forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathnsJSProtocolHandler.cpp
1361 lines (1113 loc) · 40.3 KB
/
nsJSProtocolHandler.cpp
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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=4 sw=2 et tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsCOMPtr.h"
#include "jsapi.h"
#include "js/Wrapper.h"
#include "nsCRT.h"
#include "nsError.h"
#include "nsString.h"
#include "nsGlobalWindowInner.h"
#include "nsReadableUtils.h"
#include "nsJSProtocolHandler.h"
#include "nsStringStream.h"
#include "nsNetUtil.h"
#include "nsIStreamListener.h"
#include "nsIURI.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPrincipal.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsPIDOMWindow.h"
#include "nsEscape.h"
#include "nsIWebNavigation.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsContentUtils.h"
#include "nsJSUtils.h"
#include "nsThreadUtils.h"
#include "nsIScriptChannel.h"
#include "mozilla/dom/Document.h"
#include "nsIObjectInputStream.h"
#include "nsIObjectOutputStream.h"
#include "nsITextToSubURI.h"
#include "nsIWritablePropertyBag2.h"
#include "nsIContentSecurityPolicy.h"
#include "nsSandboxFlags.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/dom/DOMSecurityMonitor.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/PopupBlocker.h"
#include "nsContentSecurityManager.h"
#include "mozilla/LoadInfo.h"
#include "mozilla/Maybe.h"
#include "mozilla/TextUtils.h"
#include "mozilla/ipc/URIUtils.h"
using mozilla::IsAscii;
using mozilla::dom::AutoEntryScript;
static NS_DEFINE_CID(kJSURICID, NS_JSURI_CID);
class nsJSThunk : public nsIInputStream {
public:
nsJSThunk();
NS_DECL_THREADSAFE_ISUPPORTS
NS_FORWARD_SAFE_NSIINPUTSTREAM(mInnerStream)
nsresult Init(nsIURI* uri);
nsresult EvaluateScript(
nsIChannel* aChannel,
mozilla::dom::PopupBlocker::PopupControlState aPopupState,
uint32_t aExecutionPolicy, nsPIDOMWindowInner* aOriginalInnerWindow);
protected:
virtual ~nsJSThunk();
nsCOMPtr<nsIInputStream> mInnerStream;
nsCString mScript;
nsCString mURL;
};
//
// nsISupports implementation...
//
NS_IMPL_ISUPPORTS(nsJSThunk, nsIInputStream)
nsJSThunk::nsJSThunk() = default;
nsJSThunk::~nsJSThunk() = default;
nsresult nsJSThunk::Init(nsIURI* uri) {
NS_ENSURE_ARG_POINTER(uri);
// Get the script string to evaluate...
nsresult rv = uri->GetPathQueryRef(mScript);
if (NS_FAILED(rv)) return rv;
// Get the url.
rv = uri->GetSpec(mURL);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
static bool IsISO88591(const nsString& aString) {
for (nsString::const_char_iterator c = aString.BeginReading(),
c_end = aString.EndReading();
c < c_end; ++c) {
if (*c > 255) return false;
}
return true;
}
static nsIScriptGlobalObject* GetGlobalObject(nsIChannel* aChannel) {
// Get the global object owner from the channel
nsCOMPtr<nsIDocShell> docShell;
NS_QueryNotificationCallbacks(aChannel, docShell);
if (!docShell) {
NS_WARNING("Unable to get a docShell from the channel!");
return nullptr;
}
// So far so good: get the script global from its docshell
nsIScriptGlobalObject* global = docShell->GetScriptGlobalObject();
NS_ASSERTION(global,
"Unable to get an nsIScriptGlobalObject from the "
"docShell!");
return global;
}
static bool AllowedByCSP(nsIContentSecurityPolicy* aCSP,
const nsAString& aContentOfPseudoScript) {
if (!aCSP) {
return true;
}
bool allowsInlineScript = true;
nsresult rv = aCSP->GetAllowsInline(nsIContentPolicy::TYPE_SCRIPT,
u""_ns, // aNonce
true, // aParserCreated
nullptr, // aElement,
nullptr, // nsICSPEventListener
aContentOfPseudoScript, // aContent
0, // aLineNumber
0, // aColumnNumber
&allowsInlineScript);
return (NS_SUCCEEDED(rv) && allowsInlineScript);
}
nsresult nsJSThunk::EvaluateScript(
nsIChannel* aChannel,
mozilla::dom::PopupBlocker::PopupControlState aPopupState,
uint32_t aExecutionPolicy, nsPIDOMWindowInner* aOriginalInnerWindow) {
if (aExecutionPolicy == nsIScriptChannel::NO_EXECUTION) {
// Nothing to do here.
