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// Copyright (c) 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 "net/url_request/url_fetcher_response_writer.h"
#include "base/file_util.h"
#include "base/location.h"
#include "base/task_runner.h"
#include "base/task_runner_util.h"
#include "net/base/file_stream.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace net {
URLFetcherStringWriter::URLFetcherStringWriter(std::string* string)
: string_(string) {
}
URLFetcherStringWriter::~URLFetcherStringWriter() {
}
int URLFetcherStringWriter::Initialize(const CompletionCallback& callback) {
// Do nothing.
return OK;
}
int URLFetcherStringWriter::Write(IOBuffer* buffer,
int num_bytes,
const CompletionCallback& callback) {
string_->append(buffer->data(), num_bytes);
return num_bytes;
}
int URLFetcherStringWriter::Finish(const CompletionCallback& callback) {
// Do nothing.
return OK;
}
URLFetcherFileWriter::URLFetcherFileWriter(
scoped_refptr<base::TaskRunner> file_task_runner)
: error_code_(OK),
weak_factory_(this),
file_task_runner_(file_task_runner),
owns_file_(false),
total_bytes_written_(0) {
DCHECK(file_task_runner_.get());
}
URLFetcherFileWriter::~URLFetcherFileWriter() {
CloseAndDeleteFile();
}
int URLFetcherFileWriter::Initialize(const CompletionCallback& callback) {
DCHECK(!file_stream_);
DCHECK(!owns_file_);
file_stream_.reset(new FileStream(NULL));
int result = ERR_IO_PENDING;
if (file_path_.empty()) {
base::FilePath* temp_file_path = new base::FilePath;
base::PostTaskAndReplyWithResult(
file_task_runner_.get(),
FROM_HERE,
base::Bind(&file_util::CreateTemporaryFile, temp_file_path),
base::Bind(&URLFetcherFileWriter::DidCreateTempFile,
weak_factory_.GetWeakPtr(),
callback,
base::Owned(temp_file_path)));
} else {
result = file_stream_->Open(
file_path_,
base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_ASYNC |
base::PLATFORM_FILE_CREATE_ALWAYS,
base::Bind(&URLFetcherFileWriter::DidOpenFile,
weak_factory_.GetWeakPtr(),
callback));
DCHECK_NE(OK, result);
if (result != ERR_IO_PENDING)
error_code_ = result;
}
return result;
}
int URLFetcherFileWriter::Write(IOBuffer* buffer,
int num_bytes,
const CompletionCallback& callback) {
DCHECK(file_stream_);
DCHECK(owns_file_);
int result = file_stream_->Write(buffer, num_bytes,
base::Bind(&URLFetcherFileWriter::DidWrite,
weak_factory_.GetWeakPtr(),
callback));
if (result < 0 && result != ERR_IO_PENDING) {
error_code_ = result;
CloseAndDeleteFile();
}
return result;
}
int URLFetcherFileWriter::Finish(const CompletionCallback& callback) {
int result = file_stream_->Close(base::Bind(
&URLFetcherFileWriter::CloseComplete,
weak_factory_.GetWeakPtr(), callback));
if (result != ERR_IO_PENDING)
file_stream_.reset();
return result;
}
void URLFetcherFileWriter::CloseComplete(const CompletionCallback& callback,
int result) {
// Destroy |file_stream_| whether or not the close succeeded.
file_stream_.reset();
callback.Run(result);
}
void URLFetcherFileWriter::DidWrite(const CompletionCallback& callback,
int result) {
if (result < 0) {
error_code_ = result;
CloseAndDeleteFile();
}
callback.Run(result);
}
void URLFetcherFileWriter::DisownFile() {
// Disowning is done by the delegate's OnURLFetchComplete method.
// The file should be closed by the time that method is called.
DCHECK(!file_stream_);
owns_file_ = false;
}
void URLFetcherFileWriter::CloseAndDeleteFile() {
if (!owns_file_)
return;
file_stream_.reset();
DisownFile();
file_task_runner_->PostTask(FROM_HERE,
base::Bind(base::IgnoreResult(&base::DeleteFile),
file_path_,
false /* recursive */));
}
void URLFetcherFileWriter::DidCreateTempFile(const CompletionCallback& callback,
base::FilePath* temp_file_path,
bool success) {
if (!success) {
error_code_ = ERR_FILE_NOT_FOUND;
callback.Run(error_code_);
return;
}
file_path_ = *temp_file_path;
owns_file_ = true;
const int result = file_stream_->Open(
file_path_,
base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_ASYNC |
base::PLATFORM_FILE_OPEN,
base::Bind(&URLFetcherFileWriter::DidOpenFile,
weak_factory_.GetWeakPtr(),
callback));
if (result != ERR_IO_PENDING)
DidOpenFile(callback, result);
}
void URLFetcherFileWriter::DidOpenFile(const CompletionCallback& callback,
int result) {
if (result == OK) {
total_bytes_written_ = 0;
owns_file_ = true;
} else {
error_code_ = result;
CloseAndDeleteFile();
}
callback.Run(result);
}
} // namespace net
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