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
|
// 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/browser/script_executor.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/pickle.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/script_execution_observer.h"
#include "extensions/common/extension_messages.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_message_macros.h"
namespace base {
class ListValue;
} // namespace base
namespace extensions {
namespace {
const char* kRendererDestroyed = "The tab was closed.";
// A handler for a single injection request. On creation this will send the
// injection request to the renderer, and it will be destroyed after either the
// corresponding response comes from the renderer, or the renderer is destroyed.
class Handler : public content::WebContentsObserver {
public:
Handler(base::ObserverList<ScriptExecutionObserver>* script_observers,
content::WebContents* web_contents,
const ExtensionMsg_ExecuteCode_Params& params,
ScriptExecutor::FrameScope scope,
const ScriptExecutor::ExecuteScriptCallback& callback)
: content::WebContentsObserver(web_contents),
script_observers_(AsWeakPtr(script_observers)),
host_id_(params.host_id),
request_id_(params.request_id),
callback_(callback) {
if (scope == ScriptExecutor::ALL_FRAMES) {
web_contents->ForEachFrame(base::Bind(&Handler::SendExecuteCode,
base::Unretained(this), params));
} else {
SendExecuteCode(params, web_contents->GetMainFrame());
}
}
private:
// This class manages its own lifetime.
~Handler() override {}
// content::WebContentsObserver:
void WebContentsDestroyed() override { Finish(); }
bool OnMessageReceived(const IPC::Message& message,
content::RenderFrameHost* render_frame_host) override {
// Unpack by hand to check the request_id, since there may be multiple
// requests in flight but only one is for this.
if (message.type() != ExtensionHostMsg_ExecuteCodeFinished::ID)
return false;
int message_request_id;
base::PickleIterator iter(message);
CHECK(iter.ReadInt(&message_request_id));
if (message_request_id != request_id_)
return false;
IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(Handler, message, render_frame_host)
IPC_MESSAGE_HANDLER(ExtensionHostMsg_ExecuteCodeFinished,
OnExecuteCodeFinished)
IPC_END_MESSAGE_MAP()
return true;
}
void RenderFrameDeleted(
content::RenderFrameHost* render_frame_host) override {
if (pending_render_frames_.erase(render_frame_host) == 1 &&
pending_render_frames_.empty()) {
Finish();
}
}
// Sends an ExecuteCode message to the given frame host, and increments
// the number of pending messages.
void SendExecuteCode(const ExtensionMsg_ExecuteCode_Params& params,
content::RenderFrameHost* frame) {
pending_render_frames_.insert(frame);
frame->Send(new ExtensionMsg_ExecuteCode(frame->GetRoutingID(), params));
}
// Handles the ExecuteCodeFinished message.
void OnExecuteCodeFinished(content::RenderFrameHost* render_frame_host,
int request_id,
const std::string& error,
const GURL& on_url,
const base::ListValue& result_list) {
DCHECK_EQ(request_id_, request_id);
DCHECK(!pending_render_frames_.empty());
bool erased = pending_render_frames_.erase(render_frame_host) == 1;
DCHECK(erased);
bool is_main_frame = web_contents()->GetMainFrame() == render_frame_host;
// Set the result, if there is one.
const base::Value* script_value = nullptr;
if (result_list.Get(0u, &script_value)) {
// If this is the main result, we put it at index 0. Otherwise, we just
// append it at the end.
if (is_main_frame && !results_.empty())
CHECK(results_.Insert(0u, script_value->DeepCopy()));
else
results_.Append(script_value->DeepCopy());
}
if (is_main_frame) { // Only use the main frame's error and url.
main_frame_error_ = error;
main_frame_url_ = on_url;
}
// Wait until the final request finishes before reporting back.
if (pending_render_frames_.empty())
Finish();
}
void Finish() {
if (main_frame_url_.is_empty()) {
// We never finished the main frame injection.
main_frame_error_ = kRendererDestroyed;
results_.Clear();
}
if (script_observers_.get() && main_frame_error_.empty() &&
host_id_.type() == HostID::EXTENSIONS) {
ScriptExecutionObserver::ExecutingScriptsMap id_map;
id_map[host_id_.id()] = std::set<std::string>();
FOR_EACH_OBSERVER(
ScriptExecutionObserver, *script_observers_,
OnScriptsExecuted(web_contents(), id_map, main_frame_url_));
}
if (!callback_.is_null())
callback_.Run(main_frame_error_, main_frame_url_, results_);
delete this;
}
base::WeakPtr<base::ObserverList<ScriptExecutionObserver>> script_observers_;
// The id of the host (the extension or the webui) doing the injection.
HostID host_id_;
// The request id of the injection.
int request_id_;
// The hosts of the still-running injections.
std::set<content::RenderFrameHost*> pending_render_frames_;
// The results of the injection.
base::ListValue results_;
// The error from injecting into the main frame.
std::string main_frame_error_;
// The url of the main frame.
GURL main_frame_url_;
// The callback to run after all injections complete.
ScriptExecutor::ExecuteScriptCallback callback_;
DISALLOW_COPY_AND_ASSIGN(Handler);
};
} // namespace
ScriptExecutionObserver::~ScriptExecutionObserver() {
}
ScriptExecutor::ScriptExecutor(
content::WebContents* web_contents,
base::ObserverList<ScriptExecutionObserver>* script_observers)
: next_request_id_(0),
web_contents_(web_contents),
script_observers_(script_observers) {
CHECK(web_contents_);
}
ScriptExecutor::~ScriptExecutor() {
}
void ScriptExecutor::ExecuteScript(const HostID& host_id,
ScriptExecutor::ScriptType script_type,
const std::string& code,
ScriptExecutor::FrameScope frame_scope,
ScriptExecutor::MatchAboutBlank about_blank,
UserScript::RunLocation run_at,
ScriptExecutor::WorldType world_type,
ScriptExecutor::ProcessType process_type,
const GURL& webview_src,
const GURL& file_url,
bool user_gesture,
ScriptExecutor::ResultType result_type,
const ExecuteScriptCallback& callback) {
if (host_id.type() == HostID::EXTENSIONS) {
// Don't execute if the extension has been unloaded.
const Extension* extension =
ExtensionRegistry::Get(web_contents_->GetBrowserContext())
->enabled_extensions().GetByID(host_id.id());
if (!extension)
return;
} else {
CHECK(process_type == WEB_VIEW_PROCESS);
}
ExtensionMsg_ExecuteCode_Params params;
params.request_id = next_request_id_++;
params.host_id = host_id;
params.is_javascript = (script_type == JAVASCRIPT);
params.code = code;
params.match_about_blank = (about_blank == MATCH_ABOUT_BLANK);
params.run_at = static_cast<int>(run_at);
params.in_main_world = (world_type == MAIN_WORLD);
params.is_web_view = (process_type == WEB_VIEW_PROCESS);
params.webview_src = webview_src;
params.file_url = file_url;
params.wants_result = (result_type == JSON_SERIALIZED_RESULT);
params.user_gesture = user_gesture;
// Handler handles IPCs and deletes itself on completion.
new Handler(script_observers_, web_contents_, params, frame_scope, callback);
}
} // namespace extensions
|
