 				Locks: []*api.LFSLock{},
 			})
 			return
 		}
-		ctx.JSON(500, api.LFSLockError{
+		ctx.JSON(http.StatusInternalServerError, api.LFSLockError{
 			Message: "unable to list locks : Internal Server Error",
 		})
 		return
 	}
 	if repo.ID != lock.RepoID {
-		ctx.JSON(200, api.LFSLockList{
+		ctx.JSON(http.StatusOK, api.LFSLockList{
 			Locks: []*api.LFSLock{},
 		})
 		return
 	}
-	ctx.JSON(200, api.LFSLockList{
+	ctx.JSON(http.StatusOK, api.LFSLockList{
 		Locks: []*api.LFSLock{convert.ToLFSLock(lock)},
 	})
 }
@@ -86,7 +87,7 @@ func GetListLockHandler(ctx *context.Context) {
 	authenticated := authenticate(ctx, repository, rv.Authorization, false)
 	if !authenticated {
 		ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-		ctx.JSON(401, api.LFSLockError{
+		ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 			Message: "You must have pull access to list locks",
 		})
 		return
@@ -106,7 +107,7 @@ func GetListLockHandler(ctx *context.Context) {
 	if id != "" { //Case where we request a specific id
 		v, err := strconv.ParseInt(id, 10, 64)
 		if err != nil {
-			ctx.JSON(400, api.LFSLockError{
+			ctx.JSON(http.StatusBadRequest, api.LFSLockError{
 				Message: "bad request : " + err.Error(),
 			})
 			return
@@ -133,7 +134,7 @@ func GetListLockHandler(ctx *context.Context) {
 	lockList, err := models.GetLFSLockByRepoID(repository.ID, cursor, limit)
 	if err != nil {
 		log.Error("Unable to list locks for repository ID[%d]: Error: %v", repository.ID, err)
-		ctx.JSON(500, api.LFSLockError{
+		ctx.JSON(http.StatusInternalServerError, api.LFSLockError{
 			Message: "unable to list locks : Internal Server Error",
 		})
 		return
@@ -146,7 +147,7 @@ func GetListLockHandler(ctx *context.Context) {
 	if limit > 0 && len(lockList) == limit {
 		next = strconv.Itoa(cursor + 1)
 	}
-	ctx.JSON(200, api.LFSLockList{
+	ctx.JSON(http.StatusOK, api.LFSLockList{
 		Locks: lockListAPI,
 		Next:  next,
 	})
@@ -175,7 +176,7 @@ func PostLockHandler(ctx *context.Context) {
 	authenticated := authenticate(ctx, repository, authorization, true)
 	if !authenticated {
 		ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-		ctx.JSON(401, api.LFSLockError{
+		ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 			Message: "You must have push access to create locks",
 		})
 		return
@@ -199,7 +200,7 @@ func PostLockHandler(ctx *context.Context) {
 	})
 	if err != nil {
 		if models.IsErrLFSLockAlreadyExist(err) {
-			ctx.JSON(409, api.LFSLockError{
+			ctx.JSON(http.StatusConflict, api.LFSLockError{
 				Lock:    convert.ToLFSLock(lock),
 				Message: "already created lock",
 			})
@@ -207,18 +208,18 @@ func PostLockHandler(ctx *context.Context) {
 		}
 		if models.IsErrLFSUnauthorizedAction(err) {
 			ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-			ctx.JSON(401, api.LFSLockError{
+			ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 				Message: "You must have push access to create locks : " + err.Error(),
 			})
 			return
 		}
 		log.Error("Unable to CreateLFSLock in repository %-v at %s for user %-v: Error: %v", repository, req.Path, ctx.User, err)
-		ctx.JSON(500, api.LFSLockError{
+		ctx.JSON(http.StatusInternalServerError, api.LFSLockError{
 			Message: "internal server error : Internal Server Error",
 		})
 		return
 	}
-	ctx.JSON(201, api.LFSLockResponse{Lock: convert.ToLFSLock(lock)})
+	ctx.JSON(http.StatusCreated, api.LFSLockResponse{Lock: convert.ToLFSLock(lock)})
 }
 
 // VerifyLockHandler list locks for verification
@@ -244,7 +245,7 @@ func VerifyLockHandler(ctx *context.Context) {
 	authenticated := authenticate(ctx, repository, authorization, true)
 	if !authenticated {
 		ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-		ctx.JSON(401, api.LFSLockError{
+		ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 			Message: "You must have push access to verify locks",
 		})
 		return
@@ -263,7 +264,7 @@ func VerifyLockHandler(ctx *context.Context) {
 	lockList, err := models.GetLFSLockByRepoID(repository.ID, cursor, limit)
 	if err != nil {
 		log.Error("Unable to list locks for repository ID[%d]: Error: %v", repository.ID, err)
-		ctx.JSON(500, api.LFSLockError{
+		ctx.JSON(http.StatusInternalServerError, api.LFSLockError{
 			Message: "unable to list locks : Internal Server Error",
 		})
 		return
@@ -281,7 +282,7 @@ func VerifyLockHandler(ctx *context.Context) {
 			lockTheirsListAPI = append(lockTheirsListAPI, convert.ToLFSLock(l))
 		}
 	}
-	ctx.JSON(200, api.LFSLockListVerify{
+	ctx.JSON(http.StatusOK, api.LFSLockListVerify{
 		Ours:   lockOursListAPI,
 		Theirs: lockTheirsListAPI,
 		Next:   next,
@@ -311,7 +312,7 @@ func UnLockHandler(ctx *context.Context) {
 	authenticated := authenticate(ctx, repository, authorization, true)
 	if !authenticated {
 		ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-		ctx.JSON(401, api.LFSLockError{
+		ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 			Message: "You must have push access to delete locks",
 		})
 		return
@@ -332,16 +333,16 @@ func UnLockHandler(ctx *context.Context) {
 	if err != nil {
 		if models.IsErrLFSUnauthorizedAction(err) {
 			ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
-			ctx.JSON(401, api.LFSLockError{
+			ctx.JSON(http.StatusUnauthorized, api.LFSLockError{
 				Message: "You must have push access to delete locks : " + err.Error(),
 			})
 			return
 		}
 		log.Error("Unable to DeleteLFSLockByID[%d] by user %-v with force %t: Error: %v", ctx.ParamsInt64("lid"), ctx.User, req.Force, err)
-		ctx.JSON(500, api.LFSLockError{
+		ctx.JSON(http.StatusInternalServerError, api.LFSLockError{
 			Message: "unable to delete lock : Internal Server Error",
 		})
 		return
 	}
-	ctx.JSON(200, api.LFSLockResponse{Lock: convert.ToLFSLock(lock)})
+	ctx.JSON(http.StatusOK, api.LFSLockResponse{Lock: convert.ToLFSLock(lock)})
 }
diff --git a/routers/admin/admin.go b/routers/admin/admin.go
index 49f6a394a6..0ce3dfc05f 100644
--- a/routers/admin/admin.go
+++ b/routers/admin/admin.go
@@ -7,6 +7,7 @@ package admin
 
 import (
 	"fmt"
+	"net/http"
 	"net/url"
 	"os"
 	"runtime"
@@ -128,7 +129,7 @@ func Dashboard(ctx *context.Context) {
 	updateSystemStatus()
 	ctx.Data["SysStatus"] = sysStatus
 	ctx.Data["SSH"] = setting.SSH
-	ctx.HTML(200, tplDashboard)
+	ctx.HTML(http.StatusOK, tplDashboard)
 }
 
 // DashboardPost run an admin operation
@@ -315,7 +316,7 @@ func Config(ctx *context.Context) {
 	ctx.Data["EnableXORMLog"] = setting.EnableXORMLog
 	ctx.Data["LogSQL"] = setting.Database.LogSQL
 
-	ctx.HTML(200, tplConfig)
+	ctx.HTML(http.StatusOK, tplConfig)
 }
 
 // Monitor show admin monitor page
@@ -326,14 +327,14 @@ func Monitor(ctx *context.Context) {
 	ctx.Data["Processes"] = process.GetManager().Processes()
 	ctx.Data["Entries"] = cron.ListTasks()
 	ctx.Data["Queues"] = queue.GetManager().ManagedQueues()
-	ctx.HTML(200, tplMonitor)
+	ctx.HTML(http.StatusOK, tplMonitor)
 }
 
 // MonitorCancel cancels a process
 func MonitorCancel(ctx *context.Context) {
 	pid := ctx.ParamsInt64("pid")
 	process.GetManager().Cancel(pid)
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/monitor",
 	})
 }
@@ -350,7 +351,7 @@ func Queue(ctx *context.Context) {
 	ctx.Data["PageIsAdmin"] = true
 	ctx.Data["PageIsAdminMonitor"] = true
 	ctx.Data["Queue"] = mq
-	ctx.HTML(200, tplQueue)
+	ctx.HTML(http.StatusOK, tplQueue)
 }
 
 // WorkerCancel cancels a worker group
@@ -364,7 +365,7 @@ func WorkerCancel(ctx *context.Context) {
 	pid := ctx.ParamsInt64("pid")
 	mq.CancelWorkers(pid)
 	ctx.Flash.Info(ctx.Tr("admin.monitor.queue.pool.cancelling"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/monitor/queue/" + strconv.FormatInt(qid, 10),
 	})
 }
diff --git a/routers/admin/auths.go b/routers/admin/auths.go
index 12d0a2ccfa..790eecedb7 100644
--- a/routers/admin/auths.go
+++ b/routers/admin/auths.go
@@ -7,6 +7,7 @@ package admin
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"regexp"
 
 	"code.gitea.io/gitea/models"
@@ -49,7 +50,7 @@ func Authentications(ctx *context.Context) {
 	}
 
 	ctx.Data["Total"] = models.CountLoginSources()
-	ctx.HTML(200, tplAuths)
+	ctx.HTML(http.StatusOK, tplAuths)
 }
 
 type dropdownItem struct {
@@ -109,7 +110,7 @@ func NewAuthSource(ctx *context.Context) {
 		break
 	}
 
-	ctx.HTML(200, tplAuthNew)
+	ctx.HTML(http.StatusOK, tplAuthNew)
 }
 
 func parseLDAPConfig(form auth.AuthenticationForm) *models.LDAPConfig {
@@ -256,13 +257,13 @@ func NewAuthSourcePost(ctx *context.Context) {
 			return
 		}
 	default:
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 	ctx.Data["HasTLS"] = hasTLS
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplAuthNew)
+		ctx.HTML(http.StatusOK, tplAuthNew)
 		return
 	}
 
@@ -310,7 +311,7 @@ func EditAuthSource(ctx *context.Context) {
 	if source.IsOAuth2() {
 		ctx.Data["CurrentOAuth2Provider"] = models.OAuth2Providers[source.OAuth2().Provider]
 	}
-	ctx.HTML(200, tplAuthEdit)
+	ctx.HTML(http.StatusOK, tplAuthEdit)
 }
 
 // EditAuthSourcePost response for editing auth source
@@ -333,7 +334,7 @@ func EditAuthSourcePost(ctx *context.Context) {
 	ctx.Data["HasTLS"] = source.HasTLS()
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplAuthEdit)
+		ctx.HTML(http.StatusOK, tplAuthEdit)
 		return
 	}
 
@@ -356,7 +357,7 @@ func EditAuthSourcePost(ctx *context.Context) {
 			return
 		}
 	default:
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 
@@ -367,7 +368,7 @@ func EditAuthSourcePost(ctx *context.Context) {
 	if err := models.UpdateSource(source); err != nil {
 		if models.IsErrOpenIDConnectInitialize(err) {
 			ctx.Flash.Error(err.Error(), true)
-			ctx.HTML(200, tplAuthEdit)
+			ctx.HTML(http.StatusOK, tplAuthEdit)
 		} else {
 			ctx.ServerError("UpdateSource", err)
 		}
@@ -393,7 +394,7 @@ func DeleteAuthSource(ctx *context.Context) {
 		} else {
 			ctx.Flash.Error(fmt.Sprintf("DeleteSource: %v", err))
 		}
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"redirect": setting.AppSubURL + "/admin/auths/" + ctx.Params(":authid"),
 		})
 		return
@@ -401,7 +402,7 @@ func DeleteAuthSource(ctx *context.Context) {
 	log.Trace("Authentication deleted by admin(%s): %d", ctx.User.Name, source.ID)
 
 	ctx.Flash.Success(ctx.Tr("admin.auths.deletion_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/auths",
 	})
 }
diff --git a/routers/admin/emails.go b/routers/admin/emails.go
index 4cc7253ca9..f7e8c97fb6 100644
--- a/routers/admin/emails.go
+++ b/routers/admin/emails.go
@@ -6,6 +6,7 @@ package admin
 
 import (
 	"bytes"
+	"net/http"
 	"net/url"
 
 	"code.gitea.io/gitea/models"
@@ -96,7 +97,7 @@ func Emails(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplEmails)
+	ctx.HTML(http.StatusOK, tplEmails)
 }
 
 var (
@@ -118,7 +119,7 @@ func ActivateEmail(ctx *context.Context) {
 	activate, oka := truefalse[ctx.Query("activate")]
 
 	if uid == 0 || len(email) == 0 || !okp || !oka {
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 
diff --git a/routers/admin/hooks.go b/routers/admin/hooks.go
index e233e8ac00..ff32260cc0 100644
--- a/routers/admin/hooks.go
+++ b/routers/admin/hooks.go
@@ -5,6 +5,8 @@
 package admin
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -53,7 +55,7 @@ func DefaultOrSystemWebhooks(ctx *context.Context) {
 	ctx.Data["DefaultWebhooks"] = def
 	ctx.Data["SystemWebhooks"] = sys
 
-	ctx.HTML(200, tplAdminHooks)
+	ctx.HTML(http.StatusOK, tplAdminHooks)
 }
 
 // DeleteDefaultOrSystemWebhook handler to delete an admin-defined system or default webhook
@@ -64,7 +66,7 @@ func DeleteDefaultOrSystemWebhook(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.settings.webhook_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/hooks",
 	})
 }
diff --git a/routers/admin/notice.go b/routers/admin/notice.go
index 2ee1b59730..e2ebd0d917 100644
--- a/routers/admin/notice.go
+++ b/routers/admin/notice.go
@@ -6,6 +6,7 @@
 package admin
 
 import (
+	"net/http"
 	"strconv"
 
 	"code.gitea.io/gitea/models"
@@ -42,7 +43,7 @@ func Notices(ctx *context.Context) {
 
 	ctx.Data["Page"] = context.NewPagination(int(total), setting.UI.Admin.NoticePagingNum, page, 5)
 
-	ctx.HTML(200, tplNotices)
+	ctx.HTML(http.StatusOK, tplNotices)
 }
 
 // DeleteNotices delete the specific notices
diff --git a/routers/admin/repos.go b/routers/admin/repos.go
index 46d0b60f24..82b8cc1a7d 100644
--- a/routers/admin/repos.go
+++ b/routers/admin/repos.go
@@ -5,6 +5,7 @@
 package admin
 
 import (
+	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
@@ -53,7 +54,7 @@ func DeleteRepo(ctx *context.Context) {
 	log.Trace("Repository deleted: %s", repo.FullName())
 
 	ctx.Flash.Success(ctx.Tr("repo.settings.deletion_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/repos?page=" + ctx.Query("page") + "&sort=" + ctx.Query("sort"),
 	})
 }
@@ -85,7 +86,7 @@ func UnadoptedRepos(ctx *context.Context) {
 		pager.SetDefaultParams(ctx)
 		pager.AddParam(ctx, "search", "search")
 		ctx.Data["Page"] = pager
-		ctx.HTML(200, tplUnadoptedRepos)
+		ctx.HTML(http.StatusOK, tplUnadoptedRepos)
 		return
 	}
 
@@ -99,7 +100,7 @@ func UnadoptedRepos(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	pager.AddParam(ctx, "search", "search")
 	ctx.Data["Page"] = pager
-	ctx.HTML(200, tplUnadoptedRepos)
+	ctx.HTML(http.StatusOK, tplUnadoptedRepos)
 }
 
 // AdoptOrDeleteRepository adopts or deletes a repository
diff --git a/routers/admin/users.go b/routers/admin/users.go
index e3f5692030..13609ac746 100644
--- a/routers/admin/users.go
+++ b/routers/admin/users.go
@@ -7,6 +7,7 @@ package admin
 
 import (
 	"fmt"
+	"net/http"
 	"strconv"
 	"strings"
 
@@ -60,7 +61,7 @@ func NewUser(ctx *context.Context) {
 	ctx.Data["Sources"] = sources
 
 	ctx.Data["CanSendEmail"] = setting.MailService != nil
-	ctx.HTML(200, tplUserNew)
+	ctx.HTML(http.StatusOK, tplUserNew)
 }
 
 // NewUserPost response for adding a new user
@@ -80,7 +81,7 @@ func NewUserPost(ctx *context.Context) {
 	ctx.Data["CanSendEmail"] = setting.MailService != nil
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplUserNew)
+		ctx.HTML(http.StatusOK, tplUserNew)
 		return
 	}
 
@@ -212,7 +213,7 @@ func EditUser(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplUserEdit)
+	ctx.HTML(http.StatusOK, tplUserEdit)
 }
 
