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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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 "RemoteStreamGetter.h"
#include "mozilla/MozPromise.h"
#include "mozilla/net/NeckoChild.h"
#include "mozilla/RefPtr.h"
#include "nsContentUtils.h"
#include "nsIInputStreamPump.h"
namespace mozilla {
namespace net {
NS_IMPL_ISUPPORTS(RemoteStreamGetter, nsICancelable)
RemoteStreamGetter::RemoteStreamGetter(nsIURI* aURI, nsILoadInfo* aLoadInfo)
: mURI(aURI), mLoadInfo(aLoadInfo) {
MOZ_ASSERT(aURI);
MOZ_ASSERT(aLoadInfo);
}
// Request an input stream from the parent.
RequestOrReason RemoteStreamGetter::GetAsync(nsIStreamListener* aListener,
nsIChannel* aChannel,
Method aMethod) {
MOZ_ASSERT(IsNeckoChild());
MOZ_ASSERT(aMethod);
mListener = aListener;
mChannel = aChannel;
nsCOMPtr<nsICancelable> cancelableRequest(this);
RefPtr<RemoteStreamGetter> self = this;
LoadInfoArgs loadInfoArgs;
nsresult rv = ipc::LoadInfoToLoadInfoArgs(mLoadInfo, &loadInfoArgs);
if (NS_FAILED(rv)) {
return Err(rv);
}
(gNeckoChild->*aMethod)(mURI, loadInfoArgs)
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self](const Maybe<RemoteStreamInfo>& info) { self->OnStream(info); },
[self](const mozilla::ipc::ResponseRejectReason) {
self->OnStream(Nothing());
});
return RequestOrCancelable(WrapNotNull(cancelableRequest));
}
// Called to cancel the ongoing async request.
NS_IMETHODIMP
RemoteStreamGetter::Cancel(nsresult aStatus) {
if (mCanceled) {
return NS_OK;
}
mCanceled = true;
mStatus = aStatus;
if (mPump) {
mPump->Cancel(aStatus);
mPump = nullptr;
}
return NS_OK;
}
// static
void RemoteStreamGetter::CancelRequest(nsIStreamListener* aListener,
nsIChannel* aChannel, nsresult aResult) {
MOZ_ASSERT(aListener);
MOZ_ASSERT(aChannel);
aListener->OnStartRequest(aChannel);
aListener->OnStopRequest(aChannel, aResult);
aChannel->CancelWithReason(NS_BINDING_ABORTED,
"RemoteStreamGetter::CancelRequest"_ns);
}
// Handle an input stream sent from the parent.
void RemoteStreamGetter::OnStream(const Maybe<RemoteStreamInfo>& aStreamInfo) {
MOZ_ASSERT(IsNeckoChild());
MOZ_ASSERT(mChannel);
MOZ_ASSERT(mListener);
nsCOMPtr<nsIChannel> channel = std::move(mChannel);
// We must keep an owning reference to the listener until we pass it on
// to AsyncRead.
nsCOMPtr<nsIStreamListener> listener = mListener.forget();
if (aStreamInfo.isNothing()) {
// The parent didn't send us back a stream.
CancelRequest(listener, channel, NS_ERROR_FILE_ACCESS_DENIED);
return;
}
if (mCanceled) {
// The channel that has created this stream getter has been canceled.
CancelRequest(listener, channel, mStatus);
return;
}
nsCOMPtr<nsIInputStream> stream = std::move(aStreamInfo.ref().inputStream());
if (!stream) {
// We somehow failed to get a stream, so just cancel the request.
CancelRequest(listener, channel, mStatus);
return;
}
nsCOMPtr<nsIInputStreamPump> pump;
nsresult rv =
NS_NewInputStreamPump(getter_AddRefs(pump), stream.forget(), 0, 0, false,
GetMainThreadSerialEventTarget());
if (NS_FAILED(rv)) {
CancelRequest(listener, channel, rv);
return;
}
channel->SetContentType(aStreamInfo.ref().contentType());
channel->SetContentLength(aStreamInfo.ref().contentLength());
rv = pump->AsyncRead(listener);
if (NS_FAILED(rv)) {
CancelRequest(listener, channel, rv);
return;
}
mPump = pump;
}
} // namespace net
} // namespace mozilla
|