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
NS_ENSURE_ARG_POINTER(aChannel);
MOZ_ASSERT(aOriginalInnerWindow,
"We should not have gotten here if this was null!");
// Set the channel's resultPrincipalURI to the active document's URI. This
// corresponds to treating that URI as the URI of our channel's response. In
// the spec we're supposed to use the URL of the active document, but since
// we bail out of here if the inner window has changed, and GetDocumentURI()
// on the inner window returns the URL of the active document if the inner
// window is current, this is equivalent to the spec behavior.
nsCOMPtr<nsIURI> docURI = aOriginalInnerWindow->GetDocumentURI();
if (!docURI) {
// We're not going to be able to have a sane URL, so just don't run the
// script at all.
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
loadInfo->SetResultPrincipalURI(docURI);
#ifdef DEBUG
DOMSecurityMonitor::AuditUseOfJavaScriptURI(aChannel);
#endif
// Get principal of code for execution
nsCOMPtr<nsISupports> owner;
aChannel->GetOwner(getter_AddRefs(owner));
nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(owner);
if (!principal) {
if (loadInfo->GetForceInheritPrincipal()) {
principal = loadInfo->FindPrincipalToInherit(aChannel);
} else {
// No execution without a principal!
NS_ASSERTION(!owner, "Non-principal owner?");
NS_WARNING("No principal to execute JS with");
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
nsresult rv;
// CSP check: javascript: URIs are disabled unless "inline" scripts
// are allowed by both the CSP of the thing that started the load
// (which is the CSPToInherit of the loadinfo) and the CSP of the
// target document. The target document check is performed below,
// once we have determined the target document.
nsCOMPtr<nsIContentSecurityPolicy> csp = loadInfo->GetCspToInherit();
nsAutoCString script(mScript);
// Unescape the script
NS_UnescapeURL(script);
if (!AllowedByCSP(csp, NS_ConvertASCIItoUTF16(script))) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
// Get the global object we should be running on.
nsIScriptGlobalObject* global = GetGlobalObject(aChannel);
if (!global) {
return NS_ERROR_FAILURE;
}
// Make sure we still have the same inner window as we used to.
nsCOMPtr<nsPIDOMWindowOuter> win = do_QueryInterface(global);
nsPIDOMWindowInner* innerWin = win->GetCurrentInnerWindow();
if (innerWin != aOriginalInnerWindow) {
return NS_ERROR_UNEXPECTED;
}
mozilla::dom::Document* targetDoc = innerWin->GetExtantDoc();
if (targetDoc) {
// Sandboxed document check: javascript: URI execution is disabled
// in a sandboxed document unless 'allow-scripts' was specified.
if (targetDoc->HasScriptsBlockedBySandbox()) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
// Perform a Security check against the CSP of the document we are
// running against. javascript: URIs are disabled unless "inline"
// scripts are allowed. We only do that if targetDoc->NodePrincipal()
// subsumes loadInfo->TriggeringPrincipal(). If it doesn't, then
// someone more-privileged (our UI or an extension) started the
// load and hence the load should not be subject to the target
// document's CSP.