 // EditUserPost response for editting user
@@ -229,7 +230,7 @@ func EditUserPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplUserEdit)
+		ctx.HTML(http.StatusOK, tplUserEdit)
 		return
 	}
 
@@ -348,12 +349,12 @@ func DeleteUser(ctx *context.Context) {
 		switch {
 		case models.IsErrUserOwnRepos(err):
 			ctx.Flash.Error(ctx.Tr("admin.users.still_own_repo"))
-			ctx.JSON(200, map[string]interface{}{
+			ctx.JSON(http.StatusOK, map[string]interface{}{
 				"redirect": setting.AppSubURL + "/admin/users/" + ctx.Params(":userid"),
 			})
 		case models.IsErrUserHasOrgs(err):
 			ctx.Flash.Error(ctx.Tr("admin.users.still_has_org"))
-			ctx.JSON(200, map[string]interface{}{
+			ctx.JSON(http.StatusOK, map[string]interface{}{
 				"redirect": setting.AppSubURL + "/admin/users/" + ctx.Params(":userid"),
 			})
 		default:
@@ -364,7 +365,7 @@ func DeleteUser(ctx *context.Context) {
 	log.Trace("Account deleted by admin (%s): %s", ctx.User.Name, u.Name)
 
 	ctx.Flash.Success(ctx.Tr("admin.users.deletion_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/admin/users",
 	})
 }
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 60c4f6d790..88355fb2b3 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -538,7 +538,7 @@ func bind(obj interface{}) http.HandlerFunc {
 		var theObj = reflect.New(tp).Interface() // create a new form obj for every request but not use obj directly
 		errs := binding.Bind(ctx.Req, theObj)
 		if len(errs) > 0 {
-			ctx.Error(422, "validationError", errs[0].Error())
+			ctx.Error(http.StatusUnprocessableEntity, "validationError", errs[0].Error())
 			return
 		}
 		web.SetForm(ctx, theObj)
diff --git a/routers/dev/template.go b/routers/dev/template.go
index 92599a7423..de334c4f8b 100644
--- a/routers/dev/template.go
+++ b/routers/dev/template.go
@@ -5,6 +5,8 @@
 package dev
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -23,5 +25,5 @@ func TemplatePreview(ctx *context.Context) {
 	ctx.Data["ResetPwdCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ResetPwdCodeLives, ctx.Locale.Language())
 	ctx.Data["CurDbValue"] = ""
 
-	ctx.HTML(200, base.TplName(ctx.Params("*")))
+	ctx.HTML(http.StatusOK, base.TplName(ctx.Params("*")))
 }
diff --git a/routers/home.go b/routers/home.go
index 9f54c7aa64..7eaebc081f 100644
--- a/routers/home.go
+++ b/routers/home.go
@@ -7,6 +7,7 @@ package routers
 
 import (
 	"bytes"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -39,11 +40,11 @@ func Home(ctx *context.Context) {
 	if ctx.IsSigned {
 		if !ctx.User.IsActive && setting.Service.RegisterEmailConfirm {
 			ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-			ctx.HTML(200, user.TplActivate)
+			ctx.HTML(http.StatusOK, user.TplActivate)
 		} else if !ctx.User.IsActive || ctx.User.ProhibitLogin {
 			log.Info("Failed authentication attempt for %s from %s", ctx.User.Name, ctx.RemoteAddr())
 			ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-			ctx.HTML(200, "user/auth/prohibit_login")
+			ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
 		} else if ctx.User.MustChangePassword {
 			ctx.Data["Title"] = ctx.Tr("auth.must_change_password")
 			ctx.Data["ChangePasscodeLink"] = setting.AppSubURL + "/user/change_password"
@@ -68,7 +69,7 @@ func Home(ctx *context.Context) {
 
 	ctx.Data["PageIsHome"] = true
 	ctx.Data["IsRepoIndexerEnabled"] = setting.Indexer.RepoIndexerEnabled
-	ctx.HTML(200, tplHome)
+	ctx.HTML(http.StatusOK, tplHome)
 }
 
 // RepoSearchOptions when calling search repositories
@@ -166,7 +167,7 @@ func RenderRepoSearch(ctx *context.Context, opts *RepoSearchOptions) {
 	pager.AddParam(ctx, "topic", "TopicOnly")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, opts.TplName)
+	ctx.HTML(http.StatusOK, opts.TplName)
 }
 
 // ExploreRepos render explore repositories page
@@ -243,7 +244,7 @@ func RenderUserSearch(ctx *context.Context, opts *models.SearchUserOptions, tplN
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplName)
+	ctx.HTML(http.StatusOK, tplName)
 }
 
 // ExploreUsers render explore users page
@@ -402,7 +403,7 @@ func ExploreCode(ctx *context.Context) {
 	pager.AddParam(ctx, "l", "Language")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplExploreCode)
+	ctx.HTML(http.StatusOK, tplExploreCode)
 }
 
 // NotFound render 404 page
diff --git a/routers/install.go b/routers/install.go
index 1af72f2a04..86ec761e7c 100644
--- a/routers/install.go
+++ b/routers/install.go
@@ -146,7 +146,7 @@ func Install(ctx *context.Context) {
 	form.PasswordAlgorithm = setting.PasswordHashAlgo
 
 	middleware.AssignForm(form, ctx.Data)
-	ctx.HTML(200, tplInstall)
+	ctx.HTML(http.StatusOK, tplInstall)
 }
 
 // InstallPost response for submit install items
@@ -165,7 +165,7 @@ func InstallPost(ctx *context.Context) {
 			ctx.Data["Err_Admin"] = true
 		}
 
-		ctx.HTML(200, tplInstall)
+		ctx.HTML(http.StatusOK, tplInstall)
 		return
 	}
 
@@ -450,7 +450,7 @@ func InstallPost(ctx *context.Context) {
 	ctx.Flash.Success(ctx.Tr("install.install_success"))
 
 	ctx.Header().Add("Refresh", "1; url="+setting.AppURL+"user/login")
-	ctx.HTML(200, tplPostInstall)
+	ctx.HTML(http.StatusOK, tplPostInstall)
 
 	// Now get the http.Server from this request and shut it down
 	// NB: This is not our hammerable graceful shutdown this is http.Server.Shutdown
diff --git a/routers/org/home.go b/routers/org/home.go
index ff3e1e3e72..9a40d8be6a 100644
--- a/routers/org/home.go
+++ b/routers/org/home.go
@@ -5,6 +5,7 @@
 package org
 
 import (
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -106,7 +107,7 @@ func Home(ctx *context.Context) {
 	if ctx.User != nil {
 		isMember, err := org.IsOrgMember(ctx.User.ID)
 		if err != nil {
-			ctx.Error(500, "IsOrgMember")
+			ctx.Error(http.StatusInternalServerError, "IsOrgMember")
 			return
 		}
 		opts.PublicOnly = !isMember && !ctx.User.IsAdmin
@@ -137,5 +138,5 @@ func Home(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplOrgHome)
+	ctx.HTML(http.StatusOK, tplOrgHome)
 }
diff --git a/routers/org/members.go b/routers/org/members.go
index 00ca381ad0..934529d7d7 100644
--- a/routers/org/members.go
+++ b/routers/org/members.go
@@ -6,6 +6,8 @@
 package org
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -37,7 +39,7 @@ func Members(ctx *context.Context) {
 	if ctx.User != nil {
 		isMember, err := ctx.Org.Organization.IsOrgMember(ctx.User.ID)
 		if err != nil {
-			ctx.Error(500, "IsOrgMember")
+			ctx.Error(http.StatusInternalServerError, "IsOrgMember")
 			return
 		}
 		opts.PublicOnly = !isMember && !ctx.User.IsAdmin
@@ -45,7 +47,7 @@ func Members(ctx *context.Context) {
 
 	total, err := models.CountOrgMembers(opts)
 	if err != nil {
-		ctx.Error(500, "CountOrgMembers")
+		ctx.Error(http.StatusInternalServerError, "CountOrgMembers")
 		return
 	}
 
@@ -63,7 +65,7 @@ func Members(ctx *context.Context) {
 	ctx.Data["MembersIsUserOrgOwner"] = members.IsUserOrgOwner(org.ID)
 	ctx.Data["MembersTwoFaStatus"] = members.GetTwoFaStatus()
 
-	ctx.HTML(200, tplMembers)
+	ctx.HTML(http.StatusOK, tplMembers)
 }
 
 // MembersAction response for operation to a member of organization
@@ -79,19 +81,19 @@ func MembersAction(ctx *context.Context) {
 	switch ctx.Params(":action") {
 	case "private":
 		if ctx.User.ID != uid && !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		err = models.ChangeOrgUserStatus(org.ID, uid, false)
 	case "public":
 		if ctx.User.ID != uid && !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		err = models.ChangeOrgUserStatus(org.ID, uid, true)
 	case "remove":
 		if !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		err = org.RemoveMember(uid)
@@ -111,7 +113,7 @@ func MembersAction(ctx *context.Context) {
 
 	if err != nil {
 		log.Error("Action(%s): %v", ctx.Params(":action"), err)
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"ok":  false,
 			"err": err.Error(),
 		})
diff --git a/routers/org/org.go b/routers/org/org.go
index 98a327a97e..7b430e1708 100644
--- a/routers/org/org.go
+++ b/routers/org/org.go
@@ -7,6 +7,7 @@ package org
 
 import (
 	"errors"
+	"net/http"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
@@ -30,7 +31,7 @@ func Create(ctx *context.Context) {
 		ctx.ServerError("Not allowed", errors.New(ctx.Tr("org.form.create_org_not_allowed")))
 		return
 	}
-	ctx.HTML(200, tplCreateOrg)
+	ctx.HTML(http.StatusOK, tplCreateOrg)
 }
 
 // CreatePost response for create organization
@@ -44,7 +45,7 @@ func CreatePost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplCreateOrg)
+		ctx.HTML(http.StatusOK, tplCreateOrg)
 		return
 	}
 
diff --git a/routers/org/org_labels.go b/routers/org/org_labels.go
index 554f86c964..a21976402c 100644
--- a/routers/org/org_labels.go
+++ b/routers/org/org_labels.go
@@ -5,6 +5,8 @@
 package org
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 	auth "code.gitea.io/gitea/modules/forms"
@@ -58,7 +60,7 @@ func UpdateLabel(ctx *context.Context) {
 	if err != nil {
 		switch {
 		case models.IsErrOrgLabelNotExist(err):
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 		default:
 			ctx.ServerError("UpdateLabel", err)
 		}
@@ -83,7 +85,7 @@ func DeleteLabel(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.issues.label_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Org.OrgLink + "/settings/labels",
 	})
 }
diff --git a/routers/org/setting.go b/routers/org/setting.go
index a01b2c862a..aac8fefcc2 100644
--- a/routers/org/setting.go
+++ b/routers/org/setting.go
@@ -6,6 +6,7 @@
 package org
 
 import (
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -35,7 +36,7 @@ func Settings(ctx *context.Context) {
 	ctx.Data["PageIsSettingsOptions"] = true
 	ctx.Data["CurrentVisibility"] = ctx.Org.Organization.Visibility
 	ctx.Data["RepoAdminChangeTeamAccess"] = ctx.Org.Organization.RepoAdminChangeTeamAccess
-	ctx.HTML(200, tplSettingsOptions)
+	ctx.HTML(http.StatusOK, tplSettingsOptions)
 }
 
 // SettingsPost response for settings change submited
@@ -46,7 +47,7 @@ func SettingsPost(ctx *context.Context) {
 	ctx.Data["CurrentVisibility"] = ctx.Org.Organization.Visibility
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplSettingsOptions)
+		ctx.HTML(http.StatusOK, tplSettingsOptions)
 		return
 	}
 
@@ -165,7 +166,7 @@ func SettingsDelete(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplSettingsDelete)
+	ctx.HTML(http.StatusOK, tplSettingsDelete)
 }
 
 // Webhooks render webhook list page
@@ -183,7 +184,7 @@ func Webhooks(ctx *context.Context) {
 	}
 
 	ctx.Data["Webhooks"] = ws
-	ctx.HTML(200, tplSettingsHooks)
+	ctx.HTML(http.StatusOK, tplSettingsHooks)
 }
 
 // DeleteWebhook response for delete webhook
@@ -194,7 +195,7 @@ func DeleteWebhook(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.settings.webhook_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Org.OrgLink + "/settings/hooks",
 	})
 }
@@ -205,5 +206,5 @@ func Labels(ctx *context.Context) {
 	ctx.Data["PageIsOrgSettingsLabels"] = true
 	ctx.Data["RequireTribute"] = true
 	ctx.Data["LabelTemplates"] = models.LabelTemplates
-	ctx.HTML(200, tplSettingsLabels)
+	ctx.HTML(http.StatusOK, tplSettingsLabels)
 }
diff --git a/routers/org/teams.go b/routers/org/teams.go
index cfa49d4e97..ad2c869eb6 100644
--- a/routers/org/teams.go
+++ b/routers/org/teams.go
@@ -44,7 +44,7 @@ func Teams(ctx *context.Context) {
 	}
 	ctx.Data["Teams"] = org.Teams
 
-	ctx.HTML(200, tplTeams)
+	ctx.HTML(http.StatusOK, tplTeams)
 }
 
 // TeamsAction response for join, leave, remove, add operations to team
@@ -60,7 +60,7 @@ func TeamsAction(ctx *context.Context) {
 	switch ctx.Params(":action") {
 	case "join":
 		if !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		err = ctx.Org.Team.AddMember(ctx.User.ID)
@@ -68,14 +68,14 @@ func TeamsAction(ctx *context.Context) {
 		err = ctx.Org.Team.RemoveMember(ctx.User.ID)
 	case "remove":
 		if !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		err = ctx.Org.Team.RemoveMember(uid)
 		page = "team"
 	case "add":
 		if !ctx.Org.IsOwner {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		uname := utils.RemoveUsernameParameterSuffix(strings.ToLower(ctx.Query("uname")))
@@ -111,7 +111,7 @@ func TeamsAction(ctx *context.Context) {
 			ctx.Flash.Error(ctx.Tr("form.last_org_owner"))
 		} else {
 			log.Error("Action(%s): %v", ctx.Params(":action"), err)
-			ctx.JSON(200, map[string]interface{}{
+			ctx.JSON(http.StatusOK, map[string]interface{}{
 				"ok":  false,
 				"err": err.Error(),
 			})
@@ -132,7 +132,7 @@ func TeamsAction(ctx *context.Context) {
 // TeamsRepoAction operate team's repository
 func TeamsRepoAction(ctx *context.Context) {
 	if !ctx.Org.IsOwner {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		return
 	}
 
@@ -168,7 +168,7 @@ func TeamsRepoAction(ctx *context.Context) {
 	}
 
 	if action == "addall" || action == "removeall" {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"redirect": ctx.Org.OrgLink + "/teams/" + ctx.Org.Team.LowerName + "/repositories",
 		})
 		return
@@ -183,7 +183,7 @@ func NewTeam(ctx *context.Context) {
 	ctx.Data["PageIsOrgTeamsNew"] = true
 	ctx.Data["Team"] = &models.Team{}
 	ctx.Data["Units"] = models.Units
-	ctx.HTML(200, tplTeamNew)
+	ctx.HTML(http.StatusOK, tplTeamNew)
 }
 
 // NewTeamPost response for create new team
@@ -218,7 +218,7 @@ func NewTeamPost(ctx *context.Context) {
 	ctx.Data["Team"] = t
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplTeamNew)
+		ctx.HTML(http.StatusOK, tplTeamNew)
 		return
 	}
 
@@ -250,7 +250,7 @@ func TeamMembers(ctx *context.Context) {
 		ctx.ServerError("GetMembers", err)
 		return
 	}
-	ctx.HTML(200, tplTeamMembers)
+	ctx.HTML(http.StatusOK, tplTeamMembers)
 }
 
 // TeamRepositories show the repositories of team
@@ -262,7 +262,7 @@ func TeamRepositories(ctx *context.Context) {
 		ctx.ServerError("GetRepositories", err)
 		return
 	}
-	ctx.HTML(200, tplTeamRepositories)
+	ctx.HTML(http.StatusOK, tplTeamRepositories)
 }
 
 // EditTeam render team edit page
@@ -272,7 +272,7 @@ func EditTeam(ctx *context.Context) {
 	ctx.Data["team_name"] = ctx.Org.Team.Name
 	ctx.Data["desc"] = ctx.Org.Team.Description
 	ctx.Data["Units"] = models.Units
-	ctx.HTML(200, tplTeamNew)
+	ctx.HTML(http.StatusOK, tplTeamNew)
 }
 
 // EditTeamPost response for modify team information
@@ -321,7 +321,7 @@ func EditTeamPost(ctx *context.Context) {
 	t.CanCreateOrgRepo = form.CanCreateOrgRepo
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplTeamNew)
+		ctx.HTML(http.StatusOK, tplTeamNew)
 		return
 	}
 
