forgejo/routers/routes/base.go
zeripath 17c5c654a5
Prevent double-login for Git HTTP and LFS and simplify login (#15303)
* Prevent double-login for Git HTTP and LFS and simplify login

There are a number of inconsistencies with our current methods for
logging in for git and lfs. The first is that there is a double login
process. This is particularly evident in 1.13 where there are no less
than 4 hash checks for basic authentication due to the previous
IsPasswordSet behaviour.

This duplicated code had individual inconsistencies that were not
helpful and caused confusion.

This PR does the following:

* Remove the specific login code from the git and lfs handlers except
for the lfs special bearer token
* Simplify the meaning of DisableBasicAuthentication to allow Token and
Oauth2 sign-in.
* The removal of the specific code from git and lfs means that these
both now have the same login semantics and can - if not
DisableBasicAuthentication - login from external services. Further it
allows Oauth2 token authentication as per our standard mechanisms.
* The change in the recovery handler prevents the service from
re-attempting to login - primarily because this could easily cause a
further panic and it is wasteful.

* add test

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Andrew Thornton <art27@cantab.net>
2021-05-15 17:32:09 +02:00

215 lines
6 KiB
Go

// Copyright 2020 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 routes
import (
"errors"
"fmt"
"io"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth/sso"
"code.gitea.io/gitea/modules/context"
"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/templates"
"code.gitea.io/gitea/modules/web/middleware"
"gitea.com/go-chi/session"
)
// LoggerHandler is a handler that will log the routing to the default gitea log
func LoggerHandler(level log.Level) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
start := time.Now()
_ = log.GetLogger("router").Log(0, level, "Started %s %s for %s", log.ColoredMethod(req.Method), req.URL.RequestURI(), req.RemoteAddr)
next.ServeHTTP(w, req)
var status int
if v, ok := w.(context.ResponseWriter); ok {
status = v.Status()
}
_ = log.GetLogger("router").Log(0, level, "Completed %s %s %v %s in %v", log.ColoredMethod(req.Method), req.URL.RequestURI(), log.ColoredStatus(status), log.ColoredStatus(status, http.StatusText(status)), log.ColoredTime(time.Since(start)))
})
}
}
func storageHandler(storageSetting setting.Storage, prefix string, objStore storage.ObjectStorage) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
if storageSetting.ServeDirect {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.Method != "GET" && req.Method != "HEAD" {
next.ServeHTTP(w, req)
return
}
if !strings.HasPrefix(req.URL.RequestURI(), "/"+prefix) {
next.ServeHTTP(w, req)
return
}
rPath := strings.TrimPrefix(req.URL.RequestURI(), "/"+prefix)
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, "file not found", 404)
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), 500)
return
}
http.Redirect(
w,
req,
u.String(),
301,
)
})
}
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.Method != "GET" && req.Method != "HEAD" {
next.ServeHTTP(w, req)
return
}
prefix := strings.Trim(prefix, "/")
if !strings.HasPrefix(req.URL.EscapedPath(), "/"+prefix+"/") {
next.ServeHTTP(w, req)
return
}
rPath := strings.TrimPrefix(req.URL.EscapedPath(), "/"+prefix+"/")
rPath = strings.TrimPrefix(rPath, "/")
if rPath == "" {
http.Error(w, "file not found", 404)
return
}
rPath = path.Clean("/" + filepath.ToSlash(rPath))
rPath = rPath[1:]
fi, err := objStore.Stat(rPath)
if err == nil && httpcache.HandleTimeCache(req, w, fi) {
return
}
//If we have matched and access to release or issue
fr, err := objStore.Open(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, "file not found", 404)
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), 500)
return
}
defer fr.Close()
_, err = io.Copy(w, fr)
if err != nil {
log.Error("Error whilst rendering %s %s. Error: %v", prefix, rPath, err)
http.Error(w, fmt.Sprintf("Error whilst rendering %s %s", prefix, rPath), 500)
return
}
})
}
}
type dataStore struct {
Data map[string]interface{}
}
func (d *dataStore) GetData() map[string]interface{} {
return d.Data
}
// Recovery returns a middleware that recovers from any panics and writes a 500 and a log if so.
// This error will be created with the gitea 500 page.
func Recovery() func(next http.Handler) http.Handler {
var rnd = templates.HTMLRenderer()
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
defer func() {
if err := recover(); err != nil {
combinedErr := fmt.Sprintf("PANIC: %v\n%s", err, string(log.Stack(2)))
log.Error("%v", combinedErr)
sessionStore := session.GetSession(req)
if sessionStore == nil {
if setting.IsProd() {
http.Error(w, http.StatusText(500), 500)
} else {
http.Error(w, combinedErr, 500)
}
return
}
var lc = middleware.Locale(w, req)
var store = dataStore{
Data: templates.Vars{
"Language": lc.Language(),
"CurrentURL": setting.AppSubURL + req.URL.RequestURI(),
"i18n": lc,
},
}
var user *models.User
if apiContext := context.GetAPIContext(req); apiContext != nil {
user = apiContext.User
}
if user == nil {
if ctx := context.GetContext(req); ctx != nil {
user = ctx.User
}
}
if user == nil {
// Get user from session if logged in - do not attempt to sign-in
user = sso.SessionUser(sessionStore)
}
if user != nil {
store.Data["IsSigned"] = true
store.Data["SignedUser"] = user
store.Data["SignedUserID"] = user.ID
store.Data["SignedUserName"] = user.Name
store.Data["IsAdmin"] = user.IsAdmin
} else {
store.Data["SignedUserID"] = int64(0)
store.Data["SignedUserName"] = ""
}
w.Header().Set(`X-Frame-Options`, `SAMEORIGIN`)
if !setting.IsProd() {
store.Data["ErrorMsg"] = combinedErr
}
err = rnd.HTML(w, 500, "status/500", templates.BaseVars().Merge(store.Data))
if err != nil {
log.Error("%v", err)
}
}
}()
next.ServeHTTP(w, req)
})
}
}