Add app engine app to mirror html docs from chromium.googlesource.com

doc/appengine/main.go

Index: doc/appengine/main.go
diff --git a/doc/appengine/main.go b/doc/appengine/main.go
new file mode 100755
index 0000000000000000000000000000000000000000..3e1877231a990dd511a3276800749e0beb0e1d5a
--- /dev/null
+++ b/doc/appengine/main.go
@@ -0,0 +1,55 @@
+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package crashpad mirrors crashpad documentation from Chromium’s git repo.
+package crashpad
+
+import (
+	"io"
+	"net/http"
+	"path"
+	"strings"
+
+	"google.golang.org/appengine"
+	"google.golang.org/appengine/urlfetch"
+)
+
+const baseURL = "http://docs.crashpad.googlecode.com/git"
+
+func init() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		ctx := appengine.NewContext(r)
+		client := urlfetch.Client(ctx)
+
+		// Don’t show dotfiles.
+		if strings.HasPrefix(path.Base(r.URL.Path), ".") {
+			http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+			return
+		}
+
+		if r.URL.Path == "/" {
+			http.Redirect(w, r, "/index.html", http.StatusFound)
+			return
+		}
+
+		resp, err := client.Get(baseURL + r.URL.Path)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		defer resp.Body.Close()
+		w.Header().Set("Content-Type", resp.Header.Get("Content-Type"))

[Mark Mentovai, 2015/10/08 19:07:09]

We have .html, .css, .js, and .png. Does this set the right Content-Type for all
of these?

+		io.Copy(w, resp.Body)
+	})
+}