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a2740b23a2
BUG=crashpad:67 R=mark@chromium.org, rsesek@chromium.org Review URL: https://codereview.chromium.org/1393353002 . Patch from Andrew Bonventre <andybons@chromium.org>.
123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package crashpad mirrors crashpad documentation from Chromium’s git repo.
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package crashpad
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import (
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"encoding/base64"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"path"
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"strings"
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"time"
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"google.golang.org/appengine"
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"google.golang.org/appengine/memcache"
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"google.golang.org/appengine/urlfetch"
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)
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const baseURL = "https://chromium.googlesource.com/crashpad/crashpad/+/doc/doc/generated/?format=TEXT"
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func init() {
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http.HandleFunc("/", handler)
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}
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func handler(w http.ResponseWriter, r *http.Request) {
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ctx := appengine.NewContext(r)
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client := urlfetch.Client(ctx)
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// Don’t show dotfiles.
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if strings.HasPrefix(path.Base(r.URL.Path), ".") {
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http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
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return
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}
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u, err := url.Parse(baseURL)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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u.Path = path.Join(u.Path, r.URL.Path)
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urlStr := u.String()
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item, err := memcache.Get(ctx, urlStr)
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if err == memcache.ErrCacheMiss {
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resp, err := client.Get(urlStr)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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w.WriteHeader(resp.StatusCode)
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for k, v := range w.Header() {
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w.Header()[k] = v
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}
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io.Copy(w, resp.Body)
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return
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}
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// Redirect directories to their index pages (/doc/ -> /doc/index.html).
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if resp.Header.Get("X-Gitiles-Object-Type") == "tree" {
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http.Redirect(w, r, path.Join(r.URL.Path, "/index.html"), http.StatusFound)
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return
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}
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decoder := base64.NewDecoder(base64.StdEncoding, resp.Body)
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b, err := ioutil.ReadAll(decoder)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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item = &memcache.Item{
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Key: urlStr,
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Value: b,
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Expiration: 1 * time.Hour,
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}
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if err := memcache.Set(ctx, item); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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} else if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", contentType(path.Base(u.Path)))
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fmt.Fprintf(w, "%s", item.Value)
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}
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// contentType returns the appropriate content type header for file.
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func contentType(file string) string {
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contentTypes := map[string]string{
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".html": "text/html; charset=UTF-8",
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".css": "text/css; charset=UTF-8",
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".js": "text/javascript; charset=UTF-8",
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".png": "image/png",
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".ico": "image/x-icon",
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}
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for suffix, typ := range contentTypes {
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if strings.HasSuffix(file, suffix) {
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return typ
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}
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}
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return "text/plain; charset=UTF-8"
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}
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