mirror of https://github.com/perkeep/perkeep.git
106 lines
2.8 KiB
Go
106 lines
2.8 KiB
Go
/*
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Copyright 2011 Google Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"fmt"
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"http"
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"json"
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"os"
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"path/filepath"
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"regexp"
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"camli/jsonconfig"
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)
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var staticFilePattern = regexp.MustCompile(`/static/([a-zA-Z0-9\-\_]+\.(html|js|css|png|jpg|gif))$`)
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var identPattern = regexp.MustCompile(`^[a-zA-Z\_]+$`)
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// UIHandler handles serving the UI and discovery JSON.
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type UIHandler struct {
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// URL prefixes (path or full URL) to the primary blob and
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// search root. Only used by the UI and thus necessary if UI
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// is true.
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BlobRoot string
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SearchRoot string
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JSONSignRoot string
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FilesDir string
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}
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func defaultFilesDir() string {
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dir, _ := filepath.Split(os.Args[0])
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return filepath.Join(dir, "ui")
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}
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func createUIHandler(conf jsonconfig.Obj) (h http.Handler, err os.Error) {
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ui := &UIHandler{}
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ui.BlobRoot = conf.OptionalString("blobRoot", "")
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ui.SearchRoot = conf.OptionalString("searchRoot", "")
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ui.JSONSignRoot = conf.OptionalString("jsonSignRoot", "")
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ui.FilesDir = conf.OptionalString("staticFiles", defaultFilesDir())
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if err = conf.Validate(); err != nil {
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return
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}
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fi, sterr := os.Stat(ui.FilesDir)
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if sterr != nil || !fi.IsDirectory() {
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err = fmt.Errorf("UI handler's \"staticFiles\" of %q is invalid", ui.FilesDir)
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return
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}
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return ui, nil
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}
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func wantsDiscovery(req *http.Request) bool {
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return req.Method == "GET" &&
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(req.Header.Get("Accept") == "text/x-camli-configuration" ||
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req.FormValue("camli.mode") == "config")
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}
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func (ui *UIHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("Vary", "Accept")
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switch {
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case wantsDiscovery(req):
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ui.serveDiscovery(rw, req)
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default:
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file := ""
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if m := staticFilePattern.FindStringSubmatch(req.URL.Path); m != nil {
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file = m[1]
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} else {
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file = "index.html"
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}
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http.ServeFile(rw, req, filepath.Join(ui.FilesDir, file))
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}
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}
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func (ui *UIHandler) serveDiscovery(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("Content-Type", "text/javascript")
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inCb := false
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if cb := req.FormValue("cb"); identPattern.MatchString(cb) {
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fmt.Fprintf(rw, "%s(", cb)
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inCb = true
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}
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bytes, _ := json.Marshal(map[string]interface{}{
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"blobRoot": ui.BlobRoot,
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"searchRoot": ui.SearchRoot,
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"jsonSignRoot": ui.JSONSignRoot,
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})
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rw.Write(bytes)
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if inCb {
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rw.Write([]byte{')'})
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}
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}
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