@@ -351,7 +351,7 @@ func DeleteTeam(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("org.teams.delete_team_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Org.OrgLink + "/teams",
 	})
 }
diff --git a/routers/private/hook.go b/routers/private/hook.go
index 853d3069ec..83c3f21b8f 100644
--- a/routers/private/hook.go
+++ b/routers/private/hook.go
@@ -173,7 +173,7 @@ func HookPreReceive(ctx *gitea_context.PrivateContext) {
 		protectBranch, err := models.GetProtectedBranchBy(repo.ID, branchName)
 		if err != nil {
 			log.Error("Unable to get protected branch: %s in %-v Error: %v", branchName, repo, err)
-			ctx.JSON(500, map[string]interface{}{
+			ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
 				"err": err.Error(),
 			})
 			return
diff --git a/routers/repo/activity.go b/routers/repo/activity.go
index 88c704b8cc..dcb7bf57cd 100644
--- a/routers/repo/activity.go
+++ b/routers/repo/activity.go
@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"net/http"
 	"time"
 
 	"code.gitea.io/gitea/models"
@@ -64,7 +65,7 @@ func Activity(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplActivity)
+	ctx.HTML(http.StatusOK, tplActivity)
 }
 
 // ActivityAuthors renders JSON with top commit authors for given time period over all branches
@@ -98,5 +99,5 @@ func ActivityAuthors(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, authors)
+	ctx.JSON(http.StatusOK, authors)
 }
diff --git a/routers/repo/attachment.go b/routers/repo/attachment.go
index 5df9cdbf12..a896e4a501 100644
--- a/routers/repo/attachment.go
+++ b/routers/repo/attachment.go
@@ -29,13 +29,13 @@ func UploadReleaseAttachment(ctx *context.Context) {
 // UploadAttachment response for uploading attachments
 func uploadAttachment(ctx *context.Context, allowedTypes string) {
 	if !setting.Attachment.Enabled {
-		ctx.Error(404, "attachment is not enabled")
+		ctx.Error(http.StatusNotFound, "attachment is not enabled")
 		return
 	}
 
 	file, header, err := ctx.Req.FormFile("file")
 	if err != nil {
-		ctx.Error(500, fmt.Sprintf("FormFile: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("FormFile: %v", err))
 		return
 	}
 	defer file.Close()
@@ -48,7 +48,7 @@ func uploadAttachment(ctx *context.Context, allowedTypes string) {
 
 	err = upload.Verify(buf, header.Filename, allowedTypes)
 	if err != nil {
-		ctx.Error(400, err.Error())
+		ctx.Error(http.StatusBadRequest, err.Error())
 		return
 	}
 
@@ -57,12 +57,12 @@ func uploadAttachment(ctx *context.Context, allowedTypes string) {
 		Name:       header.Filename,
 	}, buf, file)
 	if err != nil {
-		ctx.Error(500, fmt.Sprintf("NewAttachment: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("NewAttachment: %v", err))
 		return
 	}
 
 	log.Trace("New attachment uploaded: %s", attach.UUID)
-	ctx.JSON(200, map[string]string{
+	ctx.JSON(http.StatusOK, map[string]string{
 		"uuid": attach.UUID,
 	})
 }
@@ -72,19 +72,19 @@ func DeleteAttachment(ctx *context.Context) {
 	file := ctx.Query("file")
 	attach, err := models.GetAttachmentByUUID(file)
 	if err != nil {
-		ctx.Error(400, err.Error())
+		ctx.Error(http.StatusBadRequest, err.Error())
 		return
 	}
 	if !ctx.IsSigned || (ctx.User.ID != attach.UploaderID) {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 	err = models.DeleteAttachment(attach, true)
 	if err != nil {
-		ctx.Error(500, fmt.Sprintf("DeleteAttachment: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("DeleteAttachment: %v", err))
 		return
 	}
-	ctx.JSON(200, map[string]string{
+	ctx.JSON(http.StatusOK, map[string]string{
 		"uuid": attach.UUID,
 	})
 }
@@ -94,7 +94,7 @@ func GetAttachment(ctx *context.Context) {
 	attach, err := models.GetAttachmentByUUID(ctx.Params(":uuid"))
 	if err != nil {
 		if models.IsErrAttachmentNotExist(err) {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 		} else {
 			ctx.ServerError("GetAttachmentByUUID", err)
 		}
diff --git a/routers/repo/blame.go b/routers/repo/blame.go
index 9be1ea05af..f5b228bdfe 100644
--- a/routers/repo/blame.go
+++ b/routers/repo/blame.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"html"
 	gotemplate "html/template"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -184,7 +185,7 @@ func RefBlame(ctx *context.Context) {
 
 	renderBlame(ctx, blameParts, commitNames)
 
-	ctx.HTML(200, tplBlame)
+	ctx.HTML(http.StatusOK, tplBlame)
 }
 
 func renderBlame(ctx *context.Context, blameParts []git.BlamePart, commitNames map[string]models.UserCommit) {
diff --git a/routers/repo/branch.go b/routers/repo/branch.go
index ac6b7a1bed..9a47a41063 100644
--- a/routers/repo/branch.go
+++ b/routers/repo/branch.go
@@ -7,6 +7,7 @@ package repo
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -75,7 +76,7 @@ func Branches(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplBranch)
+	ctx.HTML(http.StatusOK, tplBranch)
 }
 
 // DeleteBranchPost responses for delete merged branch
@@ -163,7 +164,7 @@ func RestoreBranchPost(ctx *context.Context) {
 }
 
 func redirect(ctx *context.Context) {
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/branches",
 	})
 }
diff --git a/routers/repo/commit.go b/routers/repo/commit.go
index 74f1778626..c471952637 100644
--- a/routers/repo/commit.go
+++ b/routers/repo/commit.go
@@ -7,6 +7,7 @@ package repo
 
 import (
 	"errors"
+	"net/http"
 	"path"
 	"strings"
 
@@ -85,7 +86,7 @@ func Commits(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplCommits)
+	ctx.HTML(http.StatusOK, tplCommits)
 }
 
 // Graph render commit graph - show commits from all branches.
@@ -167,11 +168,11 @@ func Graph(ctx *context.Context) {
 	}
 	ctx.Data["Page"] = paginator
 	if ctx.QueryBool("div-only") {
-		ctx.HTML(200, tplGraphDiv)
+		ctx.HTML(http.StatusOK, tplGraphDiv)
 		return
 	}
 
-	ctx.HTML(200, tplGraph)
+	ctx.HTML(http.StatusOK, tplGraph)
 }
 
 // SearchCommits render commits filtered by keyword
@@ -205,7 +206,7 @@ func SearchCommits(ctx *context.Context) {
 	ctx.Data["Reponame"] = ctx.Repo.Repository.Name
 	ctx.Data["CommitCount"] = commits.Len()
 	ctx.Data["Branch"] = ctx.Repo.BranchName
-	ctx.HTML(200, tplCommits)
+	ctx.HTML(http.StatusOK, tplCommits)
 }
 
 // FileHistory show a file's reversions
@@ -253,7 +254,7 @@ func FileHistory(ctx *context.Context) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplCommits)
+	ctx.HTML(http.StatusOK, tplCommits)
 }
 
 // Diff show different from current commit to previous commit
@@ -372,7 +373,7 @@ func Diff(ctx *context.Context) {
 		ctx.ServerError("commit.GetTagName", err)
 		return
 	}
-	ctx.HTML(200, tplCommitPage)
+	ctx.HTML(http.StatusOK, tplCommitPage)
 }
 
 // RawDiff dumps diff results of repository in given commit ID to io.Writer
diff --git a/routers/repo/compare.go b/routers/repo/compare.go
index 0b7bdf7649..7046f3ecdb 100644
--- a/routers/repo/compare.go
+++ b/routers/repo/compare.go
@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"html"
 	"io/ioutil"
+	"net/http"
 	"path"
 	"path/filepath"
 	"strings"
@@ -632,7 +633,7 @@ func CompareDiff(ctx *context.Context) {
 		} else {
 			ctx.Data["HasPullRequest"] = true
 			ctx.Data["PullRequest"] = pr
-			ctx.HTML(200, tplCompareDiff)
+			ctx.HTML(http.StatusOK, tplCompareDiff)
 			return
 		}
 
@@ -660,7 +661,7 @@ func CompareDiff(ctx *context.Context) {
 
 	ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWrite(models.UnitTypePullRequests)
 
-	ctx.HTML(200, tplCompare)
+	ctx.HTML(http.StatusOK, tplCompare)
 }
 
 // ExcerptBlob render blob excerpt contents
@@ -679,7 +680,7 @@ func ExcerptBlob(ctx *context.Context) {
 	chunkSize := gitdiff.BlobExcerptChunkSize
 	commit, err := gitRepo.GetCommit(commitID)
 	if err != nil {
-		ctx.Error(500, "GetCommit")
+		ctx.Error(http.StatusInternalServerError, "GetCommit")
 		return
 	}
 	section := &gitdiff.DiffSection{
@@ -704,7 +705,7 @@ func ExcerptBlob(ctx *context.Context) {
 		idxRight = lastRight
 	}
 	if err != nil {
-		ctx.Error(500, "getExcerptLines")
+		ctx.Error(http.StatusInternalServerError, "getExcerptLines")
 		return
 	}
 	if idxRight > lastRight {
@@ -735,7 +736,7 @@ func ExcerptBlob(ctx *context.Context) {
 	ctx.Data["fileName"] = filePath
 	ctx.Data["AfterCommitID"] = commitID
 	ctx.Data["Anchor"] = anchor
-	ctx.HTML(200, tplBlobExcerpt)
+	ctx.HTML(http.StatusOK, tplBlobExcerpt)
 }
 
 func getExcerptLines(commit *git.Commit, filePath string, idxLeft int, idxRight int, chunkSize int) ([]*gitdiff.DiffLine, error) {
diff --git a/routers/repo/editor.go b/routers/repo/editor.go
index 14a75556d2..3155eca627 100644
--- a/routers/repo/editor.go
+++ b/routers/repo/editor.go
@@ -7,6 +7,7 @@ package repo
 import (
 	"fmt"
 	"io/ioutil"
+	"net/http"
 	"path"
 	"strings"
 
@@ -149,7 +150,7 @@ func editFile(ctx *context.Context, isNewFile bool) {
 	ctx.Data["PreviewableFileModes"] = strings.Join(setting.Repository.Editor.PreviewableFileModes, ",")
 	ctx.Data["Editorconfig"] = GetEditorConfig(ctx, treePath)
 
-	ctx.HTML(200, tplEditFile)
+	ctx.HTML(http.StatusOK, tplEditFile)
 }
 
 // GetEditorConfig returns a editorconfig JSON string for given treePath or "null"
@@ -205,7 +206,7 @@ func editFilePost(ctx *context.Context, form auth.EditRepoFileForm, isNewFile bo
 	ctx.Data["Editorconfig"] = GetEditorConfig(ctx, form.TreePath)
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplEditFile)
+		ctx.HTML(http.StatusOK, tplEditFile)
 		return
 	}
 
@@ -263,10 +264,10 @@ func editFilePost(ctx *context.Context, form auth.EditRepoFileForm, isNewFile bo
 				case git.EntryModeBlob:
 					ctx.RenderWithErr(ctx.Tr("repo.editor.directory_is_a_file", fileErr.Path), tplEditFile, &form)
 				default:
-					ctx.Error(500, err.Error())
+					ctx.Error(http.StatusInternalServerError, err.Error())
 				}
 			} else {
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrRepoFileAlreadyExists(err) {
 			ctx.Data["Err_TreePath"] = true
@@ -276,7 +277,7 @@ func editFilePost(ctx *context.Context, form auth.EditRepoFileForm, isNewFile bo
 			if branchErr, ok := err.(git.ErrBranchNotExist); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_does_not_exist", branchErr.Name), tplEditFile, &form)
 			} else {
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrBranchAlreadyExists(err) {
 			// For when a user specifies a new branch that already exists
@@ -284,7 +285,7 @@ func editFilePost(ctx *context.Context, form auth.EditRepoFileForm, isNewFile bo
 			if branchErr, ok := err.(models.ErrBranchAlreadyExists); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_already_exists", branchErr.BranchName), tplEditFile, &form)
 			} else {
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrCommitIDDoesNotMatch(err) {
 			ctx.RenderWithErr(ctx.Tr("repo.editor.file_changed_while_editing", ctx.Repo.RepoLink+"/compare/"+form.LastCommit+"..."+ctx.Repo.CommitID), tplEditFile, &form)
@@ -344,22 +345,22 @@ func DiffPreviewPost(ctx *context.Context) {
 	form := web.GetForm(ctx).(*auth.EditPreviewDiffForm)
 	treePath := cleanUploadFileName(ctx.Repo.TreePath)
 	if len(treePath) == 0 {
-		ctx.Error(500, "file name to diff is invalid")
+		ctx.Error(http.StatusInternalServerError, "file name to diff is invalid")
 		return
 	}
 
 	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(treePath)
 	if err != nil {
-		ctx.Error(500, "GetTreeEntryByPath: "+err.Error())
+		ctx.Error(http.StatusInternalServerError, "GetTreeEntryByPath: "+err.Error())
 		return
 	} else if entry.IsDir() {
-		ctx.Error(422)
+		ctx.Error(http.StatusUnprocessableEntity)
 		return
 	}
 
 	diff, err := repofiles.GetDiffPreview(ctx.Repo.Repository, ctx.Repo.BranchName, treePath, form.Content)
 	if err != nil {
-		ctx.Error(500, "GetDiffPreview: "+err.Error())
+		ctx.Error(http.StatusInternalServerError, "GetDiffPreview: "+err.Error())
 		return
 	}
 
@@ -369,7 +370,7 @@ func DiffPreviewPost(ctx *context.Context) {
 	}
 	ctx.Data["File"] = diff.Files[0]
 
-	ctx.HTML(200, tplEditDiffPreview)
+	ctx.HTML(http.StatusOK, tplEditDiffPreview)
 }
 
 // DeleteFile render delete file page
@@ -396,7 +397,7 @@ func DeleteFile(ctx *context.Context) {
 	}
 	ctx.Data["new_branch_name"] = GetUniquePatchBranchName(ctx)
 
-	ctx.HTML(200, tplDeleteFile)
+	ctx.HTML(http.StatusOK, tplDeleteFile)
 }
 
 // DeleteFilePost response for deleting file
@@ -418,7 +419,7 @@ func DeleteFilePost(ctx *context.Context) {
 	ctx.Data["last_commit"] = ctx.Repo.CommitID
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplDeleteFile)
+		ctx.HTML(http.StatusOK, tplDeleteFile)
 		return
 	}
 
@@ -473,14 +474,14 @@ func DeleteFilePost(ctx *context.Context) {
 			if branchErr, ok := err.(git.ErrBranchNotExist); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_does_not_exist", branchErr.Name), tplDeleteFile, &form)
 			} else {
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrBranchAlreadyExists(err) {
 			// For when a user specifies a new branch that already exists
 			if branchErr, ok := err.(models.ErrBranchAlreadyExists); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_already_exists", branchErr.BranchName), tplDeleteFile, &form)
 			} else {
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrCommitIDDoesNotMatch(err) || git.IsErrPushOutOfDate(err) {
 			ctx.RenderWithErr(ctx.Tr("repo.editor.file_changed_while_deleting", ctx.Repo.RepoLink+"/compare/"+form.LastCommit+"..."+ctx.Repo.CommitID), tplDeleteFile, &form)
@@ -560,7 +561,7 @@ func UploadFile(ctx *context.Context) {
 	}
 	ctx.Data["new_branch_name"] = GetUniquePatchBranchName(ctx)
 
-	ctx.HTML(200, tplUploadFile)
+	ctx.HTML(http.StatusOK, tplUploadFile)
 }
 
 // UploadFilePost response for uploading file
@@ -597,7 +598,7 @@ func UploadFilePost(ctx *context.Context) {
 	ctx.Data["new_branch_name"] = branchName
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplUploadFile)
+		ctx.HTML(http.StatusOK, tplUploadFile)
 		return
 	}
 
@@ -672,7 +673,7 @@ func UploadFilePost(ctx *context.Context) {
 			case git.EntryModeBlob:
 				ctx.RenderWithErr(ctx.Tr("repo.editor.directory_is_a_file", fileErr.Path), tplUploadFile, &form)
 			default:
-				ctx.Error(500, err.Error())
+				ctx.Error(http.StatusInternalServerError, err.Error())
 			}
 		} else if models.IsErrRepoFileAlreadyExists(err) {
 			ctx.Data["Err_TreePath"] = true
@@ -734,7 +735,7 @@ func cleanUploadFileName(name string) string {
 func UploadFileToServer(ctx *context.Context) {
 	file, header, err := ctx.Req.FormFile("file")
 	if err != nil {
-		ctx.Error(500, fmt.Sprintf("FormFile: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("FormFile: %v", err))
 		return
 	}
 	defer file.Close()
@@ -747,24 +748,24 @@ func UploadFileToServer(ctx *context.Context) {
 
 	err = upload.Verify(buf, header.Filename, setting.Repository.Upload.AllowedTypes)
 	if err != nil {
-		ctx.Error(400, err.Error())
+		ctx.Error(http.StatusBadRequest, err.Error())
 		return
 	}
 
 	name := cleanUploadFileName(header.Filename)
 	if len(name) == 0 {
-		ctx.Error(500, "Upload file name is invalid")
+		ctx.Error(http.StatusInternalServerError, "Upload file name is invalid")
 		return
 	}
 
 	upload, err := models.NewUpload(name, buf, file)
 	if err != nil {
-		ctx.Error(500, fmt.Sprintf("NewUpload: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("NewUpload: %v", err))
 		return
 	}
 
 	log.Trace("New file uploaded: %s", upload.UUID)
-	ctx.JSON(200, map[string]string{
+	ctx.JSON(http.StatusOK, map[string]string{
 		"uuid": upload.UUID,
 	})
 }
@@ -778,7 +779,7 @@ func RemoveUploadFileFromServer(ctx *context.Context) {
 	}
 
 	if err := models.DeleteUploadByUUID(form.File); err != nil {
-		ctx.Error(500, fmt.Sprintf("DeleteUploadByUUID: %v", err))
+		ctx.Error(http.StatusInternalServerError, fmt.Sprintf("DeleteUploadByUUID: %v", err))
 		return
 	}
 
diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index c2969ca4bd..73531fc313 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -393,7 +393,7 @@ func Issues(ctx *context.Context) {
 
 	ctx.Data["CanWriteIssuesOrPulls"] = ctx.Repo.CanWriteIssuesOrPulls(isPullList)
 