//
// The "more privileged" assumption is safe, because if the triggering
// principal does not subsume targetDoc->NodePrincipal() we won't run the
// script at all. More precisely, we test that "principal" subsumes the
// target's principal, but "principal" should never be higher-privilege
// than the triggering principal here: it's either the triggering
// principal, or the principal of the document we started the load
// against if the triggering principal is system.
if (targetDoc->NodePrincipal()->Subsumes(loadInfo->TriggeringPrincipal())) {
nsCOMPtr<nsIContentSecurityPolicy> targetCSP = targetDoc->GetCsp();
if (!AllowedByCSP(targetCSP, NS_ConvertASCIItoUTF16(script))) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
}
// Push our popup control state
AutoPopupStatePusher popupStatePusher(aPopupState);
nsCOMPtr<nsIScriptGlobalObject> innerGlobal = do_QueryInterface(innerWin);
// So far so good: get the script context from its owner.
nsCOMPtr<nsIScriptContext> scriptContext = global->GetContext();
if (!scriptContext) return NS_ERROR_FAILURE;
// New script entry point required, due to the "Create a script" step of
// http://www.whatwg.org/specs/web-apps/current-work/#javascript-protocol
mozilla::nsAutoMicroTask mt;
AutoEntryScript aes(innerGlobal, "javascript: URI", true);
JSContext* cx = aes.cx();
JS::Rooted<JSObject*> globalJSObject(cx, innerGlobal->GetGlobalJSObject());
NS_ENSURE_TRUE(globalJSObject, NS_ERROR_UNEXPECTED);
//-- Don't execute unless the script principal subsumes the
// principal of the context.
nsIPrincipal* objectPrincipal =
nsContentUtils::ObjectPrincipal(globalJSObject);
bool subsumes;
rv = principal->Subsumes(objectPrincipal, &subsumes);
if (NS_FAILED(rv)) return rv;
if (!subsumes) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
// Fail if someone tries to execute in a global with system principal.
if (objectPrincipal->IsSystemPrincipal()) {
return NS_ERROR_DOM_SECURITY_ERR;
}
JS::Rooted<JS::Value> v(cx, JS::UndefinedValue());
// Finally, we have everything needed to evaluate the expression.
JS::CompileOptions options(cx);
options.setFileAndLine(mURL.get(), 1);
options.setIntroductionType("javascriptURL");
{
nsJSUtils::ExecutionContext exec(cx, globalJSObject);
exec.SetCoerceToString(true);
exec.Compile(options, NS_ConvertUTF8toUTF16(script));
rv = exec.ExecScript(&v);
}
js::AssertSameCompartment(cx, v);
if (NS_FAILED(rv) || !(v.isString() || v.isUndefined())) {
return NS_ERROR_MALFORMED_URI;
} else if (v.isUndefined()) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
} else {
MOZ_ASSERT(rv != NS_SUCCESS_DOM_SCRIPT_EVALUATION_THREW,
"How did we get a non-undefined return value?");
nsAutoJSString result;
if (!result.init(cx, v)) {
return NS_ERROR_OUT_OF_MEMORY;
}
char* bytes;
uint32_t bytesLen;
constexpr auto isoCharset = "windows-1252"_ns;
constexpr auto utf8Charset = "UTF-8"_ns;
const nsLiteralCString* charset;
if (IsISO88591(result)) {
// For compatibility, if the result is ISO-8859-1, we use
// windows-1252, so that people can compatibly create images
// using javascript: URLs.
bytes = ToNewCString(result, mozilla::fallible);
bytesLen = result.Length();
charset = &isoCharset;
} else {
bytes = ToNewUTF8String(result, &bytesLen);
charset = &utf8Charset;
}
aChannel->SetContentCharset(*charset);
if (bytes)
rv = NS_NewByteInputStream(getter_AddRefs(mInnerStream),
mozilla::Span(bytes, bytesLen),
NS_ASSIGNMENT_ADOPT);
else
rv = NS_ERROR_OUT_OF_MEMORY;
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
class nsJSChannel : public nsIChannel,
public nsIStreamListener,
public nsIScriptChannel,
public nsIPropertyBag2 {
public:
nsJSChannel();
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUEST
NS_DECL_NSICHANNEL
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSISCRIPTCHANNEL
NS_FORWARD_SAFE_NSIPROPERTYBAG(mPropertyBag)
NS_FORWARD_SAFE_NSIPROPERTYBAG2(mPropertyBag)
nsresult Init(nsIURI* aURI, nsILoadInfo* aLoadInfo);
// Actually evaluate the script.
void EvaluateScript();
protected:
virtual ~nsJSChannel();
nsresult StopAll();
void NotifyListener();
void CleanupStrongRefs();
nsCOMPtr<nsIChannel> mStreamChannel;
nsCOMPtr<nsIPropertyBag2> mPropertyBag;
nsCOMPtr<nsIStreamListener> mListener; // Our final listener
nsCOMPtr<nsPIDOMWindowInner> mOriginalInnerWindow; // The inner window our
// load started against.
