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
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/dispatcher.h"
#include "base/callback.h"
#include "base/command_line.h"
#include "base/debug/alias.h"
#include "base/memory/scoped_ptr.h"
#include "base/metrics/user_metrics_action.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/url_constants.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "content/public/renderer/v8_value_converter.h"
#include "extensions/common/api/messaging/message.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_api.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/extension_urls.h"
#include "extensions/common/features/feature.h"
#include "extensions/common/features/feature_provider.h"
#include "extensions/common/manifest.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/background_info.h"
#include "extensions/common/manifest_handlers/externally_connectable.h"
#include "extensions/common/manifest_handlers/sandboxed_page_info.h"
#include "extensions/common/message_bundle.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/switches.h"
#include "extensions/common/view_type.h"
#include "extensions/renderer/api_activity_logger.h"
#include "extensions/renderer/api_definitions_natives.h"
#include "extensions/renderer/app_runtime_custom_bindings.h"
#include "extensions/renderer/binding_generating_native_handler.h"
#include "extensions/renderer/blob_native_handler.h"
#include "extensions/renderer/content_watcher.h"
#include "extensions/renderer/context_menus_custom_bindings.h"
#include "extensions/renderer/css_native_handler.h"
#include "extensions/renderer/dispatcher_delegate.h"
#include "extensions/renderer/document_custom_bindings.h"
#include "extensions/renderer/dom_activity_logger.h"
#include "extensions/renderer/event_bindings.h"
#include "extensions/renderer/extension_groups.h"
#include "extensions/renderer/extension_helper.h"
#include "extensions/renderer/extensions_renderer_client.h"
#include "extensions/renderer/file_system_natives.h"
#include "extensions/renderer/i18n_custom_bindings.h"
#include "extensions/renderer/id_generator_custom_bindings.h"
#include "extensions/renderer/lazy_background_page_native_handler.h"
#include "extensions/renderer/logging_native_handler.h"
#include "extensions/renderer/messaging_bindings.h"
#include "extensions/renderer/module_system.h"
#include "extensions/renderer/print_native_handler.h"
#include "extensions/renderer/process_info_native_handler.h"
#include "extensions/renderer/render_view_observer_natives.h"
#include "extensions/renderer/request_sender.h"
#include "extensions/renderer/runtime_custom_bindings.h"
#include "extensions/renderer/safe_builtins.h"
#include "extensions/renderer/script_context.h"
#include "extensions/renderer/script_context_set.h"
#include "extensions/renderer/send_request_natives.h"
#include "extensions/renderer/set_icon_natives.h"
#include "extensions/renderer/test_features_native_handler.h"
#include "extensions/renderer/user_gestures_native_handler.h"
#include "extensions/renderer/user_script_slave.h"
#include "extensions/renderer/utils_native_handler.h"
#include "extensions/renderer/v8_context_native_handler.h"
#include "grit/common_resources.h"
#include "grit/renderer_resources.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURLRequest.h"
#include "third_party/WebKit/public/web/WebCustomElement.h"
#include "third_party/WebKit/public/web/WebDataSource.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "third_party/WebKit/public/web/WebScopedUserGesture.h"
#include "third_party/WebKit/public/web/WebSecurityPolicy.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
#include "v8/include/v8.h"
using base::UserMetricsAction;
using blink::WebDataSource;
using blink::WebDocument;
using blink::WebFrame;
using blink::WebScopedUserGesture;
using blink::WebSecurityPolicy;
using blink::WebString;
using blink::WebVector;
using blink::WebView;
using content::RenderThread;
using content::RenderView;
namespace extensions {
namespace {
static const int64 kInitialExtensionIdleHandlerDelayMs = 5 * 1000;
static const int64 kMaxExtensionIdleHandlerDelayMs = 5 * 60 * 1000;
static const char kEventDispatchFunction[] = "dispatchEvent";
static const char kOnSuspendEvent[] = "runtime.onSuspend";
static const char kOnSuspendCanceledEvent[] = "runtime.onSuspendCanceled";
// Returns the global value for "chrome" from |context|. If one doesn't exist
// creates a new object for it.
//
// Note that this isn't necessarily an object, since webpages can write, for
// example, "window.chrome = true".
v8::Handle<v8::Value> GetOrCreateChrome(ScriptContext* context) {
v8::Handle<v8::String> chrome_string(
v8::String::NewFromUtf8(context->isolate(), "chrome"));
v8::Handle<v8::Object> global(context->v8_context()->Global());
v8::Handle<v8::Value> chrome(global->Get(chrome_string));
if (chrome->IsUndefined()) {
chrome = v8::Object::New(context->isolate());
global->Set(chrome_string, chrome);
}
return chrome;
}
// Returns |value| cast to an object if possible, else an empty handle.
v8::Handle<v8::Object> AsObjectOrEmpty(v8::Handle<v8::Value> value) {
return value->IsObject() ? value.As<v8::Object>() : v8::Handle<v8::Object>();
}
// Calls a method |method_name| in a module |module_name| belonging to the
// module system from |context|. Intended as a callback target from
// ScriptContextSet::ForEach.
void CallModuleMethod(const std::string& module_name,
const std::string& method_name,
const base::ListValue* args,
ScriptContext* context) {
v8::HandleScope handle_scope(context->isolate());
v8::Context::Scope context_scope(context->v8_context());
scoped_ptr<content::V8ValueConverter> converter(
content::V8ValueConverter::create());
std::vector<v8::Handle<v8::Value> > arguments;
for (base::ListValue::const_iterator it = args->begin(); it != args->end();
++it) {
arguments.push_back(converter->ToV8Value(*it, context->v8_context()));
}
context->module_system()->CallModuleMethod(
module_name, method_name, &arguments);
}
// This handles the "chrome." root API object in script contexts.
