/
root.go
218 lines (190 loc) · 6 KB
/
root.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/*
Copyright 2011 Google Inc.
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 server
import (
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"sort"
"sync"
"time"
"camlistore.org/pkg/auth"
"camlistore.org/pkg/blobserver"
"camlistore.org/pkg/images"
"camlistore.org/pkg/jsonconfig"
"camlistore.org/pkg/osutil"
"camlistore.org/pkg/search"
)
// RootHandler handles serving the about/splash page.
type RootHandler struct {
// Stealth determines whether we hide from non-authenticated
// clients.
Stealth bool
OwnerName string // for display purposes only.
Username string // default user for mobile setup.
// URL prefixes (path or full URL) to the primary blob and
// search root.
BlobRoot string
SearchRoot string
statusRoot string
Storage blobserver.Storage // of BlobRoot, or nil
searchInitOnce sync.Once // runs searchInit, which populates searchHandler
searchInit func()
searchHandler *search.Handler // of SearchRoot, or nil
ui *UIHandler // or nil, if none configured
sync []*SyncHandler // list of configured sync handlers, for discovery.
}
func (rh *RootHandler) SearchHandler() (h *search.Handler, ok bool) {
rh.searchInitOnce.Do(rh.searchInit)
return rh.searchHandler, rh.searchHandler != nil
}
func init() {
blobserver.RegisterHandlerConstructor("root", newRootFromConfig)
}
func newRootFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (h http.Handler, err error) {
username, err := getUserName()
if err != nil {
return
}
root := &RootHandler{
BlobRoot: conf.OptionalString("blobRoot", ""),
SearchRoot: conf.OptionalString("searchRoot", ""),
OwnerName: conf.OptionalString("ownerName", username),
Username: osutil.Username(),
}
root.Stealth = conf.OptionalBool("stealth", false)
root.statusRoot = conf.OptionalString("statusRoot", "")
if err = conf.Validate(); err != nil {
return
}
if root.BlobRoot != "" {
bs, err := ld.GetStorage(root.BlobRoot)
if err != nil {
return nil, fmt.Errorf("Root handler's blobRoot of %q error: %v", root.BlobRoot, err)
}
root.Storage = bs
}
root.searchInit = func() {}
if root.SearchRoot != "" {
prefix := root.SearchRoot
if t := ld.GetHandlerType(prefix); t != "search" {
if t == "" {
return nil, fmt.Errorf("root handler's searchRoot of %q is invalid and doesn't refer to a declared handler", prefix)
}
return nil, fmt.Errorf("root handler's searchRoot of %q is of type %q, not %q", prefix, t, "search")
}
root.searchInit = func() {
h, err := ld.GetHandler(prefix)
if err != nil {
log.Fatalf("Error fetching SearchRoot at %q: %v", prefix, err)
}
root.searchHandler = h.(*search.Handler)
root.searchInit = nil
}
}
return root, nil
}
func (rh *RootHandler) registerUIHandler(h *UIHandler) {
rh.ui = h
}
func (rh *RootHandler) registerSyncHandler(h *SyncHandler) {
rh.sync = append(rh.sync, h)
sort.Sort(byFromTo(rh.sync))
}
func (rh *RootHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if wantsDiscovery(req) {
if auth.Allowed(req, auth.OpDiscovery) {
rh.serveDiscovery(rw, req)
return
}
if !rh.Stealth {
http.Error(rw, "Unauthorized", http.StatusUnauthorized)
}
return
}
if rh.Stealth {
return
}
if req.URL.Path == "/favicon.ico" {
serveStaticFile(rw, req, Files, "favicon.ico")
return
}
configLink := ""
if auth.IsLocalhost(req) && !isDevServer() {
configLink = "<p>If you're coming from localhost, configure your Camlistore server at <a href='/setup'>/setup</a>.</p>"
}
fmt.Fprintf(rw, "<html><body>This is camlistored, a "+
"<a href='http://camlistore.org'>Camlistore</a> server."+
"%s"+
"<p>To manage your content, access the <a href='/ui/'>/ui/</a>.</p></body></html>\n",
configLink)
}
func isDevServer() bool {
return os.Getenv("CAMLI_DEV_CAMLI_ROOT") != ""
}
type byFromTo []*SyncHandler
func (b byFromTo) Len() int { return len(b) }
func (b byFromTo) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b byFromTo) Less(i, j int) bool {
if b[i].fromName < b[j].fromName {
return true
}
return b[i].fromName == b[j].fromName && b[i].toName < b[j].toName
}
func (rh *RootHandler) serveDiscovery(rw http.ResponseWriter, req *http.Request) {
m := map[string]interface{}{
"blobRoot": rh.BlobRoot,
"searchRoot": rh.SearchRoot,
"ownerName": rh.OwnerName,
"username": rh.Username,
"statusRoot": rh.statusRoot,
"wsAuthToken": auth.ProcessRandom(),
"thumbVersion": images.ThumbnailVersion(),
}
if gener, ok := rh.Storage.(blobserver.Generationer); ok {
initTime, gen, err := gener.StorageGeneration()
if err != nil {
m["storageGenerationError"] = err.Error()
} else {
m["storageInitTime"] = initTime.UTC().Format(time.RFC3339)
m["storageGeneration"] = gen
}
} else {
log.Printf("Storage type %T is not a blobserver.Generationer; not sending storageGeneration", rh.Storage)
}
if rh.ui != nil {
rh.ui.populateDiscoveryMap(m)
}
if len(rh.sync) > 0 {
var syncHandlers []map[string]interface{}
for _, sh := range rh.sync {
syncHandlers = append(syncHandlers, sh.discoveryMap())
}
m["syncHandlers"] = syncHandlers
}
discoveryHelper(rw, req, m)
}
func discoveryHelper(rw http.ResponseWriter, req *http.Request, m map[string]interface{}) {
rw.Header().Set("Content-Type", "text/javascript")
if cb := req.FormValue("cb"); identOrDotPattern.MatchString(cb) {
fmt.Fprintf(rw, "%s(", cb)
defer rw.Write([]byte(");\n"))
} else if v := req.FormValue("var"); identOrDotPattern.MatchString(v) {
fmt.Fprintf(rw, "%s = ", v)
defer rw.Write([]byte(";\n"))
}
bytes, _ := json.MarshalIndent(m, "", " ")
rw.Write(bytes)
}