// If we blocked onload on a document in AsyncOpen, this is the document we
// did it on.
RefPtr<mozilla::dom::Document> mDocumentOnloadBlockedOn;
nsresult mStatus; // Our status
nsLoadFlags mLoadFlags;
nsLoadFlags mActualLoadFlags; // See AsyncOpen
RefPtr<nsJSThunk> mIOThunk;
mozilla::dom::PopupBlocker::PopupControlState mPopupState;
uint32_t mExecutionPolicy;
bool mIsAsync;
bool mIsActive;
bool mOpenedStreamChannel;
};
nsJSChannel::nsJSChannel()
: mStatus(NS_OK),
mLoadFlags(LOAD_NORMAL),
mActualLoadFlags(LOAD_NORMAL),
mPopupState(mozilla::dom::PopupBlocker::openOverridden),
mExecutionPolicy(NO_EXECUTION),
mIsAsync(true),
mIsActive(false),
mOpenedStreamChannel(false) {}
nsJSChannel::~nsJSChannel() = default;
nsresult nsJSChannel::StopAll() {
nsresult rv = NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIWebNavigation> webNav;
NS_QueryNotificationCallbacks(mStreamChannel, webNav);
NS_ASSERTION(webNav, "Can't get nsIWebNavigation from channel!");
if (webNav) {
rv = webNav->Stop(nsIWebNavigation::STOP_ALL);
}
return rv;
}
nsresult nsJSChannel::Init(nsIURI* aURI, nsILoadInfo* aLoadInfo) {
RefPtr<nsJSURI> jsURI;
nsresult rv = aURI->QueryInterface(kJSURICID, getter_AddRefs(jsURI));
NS_ENSURE_SUCCESS(rv, rv);
// Create the nsIStreamIO layer used by the nsIStreamIOChannel.
mIOThunk = new nsJSThunk();
// Create a stock input stream channel...
// Remember, until AsyncOpen is called, the script will not be evaluated
// and the underlying Input Stream will not be created...
nsCOMPtr<nsIChannel> channel;
RefPtr<nsJSThunk> thunk = mIOThunk;
rv = NS_NewInputStreamChannelInternal(getter_AddRefs(channel), aURI,
thunk.forget(), "text/html"_ns, ""_ns,
aLoadInfo);
NS_ENSURE_SUCCESS(rv, rv);
rv = mIOThunk->Init(aURI);
if (NS_SUCCEEDED(rv)) {
mStreamChannel = channel;
mPropertyBag = do_QueryInterface(channel);
nsCOMPtr<nsIWritablePropertyBag2> writableBag = do_QueryInterface(channel);
if (writableBag && jsURI->GetBaseURI()) {
writableBag->SetPropertyAsInterface(u"baseURI"_ns, jsURI->GetBaseURI());
}
}
return rv;
}
NS_IMETHODIMP
nsJSChannel::GetIsDocument(bool* aIsDocument) {
return NS_GetIsDocumentChannel(this, aIsDocument);
}
//
// nsISupports implementation...
//
NS_IMPL_ISUPPORTS(nsJSChannel, nsIChannel, nsIRequest, nsIRequestObserver,
nsIStreamListener, nsIScriptChannel, nsIPropertyBag,
nsIPropertyBag2)
//
// nsIRequest implementation...