class ChromeNativeHandler : public ObjectBackedNativeHandler {
public:
explicit ChromeNativeHandler(ScriptContext* context)
: ObjectBackedNativeHandler(context) {
RouteFunction(
"GetChrome",
base::Bind(&ChromeNativeHandler::GetChrome, base::Unretained(this)));
}
void GetChrome(const v8::FunctionCallbackInfo<v8::Value>& args) {
args.GetReturnValue().Set(GetOrCreateChrome(context()));
}
};
} // namespace
Dispatcher::Dispatcher(DispatcherDelegate* delegate)
: delegate_(delegate),
content_watcher_(new ContentWatcher()),
source_map_(&ResourceBundle::GetSharedInstance()),
v8_schema_registry_(new V8SchemaRegistry),
is_webkit_initialized_(false) {
const CommandLine& command_line = *(CommandLine::ForCurrentProcess());
is_extension_process_ =
command_line.HasSwitch(extensions::switches::kExtensionProcess) ||
command_line.HasSwitch(::switches::kSingleProcess);
if (is_extension_process_) {
RenderThread::Get()->SetIdleNotificationDelayInMs(
kInitialExtensionIdleHandlerDelayMs);
}
RenderThread::Get()->RegisterExtension(SafeBuiltins::CreateV8Extension());
user_script_slave_.reset(new UserScriptSlave(&extensions_));
request_sender_.reset(new RequestSender(this));
PopulateSourceMap();
}
Dispatcher::~Dispatcher() {
}
bool Dispatcher::IsExtensionActive(const std::string& extension_id) const {
bool is_active =
active_extension_ids_.find(extension_id) != active_extension_ids_.end();
if (is_active)
CHECK(extensions_.Contains(extension_id));
return is_active;
}
std::string Dispatcher::GetExtensionID(const WebFrame* frame, int world_id) {
if (world_id != 0) {
// Isolated worlds (content script).
return user_script_slave_->GetExtensionIdForIsolatedWorld(world_id);
}
// TODO(kalman): Delete this check.
if (frame->document().securityOrigin().isUnique())
return std::string();
// Extension pages (chrome-extension:// URLs).
GURL frame_url = ScriptContext::GetDataSourceURLForFrame(frame);
return extensions_.GetExtensionOrAppIDByURL(frame_url);
}
void Dispatcher::DidCreateScriptContext(
WebFrame* frame,
const v8::Handle<v8::Context>& v8_context,
int extension_group,
int world_id) {
#if !defined(ENABLE_EXTENSIONS)
return;
#endif
std::string extension_id = GetExtensionID(frame, world_id);
const Extension* extension = extensions_.GetByID(extension_id);
if (!extension && !extension_id.empty()) {
// There are conditions where despite a context being associated with an
// extension, no extension actually gets found. Ignore "invalid" because
// CSP blocks extension page loading by switching the extension ID to
// "invalid". This isn't interesting.
if (extension_id != "invalid") {
LOG(ERROR) << "Extension \"" << extension_id << "\" not found";
RenderThread::Get()->RecordAction(
UserMetricsAction("ExtensionNotFound_ED"));
}
extension_id = "";
}
Feature::Context context_type =
ClassifyJavaScriptContext(extension,
extension_group,
ScriptContext::GetDataSourceURLForFrame(frame),
frame->document().securityOrigin());
ScriptContext* context =
delegate_->CreateScriptContext(v8_context, frame, extension, context_type)
.release();
script_context_set_.Add(context);
if (extension) {
InitOriginPermissions(extension, context_type);
}
{
scoped_ptr<ModuleSystem> module_system(
new ModuleSystem(context, &source_map_));
context->set_module_system(module_system.Pass());
}
ModuleSystem* module_system = context->module_system();
// Enable natives in startup.
ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system);
RegisterNativeHandlers(module_system, context);
// chrome.Event is part of the public API (although undocumented). Make it
// lazily evalulate to Event from event_bindings.js. For extensions only
// though, not all webpages!
if (context->extension()) {
v8::Handle<v8::Object> chrome = AsObjectOrEmpty(GetOrCreateChrome(context));
if (!chrome.IsEmpty())
module_system->SetLazyField(chrome, "Event", kEventBindings, "Event");
}
UpdateBindingsForContext(context);
bool is_within_platform_app = IsWithinPlatformApp();
// Inject custom JS into the platform app context.
if (is_within_platform_app) {
module_system->Require("platformApp");
}
delegate_->RequireAdditionalModules(
module_system, extension, context_type, is_within_platform_app);
VLOG(1) << "Num tracked contexts: " << script_context_set_.size();
}
void Dispatcher::WillReleaseScriptContext(
WebFrame* frame,
const v8::Handle<v8::Context>& v8_context,
int world_id) {
ScriptContext* context = script_context_set_.GetByV8Context(v8_context);
if (!context)
return;
context->DispatchOnUnloadEvent();
// TODO(kalman): add an invalidation observer interface to ScriptContext.
request_sender_->InvalidateSource(context);
script_context_set_.Remove(context);
VLOG(1) << "Num tracked contexts: " << script_context_set_.size();
}
void Dispatcher::DidCreateDocumentElement(blink::WebFrame* frame) {
if (IsWithinPlatformApp()) {
// WebKit doesn't let us define an additional user agent stylesheet, so we
// insert the default platform app stylesheet into all documents that are
// loaded in each app.
