code.gitea.io/gitea@v1.21.7/routers/common/errpage.go (about)

     1  // Copyright 2023 The Gitea Authors. All rights reserved.
     2  // SPDX-License-Identifier: MIT
     3  
     4  package common
     5  
     6  import (
     7  	"fmt"
     8  	"net/http"
     9  
    10  	user_model "code.gitea.io/gitea/models/user"
    11  	"code.gitea.io/gitea/modules/base"
    12  	"code.gitea.io/gitea/modules/context"
    13  	"code.gitea.io/gitea/modules/httpcache"
    14  	"code.gitea.io/gitea/modules/log"
    15  	"code.gitea.io/gitea/modules/setting"
    16  	"code.gitea.io/gitea/modules/templates"
    17  	"code.gitea.io/gitea/modules/web/middleware"
    18  	"code.gitea.io/gitea/modules/web/routing"
    19  )
    20  
    21  const tplStatus500 base.TplName = "status/500"
    22  
    23  // RenderPanicErrorPage renders a 500 page, and it never panics
    24  func RenderPanicErrorPage(w http.ResponseWriter, req *http.Request, err any) {
    25  	combinedErr := fmt.Sprintf("%v\n%s", err, log.Stack(2))
    26  	log.Error("PANIC: %s", combinedErr)
    27  
    28  	defer func() {
    29  		if err := recover(); err != nil {
    30  			log.Error("Panic occurs again when rendering error page: %v. Stack:\n%s", err, log.Stack(2))
    31  		}
    32  	}()
    33  
    34  	routing.UpdatePanicError(req.Context(), err)
    35  
    36  	httpcache.SetCacheControlInHeader(w.Header(), 0, "no-transform")
    37  	w.Header().Set(`X-Frame-Options`, setting.CORSConfig.XFrameOptions)
    38  
    39  	tmplCtx := context.TemplateContext{}
    40  	tmplCtx["Locale"] = middleware.Locale(w, req)
    41  	ctxData := middleware.GetContextData(req.Context())
    42  
    43  	// This recovery handler could be called without Gitea's web context, so we shouldn't touch that context too much.
    44  	// Otherwise, the 500-page may cause new panics, eg: cache.GetContextWithData, it makes the developer&users couldn't find the original panic.
    45  	user, _ := ctxData[middleware.ContextDataKeySignedUser].(*user_model.User)
    46  	if !setting.IsProd || (user != nil && user.IsAdmin) {
    47  		ctxData["ErrorMsg"] = "PANIC: " + combinedErr
    48  	}
    49  
    50  	err = templates.HTMLRenderer().HTML(w, http.StatusInternalServerError, string(tplStatus500), ctxData, tmplCtx)
    51  	if err != nil {
    52  		log.Error("Error occurs again when rendering error page: %v", err)
    53  		w.WriteHeader(http.StatusInternalServerError)
    54  		_, _ = w.Write([]byte("Internal server error, please collect error logs and report to Gitea issue tracker"))
    55  	}
    56  }