//
NS_IMETHODIMP
nsJSChannel::GetName(nsACString& aResult) {
return mStreamChannel->GetName(aResult);
}
NS_IMETHODIMP
nsJSChannel::IsPending(bool* aResult) {
*aResult = mIsActive;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::GetStatus(nsresult* aResult) {
if (NS_SUCCEEDED(mStatus) && mOpenedStreamChannel) {
return mStreamChannel->GetStatus(aResult);
}
*aResult = mStatus;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::Cancel(nsresult aStatus) {
mStatus = aStatus;
if (mOpenedStreamChannel) {
mStreamChannel->Cancel(aStatus);
}
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::GetCanceled(bool* aCanceled) {
nsresult status = NS_ERROR_FAILURE;
GetStatus(&status);
*aCanceled = NS_FAILED(status);
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::Suspend() { return mStreamChannel->Suspend(); }
NS_IMETHODIMP
nsJSChannel::Resume() { return mStreamChannel->Resume(); }
//
// nsIChannel implementation
//
NS_IMETHODIMP
nsJSChannel::GetOriginalURI(nsIURI** aURI) {
return mStreamChannel->GetOriginalURI(aURI);
}
NS_IMETHODIMP
nsJSChannel::SetOriginalURI(nsIURI* aURI) {
return mStreamChannel->SetOriginalURI(aURI);
}
NS_IMETHODIMP
nsJSChannel::GetURI(nsIURI** aURI) { return mStreamChannel->GetURI(aURI); }
NS_IMETHODIMP
nsJSChannel::Open(nsIInputStream** aStream) {
nsCOMPtr<nsIStreamListener> listener;
nsresult rv =
nsContentSecurityManager::doContentSecurityCheck(this, listener);
NS_ENSURE_SUCCESS(rv, rv);
rv = mIOThunk->EvaluateScript(mStreamChannel, mPopupState, mExecutionPolicy,
mOriginalInnerWindow);
NS_ENSURE_SUCCESS(rv, rv);
return mStreamChannel->Open(aStream);
}
NS_IMETHODIMP
nsJSChannel::AsyncOpen(nsIStreamListener* aListener) {
NS_ENSURE_ARG(aListener);
nsCOMPtr<nsIStreamListener> listener = aListener;
nsresult rv =
nsContentSecurityManager::doContentSecurityCheck(this, listener);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef DEBUG
{
nsCOMPtr<nsILoadInfo> loadInfo = nsIChannel::LoadInfo();
MOZ_ASSERT(!loadInfo || loadInfo->GetSecurityMode() == 0 ||
loadInfo->GetInitialSecurityCheckDone(),
"security flags in loadInfo but asyncOpen() not called");
}
#endif
// First make sure that we have a usable inner window; we'll want to make
// sure that we execute against that inner and no other.
nsIScriptGlobalObject* global = GetGlobalObject(this);
if (!global) {
return NS_ERROR_NOT_AVAILABLE;
}
nsCOMPtr<nsPIDOMWindowOuter> win(do_QueryInterface(global));
NS_ASSERTION(win, "Our global is not a window??");
// Make sure we create a new inner window if one doesn't already exist (see
// bug 306630).
mOriginalInnerWindow = win->EnsureInnerWindow();
if (!mOriginalInnerWindow) {
return NS_ERROR_NOT_AVAILABLE;
}
mListener = aListener;
mIsActive = true;
// Temporarily set the LOAD_BACKGROUND flag to suppress load group observer
// notifications (and hence nsIWebProgressListener notifications) from
// being dispatched. This is required since we suppress LOAD_DOCUMENT_URI,
// which means that the DocLoader would not generate document start and
// stop notifications (see bug 257875).
mActualLoadFlags = mLoadFlags;
mLoadFlags |= LOAD_BACKGROUND;
// Add the javascript channel to its loadgroup so that we know if
// network loads were canceled or not...
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
rv = loadGroup->AddRequest(this, nullptr);
if (NS_FAILED(rv)) {
mIsActive = false;
CleanupStrongRefs();
return rv;
}
}
mDocumentOnloadBlockedOn = mOriginalInnerWindow->GetExtantDoc();
if (mDocumentOnloadBlockedOn) {
// If we're a document channel, we need to actually block onload on our
// _parent_ document. This is because we don't actually set our
// LOAD_DOCUMENT_URI flag, so a docloader we're loading in as the
// document channel will claim to not be busy, and our parent's onload
// could fire too early.