std::string stylesheet = ResourceBundle::GetSharedInstance()
.GetRawDataResource(IDR_PLATFORM_APP_CSS)
.as_string();
ReplaceFirstSubstringAfterOffset(
&stylesheet, 0, "$FONTFAMILY", system_font_family_);
ReplaceFirstSubstringAfterOffset(
&stylesheet, 0, "$FONTSIZE", system_font_size_);
frame->document().insertStyleSheet(WebString::fromUTF8(stylesheet));
}
content_watcher_->DidCreateDocumentElement(frame);
}
void Dispatcher::DidMatchCSS(
blink::WebFrame* frame,
const blink::WebVector<blink::WebString>& newly_matching_selectors,
const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
content_watcher_->DidMatchCSS(
frame, newly_matching_selectors, stopped_matching_selectors);
}
void Dispatcher::OnExtensionResponse(int request_id,
bool success,
const base::ListValue& response,
const std::string& error) {
request_sender_->HandleResponse(request_id, success, response, error);
}
bool Dispatcher::CheckContextAccessToExtensionAPI(
const std::string& function_name,
ScriptContext* context) const {
if (!context) {
DLOG(ERROR) << "Not in a v8::Context";
return false;
}
if (!context->extension()) {
context->isolate()->ThrowException(v8::Exception::Error(
v8::String::NewFromUtf8(context->isolate(), "Not in an extension.")));
return false;
}
// Theoretically we could end up with bindings being injected into sandboxed
// frames, for example content scripts. Don't let them execute API functions.
blink::WebFrame* frame = context->web_frame();
if (IsSandboxedPage(ScriptContext::GetDataSourceURLForFrame(frame))) {
static const char kMessage[] =
"%s cannot be used within a sandboxed frame.";
std::string error_msg = base::StringPrintf(kMessage, function_name.c_str());
context->isolate()->ThrowException(v8::Exception::Error(
v8::String::NewFromUtf8(context->isolate(), error_msg.c_str())));
return false;
}
Feature::Availability availability = context->GetAvailability(function_name);
if (!availability.is_available()) {
context->isolate()->ThrowException(
v8::Exception::Error(v8::String::NewFromUtf8(
context->isolate(), availability.message().c_str())));
}
return availability.is_available();
}
void Dispatcher::DispatchEvent(const std::string& extension_id,
const std::string& event_name) const {
base::ListValue args;
args.Set(0, new base::StringValue(event_name));
args.Set(1, new base::ListValue());
// Needed for Windows compilation, since kEventBindings is declared extern.
const char* local_event_bindings = kEventBindings;
script_context_set_.ForEach(extension_id,
NULL, // all render views
base::Bind(&CallModuleMethod,
local_event_bindings,
kEventDispatchFunction,
&args));
}
void Dispatcher::InvokeModuleSystemMethod(content::RenderView* render_view,
const std::string& extension_id,
const std::string& module_name,
const std::string& function_name,
const base::ListValue& args,
bool user_gesture) {
scoped_ptr<WebScopedUserGesture> web_user_gesture;
if (user_gesture)
web_user_gesture.reset(new WebScopedUserGesture);
script_context_set_.ForEach(
extension_id,
render_view,
base::Bind(&CallModuleMethod, module_name, function_name, &args));
// Reset the idle handler each time there's any activity like event or message
// dispatch, for which Invoke is the chokepoint.
if (is_extension_process_) {
RenderThread::Get()->ScheduleIdleHandler(
kInitialExtensionIdleHandlerDelayMs);
}
// Tell the browser process when an event has been dispatched with a lazy
// background page active.
const Extension* extension = extensions_.GetByID(extension_id);
if (extension && BackgroundInfo::HasLazyBackgroundPage(extension) &&
module_name == kEventBindings &&
function_name == kEventDispatchFunction) {
RenderView* background_view =
ExtensionHelper::GetBackgroundPage(extension_id);
if (background_view) {
background_view->Send(
new ExtensionHostMsg_EventAck(background_view->GetRoutingID()));
}
}
}
void Dispatcher::ClearPortData(int port_id) {
// Only the target port side has entries in |port_to_tab_id_map_|. If
// |port_id| is a source port, std::map::erase() will just silently fail
// here as a no-op.
port_to_tab_id_map_.erase(port_id);
}
bool Dispatcher::OnControlMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(Dispatcher, message)
IPC_MESSAGE_HANDLER(ExtensionMsg_ActivateExtension, OnActivateExtension)
IPC_MESSAGE_HANDLER(ExtensionMsg_CancelSuspend, OnCancelSuspend)
IPC_MESSAGE_HANDLER(ExtensionMsg_ClearTabSpecificPermissions,
OnClearTabSpecificPermissions)
IPC_MESSAGE_HANDLER(ExtensionMsg_DeliverMessage, OnDeliverMessage)
IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnConnect, OnDispatchOnConnect)
IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnDisconnect, OnDispatchOnDisconnect)
IPC_MESSAGE_HANDLER(ExtensionMsg_Loaded, OnLoaded)
IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnMessageInvoke)
IPC_MESSAGE_HANDLER(ExtensionMsg_SetChannel, OnSetChannel)
IPC_MESSAGE_HANDLER(ExtensionMsg_SetFunctionNames, OnSetFunctionNames)
IPC_MESSAGE_HANDLER(ExtensionMsg_SetScriptingWhitelist,
OnSetScriptingWhitelist)
IPC_MESSAGE_HANDLER(ExtensionMsg_SetSystemFont, OnSetSystemFont)
IPC_MESSAGE_HANDLER(ExtensionMsg_ShouldSuspend, OnShouldSuspend)
IPC_MESSAGE_HANDLER(ExtensionMsg_Suspend, OnSuspend)
IPC_MESSAGE_HANDLER(ExtensionMsg_Unloaded, OnUnloaded)
IPC_MESSAGE_HANDLER(ExtensionMsg_UpdatePermissions, OnUpdatePermissions)
IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateTabSpecificPermissions,
OnUpdateTabSpecificPermissions)
IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateUserScripts, OnUpdateUserScripts)
IPC_MESSAGE_HANDLER(ExtensionMsg_UsingWebRequestAPI, OnUsingWebRequestAPI)
IPC_MESSAGE_FORWARD(ExtensionMsg_WatchPages,
content_watcher_.get(),
ContentWatcher::OnWatchPages)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void Dispatcher::WebKitInitialized() {
// For extensions, we want to ensure we call the IdleHandler every so often,
// even if the extension keeps up activity.