-	ctx.HTML(200, tplIssues)
+	ctx.HTML(http.StatusOK, tplIssues)
 }
 
 // RetrieveRepoMilestonesAndAssignees find all the milestones and assignees of a repository
@@ -819,7 +819,7 @@ func NewIssue(ctx *context.Context) {
 
 	ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWrite(models.UnitTypeIssues)
 
-	ctx.HTML(200, tplIssueNew)
+	ctx.HTML(http.StatusOK, tplIssueNew)
 }
 
 // NewIssueChooseTemplate render creating issue from template page
@@ -832,7 +832,7 @@ func NewIssueChooseTemplate(ctx *context.Context) {
 	ctx.Data["NewIssueChooseTemplate"] = len(issueTemplates) > 0
 	ctx.Data["IssueTemplates"] = issueTemplates
 
-	ctx.HTML(200, tplIssueChoose)
+	ctx.HTML(http.StatusOK, tplIssueChoose)
 }
 
 // ValidateRepoMetas check and returns repository's meta informations
@@ -960,7 +960,7 @@ func NewIssuePost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplIssueNew)
+		ctx.HTML(http.StatusOK, tplIssueNew)
 		return
 	}
 
@@ -981,7 +981,7 @@ func NewIssuePost(ctx *context.Context) {
 
 	if err := issue_service.NewIssue(repo, issue, labelIDs, attachments, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
-			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err.Error())
+			ctx.Error(http.StatusBadRequest, "UserDoesNotHaveAccessToRepo", err.Error())
 			return
 		}
 		ctx.ServerError("NewIssue", err)
@@ -1578,7 +1578,7 @@ func ViewIssue(ctx *context.Context) {
 	ctx.Data["IsRepoAdmin"] = ctx.IsSigned && (ctx.Repo.IsAdmin() || ctx.User.IsAdmin)
 	ctx.Data["LockReasons"] = setting.Repository.Issue.LockReasons
 	ctx.Data["RefEndName"] = git.RefEndName(issue.Ref)
-	ctx.HTML(200, tplIssueView)
+	ctx.HTML(http.StatusOK, tplIssueView)
 }
 
 // GetActionIssue will return the issue which is used in the context.
@@ -1650,13 +1650,13 @@ func UpdateIssueTitle(ctx *context.Context) {
 	}
 
 	if !ctx.IsSigned || (!issue.IsPoster(ctx.User.ID) && !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)) {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
 	title := ctx.QueryTrim("title")
 	if len(title) == 0 {
-		ctx.Error(204)
+		ctx.Error(http.StatusNoContent)
 		return
 	}
 
@@ -1665,7 +1665,7 @@ func UpdateIssueTitle(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"title": issue.Title,
 	})
 }
@@ -1678,7 +1678,7 @@ func UpdateIssueRef(ctx *context.Context) {
 	}
 
 	if !ctx.IsSigned || (!issue.IsPoster(ctx.User.ID) && !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)) || issue.IsPull {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
@@ -1689,7 +1689,7 @@ func UpdateIssueRef(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ref": ref,
 	})
 }
@@ -1702,7 +1702,7 @@ func UpdateIssueContent(ctx *context.Context) {
 	}
 
 	if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)) {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
@@ -1717,7 +1717,7 @@ func UpdateIssueContent(ctx *context.Context) {
 		ctx.ServerError("UpdateAttachments", err)
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"content":     string(markdown.Render([]byte(issue.Content), ctx.Query("context"), ctx.Repo.Repository.ComposeMetas())),
 		"attachments": attachmentsHTML(ctx, issue.Attachments, issue.Content),
 	})
@@ -1743,7 +1743,7 @@ func UpdateIssueMilestone(ctx *context.Context) {
 		}
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -1789,7 +1789,7 @@ func UpdateIssueAssignee(ctx *context.Context) {
 			}
 		}
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -1914,7 +1914,7 @@ func UpdatePullReviewRequest(ctx *context.Context) {
 		}
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -1954,7 +1954,7 @@ func UpdateIssueStatus(ctx *context.Context) {
 			}
 		}
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -1986,7 +1986,7 @@ func NewComment(ctx *context.Context) {
 			}
 		}
 
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
@@ -2109,17 +2109,17 @@ func UpdateCommentContent(ctx *context.Context) {
 	}
 
 	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.CanWriteIssuesOrPulls(comment.Issue.IsPull)) {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	} else if comment.Type != models.CommentTypeComment && comment.Type != models.CommentTypeCode {
-		ctx.Error(204)
+		ctx.Error(http.StatusNoContent)
 		return
 	}
 
 	oldContent := comment.Content
 	comment.Content = ctx.Query("content")
 	if len(comment.Content) == 0 {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"content": "",
 		})
 		return
@@ -2134,7 +2134,7 @@ func UpdateCommentContent(ctx *context.Context) {
 		ctx.ServerError("UpdateAttachments", err)
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"content":     string(markdown.Render([]byte(comment.Content), ctx.Query("context"), ctx.Repo.Repository.ComposeMetas())),
 		"attachments": attachmentsHTML(ctx, comment.Attachments, comment.Content),
 	})
@@ -2154,10 +2154,10 @@ func DeleteComment(ctx *context.Context) {
 	}
 
 	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.CanWriteIssuesOrPulls(comment.Issue.IsPull)) {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	} else if comment.Type != models.CommentTypeComment && comment.Type != models.CommentTypeCode {
-		ctx.Error(204)
+		ctx.Error(http.StatusNoContent)
 		return
 	}
 
@@ -2196,7 +2196,7 @@ func ChangeIssueReaction(ctx *context.Context) {
 			}
 		}
 
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
@@ -2244,7 +2244,7 @@ func ChangeIssueReaction(ctx *context.Context) {
 	}
 
 	if len(issue.Reactions) == 0 {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"empty": true,
 			"html":  "",
 		})
@@ -2260,7 +2260,7 @@ func ChangeIssueReaction(ctx *context.Context) {
 		ctx.ServerError("ChangeIssueReaction.HTMLString", err)
 		return
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"html": html,
 	})
 }
@@ -2298,10 +2298,10 @@ func ChangeCommentReaction(ctx *context.Context) {
 			}
 		}
 
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	} else if comment.Type != models.CommentTypeComment && comment.Type != models.CommentTypeCode {
-		ctx.Error(204)
+		ctx.Error(http.StatusNoContent)
 		return
 	}
 
@@ -2344,7 +2344,7 @@ func ChangeCommentReaction(ctx *context.Context) {
 	}
 
 	if len(comment.Reactions) == 0 {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"empty": true,
 			"html":  "",
 		})
@@ -2360,7 +2360,7 @@ func ChangeCommentReaction(ctx *context.Context) {
 		ctx.ServerError("ChangeCommentReaction.HTMLString", err)
 		return
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"html": html,
 	})
 }
@@ -2406,7 +2406,7 @@ func GetIssueAttachments(ctx *context.Context) {
 	for i := 0; i < len(issue.Attachments); i++ {
 		attachments[i] = convert.ToReleaseAttachment(issue.Attachments[i])
 	}
-	ctx.JSON(200, attachments)
+	ctx.JSON(http.StatusOK, attachments)
 }
 
 // GetCommentAttachments returns attachments for the comment
@@ -2426,7 +2426,7 @@ func GetCommentAttachments(ctx *context.Context) {
 			attachments = append(attachments, convert.ToReleaseAttachment(comment.Attachments[i]))
 		}
 	}
-	ctx.JSON(200, attachments)
+	ctx.JSON(http.StatusOK, attachments)
 }
 
 func updateAttachments(item interface{}, files []string) error {
diff --git a/routers/repo/issue_label.go b/routers/repo/issue_label.go
index 35035103d5..28df82a2d5 100644
--- a/routers/repo/issue_label.go
+++ b/routers/repo/issue_label.go
@@ -5,6 +5,8 @@
 package repo
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -26,7 +28,7 @@ func Labels(ctx *context.Context) {
 	ctx.Data["PageIsLabels"] = true
 	ctx.Data["RequireTribute"] = true
 	ctx.Data["LabelTemplates"] = models.LabelTemplates
-	ctx.HTML(200, tplLabels)
+	ctx.HTML(http.StatusOK, tplLabels)
 }
 
 // InitializeLabels init labels for a repository
@@ -127,7 +129,7 @@ func UpdateLabel(ctx *context.Context) {
 	if err != nil {
 		switch {
 		case models.IsErrRepoLabelNotExist(err):
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 		default:
 			ctx.ServerError("UpdateLabel", err)
 		}
@@ -152,7 +154,7 @@ func DeleteLabel(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.issues.label_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/labels",
 	})
 }
@@ -176,7 +178,7 @@ func UpdateIssueLabel(ctx *context.Context) {
 		label, err := models.GetLabelByID(ctx.QueryInt64("id"))
 		if err != nil {
 			if models.IsErrRepoLabelNotExist(err) {
-				ctx.Error(404, "GetLabelByID")
+				ctx.Error(http.StatusNotFound, "GetLabelByID")
 			} else {
 				ctx.ServerError("GetLabelByID", err)
 			}
@@ -211,11 +213,11 @@ func UpdateIssueLabel(ctx *context.Context) {
 		}
 	default:
 		log.Warn("Unrecognized action: %s", action)
-		ctx.Error(500)
+		ctx.Error(http.StatusInternalServerError)
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
diff --git a/routers/repo/issue_watch.go b/routers/repo/issue_watch.go
index 07671af13a..dabbff842b 100644
--- a/routers/repo/issue_watch.go
+++ b/routers/repo/issue_watch.go
@@ -38,7 +38,7 @@ func IssueWatch(ctx *context.Context) {
 				log.Trace("Permission Denied: Not logged in")
 			}
 		}
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
diff --git a/routers/repo/lfs.go b/routers/repo/lfs.go
index fb0e3b10ea..07d36d67ec 100644
--- a/routers/repo/lfs.go
+++ b/routers/repo/lfs.go
@@ -11,6 +11,7 @@ import (
 	gotemplate "html/template"
 	"io"
 	"io/ioutil"
+	"net/http"
 	"path"
 	"strconv"
 	"strings"
@@ -63,7 +64,7 @@ func LFSFiles(ctx *context.Context) {
 	}
 	ctx.Data["LFSFiles"] = lfsMetaObjects
 	ctx.Data["Page"] = pager
-	ctx.HTML(200, tplSettingsLFS)
+	ctx.HTML(http.StatusOK, tplSettingsLFS)
 }
 
 // LFSLocks shows a repository's LFS locks
@@ -97,7 +98,7 @@ func LFSLocks(ctx *context.Context) {
 
 	if len(lfsLocks) == 0 {
 		ctx.Data["Page"] = pager
-		ctx.HTML(200, tplSettingsLFSLocks)
+		ctx.HTML(http.StatusOK, tplSettingsLFSLocks)
 		return
 	}
 
@@ -186,7 +187,7 @@ func LFSLocks(ctx *context.Context) {
 	ctx.Data["Linkable"] = linkable
 
 	ctx.Data["Page"] = pager
-	ctx.HTML(200, tplSettingsLFSLocks)
+	ctx.HTML(http.StatusOK, tplSettingsLFSLocks)
 }
 
 // LFSLockFile locks a file
@@ -339,7 +340,7 @@ func LFSFileGet(ctx *context.Context) {
 	case base.IsImageFile(buf):
 		ctx.Data["IsImageFile"] = true
 	}
-	ctx.HTML(200, tplSettingsLFSFile)
+	ctx.HTML(http.StatusOK, tplSettingsLFSFile)
 }
 
 // LFSDelete disassociates the provided oid from the repository and if the lfs file is no longer associated with any repositories - deletes it
@@ -404,7 +405,7 @@ func LFSFileFind(ctx *context.Context) {
 	}
 
 	ctx.Data["Results"] = results
-	ctx.HTML(200, tplSettingsLFSFileFind)
+	ctx.HTML(http.StatusOK, tplSettingsLFSFileFind)
 }
 
 // LFSPointerFiles will search the repository for pointer files and report which are missing LFS files in the content store
@@ -478,7 +479,7 @@ func LFSPointerFiles(ctx *context.Context) {
 		}
 	default:
 	}
-	ctx.HTML(200, tplSettingsLFSPointers)
+	ctx.HTML(http.StatusOK, tplSettingsLFSPointers)
 }
 
 type pointerResult struct {
diff --git a/routers/repo/migrate.go b/routers/repo/migrate.go
index 6b4e7852ae..752cdbf512 100644
--- a/routers/repo/migrate.go
+++ b/routers/repo/migrate.go
@@ -41,7 +41,7 @@ func Migrate(ctx *context.Context) {
 		ctx.Data["Org"] = ctx.Query("org")
 		ctx.Data["Mirror"] = ctx.Query("mirror")
 
-		ctx.HTML(200, tplMigrate)
+		ctx.HTML(http.StatusOK, tplMigrate)
 		return
 	}
 
@@ -60,7 +60,7 @@ func Migrate(ctx *context.Context) {
 	}
 	ctx.Data["ContextUser"] = ctxUser
 
-	ctx.HTML(200, base.TplName("repo/migrate/"+serviceType.Name()))
+	ctx.HTML(http.StatusOK, base.TplName("repo/migrate/"+serviceType.Name()))
 }
 
 func handleMigrateError(ctx *context.Context, owner *models.User, err error, name string, tpl base.TplName, form *auth.MigrateRepoForm) {
@@ -135,7 +135,7 @@ func MigratePost(ctx *context.Context) {
 	tpl := base.TplName("repo/migrate/" + serviceType.Name())
 
 	if ctx.HasError() {
-		ctx.HTML(200, tpl)
+		ctx.HTML(http.StatusOK, tpl)
 		return
 	}
 
diff --git a/routers/repo/milestone.go b/routers/repo/milestone.go
index a9beed75d7..2dc8366f0d 100644
--- a/routers/repo/milestone.go
+++ b/routers/repo/milestone.go
@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"net/http"
 	"time"
 
 	"code.gitea.io/gitea/models"
@@ -95,7 +96,7 @@ func Milestones(ctx *context.Context) {
 	pager.AddParam(ctx, "state", "State")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplMilestone)
+	ctx.HTML(http.StatusOK, tplMilestone)
 }
 
 // NewMilestone render creating milestone page
@@ -103,7 +104,7 @@ func NewMilestone(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("repo.milestones.new")
 	ctx.Data["PageIsIssueList"] = true
 	ctx.Data["PageIsMilestones"] = true
-	ctx.HTML(200, tplMilestoneNew)
+	ctx.HTML(http.StatusOK, tplMilestoneNew)
 }
 
 // NewMilestonePost response for creating milestone
@@ -114,7 +115,7 @@ func NewMilestonePost(ctx *context.Context) {
 	ctx.Data["PageIsMilestones"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplMilestoneNew)
+		ctx.HTML(http.StatusOK, tplMilestoneNew)
 		return
 	}
 
@@ -163,7 +164,7 @@ func EditMilestone(ctx *context.Context) {
 	if len(m.DeadlineString) > 0 {
 		ctx.Data["deadline"] = m.DeadlineString
 	}
-	ctx.HTML(200, tplMilestoneNew)
+	ctx.HTML(http.StatusOK, tplMilestoneNew)
 }
 
 // EditMilestonePost response for edting milestone
@@ -174,7 +175,7 @@ func EditMilestonePost(ctx *context.Context) {
 	ctx.Data["PageIsEditMilestone"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplMilestoneNew)
+		ctx.HTML(http.StatusOK, tplMilestoneNew)
 		return
 	}
 
@@ -242,7 +243,7 @@ func DeleteMilestone(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.milestones.deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/milestones",
 	})
 }
@@ -272,5 +273,5 @@ func MilestoneIssuesAndPulls(ctx *context.Context) {
 	ctx.Data["CanWriteIssues"] = ctx.Repo.CanWriteIssuesOrPulls(false)
 	ctx.Data["CanWritePulls"] = ctx.Repo.CanWriteIssuesOrPulls(true)
 