nsLoadFlags loadFlags;
mStreamChannel->GetLoadFlags(&loadFlags);
if (loadFlags & LOAD_DOCUMENT_URI) {
mDocumentOnloadBlockedOn =
mDocumentOnloadBlockedOn->GetInProcessParentDocument();
}
}
if (mDocumentOnloadBlockedOn) {
mDocumentOnloadBlockedOn->BlockOnload();
}
mPopupState = mozilla::dom::PopupBlocker::GetPopupControlState();
void (nsJSChannel::*method)();
const char* name;
if (mIsAsync) {
// post an event to do the rest
method = &nsJSChannel::EvaluateScript;
name = "nsJSChannel::EvaluateScript";
} else {
EvaluateScript();
if (mOpenedStreamChannel) {
// That will handle notifying things
return NS_OK;
}
NS_ASSERTION(NS_FAILED(mStatus), "We should have failed _somehow_");
// mStatus is going to be NS_ERROR_DOM_RETVAL_UNDEFINED if we didn't
// have any content resulting from the execution and NS_BINDING_ABORTED
// if something we did causes our own load to be stopped. Return
// success in those cases, and error out in all others.
if (mStatus != NS_ERROR_DOM_RETVAL_UNDEFINED &&
mStatus != NS_BINDING_ABORTED) {
// Note that calling EvaluateScript() handled removing us from the
// loadgroup and marking us as not active anymore.
CleanupStrongRefs();
return mStatus;
}
// We're returning success from asyncOpen(), but we didn't open a
// stream channel. We'll have to notify ourselves, but make sure to do
// it asynchronously.
method = &nsJSChannel::NotifyListener;
name = "nsJSChannel::NotifyListener";
}
nsCOMPtr<nsIRunnable> runnable =
mozilla::NewRunnableMethod(name, this, method);
nsGlobalWindowInner* window = nsGlobalWindowInner::Cast(mOriginalInnerWindow);
rv = window->Dispatch(mozilla::TaskCategory::Other, runnable.forget());
if (NS_FAILED(rv)) {
loadGroup->RemoveRequest(this, nullptr, rv);
mIsActive = false;
CleanupStrongRefs();
}
return rv;
}
void nsJSChannel::EvaluateScript() {
// Synchronously execute the script...
// mIsActive is used to indicate the the request is 'busy' during the
// the script evaluation phase. This means that IsPending() will
// indicate the the request is busy while the script is executing...
// Note that we want to be in the loadgroup and pending while we evaluate
// the script, so that we find out if the loadgroup gets canceled by the
// script execution (in which case we shouldn't pump out data even if the
// script returns it).
if (NS_SUCCEEDED(mStatus)) {
nsresult rv = mIOThunk->EvaluateScript(
mStreamChannel, mPopupState, mExecutionPolicy, mOriginalInnerWindow);
// Note that evaluation may have canceled us, so recheck mStatus again
if (NS_FAILED(rv) && NS_SUCCEEDED(mStatus)) {
mStatus = rv;
}
}
// Remove the javascript channel from its loadgroup...
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
loadGroup->RemoveRequest(this, nullptr, mStatus);
}
// Reset load flags to their original value...
mLoadFlags = mActualLoadFlags;
// We're no longer active, it's now up to the stream channel to do
// the loading, if needed.
mIsActive = false;
if (NS_FAILED(mStatus)) {
if (mIsAsync) {
NotifyListener();
}
return;
}
// EvaluateScript() succeeded, and we were not canceled, that
// means there's data to parse as a result of evaluating the
// script.
// Get the stream channels load flags (!= mLoadFlags).
nsLoadFlags loadFlags;
mStreamChannel->GetLoadFlags(&loadFlags);
uint32_t disposition;
if (NS_FAILED(mStreamChannel->GetContentDisposition(&disposition)))
disposition = nsIChannel::DISPOSITION_INLINE;
if (loadFlags & LOAD_DOCUMENT_URI &&
disposition != nsIChannel::DISPOSITION_ATTACHMENT) {
// We're loaded as the document channel and not expecting to download
// the result. If we go on, we'll blow away the current document. Make
// sure that's ok. If so, stop all pending network loads.
