115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package common
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import (
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"fmt"
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"net/http"
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"strings"
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/web/routing"
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"github.com/chi-middleware/proxy"
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chi "github.com/go-chi/chi/v5"
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)
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// Middlewares returns common middlewares
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func Middlewares() []func(http.Handler) http.Handler {
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handlers := []func(http.Handler) http.Handler{
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func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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// First of all escape the URL RawPath to ensure that all routing is done using a correctly escaped URL
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req.URL.RawPath = req.URL.EscapedPath()
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ctx, _, finished := process.GetManager().AddTypedContext(req.Context(), fmt.Sprintf("%s: %s", req.Method, req.RequestURI), process.RequestProcessType, true)
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defer finished()
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next.ServeHTTP(context.NewResponse(resp), req.WithContext(cache.WithCacheContext(ctx)))
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})
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},
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}
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if setting.ReverseProxyLimit > 0 {
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opt := proxy.NewForwardedHeadersOptions().
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WithForwardLimit(setting.ReverseProxyLimit).
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ClearTrustedProxies()
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for _, n := range setting.ReverseProxyTrustedProxies {
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if !strings.Contains(n, "/") {
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opt.AddTrustedProxy(n)
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} else {
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opt.AddTrustedNetwork(n)
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}
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}
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handlers = append(handlers, proxy.ForwardedHeaders(opt))
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}
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// Strip slashes.
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handlers = append(handlers, stripSlashesMiddleware)
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if !setting.Log.DisableRouterLog {
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handlers = append(handlers, routing.NewLoggerHandler())
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}
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if setting.Log.EnableAccessLog {
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handlers = append(handlers, context.AccessLogger())
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}
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handlers = append(handlers, func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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// Why we need this? The Recovery() will try to render a beautiful
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// error page for user, but the process can still panic again, and other
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// middleware like session also may panic then we have to recover twice
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// and send a simple error page that should not panic anymore.
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defer func() {
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if err := recover(); err != nil {
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routing.UpdatePanicError(req.Context(), err)
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combinedErr := fmt.Sprintf("PANIC: %v\n%s", err, log.Stack(2))
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log.Error("%v", combinedErr)
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if setting.IsProd {
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http.Error(resp, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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} else {
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http.Error(resp, combinedErr, http.StatusInternalServerError)
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}
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}
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}()
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next.ServeHTTP(resp, req)
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})
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})
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return handlers
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}
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func stripSlashesMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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var urlPath string
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rctx := chi.RouteContext(req.Context())
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if rctx != nil && rctx.RoutePath != "" {
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urlPath = rctx.RoutePath
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} else if req.URL.RawPath != "" {
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urlPath = req.URL.RawPath
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} else {
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urlPath = req.URL.Path
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}
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sanitizedPath := &strings.Builder{}
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prevWasSlash := false
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for _, chr := range strings.TrimRight(urlPath, "/") {
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if chr != '/' || !prevWasSlash {
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sanitizedPath.WriteRune(chr)
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}
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prevWasSlash = chr == '/'
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}
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if rctx == nil {
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req.URL.Path = sanitizedPath.String()
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} else {
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rctx.RoutePath = sanitizedPath.String()
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}
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next.ServeHTTP(resp, req)
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})
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}
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