if (is_extension_process_) {
forced_idle_timer_.reset(new base::RepeatingTimer<content::RenderThread>);
forced_idle_timer_->Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(kMaxExtensionIdleHandlerDelayMs),
RenderThread::Get(),
&RenderThread::IdleHandler);
}
// Initialize host permissions for any extensions that were activated before
// WebKit was initialized.
for (std::set<std::string>::iterator iter = active_extension_ids_.begin();
iter != active_extension_ids_.end();
++iter) {
const Extension* extension = extensions_.GetByID(*iter);
CHECK(extension);
}
EnableCustomElementWhiteList();
is_webkit_initialized_ = true;
}
void Dispatcher::IdleNotification() {
if (is_extension_process_) {
// Dampen the forced delay as well if the extension stays idle for long
// periods of time.
int64 forced_delay_ms =
std::max(RenderThread::Get()->GetIdleNotificationDelayInMs(),
kMaxExtensionIdleHandlerDelayMs);
forced_idle_timer_->Stop();
forced_idle_timer_->Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(forced_delay_ms),
RenderThread::Get(),
&RenderThread::IdleHandler);
}
}
void Dispatcher::OnRenderProcessShutdown() {
v8_schema_registry_.reset();
forced_idle_timer_.reset();
}
void Dispatcher::OnActivateExtension(const std::string& extension_id) {
const Extension* extension = extensions_.GetByID(extension_id);
if (!extension) {
// Extension was activated but was never loaded. This probably means that
// the renderer failed to load it (or the browser failed to tell us when it
// did). Failures shouldn't happen, but instead of crashing there (which
// executes on all renderers) be conservative and only crash in the renderer
// of the extension which failed to load; this one.
std::string& error = extension_load_errors_[extension_id];
char minidump[256];
base::debug::Alias(&minidump);
base::snprintf(minidump,
arraysize(minidump),
"e::dispatcher:%s:%s",
extension_id.c_str(),
error.c_str());
CHECK(extension) << extension_id << " was never loaded: " << error;
}
active_extension_ids_.insert(extension_id);
// This is called when starting a new extension page, so start the idle
// handler ticking.
RenderThread::Get()->ScheduleIdleHandler(kInitialExtensionIdleHandlerDelayMs);
if (is_webkit_initialized_) {
extensions::DOMActivityLogger::AttachToWorld(
extensions::DOMActivityLogger::kMainWorldId, extension_id);
}
UpdateActiveExtensions();
}
void Dispatcher::OnCancelSuspend(const std::string& extension_id) {
DispatchEvent(extension_id, kOnSuspendCanceledEvent);
}
void Dispatcher::OnClearTabSpecificPermissions(
int tab_id,
const std::vector<std::string>& extension_ids) {
delegate_->ClearTabSpecificPermissions(this, tab_id, extension_ids);
}
void Dispatcher::OnDeliverMessage(int target_port_id, const Message& message) {
scoped_ptr<RequestSender::ScopedTabID> scoped_tab_id;
std::map<int, int>::const_iterator it =
port_to_tab_id_map_.find(target_port_id);
if (it != port_to_tab_id_map_.end()) {
scoped_tab_id.reset(
new RequestSender::ScopedTabID(request_sender(), it->second));
}
MessagingBindings::DeliverMessage(script_context_set_.GetAll(),
target_port_id,
message,
NULL); // All render views.
}
void Dispatcher::OnDispatchOnConnect(
int target_port_id,
const std::string& channel_name,
const base::DictionaryValue& source_tab,
const ExtensionMsg_ExternalConnectionInfo& info,
const std::string& tls_channel_id) {
DCHECK(!ContainsKey(port_to_tab_id_map_, target_port_id));
DCHECK_EQ(1, target_port_id % 2); // target renderer ports have odd IDs.
int sender_tab_id = -1;
source_tab.GetInteger("id", &sender_tab_id);
port_to_tab_id_map_[target_port_id] = sender_tab_id;
MessagingBindings::DispatchOnConnect(script_context_set_.GetAll(),
target_port_id,
channel_name,
source_tab,
info.source_id,
info.target_id,
info.source_url,
tls_channel_id,
NULL); // All render views.
}
void Dispatcher::OnDispatchOnDisconnect(int port_id,
const std::string& error_message) {
MessagingBindings::DispatchOnDisconnect(script_context_set_.GetAll(),
port_id,
error_message,
NULL); // All render views.
}
void Dispatcher::OnLoaded(
const std::vector<ExtensionMsg_Loaded_Params>& loaded_extensions) {
std::vector<ExtensionMsg_Loaded_Params>::const_iterator i;
for (i = loaded_extensions.begin(); i != loaded_extensions.end(); ++i) {
std::string error;
scoped_refptr<const Extension> extension = i->ConvertToExtension(&error);
if (!extension.get()) {
extension_load_errors_[i->id] = error;
continue;
}
OnLoadedInternal(extension);
}
// Update the available bindings for all contexts. These may have changed if
// an externally_connectable extension was loaded that can connect to an
// open webpage.
