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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "RemoteImageProtocolHandler.h"
#include "imgITools.h"
#include "nsContentUtils.h"
#include "nsIPipe.h"
#include "nsIURI.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "nsStreamUtils.h"
#include "nsURLHelper.h"
#include "mozilla/dom/ipc/IdType.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentProcessManager.h"
#include "mozilla/gfx/2D.h"
namespace mozilla::image {
using mozilla::dom::ContentParent;
using mozilla::dom::ContentParentId;
using mozilla::dom::ContentProcessManager;
using mozilla::dom::UniqueContentParentKeepAlive;
StaticRefPtr<RemoteImageProtocolHandler> RemoteImageProtocolHandler::sSingleton;
NS_IMPL_ISUPPORTS(RemoteImageProtocolHandler, nsIProtocolHandler,
nsISupportsWeakReference);
NS_IMETHODIMP RemoteImageProtocolHandler::GetScheme(nsACString& aScheme) {
aScheme.AssignLiteral("moz-remote-image");
return NS_OK;
}
NS_IMETHODIMP RemoteImageProtocolHandler::AllowPort(int32_t, const char*,
bool* aAllow) {
*aAllow = false;
return NS_OK;
}
static UniqueContentParentKeepAlive GetLaunchingContentParentForDecode(
const Maybe<ContentParentId>& aContentParentId) {
if (aContentParentId.isSome()) {
if (ContentProcessManager* cpm = ContentProcessManager::GetSingleton()) {
if (ContentParent* cp = cpm->GetContentProcessById(*aContentParentId)) {
return cp->TryAddKeepAlive(/* aBrowserId */ 0);
}
}
}
// We use the extension process as a fallback, because
// it is usually running, and should be OK to parse images.
return ContentParent::GetNewOrUsedLaunchingBrowserProcess(
EXTENSION_REMOTE_TYPE,
/* aGroup */ nullptr,
/* aPriority */ hal::PROCESS_PRIORITY_FOREGROUND,
/* aPreferUsed */ true);
}
static nsresult EncodeImage(const dom::IPCImage& aImage,
nsIAsyncOutputStream* aOutputStream) {
// TODO(Bug 1997538): Use the internal image/icon format for the
// moz-remote-image: protocol
nsresult rv;
nsCOMPtr<imgITools> imgTools =
do_GetService("@mozilla.org/image/tools;1", &rv);
MOZ_TRY(rv);
nsCOMPtr<imgIContainer> imgContainer =
nsContentUtils::IPCImageToImage(aImage);
if (!imgContainer) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIInputStream> stream;
MOZ_TRY(imgTools->EncodeImage(imgContainer, nsLiteralCString(IMAGE_PNG),
u"png-zlib-level=0"_ns,
getter_AddRefs(stream)));
nsCOMPtr<nsIEventTarget> target =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID, &rv);
MOZ_TRY(rv);
return NS_AsyncCopy(stream, aOutputStream, target);
}
static void AsyncReEncodeImage(nsIURI* aRemoteURI, ImageIntSize aSize,
const Maybe<ContentParentId> aContentParentId,
nsIAsyncOutputStream* aOutputStream) {
UniqueContentParentKeepAlive cp =
GetLaunchingContentParentForDecode(aContentParentId);
if (NS_WARN_IF(!cp)) {
aOutputStream->CloseWithStatus(NS_ERROR_FAILURE);
return;
}
cp->WaitForLaunchAsync()
->Then(
GetCurrentSerialEventTarget(), __func__,
[remoteURI = nsCOMPtr{aRemoteURI},
aSize](UniqueContentParentKeepAlive&& aCp) {
return aCp->SendDecodeImage(WrapNotNull(remoteURI), aSize);
},
[](nsresult aError) {
return ContentParent::DecodeImagePromise::CreateAndReject(
ipc::ResponseRejectReason::SendError, __func__);
})
->Then(
GetCurrentSerialEventTarget(), __func__,
[cp = std::move(cp), outputStream = nsCOMPtr{aOutputStream},
aSize](const std::tuple<nsresult, mozilla::Maybe<dom::IPCImage>>&
aResult) {
nsresult rv = std::get<0>(aResult);
const mozilla::Maybe<dom::IPCImage>& image = std::get<1>(aResult);
if (NS_FAILED(rv)) {
outputStream->CloseWithStatus(rv);
return;
}
if (image.isNothing()) {
outputStream->CloseWithStatus(NS_ERROR_UNEXPECTED);
return;
}
// Make sure the image size matches if a specific size was
// requested.
