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// 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 "chrome/browser/media_galleries/fileapi/safe_media_metadata_parser.h"
#include "chrome/browser/extensions/blob_reader.h"
#include "chrome/common/extensions/chrome_utility_extensions_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/utility_process_host.h"
using content::BrowserThread;
namespace metadata {
SafeMediaMetadataParser::SafeMediaMetadataParser(
Profile* profile, const std::string& blob_uuid, int64 blob_size,
const std::string& mime_type, bool get_attached_images)
: profile_(profile),
blob_uuid_(blob_uuid),
blob_size_(blob_size),
mime_type_(mime_type),
get_attached_images_(get_attached_images),
parser_state_(INITIAL_STATE) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
void SafeMediaMetadataParser::Start(const DoneCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&SafeMediaMetadataParser::StartWorkOnIOThread, this,
callback));
}
SafeMediaMetadataParser::~SafeMediaMetadataParser() {
}
void SafeMediaMetadataParser::StartWorkOnIOThread(
const DoneCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK_EQ(INITIAL_STATE, parser_state_);
DCHECK(!callback.is_null());
callback_ = callback;
utility_process_host_ = content::UtilityProcessHost::Create(
this, base::MessageLoopProxy::current())->AsWeakPtr();
utility_process_host_->Send(
new ChromeUtilityMsg_ParseMediaMetadata(mime_type_, blob_size_,
get_attached_images_));
parser_state_ = STARTED_PARSING_STATE;
}
void SafeMediaMetadataParser::OnParseMediaMetadataFinished(
bool parse_success, const base::DictionaryValue& metadata_dictionary,
const std::vector<AttachedImage>& attached_images) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(!callback_.is_null());
if (parser_state_ != STARTED_PARSING_STATE)
return;
// We need to make a scoped copy of this vector since it will be destroyed
// at the end of the IPC message handler.
scoped_ptr<std::vector<metadata::AttachedImage> > attached_images_copy =
make_scoped_ptr(new std::vector<metadata::AttachedImage>(
attached_images));
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(callback_, parse_success,
base::Passed(make_scoped_ptr(metadata_dictionary.DeepCopy())),
base::Passed(&attached_images_copy)));
parser_state_ = FINISHED_PARSING_STATE;
}
void SafeMediaMetadataParser::OnUtilityProcessRequestBlobBytes(
int64 request_id, int64 byte_start, int64 length) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&SafeMediaMetadataParser::StartBlobReaderOnUIThread, this,
request_id, byte_start, length));
}
void SafeMediaMetadataParser::StartBlobReaderOnUIThread(
int64 request_id, int64 byte_start, int64 length) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// BlobReader is self-deleting.
BlobReader* reader = new BlobReader(profile_, blob_uuid_, base::Bind(
&SafeMediaMetadataParser::OnBlobReaderDoneOnUIThread, this, request_id));
reader->SetByteRange(byte_start, length);
reader->Start();
}
void SafeMediaMetadataParser::OnBlobReaderDoneOnUIThread(
int64 request_id, scoped_ptr<std::string> data,
int64 /* blob_total_size */) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&SafeMediaMetadataParser::FinishRequestBlobBytes, this,
request_id, base::Passed(data.Pass())));
}
void SafeMediaMetadataParser::FinishRequestBlobBytes(
int64 request_id, scoped_ptr<std::string> data) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
if (!utility_process_host_.get())
return;
utility_process_host_->Send(new ChromeUtilityMsg_RequestBlobBytes_Finished(
request_id, *data));
}
void SafeMediaMetadataParser::OnProcessCrashed(int exit_code) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(!callback_.is_null());
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(callback_, false,
base::Passed(scoped_ptr<base::DictionaryValue>()),
base::Passed(scoped_ptr<std::vector<AttachedImage> >())));
parser_state_ = FINISHED_PARSING_STATE;
}
bool SafeMediaMetadataParser::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SafeMediaMetadataParser, message)
IPC_MESSAGE_HANDLER(
ChromeUtilityHostMsg_ParseMediaMetadata_Finished,
OnParseMediaMetadataFinished)
IPC_MESSAGE_HANDLER(
ChromeUtilityHostMsg_RequestBlobBytes,
OnUtilityProcessRequestBlobBytes)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
} // namespace metadata
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