-	ctx.HTML(200, tplMilestoneIssues)
+	ctx.HTML(http.StatusOK, tplMilestoneIssues)
 }
diff --git a/routers/repo/projects.go b/routers/repo/projects.go
index 4aa03e9efc..df02209876 100644
--- a/routers/repo/projects.go
+++ b/routers/repo/projects.go
@@ -6,6 +6,7 @@ package repo
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -101,7 +102,7 @@ func Projects(ctx *context.Context) {
 	ctx.Data["IsProjectsPage"] = true
 	ctx.Data["SortType"] = sortType
 
-	ctx.HTML(200, tplProjects)
+	ctx.HTML(http.StatusOK, tplProjects)
 }
 
 // NewProject render creating a project page
@@ -109,7 +110,7 @@ func NewProject(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("repo.projects.new")
 	ctx.Data["ProjectTypes"] = models.GetProjectsConfig()
 	ctx.Data["CanWriteProjects"] = ctx.Repo.Permission.CanWrite(models.UnitTypeProjects)
-	ctx.HTML(200, tplProjectsNew)
+	ctx.HTML(http.StatusOK, tplProjectsNew)
 }
 
 // NewProjectPost creates a new project
@@ -120,7 +121,7 @@ func NewProjectPost(ctx *context.Context) {
 	if ctx.HasError() {
 		ctx.Data["CanWriteProjects"] = ctx.Repo.Permission.CanWrite(models.UnitTypeProjects)
 		ctx.Data["ProjectTypes"] = models.GetProjectsConfig()
-		ctx.HTML(200, tplProjectsNew)
+		ctx.HTML(http.StatusOK, tplProjectsNew)
 		return
 	}
 
@@ -186,7 +187,7 @@ func DeleteProject(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.projects.deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/projects",
 	})
 }
@@ -215,7 +216,7 @@ func EditProject(ctx *context.Context) {
 	ctx.Data["title"] = p.Title
 	ctx.Data["content"] = p.Description
 
-	ctx.HTML(200, tplProjectsNew)
+	ctx.HTML(http.StatusOK, tplProjectsNew)
 }
 
 // EditProjectPost response for editing a project
@@ -227,7 +228,7 @@ func EditProjectPost(ctx *context.Context) {
 	ctx.Data["CanWriteProjects"] = ctx.Repo.Permission.CanWrite(models.UnitTypeProjects)
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplProjectsNew)
+		ctx.HTML(http.StatusOK, tplProjectsNew)
 		return
 	}
 
@@ -318,7 +319,7 @@ func ViewProject(ctx *context.Context) {
 	ctx.Data["PageIsProjects"] = true
 	ctx.Data["RequiresDraggable"] = true
 
-	ctx.HTML(200, tplProjectsView)
+	ctx.HTML(http.StatusOK, tplProjectsView)
 }
 
 // UpdateIssueProject change an issue's project
@@ -341,7 +342,7 @@ func UpdateIssueProject(ctx *context.Context) {
 		}
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -349,14 +350,14 @@ func UpdateIssueProject(ctx *context.Context) {
 // DeleteProjectBoard allows for the deletion of a project board
 func DeleteProjectBoard(ctx *context.Context) {
 	if ctx.User == nil {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only signed in users are allowed to perform this action.",
 		})
 		return
 	}
 
 	if !ctx.Repo.IsOwner() && !ctx.Repo.IsAdmin() && !ctx.Repo.CanAccess(models.AccessModeWrite, models.UnitTypeProjects) {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only authorized users are allowed to perform this action.",
 		})
 		return
@@ -378,14 +379,14 @@ func DeleteProjectBoard(ctx *context.Context) {
 		return
 	}
 	if pb.ProjectID != ctx.ParamsInt64(":id") {
-		ctx.JSON(422, map[string]string{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]string{
 			"message": fmt.Sprintf("ProjectBoard[%d] is not in Project[%d] as expected", pb.ID, project.ID),
 		})
 		return
 	}
 
 	if project.RepoID != ctx.Repo.Repository.ID {
-		ctx.JSON(422, map[string]string{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]string{
 			"message": fmt.Sprintf("ProjectBoard[%d] is not in Repository[%d] as expected", pb.ID, ctx.Repo.Repository.ID),
 		})
 		return
@@ -396,7 +397,7 @@ func DeleteProjectBoard(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -405,7 +406,7 @@ func DeleteProjectBoard(ctx *context.Context) {
 func AddBoardToProjectPost(ctx *context.Context) {
 	form := web.GetForm(ctx).(*auth.EditProjectBoardForm)
 	if !ctx.Repo.IsOwner() && !ctx.Repo.IsAdmin() && !ctx.Repo.CanAccess(models.AccessModeWrite, models.UnitTypeProjects) {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only authorized users are allowed to perform this action.",
 		})
 		return
@@ -430,21 +431,21 @@ func AddBoardToProjectPost(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
 
 func checkProjectBoardChangePermissions(ctx *context.Context) (*models.Project, *models.ProjectBoard) {
 	if ctx.User == nil {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only signed in users are allowed to perform this action.",
 		})
 		return nil, nil
 	}
 
 	if !ctx.Repo.IsOwner() && !ctx.Repo.IsAdmin() && !ctx.Repo.CanAccess(models.AccessModeWrite, models.UnitTypeProjects) {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only authorized users are allowed to perform this action.",
 		})
 		return nil, nil
@@ -466,14 +467,14 @@ func checkProjectBoardChangePermissions(ctx *context.Context) (*models.Project,
 		return nil, nil
 	}
 	if board.ProjectID != ctx.ParamsInt64(":id") {
-		ctx.JSON(422, map[string]string{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]string{
 			"message": fmt.Sprintf("ProjectBoard[%d] is not in Project[%d] as expected", board.ID, project.ID),
 		})
 		return nil, nil
 	}
 
 	if project.RepoID != ctx.Repo.Repository.ID {
-		ctx.JSON(422, map[string]string{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]string{
 			"message": fmt.Sprintf("ProjectBoard[%d] is not in Repository[%d] as expected", board.ID, ctx.Repo.Repository.ID),
 		})
 		return nil, nil
@@ -502,7 +503,7 @@ func EditProjectBoard(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -520,7 +521,7 @@ func SetDefaultProjectBoard(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -529,14 +530,14 @@ func SetDefaultProjectBoard(ctx *context.Context) {
 func MoveIssueAcrossBoards(ctx *context.Context) {
 
 	if ctx.User == nil {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only signed in users are allowed to perform this action.",
 		})
 		return
 	}
 
 	if !ctx.Repo.IsOwner() && !ctx.Repo.IsAdmin() && !ctx.Repo.CanAccess(models.AccessModeWrite, models.UnitTypeProjects) {
-		ctx.JSON(403, map[string]string{
+		ctx.JSON(http.StatusForbidden, map[string]string{
 			"message": "Only authorized users are allowed to perform this action.",
 		})
 		return
@@ -598,7 +599,7 @@ func MoveIssueAcrossBoards(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -609,7 +610,7 @@ func CreateProject(ctx *context.Context) {
 	ctx.Data["ProjectTypes"] = models.GetProjectsConfig()
 	ctx.Data["CanWriteProjects"] = ctx.Repo.Permission.CanWrite(models.UnitTypeProjects)
 
-	ctx.HTML(200, tplGenericProjectsNew)
+	ctx.HTML(http.StatusOK, tplGenericProjectsNew)
 }
 
 // CreateProjectPost creates an individual and/or organization project
@@ -624,7 +625,7 @@ func CreateProjectPost(ctx *context.Context, form auth.UserCreateProjectForm) {
 
 	if ctx.HasError() {
 		ctx.Data["CanWriteProjects"] = ctx.Repo.Permission.CanWrite(models.UnitTypeProjects)
-		ctx.HTML(200, tplGenericProjectsNew)
+		ctx.HTML(http.StatusOK, tplGenericProjectsNew)
 		return
 	}
 
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index cc6841da47..0002263013 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -167,7 +167,7 @@ func Fork(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplFork)
+	ctx.HTML(http.StatusOK, tplFork)
 }
 
 // ForkPost response for forking a repository
@@ -188,7 +188,7 @@ func ForkPost(ctx *context.Context) {
 	ctx.Data["ContextUser"] = ctxUser
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplFork)
+		ctx.HTML(http.StatusOK, tplFork)
 		return
 	}
 
@@ -221,7 +221,7 @@ func ForkPost(ctx *context.Context) {
 			ctx.ServerError("IsOwnedBy", err)
 			return
 		} else if !isOwner {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 	}
@@ -570,7 +570,7 @@ func ViewPullCommits(ctx *context.Context) {
 	ctx.Data["CommitCount"] = commits.Len()
 
 	getBranchData(ctx, issue)
-	ctx.HTML(200, tplPullCommits)
+	ctx.HTML(http.StatusOK, tplPullCommits)
 }
 
 // ViewPullFiles render pull request changed files list page
@@ -692,7 +692,7 @@ func ViewPullFiles(ctx *context.Context) {
 	getBranchData(ctx, issue)
 	ctx.Data["IsIssuePoster"] = ctx.IsSigned && issue.IsPoster(ctx.User.ID)
 	ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)
-	ctx.HTML(200, tplPullFiles)
+	ctx.HTML(http.StatusOK, tplPullFiles)
 }
 
 // UpdatePullRequest merge PR's baseBranch into headBranch
@@ -1015,7 +1015,7 @@ func CompareAndPullRequestPost(ctx *context.Context) {
 			return
 		}
 
-		ctx.HTML(200, tplCompareDiff)
+		ctx.HTML(http.StatusOK, tplCompareDiff)
 		return
 	}
 
@@ -1054,7 +1054,7 @@ func CompareAndPullRequestPost(ctx *context.Context) {
 
 	if err := pull_service.NewPullRequest(repo, pullIssue, labelIDs, attachments, pullRequest, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
-			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err.Error())
+			ctx.Error(http.StatusBadRequest, "UserDoesNotHaveAccessToRepo", err.Error())
 			return
 		} else if git.IsErrPushRejected(err) {
 			pushrejErr := err.(*git.ErrPushRejected)
@@ -1090,7 +1090,7 @@ func TriggerTask(ctx *context.Context) {
 	branch := ctx.Query("branch")
 	secret := ctx.Query("secret")
 	if len(branch) == 0 || len(secret) == 0 || pusherID <= 0 {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		log.Trace("TriggerTask: branch or secret is empty, or pusher ID is not valid")
 		return
 	}
@@ -1101,7 +1101,7 @@ func TriggerTask(ctx *context.Context) {
 	got := []byte(base.EncodeMD5(owner.Salt))
 	want := []byte(secret)
 	if subtle.ConstantTimeCompare(got, want) != 1 {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		log.Trace("TriggerTask [%s/%s]: invalid secret", owner.Name, repo.Name)
 		return
 	}
@@ -1109,7 +1109,7 @@ func TriggerTask(ctx *context.Context) {
 	pusher, err := models.GetUserByID(pusherID)
 	if err != nil {
 		if models.IsErrUserNotExist(err) {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 		} else {
 			ctx.ServerError("GetUserByID", err)
 		}
@@ -1179,7 +1179,7 @@ func CleanUpPullRequest(ctx *context.Context) {
 	defer gitBaseRepo.Close()
 
 	defer func() {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"redirect": pr.BaseRepo.Link() + "/pulls/" + fmt.Sprint(issue.Index),
 		})
 	}()
diff --git a/routers/repo/pull_review.go b/routers/repo/pull_review.go
index 89e87ccc44..d75135c40a 100644
--- a/routers/repo/pull_review.go
+++ b/routers/repo/pull_review.go
@@ -6,6 +6,7 @@ package repo
 
 import (
 	"fmt"
+	"net/http"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
@@ -41,7 +42,7 @@ func RenderNewCodeCommentForm(ctx *context.Context) {
 		return
 	}
 	ctx.Data["AfterCommitID"] = pullHeadCommitID
-	ctx.HTML(200, tplNewComment)
+	ctx.HTML(http.StatusOK, tplNewComment)
 }
 
 // CreateCodeComment will create a code comment including an pending review if required
@@ -120,12 +121,12 @@ func UpdateResolveConversation(ctx *context.Context) {
 		return
 	}
 	if !permResult {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
 	if !comment.Issue.IsPull {
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 
@@ -136,7 +137,7 @@ func UpdateResolveConversation(ctx *context.Context) {
 			return
 		}
 	} else {
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 
@@ -144,7 +145,7 @@ func UpdateResolveConversation(ctx *context.Context) {
 		renderConversation(ctx, comment)
 		return
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"ok": true,
 	})
 }
@@ -169,7 +170,7 @@ func renderConversation(ctx *context.Context, comment *models.Comment) {
 		return
 	}
 	ctx.Data["AfterCommitID"] = pullHeadCommitID
-	ctx.HTML(200, tplConversation)
+	ctx.HTML(http.StatusOK, tplConversation)
 }
 
 // SubmitReview creates a review out of the existing pending review or creates a new one if no pending review exist
diff --git a/routers/repo/release.go b/routers/repo/release.go
index 7c87fce327..9f6e502482 100644
--- a/routers/repo/release.go
+++ b/routers/repo/release.go
@@ -7,6 +7,7 @@ package repo
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -141,7 +142,7 @@ func releasesOrTags(ctx *context.Context, isTagList bool) {
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplReleases)
+	ctx.HTML(http.StatusOK, tplReleases)
 }
 
 // SingleRelease renders a single release's page
@@ -184,7 +185,7 @@ func SingleRelease(ctx *context.Context) {
 	release.Note = markdown.RenderString(release.Note, ctx.Repo.RepoLink, ctx.Repo.Repository.ComposeMetas())
 
 	ctx.Data["Releases"] = []*models.Release{release}
-	ctx.HTML(200, tplReleases)
+	ctx.HTML(http.StatusOK, tplReleases)
 }
 
 // LatestRelease redirects to the latest release
@@ -237,7 +238,7 @@ func NewRelease(ctx *context.Context) {
 	}
 	ctx.Data["IsAttachmentEnabled"] = setting.Attachment.Enabled
 	upload.AddUploadContext(ctx, "release")
-	ctx.HTML(200, tplReleaseNew)
+	ctx.HTML(http.StatusOK, tplReleaseNew)
 }
 
 // NewReleasePost response for creating a release
@@ -249,7 +250,7 @@ func NewReleasePost(ctx *context.Context) {
 	ctx.Data["RequireTribute"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplReleaseNew)
+		ctx.HTML(http.StatusOK, tplReleaseNew)
 		return
 	}
 
@@ -378,7 +379,7 @@ func EditRelease(ctx *context.Context) {
 	}
 	ctx.Data["attachments"] = rel.Attachments
 
-	ctx.HTML(200, tplReleaseNew)
+	ctx.HTML(http.StatusOK, tplReleaseNew)
 }
 
 // EditReleasePost response for edit release
@@ -411,7 +412,7 @@ func EditReleasePost(ctx *context.Context) {
 	ctx.Data["prerelease"] = rel.IsPrerelease
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplReleaseNew)
+		ctx.HTML(http.StatusOK, tplReleaseNew)
 		return
 	}
 
@@ -464,13 +465,13 @@ func deleteReleaseOrTag(ctx *context.Context, isDelTag bool) {
 	}
 
 	if isDelTag {
-		ctx.JSON(200, map[string]interface{}{
+		ctx.JSON(http.StatusOK, map[string]interface{}{
 			"redirect": ctx.Repo.RepoLink + "/tags",
 		})
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/releases",
 	})
 }
diff --git a/routers/repo/repo.go b/routers/repo/repo.go
index 6fa566e7d6..68ffc4376a 100644
--- a/routers/repo/repo.go
+++ b/routers/repo/repo.go
@@ -8,6 +8,7 @@ package repo
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"strings"
 	"time"
 
@@ -85,7 +86,7 @@ func checkContextUser(ctx *context.Context, uid int64) *models.User {
 
 	// Check ownership of organization.
 	if !org.IsOrganization() {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return nil
 	}
 	if !ctx.User.IsAdmin {
@@ -94,7 +95,7 @@ func checkContextUser(ctx *context.Context, uid int64) *models.User {
 			ctx.ServerError("CanCreateOrgRepo", err)
 			return nil
 		} else if !canCreate {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return nil
 		}
 	} else {
@@ -149,7 +150,7 @@ func Create(ctx *context.Context) {
 	ctx.Data["CanCreateRepo"] = ctx.User.CanCreateRepo()
 	ctx.Data["MaxCreationLimit"] = ctx.User.MaxCreationLimit()
 
-	ctx.HTML(200, tplCreate)
+	ctx.HTML(http.StatusOK, tplCreate)
 }
 
 func handleCreateError(ctx *context.Context, owner *models.User, err error, name string, tpl base.TplName, form interface{}) {
@@ -199,7 +200,7 @@ func CreatePost(ctx *context.Context) {
 	ctx.Data["ContextUser"] = ctxUser
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplCreate)
+		ctx.HTML(http.StatusOK, tplCreate)
 		return
 	}
 
