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
|
// Copyright 2013 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 "chrome/browser/media_galleries/fileapi/safe_audio_video_checker.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/process/process_handle.h"
#include "chrome/common/chrome_utility_messages.h"
#include "chrome/common/extensions/chrome_utility_extensions_messages.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/utility_process_host.h"
#include "content/public/browser/browser_thread.h"
#include "ipc/ipc_message_macros.h"
#include "ipc/ipc_platform_file.h"
SafeAudioVideoChecker::SafeAudioVideoChecker(
base::File file,
const storage::CopyOrMoveFileValidator::ResultCallback& callback)
: state_(INITIAL_STATE), file_(file.Pass()), callback_(callback) {
DCHECK(!callback.is_null());
}
void SafeAudioVideoChecker::Start() {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
if (state_ != INITIAL_STATE)
return;
state_ = PINGED_STATE;
if (!file_.IsValid()) {
callback_.Run(base::File::FILE_ERROR_SECURITY);
state_ = FINISHED_STATE;
return;
}
utility_process_host_ = content::UtilityProcessHost::Create(
this, base::MessageLoopProxy::current())->AsWeakPtr();
utility_process_host_->Send(new ChromeUtilityMsg_StartupPing);
}
SafeAudioVideoChecker::~SafeAudioVideoChecker() {}
void SafeAudioVideoChecker::OnProcessStarted() {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
if (state_ != PINGED_STATE)
return;
state_ = STARTED_STATE;
if (utility_process_host_->GetData().handle == base::kNullProcessHandle)
DLOG(ERROR) << "Child process handle is null";
IPC::PlatformFileForTransit file_for_transit =
IPC::TakeFileHandleForProcess(file_.Pass(),
utility_process_host_->GetData().handle);
if (file_for_transit == IPC::InvalidPlatformFileForTransit()) {
OnCheckingFinished(false /* valid? */);
return;
}
const int64 kFileDecodeTimeInMS = 250;
utility_process_host_->Send(new ChromeUtilityMsg_CheckMediaFile(
kFileDecodeTimeInMS, file_for_transit));
}
void SafeAudioVideoChecker::OnCheckingFinished(bool valid) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
if (state_ != STARTED_STATE)
return;
state_ = FINISHED_STATE;
callback_.Run(valid ? base::File::FILE_OK :
base::File::FILE_ERROR_SECURITY);
}
void SafeAudioVideoChecker::OnProcessCrashed(int exit_code) {
OnCheckingFinished(false);
}
bool SafeAudioVideoChecker::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SafeAudioVideoChecker, message)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ProcessStarted,
OnProcessStarted)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_CheckMediaFile_Finished,
OnCheckingFinished)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
|