UpdateBindings("");
}
void Dispatcher::OnLoadedInternal(scoped_refptr<const Extension> extension) {
extensions_.Insert(extension);
}
void Dispatcher::OnMessageInvoke(const std::string& extension_id,
const std::string& module_name,
const std::string& function_name,
const base::ListValue& args,
bool user_gesture) {
InvokeModuleSystemMethod(
NULL, extension_id, module_name, function_name, args, user_gesture);
}
void Dispatcher::OnSetChannel(int channel) {
delegate_->SetChannel(channel);
}
void Dispatcher::OnSetFunctionNames(const std::vector<std::string>& names) {
function_names_.clear();
for (size_t i = 0; i < names.size(); ++i)
function_names_.insert(names[i]);
}
void Dispatcher::OnSetScriptingWhitelist(
const ExtensionsClient::ScriptingWhitelist& extension_ids) {
ExtensionsClient::Get()->SetScriptingWhitelist(extension_ids);
}
void Dispatcher::OnSetSystemFont(const std::string& font_family,
const std::string& font_size) {
system_font_family_ = font_family;
system_font_size_ = font_size;
}
void Dispatcher::OnShouldSuspend(const std::string& extension_id,
int sequence_id) {
RenderThread::Get()->Send(
new ExtensionHostMsg_ShouldSuspendAck(extension_id, sequence_id));
}
void Dispatcher::OnSuspend(const std::string& extension_id) {
// Dispatch the suspend event. This doesn't go through the standard event
// dispatch machinery because it requires special handling. We need to let
// the browser know when we are starting and stopping the event dispatch, so
// that it still considers the extension idle despite any activity the suspend
// event creates.
DispatchEvent(extension_id, kOnSuspendEvent);
RenderThread::Get()->Send(new ExtensionHostMsg_SuspendAck(extension_id));
}
void Dispatcher::OnUnloaded(const std::string& id) {
extensions_.Remove(id);
active_extension_ids_.erase(id);
// If the extension is later reloaded with a different set of permissions,
// we'd like it to get a new isolated world ID, so that it can pick up the
// changed origin whitelist.
user_script_slave_->RemoveIsolatedWorld(id);
// Invalidate all of the contexts that were removed.
// TODO(kalman): add an invalidation observer interface to ScriptContext.
ScriptContextSet::ContextSet removed_contexts =
script_context_set_.OnExtensionUnloaded(id);
for (ScriptContextSet::ContextSet::iterator it = removed_contexts.begin();
it != removed_contexts.end();
++it) {
request_sender_->InvalidateSource(*it);
}
// Update the available bindings for the remaining contexts. These may have
// changed if an externally_connectable extension is unloaded and a webpage
// is no longer accessible.
UpdateBindings("");
// Invalidates the messages map for the extension in case the extension is
// reloaded with a new messages map.
EraseL10nMessagesMap(id);
// We don't do anything with existing platform-app stylesheets. They will
// stay resident, but the URL pattern corresponding to the unloaded
// extension's URL just won't match anything anymore.
}
void Dispatcher::OnUpdatePermissions(
const ExtensionMsg_UpdatePermissions_Params& params) {
int reason_id = params.reason_id;
const std::string& extension_id = params.extension_id;
const APIPermissionSet& apis = params.apis;
const ManifestPermissionSet& manifest_permissions =
params.manifest_permissions;
const URLPatternSet& explicit_hosts = params.explicit_hosts;
const URLPatternSet& scriptable_hosts = params.scriptable_hosts;
const Extension* extension = extensions_.GetByID(extension_id);
if (!extension)
return;
scoped_refptr<const PermissionSet> delta = new PermissionSet(
apis, manifest_permissions, explicit_hosts, scriptable_hosts);
scoped_refptr<const PermissionSet> old_active =
extension->GetActivePermissions();
UpdatedExtensionPermissionsInfo::Reason reason =
static_cast<UpdatedExtensionPermissionsInfo::Reason>(reason_id);
const PermissionSet* new_active = NULL;
switch (reason) {
case UpdatedExtensionPermissionsInfo::ADDED:
new_active = PermissionSet::CreateUnion(old_active.get(), delta.get());
break;
case UpdatedExtensionPermissionsInfo::REMOVED:
new_active =
PermissionSet::CreateDifference(old_active.get(), delta.get());
break;
}
PermissionsData::SetActivePermissions(extension, new_active);
UpdateOriginPermissions(reason, extension, explicit_hosts);
UpdateBindings(extension->id());
}
void Dispatcher::OnUpdateTabSpecificPermissions(
int page_id,
int tab_id,
const std::string& extension_id,
const URLPatternSet& origin_set) {
delegate_->UpdateTabSpecificPermissions(
this, page_id, tab_id, extension_id, origin_set);
}
void Dispatcher::OnUpdateUserScripts(base::SharedMemoryHandle scripts) {
DCHECK(base::SharedMemory::IsHandleValid(scripts)) << "Bad scripts handle";
user_script_slave_->UpdateScripts(scripts);
UpdateActiveExtensions();
}
void Dispatcher::OnUsingWebRequestAPI(bool adblock,
bool adblock_plus,
bool other_webrequest) {
delegate_->HandleWebRequestAPIUsage(adblock, adblock_plus, other_webrequest);
}
void Dispatcher::UpdateActiveExtensions() {
std::set<std::string> active_extensions = active_extension_ids_;
user_script_slave_->GetActiveExtensions(&active_extensions);
delegate_->OnActiveExtensionsUpdated(active_extensions);
}
void Dispatcher::InitOriginPermissions(const Extension* extension,
Feature::Context context_type) {
delegate_->InitOriginPermissions(extension, context_type);
UpdateOriginPermissions(
UpdatedExtensionPermissionsInfo::ADDED,
extension,
PermissionsData::GetEffectiveHostPermissions(extension));
}
void Dispatcher::UpdateOriginPermissions(
UpdatedExtensionPermissionsInfo::Reason reason,
const Extension* extension,
const URLPatternSet& origins) {
for (URLPatternSet::const_iterator i = origins.begin(); i != origins.end();
++i) {
const char* schemes[] = {
url::kHttpScheme,
url::kHttpsScheme,
content::kFileScheme,
content::kChromeUIScheme,
content::kFtpScheme,
};
for (size_t j = 0; j < arraysize(schemes); ++j) {
if (i->MatchesScheme(schemes[j])) {
((reason == UpdatedExtensionPermissionsInfo::REMOVED)
? WebSecurityPolicy::removeOriginAccessWhitelistEntry
: WebSecurityPolicy::addOriginAccessWhitelistEntry)(
extension->url(),
WebString::fromUTF8(schemes[j]),
WebString::fromUTF8(i->host()),
i->match_subdomains());
}
}
}
}
void Dispatcher::EnableCustomElementWhiteList() {
blink::WebCustomElement::addEmbedderCustomElementName("webview");
// TODO(fsamuel): Add <adview> to the whitelist once it has been converted
// into a custom element.