@@ -281,7 +282,7 @@ func Action(ctx *context.Context) {
 		err = acceptOrRejectRepoTransfer(ctx, false)
 	case "desc": // FIXME: this is not used
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 
@@ -339,7 +340,7 @@ func RedirectDownload(ctx *context.Context) {
 	releases, err := models.GetReleasesByRepoIDAndNames(models.DefaultDBContext(), curRepo.ID, tagNames)
 	if err != nil {
 		if models.IsErrAttachmentNotExist(err) {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		ctx.ServerError("RedirectDownload", err)
@@ -349,7 +350,7 @@ func RedirectDownload(ctx *context.Context) {
 		release := releases[0]
 		att, err := models.GetAttachmentByReleaseIDFileName(release.ID, fileName)
 		if err != nil {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if att != nil {
@@ -357,7 +358,7 @@ func RedirectDownload(ctx *context.Context) {
 			return
 		}
 	}
-	ctx.Error(404)
+	ctx.Error(http.StatusNotFound)
 }
 
 // Download an archive of a repository
@@ -366,7 +367,7 @@ func Download(ctx *context.Context) {
 	aReq := archiver_service.DeriveRequestFrom(ctx, uri)
 
 	if aReq == nil {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		return
 	}
 
@@ -380,7 +381,7 @@ func Download(ctx *context.Context) {
 	if complete {
 		ctx.ServeFile(aReq.GetArchivePath(), downloadName)
 	} else {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 	}
 }
 
@@ -392,7 +393,7 @@ func InitiateDownload(ctx *context.Context) {
 	aReq := archiver_service.DeriveRequestFrom(ctx, uri)
 
 	if aReq == nil {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		return
 	}
 
@@ -402,7 +403,7 @@ func InitiateDownload(ctx *context.Context) {
 		complete, _ = aReq.TimedWaitForCompletion(ctx, 2*time.Second)
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"complete": complete,
 	})
 }
diff --git a/routers/repo/search.go b/routers/repo/search.go
index 481b64d184..af4fe9ef12 100644
--- a/routers/repo/search.go
+++ b/routers/repo/search.go
@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"net/http"
 	"path"
 	"strings"
 
@@ -51,5 +52,5 @@ func Search(ctx *context.Context) {
 	pager.AddParam(ctx, "l", "Language")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplSearch)
+	ctx.HTML(http.StatusOK, tplSearch)
 }
diff --git a/routers/repo/setting.go b/routers/repo/setting.go
index 8349164d4c..7d9d358311 100644
--- a/routers/repo/setting.go
+++ b/routers/repo/setting.go
@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"net/http"
 	"strings"
 	"time"
 
@@ -51,7 +52,7 @@ func Settings(ctx *context.Context) {
 	ctx.Data["SigningKeyAvailable"] = len(signing) > 0
 	ctx.Data["SigningSettings"] = setting.Repository.Signing
 
-	ctx.HTML(200, tplSettingsOptions)
+	ctx.HTML(http.StatusOK, tplSettingsOptions)
 }
 
 // SettingsPost response for changes of a repository
@@ -65,7 +66,7 @@ func SettingsPost(ctx *context.Context) {
 	switch ctx.Query("action") {
 	case "update":
 		if ctx.HasError() {
-			ctx.HTML(200, tplSettingsOptions)
+			ctx.HTML(http.StatusOK, tplSettingsOptions)
 			return
 		}
 
@@ -366,7 +367,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "admin":
 		if !ctx.User.IsAdmin {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 
@@ -386,7 +387,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "convert":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if repo.Name != form.RepoName {
@@ -395,7 +396,7 @@ func SettingsPost(ctx *context.Context) {
 		}
 
 		if !repo.IsMirror {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		repo.IsMirror = false
@@ -413,7 +414,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "convert_fork":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if err := repo.GetOwner(); err != nil {
@@ -426,7 +427,7 @@ func SettingsPost(ctx *context.Context) {
 		}
 
 		if !repo.IsFork {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 
@@ -450,7 +451,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "transfer":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if repo.Name != form.RepoName {
@@ -500,7 +501,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "cancel_transfer":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 
@@ -532,7 +533,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "delete":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if repo.Name != form.RepoName {
@@ -551,7 +552,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "delete-wiki":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		if repo.Name != form.RepoName {
@@ -570,7 +571,7 @@ func SettingsPost(ctx *context.Context) {
 
 	case "archive":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 
@@ -593,7 +594,7 @@ func SettingsPost(ctx *context.Context) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/settings")
 	case "unarchive":
 		if !ctx.Repo.IsOwner() {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 
@@ -638,7 +639,7 @@ func Collaboration(ctx *context.Context) {
 	ctx.Data["Org"] = ctx.Repo.Repository.Owner
 	ctx.Data["Units"] = models.Units
 
-	ctx.HTML(200, tplCollaboration)
+	ctx.HTML(http.StatusOK, tplCollaboration)
 }
 
 // CollaborationPost response for actions for a collaboration of a repository
@@ -709,7 +710,7 @@ func DeleteCollaboration(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.settings.remove_collaborator_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/settings/collaboration",
 	})
 }
@@ -780,7 +781,7 @@ func DeleteTeam(ctx *context.Context) {
 	}
 
 	ctx.Flash.Success(ctx.Tr("repo.settings.remove_team_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/settings/collaboration",
 	})
 }
@@ -822,7 +823,7 @@ func GitHooks(ctx *context.Context) {
 	}
 	ctx.Data["Hooks"] = hooks
 
-	ctx.HTML(200, tplGithooks)
+	ctx.HTML(http.StatusOK, tplGithooks)
 }
 
 // GitHooksEdit render for editing a hook of repository page
@@ -841,7 +842,7 @@ func GitHooksEdit(ctx *context.Context) {
 		return
 	}
 	ctx.Data["Hook"] = hook
-	ctx.HTML(200, tplGithookEdit)
+	ctx.HTML(http.StatusOK, tplGithookEdit)
 }
 
 // GitHooksEditPost response for editing a git hook of a repository
@@ -877,7 +878,7 @@ func DeployKeys(ctx *context.Context) {
 	}
 	ctx.Data["Deploykeys"] = keys
 
-	ctx.HTML(200, tplDeployKeys)
+	ctx.HTML(http.StatusOK, tplDeployKeys)
 }
 
 // DeployKeysPost response for adding a deploy key of a repository
@@ -894,7 +895,7 @@ func DeployKeysPost(ctx *context.Context) {
 	ctx.Data["Deploykeys"] = keys
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplDeployKeys)
+		ctx.HTML(http.StatusOK, tplDeployKeys)
 		return
 	}
 
@@ -948,7 +949,7 @@ func DeleteDeployKey(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.settings.deploy_key_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/settings/keys",
 	})
 }
diff --git a/routers/repo/setting_protected_branch.go b/routers/repo/setting_protected_branch.go
index 017054d4c2..26d50f38b8 100644
--- a/routers/repo/setting_protected_branch.go
+++ b/routers/repo/setting_protected_branch.go
@@ -6,6 +6,7 @@ package repo
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 	"time"
 
@@ -49,7 +50,7 @@ func ProtectedBranch(ctx *context.Context) {
 
 	ctx.Data["LeftBranches"] = leftBranches
 
-	ctx.HTML(200, tplBranches)
+	ctx.HTML(http.StatusOK, tplBranches)
 }
 
 // ProtectedBranchPost response for protect for a branch of a repository
@@ -62,7 +63,7 @@ func ProtectedBranchPost(ctx *context.Context) {
 	switch ctx.Query("action") {
 	case "default_branch":
 		if ctx.HasError() {
-			ctx.HTML(200, tplBranches)
+			ctx.HTML(http.StatusOK, tplBranches)
 			return
 		}
 
@@ -165,7 +166,7 @@ func SettingsProtectedBranch(c *context.Context) {
 	}
 
 	c.Data["Branch"] = protectBranch
-	c.HTML(200, tplProtectedBranch)
+	c.HTML(http.StatusOK, tplProtectedBranch)
 }
 
 // SettingsProtectedBranchPost updates the protected branch settings
diff --git a/routers/repo/topic.go b/routers/repo/topic.go
index b23023ceba..1d99b65094 100644
--- a/routers/repo/topic.go
+++ b/routers/repo/topic.go
@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -15,7 +16,7 @@ import (
 // TopicsPost response for creating repository
 func TopicsPost(ctx *context.Context) {
 	if ctx.User == nil {
-		ctx.JSON(403, map[string]interface{}{
+		ctx.JSON(http.StatusForbidden, map[string]interface{}{
 			"message": "Only owners could change the topics.",
 		})
 		return
@@ -30,7 +31,7 @@ func TopicsPost(ctx *context.Context) {
 	validTopics, invalidTopics := models.SanitizeAndValidateTopics(topics)
 
 	if len(validTopics) > 25 {
-		ctx.JSON(422, map[string]interface{}{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]interface{}{
 			"invalidTopics": nil,
 			"message":       ctx.Tr("repo.topic.count_prompt"),
 		})
@@ -38,7 +39,7 @@ func TopicsPost(ctx *context.Context) {
 	}
 
 	if len(invalidTopics) > 0 {
-		ctx.JSON(422, map[string]interface{}{
+		ctx.JSON(http.StatusUnprocessableEntity, map[string]interface{}{
 			"invalidTopics": invalidTopics,
 			"message":       ctx.Tr("repo.topic.format_prompt"),
 		})
@@ -48,13 +49,13 @@ func TopicsPost(ctx *context.Context) {
 	err := models.SaveTopics(ctx.Repo.Repository.ID, validTopics...)
 	if err != nil {
 		log.Error("SaveTopics failed: %v", err)
-		ctx.JSON(500, map[string]interface{}{
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
 			"message": "Save topics failed.",
 		})
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"status": "ok",
 	})
 }
diff --git a/routers/repo/view.go b/routers/repo/view.go
index 39f16d183c..568d9ec6be 100644
--- a/routers/repo/view.go
+++ b/routers/repo/view.go
@@ -12,6 +12,7 @@ import (
 	gotemplate "html/template"
 	"io"
 	"io/ioutil"
+	"net/http"
 	"net/url"
 	"path"
 	"strconv"
@@ -582,7 +583,7 @@ func Home(ctx *context.Context) {
 			ctx.Data["Repo"] = ctx.Repo
 			ctx.Data["MigrateTask"] = task
 			ctx.Data["CloneAddr"] = safeURL(cfg.CloneAddr)
-			ctx.HTML(200, tplMigrating)
+			ctx.HTML(http.StatusOK, tplMigrating)
 			return
 		}
 
@@ -641,7 +642,7 @@ func renderCode(ctx *context.Context) {
 	ctx.Data["PageIsViewCode"] = true
 
 	if ctx.Repo.Repository.IsEmpty {
-		ctx.HTML(200, tplRepoEMPTY)
+		ctx.HTML(http.StatusOK, tplRepoEMPTY)
 		return
 	}
 
@@ -704,7 +705,7 @@ func renderCode(ctx *context.Context) {
 	ctx.Data["TreeLink"] = treeLink
 	ctx.Data["TreeNames"] = treeNames
 	ctx.Data["BranchLink"] = branchLink
-	ctx.HTML(200, tplRepoHome)
+	ctx.HTML(http.StatusOK, tplRepoHome)
 }
 
 // RenderUserCards render a page show users according the input templaet
@@ -726,7 +727,7 @@ func RenderUserCards(ctx *context.Context, total int, getter func(opts models.Li
 	}
 	ctx.Data["Cards"] = items
 
-	ctx.HTML(200, tpl)
+	ctx.HTML(http.StatusOK, tpl)
 }
 
 // Watchers render repository's watch users
@@ -765,5 +766,5 @@ func Forks(ctx *context.Context) {
 	}
 	ctx.Data["Forks"] = forks
 
-	ctx.HTML(200, tplForks)
+	ctx.HTML(http.StatusOK, tplForks)
 }
diff --git a/routers/repo/webhook.go b/routers/repo/webhook.go
index 1a5090a24e..7ff110edba 100644
--- a/routers/repo/webhook.go
+++ b/routers/repo/webhook.go
@@ -8,6 +8,7 @@ package repo
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"path"
 	"strings"
 
@@ -47,7 +48,7 @@ func Webhooks(ctx *context.Context) {
 	}
 	ctx.Data["Webhooks"] = ws
 
-	ctx.HTML(200, tplHooks)
+	ctx.HTML(http.StatusOK, tplHooks)
 }
 
 type orgRepoCtx struct {
@@ -148,7 +149,7 @@ func WebhooksNew(ctx *context.Context) {
 	}
 	ctx.Data["BaseLink"] = orCtx.LinkNew
 
-	ctx.HTML(200, orCtx.NewTemplate)
+	ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 }
 
 // ParseHookEvent convert web form content to models.HookEvent
@@ -198,7 +199,7 @@ func GiteaHooksNewPost(ctx *context.Context) {
 	ctx.Data["BaseLink"] = orCtx.LinkNew
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -253,7 +254,7 @@ func newGogsWebhookPost(ctx *context.Context, form auth.NewGogshookForm, kind mo
 	ctx.Data["BaseLink"] = orCtx.LinkNew
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -301,7 +302,7 @@ func DiscordHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -354,7 +355,7 @@ func DingtalkHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -397,7 +398,7 @@ func TelegramHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -450,7 +451,7 @@ func MatrixHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -506,7 +507,7 @@ func MSTeamsHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -549,7 +550,7 @@ func SlackHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -610,7 +611,7 @@ func FeishuHooksNewPost(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -695,7 +696,7 @@ func WebHooksEdit(ctx *context.Context) {
 	}
 	ctx.Data["Webhook"] = w
 
-	ctx.HTML(200, orCtx.NewTemplate)
+	ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 }
 
 // WebHooksEditPost response for editing web hook
@@ -712,7 +713,7 @@ func WebHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -753,7 +754,7 @@ func GogsHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -793,7 +794,7 @@ func SlackHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -845,7 +846,7 @@ func DiscordHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -889,7 +890,7 @@ func DingtalkHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -922,7 +923,7 @@ func TelegramHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 	json := jsoniter.ConfigCompatibleWithStandardLibrary
@@ -964,7 +965,7 @@ func MatrixHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 	json := jsoniter.ConfigCompatibleWithStandardLibrary
@@ -1009,7 +1010,7 @@ func MSTeamsHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -1042,7 +1043,7 @@ func FeishuHooksEditPost(ctx *context.Context) {
 	ctx.Data["Webhook"] = w
 
 	if ctx.HasError() {
-		ctx.HTML(200, orCtx.NewTemplate)
+		ctx.HTML(http.StatusOK, orCtx.NewTemplate)
 		return
 	}
 
@@ -1124,7 +1125,7 @@ func DeleteWebhook(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("repo.settings.webhook_deletion_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/settings/hooks",
 	})
 }
diff --git a/routers/repo/wiki.go b/routers/repo/wiki.go
index c4521a3071..64ea4128a7 100644
--- a/routers/repo/wiki.go
+++ b/routers/repo/wiki.go
@@ -8,6 +8,7 @@ package repo
 import (
 	"fmt"
 	"io/ioutil"
+	"net/http"
 	"net/url"
 	"path/filepath"
 	"strings"
@@ -349,7 +350,7 @@ func Wiki(ctx *context.Context) {
 
 	if !ctx.Repo.Repository.HasWiki() {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
-		ctx.HTML(200, tplWikiStart)
+		ctx.HTML(http.StatusOK, tplWikiStart)
 		return
 	}
 
@@ -367,7 +368,7 @@ func Wiki(ctx *context.Context) {
 	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
-		ctx.HTML(200, tplWikiStart)
+		ctx.HTML(http.StatusOK, tplWikiStart)
 		return
 	}
 
@@ -384,7 +385,7 @@ func Wiki(ctx *context.Context) {
 	}
 	ctx.Data["Author"] = lastCommit.Author
 
-	ctx.HTML(200, tplWikiView)
+	ctx.HTML(http.StatusOK, tplWikiView)
 }
 
 // WikiRevision renders file revision list of wiki page
@@ -394,7 +395,7 @@ func WikiRevision(ctx *context.Context) {
 
 	if !ctx.Repo.Repository.HasWiki() {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
-		ctx.HTML(200, tplWikiStart)
+		ctx.HTML(http.StatusOK, tplWikiStart)
 		return
 	}
 
@@ -412,7 +413,7 @@ func WikiRevision(ctx *context.Context) {
 	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
-		ctx.HTML(200, tplWikiStart)
+		ctx.HTML(http.StatusOK, tplWikiStart)
 		return
 	}
 
@@ -425,7 +426,7 @@ func WikiRevision(ctx *context.Context) {
 	}
 	ctx.Data["Author"] = lastCommit.Author
 
-	ctx.HTML(200, tplWikiRevision)
+	ctx.HTML(http.StatusOK, tplWikiRevision)
 }
 
 // WikiPages render wiki pages list page
@@ -495,7 +496,7 @@ func WikiPages(ctx *context.Context) {
 			wikiRepo.Close()
 		}
 	}()
-	ctx.HTML(200, tplWikiPages)
+	ctx.HTML(http.StatusOK, tplWikiPages)
 }
 
 // WikiRaw outputs raw blob requested by user (image for example)
@@ -553,7 +554,7 @@ func NewWiki(ctx *context.Context) {
 		ctx.Data["title"] = "Home"
 	}
 
