mirror of
https://github.com/go-gitea/gitea
synced 2024-11-09 11:44:27 +00:00
7b79be24ca
storageHandler() is written as a middleware but is used as an endpoint handler, and thus `next` is actually `nil`, which causes a null pointer dereference when a request URL does not match the pattern (where it calls `next.ServerHTTP()`). Example CURL command to trigger the panic: ``` curl -I "http://yourhost/gitea//avatars/a" ``` Fixes #27409 --- Note: the diff looks big but it's actually a small change - all I did was to remove the outer closure (and one level of indentation) ~and removed the HTTP method and pattern checks as they seem redundant because go-chi already does those checks~. You might want to check "Hide whitespace" when reviewing it. Alternative solution (a bit simpler): append `, misc.DummyOK` to the route declarations that utilize `storageHandler()` - this makes it return an empty response when the URL is invalid. I've tested this one and it works too. Or maybe it would be better to return a 400 error in that case (?)
99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package web
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"os"
|
|
"path"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/httpcache"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/storage"
|
|
"code.gitea.io/gitea/modules/util"
|
|
"code.gitea.io/gitea/modules/web/routing"
|
|
)
|
|
|
|
func storageHandler(storageSetting *setting.Storage, prefix string, objStore storage.ObjectStorage) http.HandlerFunc {
|
|
prefix = strings.Trim(prefix, "/")
|
|
funcInfo := routing.GetFuncInfo(storageHandler, prefix)
|
|
|
|
if storageSetting.MinioConfig.ServeDirect {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
if req.Method != "GET" && req.Method != "HEAD" {
|
|
http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
|
|
return
|
|
}
|
|
|
|
if !strings.HasPrefix(req.URL.Path, "/"+prefix+"/") {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
routing.UpdateFuncInfo(req.Context(), funcInfo)
|
|
|
|
rPath := strings.TrimPrefix(req.URL.Path, "/"+prefix+"/")
|
|
rPath = util.PathJoinRelX(rPath)
|
|
|
|
u, err := objStore.URL(rPath, path.Base(rPath))
|
|
if err != nil {
|
|
if os.IsNotExist(err) || errors.Is(err, os.ErrNotExist) {
|
|
log.Warn("Unable to find %s %s", prefix, rPath)
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
log.Error("Error whilst getting URL for %s %s. Error: %v", prefix, rPath, err)
|
|
http.Error(w, fmt.Sprintf("Error whilst getting URL for %s %s", prefix, rPath), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
http.Redirect(w, req, u.String(), http.StatusTemporaryRedirect)
|
|
})
|
|
}
|
|
|
|
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
if req.Method != "GET" && req.Method != "HEAD" {
|
|
http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
|
|
return
|
|
}
|
|
|
|
if !strings.HasPrefix(req.URL.Path, "/"+prefix+"/") {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
routing.UpdateFuncInfo(req.Context(), funcInfo)
|
|
|
|
rPath := strings.TrimPrefix(req.URL.Path, "/"+prefix+"/")
|
|
rPath = util.PathJoinRelX(rPath)
|
|
if rPath == "" || rPath == "." {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
|
|
fi, err := objStore.Stat(rPath)
|
|
if err != nil {
|
|
if os.IsNotExist(err) || errors.Is(err, os.ErrNotExist) {
|
|
log.Warn("Unable to find %s %s", prefix, rPath)
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
log.Error("Error whilst opening %s %s. Error: %v", prefix, rPath, err)
|
|
http.Error(w, fmt.Sprintf("Error whilst opening %s %s", prefix, rPath), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
fr, err := objStore.Open(rPath)
|
|
if err != nil {
|
|
log.Error("Error whilst opening %s %s. Error: %v", prefix, rPath, err)
|
|
http.Error(w, fmt.Sprintf("Error whilst opening %s %s", prefix, rPath), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
defer fr.Close()
|
|
httpcache.ServeContentWithCacheControl(w, req, path.Base(rPath), fi.ModTime(), fr)
|
|
})
|
|
}
|