nsCOMPtr<nsIDocShell> docShell;
NS_QueryNotificationCallbacks(mStreamChannel, docShell);
if (docShell) {
nsCOMPtr<nsIContentViewer> cv;
docShell->GetContentViewer(getter_AddRefs(cv));
if (cv) {
bool okToUnload;
if (NS_SUCCEEDED(cv->PermitUnload(&okToUnload)) && !okToUnload) {
// The user didn't want to unload the current
// page, translate this into an undefined
// return from the javascript: URL...
mStatus = NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
}
if (NS_SUCCEEDED(mStatus)) {
mStatus = StopAll();
}
}
if (NS_FAILED(mStatus)) {
if (mIsAsync) {
NotifyListener();
}
return;
}
mStatus = mStreamChannel->AsyncOpen(this);
if (NS_SUCCEEDED(mStatus)) {
// mStreamChannel will call OnStartRequest and OnStopRequest on
// us, so we'll be sure to call them on our listener.
mOpenedStreamChannel = true;
// Now readd ourselves to the loadgroup so we can receive
// cancellation notifications.
mIsActive = true;
if (loadGroup) {
mStatus = loadGroup->AddRequest(this, nullptr);
// If AddRequest failed, that's OK. The key is to make sure we get
// cancelled if needed, and that call just canceled us if it
// failed. We'll still get notified by the stream channel when it
// finishes.
}
} else if (mIsAsync) {
NotifyListener();
}
}
void nsJSChannel::NotifyListener() {
mListener->OnStartRequest(this);
mListener->OnStopRequest(this, mStatus);
CleanupStrongRefs();
}
void nsJSChannel::CleanupStrongRefs() {
mListener = nullptr;
mOriginalInnerWindow = nullptr;
if (mDocumentOnloadBlockedOn) {
mDocumentOnloadBlockedOn->UnblockOnload(false);
mDocumentOnloadBlockedOn = nullptr;
}
}
NS_IMETHODIMP
nsJSChannel::GetLoadFlags(nsLoadFlags* aLoadFlags) {
*aLoadFlags = mLoadFlags;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::SetLoadFlags(nsLoadFlags aLoadFlags) {
// Figure out whether the LOAD_BACKGROUND bit in aLoadFlags is
// actually right.
bool bogusLoadBackground = false;
if (mIsActive && !(mActualLoadFlags & LOAD_BACKGROUND) &&
(aLoadFlags & LOAD_BACKGROUND)) {
// We're getting a LOAD_BACKGROUND, but it's probably just our own fake
// flag being mirrored to us. The one exception is if our loadgroup is
// LOAD_BACKGROUND.
bool loadGroupIsBackground = false;
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
nsLoadFlags loadGroupFlags;
loadGroup->GetLoadFlags(&loadGroupFlags);
loadGroupIsBackground = ((loadGroupFlags & LOAD_BACKGROUND) != 0);
}
bogusLoadBackground = !loadGroupIsBackground;
}
// Since the javascript channel is never the actual channel that
// any data is loaded through, don't ever set the
// LOAD_DOCUMENT_URI flag on it, since that could lead to two
// 'document channels' in the loadgroup if a javascript: URL is
// loaded while a document is being loaded in the same window.
// XXXbz this, and a whole lot of other hackery, could go away if we'd just
// cancel the current document load on javascript: load start like IE does.
mLoadFlags = aLoadFlags & ~LOAD_DOCUMENT_URI;
if (bogusLoadBackground) {
aLoadFlags = aLoadFlags & ~LOAD_BACKGROUND;
}
mActualLoadFlags = aLoadFlags;
// ... but the underlying stream channel should get this bit, if
// set, since that'll be the real document channel if the
// javascript: URL generated data.
return mStreamChannel->SetLoadFlags(aLoadFlags);
}
NS_IMETHODIMP
nsJSChannel::GetTRRMode(nsIRequest::TRRMode* aTRRMode) {
return GetTRRModeImpl(aTRRMode);
}
NS_IMETHODIMP
nsJSChannel::SetTRRMode(nsIRequest::TRRMode aTRRMode) {
return SetTRRModeImpl(aTRRMode);
}
NS_IMETHODIMP
nsJSChannel::GetLoadGroup(nsILoadGroup** aLoadGroup) {
return mStreamChannel->GetLoadGroup(aLoadGroup);
}
NS_IMETHODIMP
nsJSChannel::SetLoadGroup(nsILoadGroup* aLoadGroup) {
if (aLoadGroup) {
bool streamPending;
nsresult rv = mStreamChannel->IsPending(&streamPending);
NS_ENSURE_SUCCESS(rv, rv);
if (streamPending) {
nsCOMPtr<nsILoadGroup> curLoadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(curLoadGroup));
if (aLoadGroup != curLoadGroup) {
// Move the stream channel to our new loadgroup. Make sure to
// add it before removing it, so that we don't trigger onload
// by accident.