-	ctx.HTML(200, tplWikiNew)
+	ctx.HTML(http.StatusOK, tplWikiNew)
 }
 
 // NewWikiPost response for wiki create request
@@ -564,7 +565,7 @@ func NewWikiPost(ctx *context.Context) {
 	ctx.Data["RequireSimpleMDE"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplWikiNew)
+		ctx.HTML(http.StatusOK, tplWikiNew)
 		return
 	}
 
@@ -611,7 +612,7 @@ func EditWiki(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplWikiNew)
+	ctx.HTML(http.StatusOK, tplWikiNew)
 }
 
 // EditWikiPost response for wiki modify request
@@ -622,7 +623,7 @@ func EditWikiPost(ctx *context.Context) {
 	ctx.Data["RequireSimpleMDE"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplWikiNew)
+		ctx.HTML(http.StatusOK, tplWikiNew)
 		return
 	}
 
@@ -653,7 +654,7 @@ func DeleteWikiPagePost(ctx *context.Context) {
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": ctx.Repo.RepoLink + "/wiki/",
 	})
 }
diff --git a/routers/routes/web.go b/routers/routes/web.go
index e59609d831..5b382ecccb 100644
--- a/routers/routes/web.go
+++ b/routers/routes/web.go
@@ -313,21 +313,21 @@ func RegisterRoutes(m *web.Route) {
 
 	openIDSignInEnabled := func(ctx *context.Context) {
 		if !setting.Service.EnableOpenIDSignIn {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 	}
 
 	openIDSignUpEnabled := func(ctx *context.Context) {
 		if !setting.Service.EnableOpenIDSignUp {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 	}
 
 	reqMilestonesDashboardPageEnabled := func(ctx *context.Context) {
 		if !setting.Service.ShowMilestonesDashboardPage {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 	}
@@ -335,7 +335,7 @@ func RegisterRoutes(m *web.Route) {
 	// webhooksEnabled requires webhooks to be enabled by admin.
 	webhooksEnabled := func(ctx *context.Context) {
 		if setting.DisableWebhooks {
-			ctx.Error(403)
+			ctx.Error(http.StatusForbidden)
 			return
 		}
 	}
diff --git a/routers/swagger_json.go b/routers/swagger_json.go
index 3ff1674f04..78c7fb1e24 100644
--- a/routers/swagger_json.go
+++ b/routers/swagger_json.go
@@ -5,6 +5,8 @@
 package routers
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/log"
@@ -19,6 +21,6 @@ func SwaggerV1Json(ctx *context.Context) {
 	ctx.Resp.Header().Set("Content-Type", "application/json")
 	if err := t.Execute(ctx.Resp, ctx.Data); err != nil {
 		log.Error("%v", err)
-		ctx.Error(500)
+		ctx.Error(http.StatusInternalServerError)
 	}
 }
diff --git a/routers/user/auth.go b/routers/user/auth.go
index 9217885519..a6d3ace7ba 100644
--- a/routers/user/auth.go
+++ b/routers/user/auth.go
@@ -146,7 +146,7 @@ func SignIn(ctx *context.Context) {
 	ctx.Data["PageIsLogin"] = true
 	ctx.Data["EnableSSPI"] = models.IsSSPIEnabled()
 
-	ctx.HTML(200, tplSignIn)
+	ctx.HTML(http.StatusOK, tplSignIn)
 }
 
 // SignInPost response for sign in request
@@ -167,7 +167,7 @@ func SignInPost(ctx *context.Context) {
 	ctx.Data["EnableSSPI"] = models.IsSSPIEnabled()
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplSignIn)
+		ctx.HTML(http.StatusOK, tplSignIn)
 		return
 	}
 
@@ -183,15 +183,15 @@ func SignInPost(ctx *context.Context) {
 		} else if models.IsErrUserProhibitLogin(err) {
 			log.Info("Failed authentication attempt for %s from %s: %v", form.UserName, ctx.RemoteAddr(), err)
 			ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-			ctx.HTML(200, "user/auth/prohibit_login")
+			ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
 		} else if models.IsErrUserInactive(err) {
 			if setting.Service.RegisterEmailConfirm {
 				ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
-				ctx.HTML(200, TplActivate)
+				ctx.HTML(http.StatusOK, TplActivate)
 			} else {
 				log.Info("Failed authentication attempt for %s from %s: %v", form.UserName, ctx.RemoteAddr(), err)
 				ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
-				ctx.HTML(200, "user/auth/prohibit_login")
+				ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
 			}
 		} else {
 			ctx.ServerError("UserSignIn", err)
@@ -248,7 +248,7 @@ func TwoFactor(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplTwofa)
+	ctx.HTML(http.StatusOK, tplTwofa)
 }
 
 // TwoFactorPost validates a user's two-factor authentication token.
@@ -327,7 +327,7 @@ func TwoFactorScratch(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplTwofaScratch)
+	ctx.HTML(http.StatusOK, tplTwofaScratch)
 }
 
 // TwoFactorScratchPost validates and invalidates a user's two-factor scratch token.
@@ -393,7 +393,7 @@ func U2F(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplU2F)
+	ctx.HTML(http.StatusOK, tplU2F)
 }
 
 // U2FChallenge submits a sign challenge to the browser
@@ -427,7 +427,7 @@ func U2FChallenge(ctx *context.Context) {
 		ctx.ServerError("UserSignIn: unable to store session", err)
 	}
 
-	ctx.JSON(200, challenge.SignRequest(regs.ToRegistrations()))
+	ctx.JSON(http.StatusOK, challenge.SignRequest(regs.ToRegistrations()))
 }
 
 // U2FSign authenticates the user by signResp
@@ -487,7 +487,7 @@ func U2FSign(ctx *context.Context) {
 			return
 		}
 	}
-	ctx.Error(401)
+	ctx.Error(http.StatusUnauthorized)
 }
 
 // This handles the final part of the sign-in process of the user.
@@ -791,7 +791,7 @@ func LinkAccount(ctx *context.Context) {
 		}
 	}
 
-	ctx.HTML(200, tplLinkAccount)
+	ctx.HTML(http.StatusOK, tplLinkAccount)
 }
 
 // LinkAccountPostSignIn handle the coupling of external account with another account using signIn
@@ -821,7 +821,7 @@ func LinkAccountPostSignIn(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplLinkAccount)
+		ctx.HTML(http.StatusOK, tplLinkAccount)
 		return
 	}
 
@@ -908,12 +908,12 @@ func LinkAccountPostRegister(ctx *context.Context) {
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplLinkAccount)
+		ctx.HTML(http.StatusOK, tplLinkAccount)
 		return
 	}
 
 	if setting.Service.DisableRegistration {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
@@ -1033,7 +1033,7 @@ func LinkAccountPostRegister(ctx *context.Context) {
 		ctx.Data["IsSendRegisterMail"] = true
 		ctx.Data["Email"] = u.Email
 		ctx.Data["ActiveCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ActiveCodeLives, ctx.Locale.Language())
-		ctx.HTML(200, TplActivate)
+		ctx.HTML(http.StatusOK, TplActivate)
 
 		if err := ctx.Cache.Put("MailResendLimit_"+u.LowerName, u.LowerName, 180); err != nil {
 			log.Error("Set cache(MailResendLimit) fail: %v", err)
@@ -1084,7 +1084,7 @@ func SignUp(ctx *context.Context) {
 	//Show Disabled Registration message if DisableRegistration or AllowOnlyExternalRegistration options are true
 	ctx.Data["DisableRegistration"] = setting.Service.DisableRegistration || setting.Service.AllowOnlyExternalRegistration
 
-	ctx.HTML(200, tplSignUp)
+	ctx.HTML(http.StatusOK, tplSignUp)
 }
 
 // SignUpPost response for sign up information submission
@@ -1104,12 +1104,12 @@ func SignUpPost(ctx *context.Context) {
 
 	//Permission denied if DisableRegistration or AllowOnlyExternalRegistration options are true
 	if setting.Service.DisableRegistration || setting.Service.AllowOnlyExternalRegistration {
-		ctx.Error(403)
+		ctx.Error(http.StatusForbidden)
 		return
 	}
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplSignUp)
+		ctx.HTML(http.StatusOK, tplSignUp)
 		return
 	}
 
@@ -1218,7 +1218,7 @@ func SignUpPost(ctx *context.Context) {
 		ctx.Data["IsSendRegisterMail"] = true
 		ctx.Data["Email"] = u.Email
 		ctx.Data["ActiveCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ActiveCodeLives, ctx.Locale.Language())
-		ctx.HTML(200, TplActivate)
+		ctx.HTML(http.StatusOK, TplActivate)
 
 		if err := ctx.Cache.Put("MailResendLimit_"+u.LowerName, u.LowerName, 180); err != nil {
 			log.Error("Set cache(MailResendLimit) fail: %v", err)
@@ -1238,7 +1238,7 @@ func Activate(ctx *context.Context) {
 	if len(code) == 0 {
 		ctx.Data["IsActivatePage"] = true
 		if ctx.User.IsActive {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 			return
 		}
 		// Resend confirmation email.
@@ -1256,7 +1256,7 @@ func Activate(ctx *context.Context) {
 		} else {
 			ctx.Data["ServiceNotEnabled"] = true
 		}
-		ctx.HTML(200, TplActivate)
+		ctx.HTML(http.StatusOK, TplActivate)
 		return
 	}
 
@@ -1264,7 +1264,7 @@ func Activate(ctx *context.Context) {
 	// if code is wrong
 	if user == nil {
 		ctx.Data["IsActivateFailed"] = true
-		ctx.HTML(200, TplActivate)
+		ctx.HTML(http.StatusOK, TplActivate)
 		return
 	}
 
@@ -1273,12 +1273,12 @@ func Activate(ctx *context.Context) {
 		if len(password) == 0 {
 			ctx.Data["Code"] = code
 			ctx.Data["NeedsPassword"] = true
-			ctx.HTML(200, TplActivate)
+			ctx.HTML(http.StatusOK, TplActivate)
 			return
 		}
 		if !user.ValidatePassword(password) {
 			ctx.Data["IsActivateFailed"] = true
-			ctx.HTML(200, TplActivate)
+			ctx.HTML(http.StatusOK, TplActivate)
 			return
 		}
 	}
@@ -1291,7 +1291,7 @@ func Activate(ctx *context.Context) {
 	}
 	if err := models.UpdateUserCols(user, "is_active", "rands"); err != nil {
 		if models.IsErrUserNotExist(err) {
-			ctx.Error(404)
+			ctx.Error(http.StatusNotFound)
 		} else {
 			ctx.ServerError("UpdateUser", err)
 		}
@@ -1348,7 +1348,7 @@ func ForgotPasswd(ctx *context.Context) {
 
 	if setting.MailService == nil {
 		ctx.Data["IsResetDisable"] = true
-		ctx.HTML(200, tplForgotPassword)
+		ctx.HTML(http.StatusOK, tplForgotPassword)
 		return
 	}
 
@@ -1356,7 +1356,7 @@ func ForgotPasswd(ctx *context.Context) {
 	ctx.Data["Email"] = email
 
 	ctx.Data["IsResetRequest"] = true
-	ctx.HTML(200, tplForgotPassword)
+	ctx.HTML(http.StatusOK, tplForgotPassword)
 }
 
 // ForgotPasswdPost response for forget password request
@@ -1377,7 +1377,7 @@ func ForgotPasswdPost(ctx *context.Context) {
 		if models.IsErrUserNotExist(err) {
 			ctx.Data["ResetPwdCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ResetPwdCodeLives, ctx.Locale.Language())
 			ctx.Data["IsResetSent"] = true
-			ctx.HTML(200, tplForgotPassword)
+			ctx.HTML(http.StatusOK, tplForgotPassword)
 			return
 		}
 
@@ -1393,7 +1393,7 @@ func ForgotPasswdPost(ctx *context.Context) {
 
 	if ctx.Cache.IsExist("MailResendLimit_" + u.LowerName) {
 		ctx.Data["ResendLimited"] = true
-		ctx.HTML(200, tplForgotPassword)
+		ctx.HTML(http.StatusOK, tplForgotPassword)
 		return
 	}
 
@@ -1405,7 +1405,7 @@ func ForgotPasswdPost(ctx *context.Context) {
 
 	ctx.Data["ResetPwdCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ResetPwdCodeLives, ctx.Locale.Language())
 	ctx.Data["IsResetSent"] = true
-	ctx.HTML(200, tplForgotPassword)
+	ctx.HTML(http.StatusOK, tplForgotPassword)
 }
 
 func commonResetPassword(ctx *context.Context) (*models.User, *models.TwoFactor) {
@@ -1461,7 +1461,7 @@ func ResetPasswd(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplResetPassword)
+	ctx.HTML(http.StatusOK, tplResetPassword)
 }
 
 // ResetPasswdPost response from account recovery request
@@ -1473,7 +1473,7 @@ func ResetPasswdPost(ctx *context.Context) {
 
 	if u == nil {
 		// Flash error has been set
-		ctx.HTML(200, tplResetPassword)
+		ctx.HTML(http.StatusOK, tplResetPassword)
 		return
 	}
 
@@ -1578,7 +1578,7 @@ func MustChangePassword(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("auth.must_change_password")
 	ctx.Data["ChangePasscodeLink"] = setting.AppSubURL + "/user/settings/change_password"
 	ctx.Data["MustChangePassword"] = true
-	ctx.HTML(200, tplMustChangePassword)
+	ctx.HTML(http.StatusOK, tplMustChangePassword)
 }
 
 // MustChangePasswordPost response for updating a user's password after his/her
@@ -1588,7 +1588,7 @@ func MustChangePasswordPost(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("auth.must_change_password")
 	ctx.Data["ChangePasscodeLink"] = setting.AppSubURL + "/user/settings/change_password"
 	if ctx.HasError() {
-		ctx.HTML(200, tplMustChangePassword)
+		ctx.HTML(http.StatusOK, tplMustChangePassword)
 		return
 	}
 	u := ctx.User
diff --git a/routers/user/auth_openid.go b/routers/user/auth_openid.go
index 967e8aad2d..7db61dc09b 100644
--- a/routers/user/auth_openid.go
+++ b/routers/user/auth_openid.go
@@ -6,6 +6,7 @@ package user
 
 import (
 	"fmt"
+	"net/http"
 	"net/url"
 
 	"code.gitea.io/gitea/models"
@@ -61,7 +62,7 @@ func SignInOpenID(ctx *context.Context) {
 
 	ctx.Data["PageIsSignIn"] = true
 	ctx.Data["PageIsLoginOpenID"] = true
-	ctx.HTML(200, tplSignInOpenID)
+	ctx.HTML(http.StatusOK, tplSignInOpenID)
 }
 
 // Check if the given OpenID URI is allowed by blacklist/whitelist
@@ -97,7 +98,7 @@ func SignInOpenIDPost(ctx *context.Context) {
 	ctx.Data["PageIsLoginOpenID"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplSignInOpenID)
+		ctx.HTML(http.StatusOK, tplSignInOpenID)
 		return
 	}
 
@@ -273,7 +274,7 @@ func ConnectOpenID(ctx *context.Context) {
 	if userName != "" {
 		ctx.Data["user_name"] = userName
 	}
-	ctx.HTML(200, tplConnectOID)
+	ctx.HTML(http.StatusOK, tplConnectOID)
 }
 
 // ConnectOpenIDPost handles submission of a form to connect an OpenID URI to an existing account
@@ -344,7 +345,7 @@ func RegisterOpenID(ctx *context.Context) {
 	if email != "" {
 		ctx.Data["email"] = email
 	}
-	ctx.HTML(200, tplSignUpOID)
+	ctx.HTML(http.StatusOK, tplSignUpOID)
 }
 
 // RegisterOpenIDPost handles submission of a form to create a new user authenticated via an OpenID URI
@@ -472,7 +473,7 @@ func RegisterOpenIDPost(ctx *context.Context) {
 		ctx.Data["IsSendRegisterMail"] = true
 		ctx.Data["Email"] = u.Email
 		ctx.Data["ActiveCodeLives"] = timeutil.MinutesToFriendly(setting.Service.ActiveCodeLives, ctx.Locale.Language())
-		ctx.HTML(200, TplActivate)
+		ctx.HTML(http.StatusOK, TplActivate)
 
 		if err := ctx.Cache.Put("MailResendLimit_"+u.LowerName, u.LowerName, 180); err != nil {
 			log.Error("Set cache(MailResendLimit) fail: %v", err)
diff --git a/routers/user/home.go b/routers/user/home.go
index 24aaf00ba8..178ad57a79 100644
--- a/routers/user/home.go
+++ b/routers/user/home.go
@@ -8,6 +8,7 @@ package user
 import (
 	"bytes"
 	"fmt"
+	"net/http"
 	"regexp"
 	"sort"
 	"strconv"
@@ -160,7 +161,7 @@ func Dashboard(ctx *context.Context) {
 	if ctx.Written() {
 		return
 	}
-	ctx.HTML(200, tplDashboard)
+	ctx.HTML(http.StatusOK, tplDashboard)
 }
 
 // Milestones render the user milestones page
@@ -320,7 +321,7 @@ func Milestones(ctx *context.Context) {
 	pager.AddParam(ctx, "state", "State")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplMilestones)
+	ctx.HTML(http.StatusOK, tplMilestones)
 }
 
