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Use standard HTTP library to serve files (#24693)

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`http.ServeFile/ServeContent` handles `If-xxx`, `Content-Length`,
`Range` and `Etag` correctly

After this PR, storage files (eg: avatar) could be responded with
correct Content-Length.
This commit is contained in:
wxiaoguang 2023-05-13 22:04:57 +08:00 committed by GitHub
parent f745016092
commit a94a8d0ab1
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 22 additions and 157 deletions
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4
modules/context/context_test.go
View file

@ -5,16 +5,16 @@ package context
import (
"net/http"
"net/http/httptest"
"testing"
"code.gitea.io/gitea/modules/httplib"
"code.gitea.io/gitea/modules/setting"
"github.com/stretchr/testify/assert"
)
func TestRemoveSessionCookieHeader(t *testing.T) {
w := httplib.NewMockResponseWriter()
w := httptest.NewRecorder()
w.Header().Add("Set-Cookie", (&http.Cookie{Name: setting.SessionConfig.CookieName, Value: "foo"}).String())
w.Header().Add("Set-Cookie", (&http.Cookie{Name: "other", Value: "bar"}).String())
assert.Len(t, w.Header().Values("Set-Cookie"), 2)

37
modules/httpcache/httpcache.go
View file

@ -4,10 +4,8 @@
package httpcache
import (
"encoding/base64"
"fmt"
"io"
"net/http"
"os"
"strconv"
"strings"
"time"
@ -37,38 +35,9 @@ func SetCacheControlInHeader(h http.Header, maxAge time.Duration, additionalDire
h.Set("Cache-Control", strings.Join(append(directives, additionalDirectives...), ", "))
}
// generateETag generates an ETag based on size, filename and file modification time
func generateETag(fi os.FileInfo) string {
etag := fmt.Sprint(fi.Size()) + fi.Name() + fi.ModTime().UTC().Format(http.TimeFormat)
return `"` + base64.StdEncoding.EncodeToString([]byte(etag)) + `"`
}
// HandleTimeCache handles time-based caching for a HTTP request
func HandleTimeCache(req *http.Request, w http.ResponseWriter, fi os.FileInfo) (handled bool) {
return HandleGenericTimeCache(req, w, fi.ModTime())
}
// HandleGenericTimeCache handles time-based caching for a HTTP request
func HandleGenericTimeCache(req *http.Request, w http.ResponseWriter, lastModified time.Time) (handled bool) {
func ServeContentWithCacheControl(w http.ResponseWriter, req *http.Request, name string, modTime time.Time, content io.ReadSeeker) {
SetCacheControlInHeader(w.Header(), setting.StaticCacheTime)
ifModifiedSince := req.Header.Get("If-Modified-Since")
if ifModifiedSince != "" {
t, err := time.Parse(http.TimeFormat, ifModifiedSince)
if err == nil && lastModified.Unix() <= t.Unix() {
w.WriteHeader(http.StatusNotModified)
return true
}
}
w.Header().Set("Last-Modified", lastModified.Format(http.TimeFormat))
return false
}
// HandleFileETagCache handles ETag-based caching for a HTTP request
func HandleFileETagCache(req *http.Request, w http.ResponseWriter, fi os.FileInfo) (handled bool) {
etag := generateETag(fi)
return HandleGenericETagCache(req, w, etag)
http.ServeContent(w, req, name, modTime, content)
}
// HandleGenericETagCache handles ETag-based caching for a HTTP request.

57
modules/httpcache/httpcache_test.go
View file

@ -6,23 +6,12 @@ package httpcache
import (
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type mockFileInfo struct{}
func (m mockFileInfo) Name() string { return "gitea.test" }
func (m mockFileInfo) Size() int64 { return int64(10) }
func (m mockFileInfo) Mode() os.FileMode { return os.ModePerm }
func (m mockFileInfo) ModTime() time.Time { return time.Time{} }
func (m mockFileInfo) IsDir() bool { return false }
func (m mockFileInfo) Sys() interface{} { return nil }
func countFormalHeaders(h http.Header) (c int) {
for k := range h {
// ignore our headers for internal usage
@ -34,52 +23,6 @@ func countFormalHeaders(h http.Header) (c int) {
return c
}
func TestHandleFileETagCache(t *testing.T) {
fi := mockFileInfo{}
etag := `"MTBnaXRlYS50ZXN0TW9uLCAwMSBKYW4gMDAwMSAwMDowMDowMCBHTVQ="`
t.Run("No_If-None-Match", func(t *testing.T) {
req := &http.Request{Header: make(http.Header)}
w := httptest.NewRecorder()
handled := HandleFileETagCache(req, w, fi)
assert.False(t, handled)
assert.Equal(t, 2, countFormalHeaders(w.Header()))
assert.Contains(t, w.Header(), "Cache-Control")
assert.Contains(t, w.Header(), "Etag")
assert.Equal(t, etag, w.Header().Get("Etag"))
})
t.Run("Wrong_If-None-Match", func(t *testing.T) {
req := &http.Request{Header: make(http.Header)}
w := httptest.NewRecorder()
req.Header.Set("If-None-Match", `"wrong etag"`)
handled := HandleFileETagCache(req, w, fi)
assert.False(t, handled)
assert.Equal(t, 2, countFormalHeaders(w.Header()))
assert.Contains(t, w.Header(), "Cache-Control")
assert.Contains(t, w.Header(), "Etag")
assert.Equal(t, etag, w.Header().Get("Etag"))
})
t.Run("Correct_If-None-Match", func(t *testing.T) {
req := &http.Request{Header: make(http.Header)}
w := httptest.NewRecorder()
req.Header.Set("If-None-Match", etag)
handled := HandleFileETagCache(req, w, fi)
assert.True(t, handled)
assert.Equal(t, 1, countFormalHeaders(w.Header()))
assert.Contains(t, w.Header(), "Etag")
assert.Equal(t, etag, w.Header().Get("Etag"))
assert.Equal(t, http.StatusNotModified, w.Code)
})
}
func TestHandleGenericETagCache(t *testing.T) {
etag := `"test"`