if (aSize.Width() && aSize.Height() && image->size() != aSize) {
outputStream->CloseWithStatus(NS_ERROR_UNEXPECTED);
return;
}
rv = EncodeImage(*image, outputStream);
if (NS_FAILED(rv)) {
outputStream->CloseWithStatus(rv);
}
},
[outputStream =
nsCOMPtr{aOutputStream}](mozilla::ipc::ResponseRejectReason) {
outputStream->CloseWithStatus(NS_ERROR_FAILURE);
});
}
// Parse out the relevant parts of the moz-remote-image URL
static nsresult ParseURI(nsIURI* aURI, nsIURI** aRemoteURI, ImageIntSize* aSize,
Maybe<ContentParentId>& aContentParentId) {
MOZ_ASSERT(aURI->SchemeIs("moz-remote-image"));
nsAutoCString query;
MOZ_TRY(aURI->GetQuery(query));
bool hasURL;
int32_t width = 0;
int32_t height = 0;
bool ok = URLParams::Parse(
query, true, [&](const nsACString& aName, const nsACString& aValue) {
nsresult rv;
if (aName.EqualsLiteral("url")) {
hasURL = true;
rv = NS_NewURI(aRemoteURI, aValue);
if (NS_FAILED(rv)) {
return false;
}
} else if (aName.EqualsLiteral("width")) {
width = aValue.ToInteger(&rv);
if (NS_FAILED(rv) || width < 0) {
return false;
}
} else if (aName.EqualsLiteral("height")) {
height = aValue.ToInteger(&rv);
if (NS_FAILED(rv) || height < 0) {
return false;
}
} else if (aName.EqualsLiteral("contentParentId")) {
int64_t id = aValue.ToInteger(&rv);
if (NS_FAILED(rv) || id < 0) {
return false;
}
aContentParentId = Some(ContentParentId(uint64_t(id)));
}
return true;
});
if (NS_WARN_IF(!ok || !hasURL)) {
return NS_ERROR_DOM_MALFORMED_URI;
}
*aSize = ImageIntSize(width, height);
return NS_OK;
}
NS_IMETHODIMP RemoteImageProtocolHandler::NewChannel(nsIURI* aURI,
nsILoadInfo* aLoadInfo,
nsIChannel** aOutChannel) {
if (!aLoadInfo->TriggeringPrincipal()->IsSystemPrincipal()) {
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsIURI> remoteURI;
ImageIntSize size;
Maybe<ContentParentId> contentParentId;
MOZ_TRY(ParseURI(aURI, getter_AddRefs(remoteURI), &size, contentParentId));
nsCOMPtr<nsIAsyncInputStream> pipeIn;
nsCOMPtr<nsIAsyncOutputStream> pipeOut;
NS_NewPipe2(getter_AddRefs(pipeIn), getter_AddRefs(pipeOut), true, true);
nsCOMPtr<nsIChannel> channel;
MOZ_TRY(NS_NewInputStreamChannelInternal(
getter_AddRefs(channel), aURI, pipeIn.forget(),
/* aContentType */ nsLiteralCString(IMAGE_PNG),
/* aContentCharset */ ""_ns, aLoadInfo));
AsyncReEncodeImage(remoteURI, size, contentParentId, pipeOut);
channel.forget(aOutChannel);
return NS_OK;
}
} // namespace mozilla::image
|
