mirror of https://github.com/perkeep/perkeep.git
206 lines
5.5 KiB
Go
206 lines
5.5 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 server
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"os/user"
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"sort"
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"sync"
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"time"
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"camlistore.org/pkg/auth"
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"camlistore.org/pkg/blobserver"
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"camlistore.org/pkg/jsonconfig"
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"camlistore.org/pkg/search"
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)
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// RootHandler handles serving the about/splash page.
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type RootHandler struct {
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// Stealth determines whether we hide from non-authenticated
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// clients.
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Stealth bool
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OwnerName string // for display purposes only
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// URL prefixes (path or full URL) to the primary blob and
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// search root.
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BlobRoot string
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SearchRoot string
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statusRoot string
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Storage blobserver.Storage // of BlobRoot, or nil
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searchInitOnce sync.Once // runs searchInit, which populates searchHandler
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searchInit func()
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searchHandler *search.Handler // of SearchRoot, or nil
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ui *UIHandler // or nil, if none configured
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sync []*SyncHandler // list of configured sync handlers, for discovery.
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}
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func (rh *RootHandler) SearchHandler() (h *search.Handler, ok bool) {
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rh.searchInitOnce.Do(rh.searchInit)
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return rh.searchHandler, rh.searchHandler != nil
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}
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func init() {
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blobserver.RegisterHandlerConstructor("root", newRootFromConfig)
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}
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func newRootFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (h http.Handler, err error) {
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u, err := user.Current()
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if err != nil {
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return
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}
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root := &RootHandler{
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BlobRoot: conf.OptionalString("blobRoot", ""),
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SearchRoot: conf.OptionalString("searchRoot", ""),
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OwnerName: conf.OptionalString("ownerName", u.Name),
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}
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root.Stealth = conf.OptionalBool("stealth", false)
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root.statusRoot = conf.OptionalString("statusRoot", "")
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if err = conf.Validate(); err != nil {
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return
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}
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if root.BlobRoot != "" {
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bs, err := ld.GetStorage(root.BlobRoot)
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if err != nil {
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return nil, fmt.Errorf("Root handler's blobRoot of %q error: %v", root.BlobRoot, err)
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}
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root.Storage = bs
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}
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root.searchInit = func() {}
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if root.SearchRoot != "" {
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prefix := root.SearchRoot
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if t := ld.GetHandlerType(prefix); t != "search" {
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if t == "" {
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return nil, fmt.Errorf("root handler's searchRoot of %q is invalid and doesn't refer to a declared handler", prefix)
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}
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return nil, fmt.Errorf("root handler's searchRoot of %q is of type %q, not %q", prefix, t, "search")
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}
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root.searchInit = func() {
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h, err := ld.GetHandler(prefix)
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if err != nil {
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log.Fatalf("Error fetching SearchRoot at %q: %v", prefix, err)
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}
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root.searchHandler = h.(*search.Handler)
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root.searchInit = nil
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}
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}
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return root, nil
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}
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func (rh *RootHandler) registerUIHandler(h *UIHandler) {
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rh.ui = h
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}
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func (rh *RootHandler) registerSyncHandler(h *SyncHandler) {
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rh.sync = append(rh.sync, h)
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sort.Sort(byFromTo(rh.sync))
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}
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func (rh *RootHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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if wantsDiscovery(req) {
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if auth.Allowed(req, auth.OpDiscovery) {
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rh.serveDiscovery(rw, req)
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return
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}
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if !rh.Stealth {
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http.Error(rw, "Unauthorized", http.StatusUnauthorized)
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}
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return
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}
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if rh.Stealth {
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return
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}
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if req.URL.Path == "/favicon.ico" {
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serveStaticFile(rw, req, Files, "favicon.ico")
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return
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}
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configLink := ""
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if auth.IsLocalhost(req) {
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configLink = "<p>If you're coming from localhost, configure your Camlistore server at <a href='/setup'>/setup</a>.</p>"
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}
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fmt.Fprintf(rw, "<html><body>This is camlistored, a "+
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"<a href='http://camlistore.org'>Camlistore</a> server."+
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"%s"+
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"<p>To manage your content, access the <a href='/ui'>/ui</a>.</p></body></html>\n",
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configLink)
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}
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type byFromTo []*SyncHandler
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func (b byFromTo) Len() int { return len(b) }
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func (b byFromTo) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
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func (b byFromTo) Less(i, j int) bool {
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if b[i].fromName < b[j].fromName {
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return true
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}
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return b[i].fromName == b[j].fromName && b[i].toName < b[j].toName
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}
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func (rh *RootHandler) serveDiscovery(rw http.ResponseWriter, req *http.Request) {
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m := map[string]interface{}{
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"blobRoot": rh.BlobRoot,
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"searchRoot": rh.SearchRoot,
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"ownerName": rh.OwnerName,
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"statusRoot": rh.statusRoot,
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}
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if gener, ok := rh.Storage.(blobserver.Generationer); ok {
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initTime, gen, err := gener.StorageGeneration()
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if err != nil {
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m["storageGenerationError"] = err.Error()
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} else {
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m["storageInitTime"] = initTime.UTC().Format(time.RFC3339)
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m["storageGeneration"] = gen
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}
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}
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if rh.ui != nil {
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rh.ui.populateDiscoveryMap(m)
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}
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if len(rh.sync) > 0 {
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var syncHandlers []map[string]interface{}
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for _, sh := range rh.sync {
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syncHandlers = append(syncHandlers, sh.discoveryMap())
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}
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m["syncHandlers"] = syncHandlers
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}
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discoveryHelper(rw, req, m)
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}
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func discoveryHelper(rw http.ResponseWriter, req *http.Request, m map[string]interface{}) {
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rw.Header().Set("Content-Type", "text/javascript")
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if cb := req.FormValue("cb"); identOrDotPattern.MatchString(cb) {
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fmt.Fprintf(rw, "%s(", cb)
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defer rw.Write([]byte(");\n"))
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} else if v := req.FormValue("var"); identOrDotPattern.MatchString(v) {
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fmt.Fprintf(rw, "%s = ", v)
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defer rw.Write([]byte(";\n"))
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}
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bytes, _ := json.MarshalIndent(m, "", " ")
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rw.Write(bytes)
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}
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