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// 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_itunes_library_parser.h"
#include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
#include "chrome/common/chrome_utility_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "ipc/ipc_platform_file.h"
using content::BrowserThread;
using content::UtilityProcessHost;
namespace itunes {
SafeITunesLibraryParser::SafeITunesLibraryParser(
const base::FilePath& itunes_library_file,
const ParserCallback& callback)
: itunes_library_file_(itunes_library_file),
callback_(callback),
parser_state_(INITIAL_STATE) {}
void SafeITunesLibraryParser::Start() {
DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
// |itunes_library_platform_file_| will be closed on the IO thread once it
// has been handed off to the child process.
itunes_library_platform_file_ = base::CreatePlatformFile(
itunes_library_file_,
base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
NULL, // created
NULL); // error_code
if (itunes_library_platform_file_ == base::kInvalidPlatformFileValue) {
VLOG(1) << "Could not open iTunes library XML file: "
<< itunes_library_file_.value();
callback_.Run(false /* failed */, parser::Library());
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&SafeITunesLibraryParser::OnOpenLibraryFileFailed, this));
return;
}
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&SafeITunesLibraryParser::StartProcessOnIOThread, this));
}
SafeITunesLibraryParser::~SafeITunesLibraryParser() {}
void SafeITunesLibraryParser::StartProcessOnIOThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(INITIAL_STATE, parser_state_);
scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
utility_process_host_ =
UtilityProcessHost::Create(this, message_loop_proxy.get())->AsWeakPtr();
// Wait for the startup notification before sending the main IPC to the
// utility process, so that we can dup the file handle.
utility_process_host_->Send(new ChromeUtilityMsg_StartupPing);
parser_state_ = PINGED_UTILITY_PROCESS_STATE;
}
void SafeITunesLibraryParser::OnUtilityProcessStarted() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (parser_state_ != PINGED_UTILITY_PROCESS_STATE)
return;
if (utility_process_host_->GetData().handle == base::kNullProcessHandle)
DLOG(ERROR) << "Child process handle is null";
utility_process_host_->Send(
new ChromeUtilityMsg_ParseITunesLibraryXmlFile(
IPC::GetFileHandleForProcess(
itunes_library_platform_file_,
utility_process_host_->GetData().handle,
true /* close_source_handle */)));
parser_state_ = STARTED_PARSING_STATE;
}
void SafeITunesLibraryParser::OnGotITunesLibrary(
bool result, const parser::Library& library) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (parser_state_ != STARTED_PARSING_STATE)
return;
MediaFileSystemBackend::MediaTaskRunner()->PostTask(
FROM_HERE,
base::Bind(callback_, result, library));
parser_state_ = FINISHED_PARSING_STATE;
}
void SafeITunesLibraryParser::OnOpenLibraryFileFailed() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
parser_state_ = FINISHED_PARSING_STATE;
}
void SafeITunesLibraryParser::OnProcessCrashed(int exit_code) {
OnGotITunesLibrary(false /* failed */, parser::Library());
}
bool SafeITunesLibraryParser::OnMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SafeITunesLibraryParser, message)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ProcessStarted,
OnUtilityProcessStarted)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GotITunesLibrary,
OnGotITunesLibrary)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
} // namespace itunes
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