blink::WebCustomElement::addEmbedderCustomElementName("browser-plugin");
}
void Dispatcher::UpdateBindings(const std::string& extension_id) {
script_context_set().ForEach(extension_id,
NULL, // all render views
base::Bind(&Dispatcher::UpdateBindingsForContext,
base::Unretained(this)));
}
void Dispatcher::UpdateBindingsForContext(ScriptContext* context) {
v8::HandleScope handle_scope(context->isolate());
v8::Context::Scope context_scope(context->v8_context());
// TODO(kalman): Make the bindings registration have zero overhead then run
// the same code regardless of context type.
switch (context->context_type()) {
case Feature::UNSPECIFIED_CONTEXT:
case Feature::WEB_PAGE_CONTEXT:
case Feature::BLESSED_WEB_PAGE_CONTEXT: {
// Web page context; it's too expensive to run the full bindings code.
// Hard-code that the app and webstore APIs are available...
RegisterBinding("app", context);
RegisterBinding("webstore", context);
// ... and that the runtime API might be available if any extension can
// connect to it.
bool runtime_is_available = false;
for (ExtensionSet::const_iterator it = extensions_.begin();
it != extensions_.end();
++it) {
ExternallyConnectableInfo* info =
static_cast<ExternallyConnectableInfo*>(
(*it)->GetManifestData(manifest_keys::kExternallyConnectable));
if (info && info->matches.MatchesURL(context->GetURL())) {
runtime_is_available = true;
break;
}
}
if (runtime_is_available)
RegisterBinding("runtime", context);
break;
}
case Feature::BLESSED_EXTENSION_CONTEXT:
case Feature::UNBLESSED_EXTENSION_CONTEXT:
case Feature::CONTENT_SCRIPT_CONTEXT: {
// Extension context; iterate through all the APIs and bind the available
// ones.
FeatureProvider* api_feature_provider = FeatureProvider::GetAPIFeatures();
const std::vector<std::string>& apis =
api_feature_provider->GetAllFeatureNames();
for (std::vector<std::string>::const_iterator it = apis.begin();
it != apis.end();
++it) {
const std::string& api_name = *it;
Feature* feature = api_feature_provider->GetFeature(api_name);
DCHECK(feature);
// Internal APIs are included via require(api_name) from internal code
// rather than chrome[api_name].
if (feature->IsInternal())
continue;
// If this API has a parent feature (and isn't marked 'noparent'),
// then this must be a function or event, so we should not register.
if (api_feature_provider->GetParent(feature) != NULL)
continue;
if (context->IsAnyFeatureAvailableToContext(*feature))
RegisterBinding(api_name, context);
}
if (CommandLine::ForCurrentProcess()->HasSwitch(::switches::kTestType)) {
RegisterBinding("test", context);
}
break;
}
}
}
void Dispatcher::RegisterBinding(const std::string& api_name,
ScriptContext* context) {
std::string bind_name;
v8::Handle<v8::Object> bind_object =
GetOrCreateBindObjectIfAvailable(api_name, &bind_name, context);
// Empty if the bind object failed to be created, probably because the
// extension overrode chrome with a non-object, e.g. window.chrome = true.
if (bind_object.IsEmpty())
return;
v8::Local<v8::String> v8_api_name =
v8::String::NewFromUtf8(context->isolate(), api_name.c_str());
if (bind_object->HasRealNamedProperty(v8_api_name)) {
// The bind object may already have the property if the API has been
// registered before (or if the extension has put something there already,
// but, whatevs).
//
// In the former case, we need to re-register the bindings for the APIs
// which the extension now has permissions for (if any), but not touch any
// others so that we don't destroy state such as event listeners.
//
// TODO(kalman): Only register available APIs to make this all moot.
if (bind_object->HasRealNamedCallbackProperty(v8_api_name))
return; // lazy binding still there, nothing to do
if (bind_object->Get(v8_api_name)->IsObject())
return; // binding has already been fully installed
}
ModuleSystem* module_system = context->module_system();
if (!source_map_.Contains(api_name)) {
module_system->RegisterNativeHandler(
api_name,
scoped_ptr<NativeHandler>(new BindingGeneratingNativeHandler(
module_system, api_name, "binding")));
module_system->SetNativeLazyField(
bind_object, bind_name, api_name, "binding");
} else {
module_system->SetLazyField(bind_object, bind_name, api_name, "binding");
}
}
// NOTE: please use the naming convention "foo_natives" for these.
