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// Copyright 2021 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 common
import (
"fmt"
"net/http"
"strings"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/chi-middleware/proxy"
"github.com/go-chi/chi/middleware"
)
// Middlewares returns common middlewares
func Middlewares() []func(http.Handler) http.Handler {
var handlers = []func(http.Handler) http.Handler{
func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
next.ServeHTTP(context.NewResponse(resp), req)
})
},
}
if setting.ReverseProxyLimit > 0 {
opt := proxy.NewForwardedHeadersOptions().
WithForwardLimit(setting.ReverseProxyLimit).
ClearTrustedProxies()
for _, n := range setting.ReverseProxyTrustedProxies {
if !strings.Contains(n, "/") {
opt.AddTrustedProxy(n)
} else {
opt.AddTrustedNetwork(n)
}
}
handlers = append(handlers, proxy.ForwardedHeaders(opt))
}
handlers = append(handlers, middleware.StripSlashes)
if !setting.DisableRouterLog && setting.RouterLogLevel != log.NONE {
if log.GetLogger("router").GetLevel() <= setting.RouterLogLevel {
handlers = append(handlers, LoggerHandler(setting.RouterLogLevel))
}
}
if setting.EnableAccessLog {
handlers = append(handlers, context.AccessLogger())
}
handlers = append(handlers, func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
// Why we need this? The Recovery() will try to render a beautiful
// error page for user, but the process can still panic again, and other
// middleware like session also may panic then we have to recover twice
// and send a simple error page that should not panic any more.
defer func() {
if err := recover(); err != nil {
combinedErr := fmt.Sprintf("PANIC: %v\n%s", err, string(log.Stack(2)))
log.Error("%v", combinedErr)
if setting.IsProd {
http.Error(resp, http.StatusText(500), 500)
} else {
http.Error(resp, combinedErr, 500)
}
}
}()
next.ServeHTTP(resp, req)
})
})
return handlers
}
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