 // Pulls renders the user's pull request overview page
@@ -705,7 +706,7 @@ func buildIssueOverview(ctx *context.Context, unitType models.UnitType) {
 	pager.AddParam(ctx, "assignee", "AssigneeID")
 	ctx.Data["Page"] = pager
 
-	ctx.HTML(200, tplIssues)
+	ctx.HTML(http.StatusOK, tplIssues)
 }
 
 func getRepoIDs(reposQuery string) []int64 {
diff --git a/routers/user/oauth.go b/routers/user/oauth.go
index d943ec4200..4502c2bd39 100644
--- a/routers/user/oauth.go
+++ b/routers/user/oauth.go
@@ -8,6 +8,7 @@ import (
 	"encoding/base64"
 	"fmt"
 	"html"
+	"net/http"
 	"net/url"
 	"strings"
 
@@ -339,7 +340,7 @@ func AuthorizeOAuth(ctx *context.Context) {
 		// we'll tolerate errors here as they *should* get saved elsewhere
 		log.Error("Unable to save changes to the session: %v", err)
 	}
-	ctx.HTML(200, tplGrantAccess)
+	ctx.HTML(http.StatusOK, tplGrantAccess)
 }
 
 // GrantApplicationOAuth manages the post request submitted when a user grants access to an application
@@ -347,7 +348,7 @@ func GrantApplicationOAuth(ctx *context.Context) {
 	form := web.GetForm(ctx).(*auth.GrantApplicationForm)
 	if ctx.Session.Get("client_id") != form.ClientID || ctx.Session.Get("state") != form.State ||
 		ctx.Session.Get("redirect_uri") != form.RedirectURI {
-		ctx.Error(400)
+		ctx.Error(http.StatusBadRequest)
 		return
 	}
 	app, err := models.GetOAuth2ApplicationByClientID(form.ClientID)
@@ -463,7 +464,7 @@ func handleRefreshToken(ctx *context.Context, form auth.AccessTokenForm) {
 		handleAccessTokenError(ctx, *tokenErr)
 		return
 	}
-	ctx.JSON(200, accessToken)
+	ctx.JSON(http.StatusOK, accessToken)
 }
 
 func handleAuthorizationCode(ctx *context.Context, form auth.AccessTokenForm) {
@@ -526,11 +527,11 @@ func handleAuthorizationCode(ctx *context.Context, form auth.AccessTokenForm) {
 		return
 	}
 	// send successful response
-	ctx.JSON(200, resp)
+	ctx.JSON(http.StatusOK, resp)
 }
 
 func handleAccessTokenError(ctx *context.Context, acErr AccessTokenError) {
-	ctx.JSON(400, acErr)
+	ctx.JSON(http.StatusBadRequest, acErr)
 }
 
 func handleServerError(ctx *context.Context, state string, redirectURI string) {
diff --git a/routers/user/profile.go b/routers/user/profile.go
index ea4a1e8893..40619aaf0f 100644
--- a/routers/user/profile.go
+++ b/routers/user/profile.go
@@ -7,6 +7,7 @@ package user
 
 import (
 	"fmt"
+	"net/http"
 	"path"
 	"strings"
 
@@ -49,7 +50,7 @@ func Profile(ctx *context.Context) {
 		ctx.ServeFile(path.Join(setting.StaticRootPath, "public/img/favicon.png"))
 		return
 	} else if strings.HasSuffix(uname, ".png") {
-		ctx.Error(404)
+		ctx.Error(http.StatusNotFound)
 		return
 	}
 
@@ -268,7 +269,7 @@ func Profile(ctx *context.Context) {
 
 	ctx.Data["ShowUserEmail"] = len(ctxUser.Email) > 0 && ctx.IsSigned && (!ctxUser.KeepEmailPrivate || ctxUser.ID == ctx.User.ID)
 
-	ctx.HTML(200, tplProfile)
+	ctx.HTML(http.StatusOK, tplProfile)
 }
 
 // Action response for follow/unfollow user request
diff --git a/routers/user/setting/account.go b/routers/user/setting/account.go
index 0bf6cf8b87..2b2804b53b 100644
--- a/routers/user/setting/account.go
+++ b/routers/user/setting/account.go
@@ -7,6 +7,7 @@ package setting
 
 import (
 	"errors"
+	"net/http"
 	"time"
 
 	"code.gitea.io/gitea/models"
@@ -33,7 +34,7 @@ func Account(ctx *context.Context) {
 
 	loadAccountData(ctx)
 
-	ctx.HTML(200, tplSettingsAccount)
+	ctx.HTML(http.StatusOK, tplSettingsAccount)
 }
 
 // AccountPost response for change user's password
@@ -45,7 +46,7 @@ func AccountPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadAccountData(ctx)
 
-		ctx.HTML(200, tplSettingsAccount)
+		ctx.HTML(http.StatusOK, tplSettingsAccount)
 		return
 	}
 
@@ -167,7 +168,7 @@ func EmailPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadAccountData(ctx)
 
-		ctx.HTML(200, tplSettingsAccount)
+		ctx.HTML(http.StatusOK, tplSettingsAccount)
 		return
 	}
 
@@ -216,7 +217,7 @@ func DeleteEmail(ctx *context.Context) {
 	log.Trace("Email address deleted: %s", ctx.User.Name)
 
 	ctx.Flash.Success(ctx.Tr("settings.email_deletion_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/account",
 	})
 }
diff --git a/routers/user/setting/applications.go b/routers/user/setting/applications.go
index 8da36dc6cf..367f2b38c1 100644
--- a/routers/user/setting/applications.go
+++ b/routers/user/setting/applications.go
@@ -6,6 +6,8 @@
 package setting
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -25,7 +27,7 @@ func Applications(ctx *context.Context) {
 
 	loadApplicationsData(ctx)
 
-	ctx.HTML(200, tplSettingsApplications)
+	ctx.HTML(http.StatusOK, tplSettingsApplications)
 }
 
 // ApplicationsPost response for add user's access token
@@ -37,7 +39,7 @@ func ApplicationsPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadApplicationsData(ctx)
 
-		ctx.HTML(200, tplSettingsApplications)
+		ctx.HTML(http.StatusOK, tplSettingsApplications)
 		return
 	}
 
@@ -76,7 +78,7 @@ func DeleteApplication(ctx *context.Context) {
 		ctx.Flash.Success(ctx.Tr("settings.delete_token_success"))
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/applications",
 	})
 }
diff --git a/routers/user/setting/keys.go b/routers/user/setting/keys.go
index a52ffd667b..98b7b74137 100644
--- a/routers/user/setting/keys.go
+++ b/routers/user/setting/keys.go
@@ -6,6 +6,8 @@
 package setting
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -28,7 +30,7 @@ func Keys(ctx *context.Context) {
 
 	loadKeysData(ctx)
 
-	ctx.HTML(200, tplSettingsKeys)
+	ctx.HTML(http.StatusOK, tplSettingsKeys)
 }
 
 // KeysPost response for change user's SSH/GPG keys
@@ -43,7 +45,7 @@ func KeysPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadKeysData(ctx)
 
-		ctx.HTML(200, tplSettingsKeys)
+		ctx.HTML(http.StatusOK, tplSettingsKeys)
 		return
 	}
 	switch form.Type {
@@ -188,7 +190,7 @@ func DeleteKey(ctx *context.Context) {
 		ctx.Flash.Warning("Function not implemented")
 		ctx.Redirect(setting.AppSubURL + "/user/settings/keys")
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/keys",
 	})
 }
diff --git a/routers/user/setting/oauth2.go b/routers/user/setting/oauth2.go
index 7f0f8db1c8..a12f4dc1ba 100644
--- a/routers/user/setting/oauth2.go
+++ b/routers/user/setting/oauth2.go
@@ -6,6 +6,7 @@ package setting
 
 import (
 	"fmt"
+	"net/http"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
@@ -29,7 +30,7 @@ func OAuthApplicationsPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadApplicationsData(ctx)
 
-		ctx.HTML(200, tplSettingsApplications)
+		ctx.HTML(http.StatusOK, tplSettingsApplications)
 		return
 	}
 	// TODO validate redirect URI
@@ -49,7 +50,7 @@ func OAuthApplicationsPost(ctx *context.Context) {
 		ctx.ServerError("GenerateClientSecret", err)
 		return
 	}
-	ctx.HTML(200, tplSettingsOAuthApplications)
+	ctx.HTML(http.StatusOK, tplSettingsOAuthApplications)
 }
 
 // OAuthApplicationsEdit response for editing oauth2 application
@@ -61,7 +62,7 @@ func OAuthApplicationsEdit(ctx *context.Context) {
 	if ctx.HasError() {
 		loadApplicationsData(ctx)
 
-		ctx.HTML(200, tplSettingsApplications)
+		ctx.HTML(http.StatusOK, tplSettingsApplications)
 		return
 	}
 	// TODO validate redirect URI
@@ -76,7 +77,7 @@ func OAuthApplicationsEdit(ctx *context.Context) {
 		return
 	}
 	ctx.Flash.Success(ctx.Tr("settings.update_oauth2_application_success"))
-	ctx.HTML(200, tplSettingsOAuthApplications)
+	ctx.HTML(http.StatusOK, tplSettingsOAuthApplications)
 }
 
 // OAuthApplicationsRegenerateSecret handles the post request for regenerating the secret
@@ -104,7 +105,7 @@ func OAuthApplicationsRegenerateSecret(ctx *context.Context) {
 		return
 	}
 	ctx.Flash.Success(ctx.Tr("settings.update_oauth2_application_success"))
-	ctx.HTML(200, tplSettingsOAuthApplications)
+	ctx.HTML(http.StatusOK, tplSettingsOAuthApplications)
 }
 
 // OAuth2ApplicationShow displays the given application
@@ -123,7 +124,7 @@ func OAuth2ApplicationShow(ctx *context.Context) {
 		return
 	}
 	ctx.Data["App"] = app
-	ctx.HTML(200, tplSettingsOAuthApplications)
+	ctx.HTML(http.StatusOK, tplSettingsOAuthApplications)
 }
 
 // DeleteOAuth2Application deletes the given oauth2 application
@@ -135,7 +136,7 @@ func DeleteOAuth2Application(ctx *context.Context) {
 	log.Trace("OAuth2 Application deleted: %s", ctx.User.Name)
 
 	ctx.Flash.Success(ctx.Tr("settings.remove_oauth2_application_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/applications",
 	})
 }
@@ -152,7 +153,7 @@ func RevokeOAuth2Grant(ctx *context.Context) {
 	}
 
 	ctx.Flash.Success(ctx.Tr("settings.revoke_oauth2_grant_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/applications",
 	})
 }
diff --git a/routers/user/setting/profile.go b/routers/user/setting/profile.go
index 38e371196a..c04428261a 100644
--- a/routers/user/setting/profile.go
+++ b/routers/user/setting/profile.go
@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
@@ -37,7 +38,7 @@ func Profile(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsProfile"] = true
 
-	ctx.HTML(200, tplSettingsProfile)
+	ctx.HTML(http.StatusOK, tplSettingsProfile)
 }
 
 // HandleUsernameChange handle username changes from user settings and admin interface
@@ -79,7 +80,7 @@ func ProfilePost(ctx *context.Context) {
 	ctx.Data["PageIsSettingsProfile"] = true
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplSettingsProfile)
+		ctx.HTML(http.StatusOK, tplSettingsProfile)
 		return
 	}
 
@@ -204,7 +205,7 @@ func Organization(ctx *context.Context) {
 		return
 	}
 	ctx.Data["Orgs"] = orgs
-	ctx.HTML(200, tplSettingsOrganization)
+	ctx.HTML(http.StatusOK, tplSettingsOrganization)
 }
 
 // Repos display a list of all repositories of the user
@@ -305,5 +306,5 @@ func Repos(ctx *context.Context) {
 	pager := context.NewPagination(int(count), opts.PageSize, opts.Page, 5)
 	pager.SetDefaultParams(ctx)
 	ctx.Data["Page"] = pager
-	ctx.HTML(200, tplSettingsRepositories)
+	ctx.HTML(http.StatusOK, tplSettingsRepositories)
 }
diff --git a/routers/user/setting/security.go b/routers/user/setting/security.go
index 87e2ba1c02..7753c5c161 100644
--- a/routers/user/setting/security.go
+++ b/routers/user/setting/security.go
@@ -6,6 +6,8 @@
 package setting
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
@@ -30,7 +32,7 @@ func Security(ctx *context.Context) {
 
 	loadSecurityData(ctx)
 
-	ctx.HTML(200, tplSettingsSecurity)
+	ctx.HTML(http.StatusOK, tplSettingsSecurity)
 }
 
 // DeleteAccountLink delete a single account link
@@ -46,7 +48,7 @@ func DeleteAccountLink(ctx *context.Context) {
 		}
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/security",
 	})
 }
diff --git a/routers/user/setting/security_openid.go b/routers/user/setting/security_openid.go
index 401705608a..c5d106e990 100644
--- a/routers/user/setting/security_openid.go
+++ b/routers/user/setting/security_openid.go
@@ -5,6 +5,8 @@
 package setting
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/auth/openid"
 	"code.gitea.io/gitea/modules/context"
@@ -23,7 +25,7 @@ func OpenIDPost(ctx *context.Context) {
 	if ctx.HasError() {
 		loadSecurityData(ctx)
 
-		ctx.HTML(200, tplSettingsSecurity)
+		ctx.HTML(http.StatusOK, tplSettingsSecurity)
 		return
 	}
 
@@ -111,7 +113,7 @@ func DeleteOpenID(ctx *context.Context) {
 	log.Trace("OpenID address deleted: %s", ctx.User.Name)
 
 	ctx.Flash.Success(ctx.Tr("settings.openid_deletion_success"))
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/security",
 	})
 }
diff --git a/routers/user/setting/security_twofa.go b/routers/user/setting/security_twofa.go
index 0dee827cab..a830495f54 100644
--- a/routers/user/setting/security_twofa.go
+++ b/routers/user/setting/security_twofa.go
@@ -10,6 +10,7 @@ import (
 	"encoding/base64"
 	"html/template"
 	"image/png"
+	"net/http"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -162,7 +163,7 @@ func EnrollTwoFactor(ctx *context.Context) {
 		return
 	}
 
-	ctx.HTML(200, tplSettingsTwofaEnroll)
+	ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll)
 }
 
 // EnrollTwoFactorPost handles enrolling the user into 2FA.
@@ -187,7 +188,7 @@ func EnrollTwoFactorPost(ctx *context.Context) {
 		if !twofaGenerateSecretAndQr(ctx) {
 			return
 		}
-		ctx.HTML(200, tplSettingsTwofaEnroll)
+		ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll)
 		return
 	}
 
diff --git a/routers/user/setting/security_u2f.go b/routers/user/setting/security_u2f.go
index 8140c3c04a..040af34b5b 100644
--- a/routers/user/setting/security_u2f.go
+++ b/routers/user/setting/security_u2f.go
@@ -6,6 +6,7 @@ package setting
 
 import (
 	"errors"
+	"net/http"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
@@ -21,7 +22,7 @@ import (
 func U2FRegister(ctx *context.Context) {
 	form := web.GetForm(ctx).(*auth.U2FRegistrationForm)
 	if form.Name == "" {
-		ctx.Error(409)
+		ctx.Error(http.StatusConflict)
 		return
 	}
 	challenge, err := u2f.NewChallenge(setting.U2F.AppID, setting.U2F.TrustedFacets)
@@ -40,7 +41,7 @@ func U2FRegister(ctx *context.Context) {
 	}
 	for _, reg := range regs {
 		if reg.Name == form.Name {
-			ctx.Error(409, "Name already taken")
+			ctx.Error(http.StatusConflict, "Name already taken")
 			return
 		}
 	}
@@ -53,7 +54,7 @@ func U2FRegister(ctx *context.Context) {
 		// we'll tolerate errors here as they *should* get saved elsewhere
 		log.Error("Unable to save changes to the session: %v", err)
 	}
-	ctx.JSON(200, u2f.NewWebRegisterRequest(challenge, regs.ToRegistrations()))
+	ctx.JSON(http.StatusOK, u2f.NewWebRegisterRequest(challenge, regs.ToRegistrations()))
 }
 
 // U2FRegisterPost receives the response of the security key
@@ -104,7 +105,7 @@ func U2FDelete(ctx *context.Context) {
 		ctx.ServerError("DeleteRegistration", err)
 		return
 	}
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"redirect": setting.AppSubURL + "/user/settings/security",
 	})
 }
diff --git a/routers/user/task.go b/routers/user/task.go
index a88257ee50..b8df5d99c7 100644
--- a/routers/user/task.go
+++ b/routers/user/task.go
@@ -5,6 +5,8 @@
 package user
 
 import (
+	"net/http"
+
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 )
@@ -13,13 +15,13 @@ import (
 func TaskStatus(ctx *context.Context) {
 	task, opts, err := models.GetMigratingTaskByID(ctx.ParamsInt64("task"), ctx.User.ID)
 	if err != nil {
-		ctx.JSON(500, map[string]interface{}{
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
 			"err": err,
 		})
 		return
 	}
 
-	ctx.JSON(200, map[string]interface{}{
+	ctx.JSON(http.StatusOK, map[string]interface{}{
 		"status":    task.Status,
 		"err":       task.Errors,
 		"repo-id":   task.RepoID,