void Dispatcher::RegisterNativeHandlers(ModuleSystem* module_system,
ScriptContext* context) {
module_system->RegisterNativeHandler(
"chrome", scoped_ptr<NativeHandler>(new ChromeNativeHandler(context)));
module_system->RegisterNativeHandler(
"lazy_background_page",
scoped_ptr<NativeHandler>(new LazyBackgroundPageNativeHandler(context)));
module_system->RegisterNativeHandler(
"logging", scoped_ptr<NativeHandler>(new LoggingNativeHandler(context)));
module_system->RegisterNativeHandler("schema_registry",
v8_schema_registry_->AsNativeHandler());
module_system->RegisterNativeHandler(
"print", scoped_ptr<NativeHandler>(new PrintNativeHandler(context)));
module_system->RegisterNativeHandler(
"test_features",
scoped_ptr<NativeHandler>(new TestFeaturesNativeHandler(context)));
module_system->RegisterNativeHandler(
"user_gestures",
scoped_ptr<NativeHandler>(new UserGesturesNativeHandler(context)));
module_system->RegisterNativeHandler(
"utils", scoped_ptr<NativeHandler>(new UtilsNativeHandler(context)));
module_system->RegisterNativeHandler(
"v8_context",
scoped_ptr<NativeHandler>(new V8ContextNativeHandler(context, this)));
const Extension* extension = context->extension();
int manifest_version = extension ? extension->manifest_version() : 1;
bool send_request_disabled =
(extension && Manifest::IsUnpackedLocation(extension->location()) &&
BackgroundInfo::HasLazyBackgroundPage(extension));
module_system->RegisterNativeHandler(
"process",
scoped_ptr<NativeHandler>(new ProcessInfoNativeHandler(
context,
context->GetExtensionID(),
context->GetContextTypeDescription(),
ExtensionsRendererClient::Get()->IsIncognitoProcess(),
manifest_version,
send_request_disabled)));
module_system->RegisterNativeHandler(
"event_natives",
scoped_ptr<NativeHandler>(new EventBindings(this, context)));
module_system->RegisterNativeHandler(
"messaging_natives",
scoped_ptr<NativeHandler>(MessagingBindings::Get(this, context)));
module_system->RegisterNativeHandler(
"apiDefinitions",
scoped_ptr<NativeHandler>(new ApiDefinitionsNatives(this, context)));
module_system->RegisterNativeHandler(
"sendRequest",
scoped_ptr<NativeHandler>(
new SendRequestNatives(request_sender_.get(), context)));
module_system->RegisterNativeHandler(
"setIcon",
scoped_ptr<NativeHandler>(
new SetIconNatives(request_sender_.get(), context)));
module_system->RegisterNativeHandler(
"activityLogger",
scoped_ptr<NativeHandler>(new APIActivityLogger(context)));
module_system->RegisterNativeHandler(
"renderViewObserverNatives",
scoped_ptr<NativeHandler>(new RenderViewObserverNatives(context)));
// Natives used by multiple APIs.
module_system->RegisterNativeHandler(
"file_system_natives",
scoped_ptr<NativeHandler>(new FileSystemNatives(context)));
// Custom bindings.
module_system->RegisterNativeHandler(
"app_runtime",
scoped_ptr<NativeHandler>(new AppRuntimeCustomBindings(context)));
module_system->RegisterNativeHandler(
"blob_natives",
scoped_ptr<NativeHandler>(new BlobNativeHandler(context)));
module_system->RegisterNativeHandler(
"context_menus",
scoped_ptr<NativeHandler>(new ContextMenusCustomBindings(context)));
module_system->RegisterNativeHandler(
"css_natives", scoped_ptr<NativeHandler>(new CssNativeHandler(context)));
module_system->RegisterNativeHandler(
"document_natives",
scoped_ptr<NativeHandler>(new DocumentCustomBindings(context)));
module_system->RegisterNativeHandler(
"i18n", scoped_ptr<NativeHandler>(new I18NCustomBindings(context)));
module_system->RegisterNativeHandler(
"id_generator",
scoped_ptr<NativeHandler>(new IdGeneratorCustomBindings(context)));
module_system->RegisterNativeHandler(
"runtime", scoped_ptr<NativeHandler>(new RuntimeCustomBindings(context)));
delegate_->RegisterNativeHandlers(this, module_system, context);
}
void Dispatcher::PopulateSourceMap() {
// Libraries.
source_map_.RegisterSource("entryIdManager", IDR_ENTRY_ID_MANAGER);
source_map_.RegisterSource(kEventBindings, IDR_EVENT_BINDINGS_JS);
source_map_.RegisterSource("imageUtil", IDR_IMAGE_UTIL_JS);
source_map_.RegisterSource("json_schema", IDR_JSON_SCHEMA_JS);
source_map_.RegisterSource("lastError", IDR_LAST_ERROR_JS);
source_map_.RegisterSource("messaging", IDR_MESSAGING_JS);
source_map_.RegisterSource("messaging_utils", IDR_MESSAGING_UTILS_JS);
source_map_.RegisterSource(kSchemaUtils, IDR_SCHEMA_UTILS_JS);
source_map_.RegisterSource("sendRequest", IDR_SEND_REQUEST_JS);
source_map_.RegisterSource("setIcon", IDR_SET_ICON_JS);
source_map_.RegisterSource("test", IDR_TEST_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("unload_event", IDR_UNLOAD_EVENT_JS);
source_map_.RegisterSource("utils", IDR_UTILS_JS);
// Custom bindings.
source_map_.RegisterSource("app.runtime", IDR_APP_RUNTIME_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("contextMenus",
IDR_CONTEXT_MENUS_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("extension", IDR_EXTENSION_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("i18n", IDR_I18N_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("permissions", IDR_PERMISSIONS_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("runtime", IDR_RUNTIME_CUSTOM_BINDINGS_JS);
source_map_.RegisterSource("binding", IDR_BINDING_JS);
// Custom types sources.
