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// Copyright 2016 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package context
import (
"fmt"
"net/url"
"strings"
"github.com/go-macaron/csrf"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"gopkg.in/macaron.v1"
)
// APIContext is a specific macaron context for API service
type APIContext struct {
*Context
Org *APIOrganization
}
// APIError is error format response
// swagger:response error
type APIError struct {
Message string `json:"message"`
URL string `json:"url"`
}
// APIValidationError is error format response related to input validation
// swagger:response validationError
type APIValidationError struct {
Message string `json:"message"`
URL string `json:"url"`
}
//APIEmpty is an empty response
// swagger:response empty
type APIEmpty struct{}
//APIForbiddenError is a forbidden error response
// swagger:response forbidden
type APIForbiddenError struct {
APIError
}
//APINotFound is a not found empty response
// swagger:response notFound
type APINotFound struct{}
//APIRedirect is a redirect response
// swagger:response redirect
type APIRedirect struct{}
// Error responses error message to client with given message.
// If status is 500, also it prints error to log.
func (ctx *APIContext) Error(status int, title string, obj interface{}) {
var message string
if err, ok := obj.(error); ok {
message = err.Error()
} else {
message = obj.(string)
}
if status == 500 {
log.Error("%s: %s", title, message)
}
ctx.JSON(status, APIError{
Message: message,
URL: setting.API.SwaggerURL,
})
}
func genAPILinks(curURL *url.URL, total, pageSize, curPage int) []string {
page := NewPagination(total, pageSize, curPage, 0)
paginater := page.Paginater
links := make([]string, 0, 4)
if paginater.HasNext() {
u := *curURL
queries := u.Query()
queries.Set("page", fmt.Sprintf("%d", paginater.Next()))
u.RawQuery = queries.Encode()
links = append(links, fmt.Sprintf("<%s%s>; rel=\"next\"", setting.AppURL, u.RequestURI()[1:]))
}
if !paginater.IsLast() {
u := *curURL
queries := u.Query()
queries.Set("page", fmt.Sprintf("%d", paginater.TotalPages()))
u.RawQuery = queries.Encode()
links = append(links, fmt.Sprintf("<%s%s>; rel=\"last\"", setting.AppURL, u.RequestURI()[1:]))
}
if !paginater.IsFirst() {
u := *curURL
queries := u.Query()
queries.Set("page", "1")
u.RawQuery = queries.Encode()
links = append(links, fmt.Sprintf("<%s%s>; rel=\"first\"", setting.AppURL, u.RequestURI()[1:]))
}
if paginater.HasPrevious() {
u := *curURL
queries := u.Query()
queries.Set("page", fmt.Sprintf("%d", paginater.Previous()))
u.RawQuery = queries.Encode()
links = append(links, fmt.Sprintf("<%s%s>; rel=\"prev\"", setting.AppURL, u.RequestURI()[1:]))
}
return links
}
// SetLinkHeader sets pagination link header by given total number and page size.
func (ctx *APIContext) SetLinkHeader(total, pageSize int) {
links := genAPILinks(ctx.Req.URL, total, pageSize, ctx.QueryInt("page"))
if len(links) > 0 {
ctx.Header().Set("Link", strings.Join(links, ","))
}
}
// RequireCSRF requires a validated a CSRF token
func (ctx *APIContext) RequireCSRF() {
headerToken := ctx.Req.Header.Get(ctx.csrf.GetHeaderName())
formValueToken := ctx.Req.FormValue(ctx.csrf.GetFormName())
if len(headerToken) > 0 || len(formValueToken) > 0 {
csrf.Validate(ctx.Context.Context, ctx.csrf)
} else {
ctx.Context.Error(401)
}
}
// CheckForOTP validateds OTP
func (ctx *APIContext) CheckForOTP() {
otpHeader := ctx.Req.Header.Get("X-Gitea-OTP")
twofa, err := models.GetTwoFactorByUID(ctx.Context.User.ID)
if err != nil {
if models.IsErrTwoFactorNotEnrolled(err) {
return // No 2FA enrollment for this user
}
ctx.Context.Error(500)
return
}
ok, err := twofa.ValidateTOTP(otpHeader)
if err != nil {
ctx.Context.Error(500)
return
}
if !ok {
ctx.Context.Error(401)
return
}
}
// APIContexter returns apicontext as macaron middleware
func APIContexter() macaron.Handler {
return func(c *Context) {
ctx := &APIContext{
Context: c,
}
c.Map(ctx)
}
}
// ReferencesGitRepo injects the GitRepo into the Context
func ReferencesGitRepo(allowEmpty bool) macaron.Handler {
return func(ctx *APIContext) {
// Empty repository does not have reference information.
if !allowEmpty && ctx.Repo.Repository.IsEmpty {
return
}
// For API calls.
if ctx.Repo.GitRepo == nil {
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)
return
}
ctx.Repo.GitRepo = gitRepo
}
}
}
// NotFound handles 404s for APIContext
// String will replace message, errors will be added to a slice
func (ctx *APIContext) NotFound(objs ...interface{}) {
var message = "Not Found"
var errors []string
for _, obj := range objs {
if err, ok := obj.(error); ok {
errors = append(errors, err.Error())
} else {
message = obj.(string)
}
}
ctx.JSON(404, map[string]interface{}{
"message": message,
"documentation_url": setting.API.SwaggerURL,
"errors": errors,
})
}
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