aLoadGroup->AddRequest(mStreamChannel, nullptr);
if (curLoadGroup) {
curLoadGroup->RemoveRequest(mStreamChannel, nullptr,
NS_BINDING_RETARGETED);
}
}
}
}
return mStreamChannel->SetLoadGroup(aLoadGroup);
}
NS_IMETHODIMP
nsJSChannel::GetOwner(nsISupports** aOwner) {
return mStreamChannel->GetOwner(aOwner);
}
NS_IMETHODIMP
nsJSChannel::SetOwner(nsISupports* aOwner) {
return mStreamChannel->SetOwner(aOwner);
}
NS_IMETHODIMP
nsJSChannel::GetLoadInfo(nsILoadInfo** aLoadInfo) {
return mStreamChannel->GetLoadInfo(aLoadInfo);
}
NS_IMETHODIMP
nsJSChannel::SetLoadInfo(nsILoadInfo* aLoadInfo) {
MOZ_RELEASE_ASSERT(aLoadInfo, "loadinfo can't be null");
return mStreamChannel->SetLoadInfo(aLoadInfo);
}
NS_IMETHODIMP
nsJSChannel::GetNotificationCallbacks(nsIInterfaceRequestor** aCallbacks) {
return mStreamChannel->GetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsJSChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks) {
return mStreamChannel->SetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsJSChannel::GetSecurityInfo(nsISupports** aSecurityInfo) {
return mStreamChannel->GetSecurityInfo(aSecurityInfo);
}
NS_IMETHODIMP
nsJSChannel::GetContentType(nsACString& aContentType) {
return mStreamChannel->GetContentType(aContentType);
}
NS_IMETHODIMP
nsJSChannel::SetContentType(const nsACString& aContentType) {
return mStreamChannel->SetContentType(aContentType);
}
NS_IMETHODIMP
nsJSChannel::GetContentCharset(nsACString& aContentCharset) {
return mStreamChannel->GetContentCharset(aContentCharset);
}
NS_IMETHODIMP
nsJSChannel::SetContentCharset(const nsACString& aContentCharset) {
return mStreamChannel->SetContentCharset(aContentCharset);
}
NS_IMETHODIMP
nsJSChannel::GetContentDisposition(uint32_t* aContentDisposition) {
return mStreamChannel->GetContentDisposition(aContentDisposition);
}
NS_IMETHODIMP
nsJSChannel::SetContentDisposition(uint32_t aContentDisposition) {
return mStreamChannel->SetContentDisposition(aContentDisposition);
}
NS_IMETHODIMP
nsJSChannel::GetContentDispositionFilename(
nsAString& aContentDispositionFilename) {
return mStreamChannel->GetContentDispositionFilename(
aContentDispositionFilename);
}
NS_IMETHODIMP
nsJSChannel::SetContentDispositionFilename(
const nsAString& aContentDispositionFilename) {
return mStreamChannel->SetContentDispositionFilename(
aContentDispositionFilename);
}
NS_IMETHODIMP
nsJSChannel::GetContentDispositionHeader(
nsACString& aContentDispositionHeader) {
return mStreamChannel->GetContentDispositionHeader(aContentDispositionHeader);
}
NS_IMETHODIMP
nsJSChannel::GetContentLength(int64_t* aContentLength) {
return mStreamChannel->GetContentLength(aContentLength);
}
NS_IMETHODIMP
nsJSChannel::SetContentLength(int64_t aContentLength) {
return mStreamChannel->SetContentLength(aContentLength);
}
NS_IMETHODIMP
nsJSChannel::OnStartRequest(nsIRequest* aRequest) {