source_map_.RegisterSource("StorageArea", IDR_STORAGE_AREA_JS);
// Platform app sources that are not API-specific..
source_map_.RegisterSource("platformApp", IDR_PLATFORM_APP_JS);
delegate_->PopulateSourceMap(&source_map_);
}
bool Dispatcher::IsWithinPlatformApp() {
for (std::set<std::string>::iterator iter = active_extension_ids_.begin();
iter != active_extension_ids_.end();
++iter) {
const Extension* extension = extensions_.GetByID(*iter);
if (extension && extension->is_platform_app())
return true;
}
return false;
}
// TODO(kalman): This is checking for the wrong thing, it should be checking if
// the frame's security origin is unique. The extension sandbox directive is
// checked for in extensions/common/manifest_handlers/csp_info.cc.
bool Dispatcher::IsSandboxedPage(const GURL& url) const {
if (url.SchemeIs(kExtensionScheme)) {
const Extension* extension = extensions_.GetByID(url.host());
if (extension) {
return SandboxedPageInfo::IsSandboxedPage(extension, url.path());
}
}
return false;
}
Feature::Context Dispatcher::ClassifyJavaScriptContext(
const Extension* extension,
int extension_group,
const GURL& url,
const blink::WebSecurityOrigin& origin) {
DCHECK_GE(extension_group, 0);
if (extension_group == EXTENSION_GROUP_CONTENT_SCRIPTS) {
return extension ? // TODO(kalman): when does this happen?
Feature::CONTENT_SCRIPT_CONTEXT
: Feature::UNSPECIFIED_CONTEXT;
}
// We have an explicit check for sandboxed pages before checking whether the
// extension is active in this process because:
// 1. Sandboxed pages run in the same process as regular extension pages, so
// the extension is considered active.
// 2. ScriptContext creation (which triggers bindings injection) happens
// before the SecurityContext is updated with the sandbox flags (after
// reading the CSP header), so the caller can't check if the context's
// security origin is unique yet.
if (IsSandboxedPage(url))
return Feature::WEB_PAGE_CONTEXT;
if (extension && IsExtensionActive(extension->id())) {
// |extension| is active in this process, but it could be either a true
// extension process or within the extent of a hosted app. In the latter
// case this would usually be considered a (blessed) web page context,
// unless the extension in question is a component extension, in which case
// we cheat and call it blessed.
return (extension->is_hosted_app() &&
extension->location() != Manifest::COMPONENT)
? Feature::BLESSED_WEB_PAGE_CONTEXT
: Feature::BLESSED_EXTENSION_CONTEXT;
}
// TODO(kalman): This isUnique() check is wrong, it should be performed as
// part of IsSandboxedPage().
if (!origin.isUnique() && extensions_.ExtensionBindingsAllowed(url)) {
if (!extension) // TODO(kalman): when does this happen?
return Feature::UNSPECIFIED_CONTEXT;
return extension->is_hosted_app() ? Feature::BLESSED_WEB_PAGE_CONTEXT
: Feature::UNBLESSED_EXTENSION_CONTEXT;
}
if (url.is_valid())
return Feature::WEB_PAGE_CONTEXT;
return Feature::UNSPECIFIED_CONTEXT;
}
v8::Handle<v8::Object> Dispatcher::GetOrCreateObject(
const v8::Handle<v8::Object>& object,
const std::string& field,
v8::Isolate* isolate) {
v8::Handle<v8::String> key = v8::String::NewFromUtf8(isolate, field.c_str());
// If the object has a callback property, it is assumed it is an unavailable
// API, so it is safe to delete. This is checked before GetOrCreateObject is
// called.
if (object->HasRealNamedCallbackProperty(key)) {
object->Delete(key);
} else if (object->HasRealNamedProperty(key)) {
v8::Handle<v8::Value> value = object->Get(key);
CHECK(value->IsObject());
return v8::Handle<v8::Object>::Cast(value);
}
v8::Handle<v8::Object> new_object = v8::Object::New(isolate);
object->Set(key, new_object);
return new_object;
}
v8::Handle<v8::Object> Dispatcher::GetOrCreateBindObjectIfAvailable(
const std::string& api_name,
std::string* bind_name,
ScriptContext* context) {
std::vector<std::string> split;
base::SplitString(api_name, '.', &split);
v8::Handle<v8::Object> bind_object;
// Check if this API has an ancestor. If the API's ancestor is available and
// the API is not available, don't install the bindings for this API. If
// the API is available and its ancestor is not, delete the ancestor and
// install the bindings for the API. This is to prevent loading the ancestor
// API schema if it will not be needed.
//
// For example:
// If app is available and app.window is not, just install app.
// If app.window is available and app is not, delete app and install
// app.window on a new object so app does not have to be loaded.
FeatureProvider* api_feature_provider = FeatureProvider::GetAPIFeatures();
std::string ancestor_name;
bool only_ancestor_available = false;
for (size_t i = 0; i < split.size() - 1; ++i) {
ancestor_name += (i ? "." : "") + split[i];
if (api_feature_provider->GetFeature(ancestor_name) &&
context->GetAvailability(ancestor_name).is_available() &&
!context->GetAvailability(api_name).is_available()) {
only_ancestor_available = true;
break;
}
if (bind_object.IsEmpty()) {
bind_object = AsObjectOrEmpty(GetOrCreateChrome(context));
if (bind_object.IsEmpty())
return v8::Handle<v8::Object>();
}
bind_object = GetOrCreateObject(bind_object, split[i], context->isolate());
}
if (only_ancestor_available)
return v8::Handle<v8::Object>();
if (bind_name)
*bind_name = split.back();
return bind_object.IsEmpty() ? AsObjectOrEmpty(GetOrCreateChrome(context))
: bind_object;
}
} // namespace extensions
|