35
modules/httplib/mock.go
View file

@ -1,35 +0,0 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package httplib
import (
"bytes"
"net/http"
)
type MockResponseWriter struct {
header http.Header
StatusCode int
BodyBuffer bytes.Buffer
}
func (m *MockResponseWriter) Header() http.Header {
return m.header
}
func (m *MockResponseWriter) Write(bytes []byte) (int, error) {
if m.StatusCode == 0 {
m.StatusCode = http.StatusOK
}
return m.BodyBuffer.Write(bytes)
}
func (m *MockResponseWriter) WriteHeader(statusCode int) {
m.StatusCode = statusCode
}
func NewMockResponseWriter() *MockResponseWriter {
return &MockResponseWriter{header: http.Header{}}
}

13
modules/httplib/serve_test.go
View file

@ -6,6 +6,7 @@ package httplib
import (
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"os"
"strings"
@ -25,12 +26,12 @@ func TestServeContentByReader(t *testing.T) {
r.Header.Set("Range", fmt.Sprintf("bytes=%s", rangeStr))
}
reader := strings.NewReader(data)
w := NewMockResponseWriter()
w := httptest.NewRecorder()
ServeContentByReader(r, w, "test", int64(len(data)), reader)
assert.Equal(t, expectedStatusCode, w.StatusCode)
assert.Equal(t, expectedStatusCode, w.Code)
if expectedStatusCode == http.StatusPartialContent || expectedStatusCode == http.StatusOK {
assert.Equal(t, fmt.Sprint(len(expectedContent)), w.Header().Get("Content-Length"))
assert.Equal(t, expectedContent, w.BodyBuffer.String())
assert.Equal(t, expectedContent, w.Body.String())
}
}
@ -76,12 +77,12 @@ func TestServeContentByReadSeeker(t *testing.T) {
}
defer seekReader.Close()
w := NewMockResponseWriter()
w := httptest.NewRecorder()
ServeContentByReadSeeker(r, w, "test", time.Time{}, seekReader)
assert.Equal(t, expectedStatusCode, w.StatusCode)
assert.Equal(t, expectedStatusCode, w.Code)
if expectedStatusCode == http.StatusPartialContent || expectedStatusCode == http.StatusOK {
assert.Equal(t, fmt.Sprint(len(expectedContent)), w.Header().Get("Content-Length"))
assert.Equal(t, expectedContent, w.BodyBuffer.String())
assert.Equal(t, expectedContent, w.Body.String())
}
}

8
modules/public/public.go
View file

@ -97,10 +97,6 @@ func handleRequest(w http.ResponseWriter, req *http.Request, fs http.FileSystem,
return true
}
if httpcache.HandleFileETagCache(req, w, fi) {
return true
}
serveContent(w, req, fi, fi.ModTime(), f)
return true
}
@ -124,11 +120,11 @@ func serveContent(w http.ResponseWriter, req *http.Request, fi os.FileInfo, modt
w.Header().Set("Content-Type", "application/octet-stream")
}
w.Header().Set("Content-Encoding", "gzip")
http.ServeContent(w, req, fi.Name(), modtime, rdGzip)
httpcache.ServeContentWithCacheControl(w, req, fi.Name(), modtime, rdGzip)
return
}
}
http.ServeContent(w, req, fi.Name(), modtime, content)
httpcache.ServeContentWithCacheControl(w, req, fi.Name(), modtime, content)
return
}

16
routers/web/base.go
View file

@ -6,7 +6,6 @@ package web
import (
"errors"
"fmt"
"io"
"net/http"
"os"
"path"
@ -76,12 +75,6 @@ func storageHandler(storageSetting setting.Storage, prefix string, objStore stor
}
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)
@ -92,14 +85,15 @@ func storageHandler(storageSetting setting.Storage, prefix string, objStore stor
http.Error(w, fmt.Sprintf("Error whilst opening %s %s", prefix, rPath), http.StatusInternalServerError)
return
}
defer fr.Close()
_, err = io.Copy(w, fr)
fr, err := objStore.Open(rPath)
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), http.StatusInternalServerError)
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)
})
}
}

9
routers/web/misc/misc.go
View file

@ -5,13 +5,13 @@ package misc
import (
"net/http"
"os"
"path"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/httpcache"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
)
func SSHInfo(rw http.ResponseWriter, req *http.Request) {
@ -34,11 +34,8 @@ func DummyOK(w http.ResponseWriter, req *http.Request) {
}
func RobotsTxt(w http.ResponseWriter, req *http.Request) {
filePath := path.Join(setting.CustomPath, "robots.txt")
fi, err := os.Stat(filePath)
if err == nil && httpcache.HandleTimeCache(req, w, fi) {
return
}
filePath := util.FilePathJoinAbs(setting.CustomPath, "robots.txt")
httpcache.SetCacheControlInHeader(w.Header(), setting.StaticCacheTime)
http.ServeFile(w, req, filePath)
}