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// Copyright (c) 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 "content/browser/android/url_request_content_job.h"
#include "base/android/content_uri_utils.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/message_loop/message_loop.h"
#include "base/task_runner.h"
#include "net/base/file_stream.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/http/http_util.h"
#include "net/url_request/url_request_error_job.h"
#include "url/gurl.h"
namespace content {
// TODO(qinmin): Refactor this class to reuse the common code in
// url_request_file_job.cc.
URLRequestContentJob::ContentMetaInfo::ContentMetaInfo()
: content_exists(false),
content_size(0) {
}
URLRequestContentJob::URLRequestContentJob(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
const base::FilePath& content_path,
const scoped_refptr<base::TaskRunner>& content_task_runner)
: net::URLRequestJob(request, network_delegate),
content_path_(content_path),
stream_(new net::FileStream(content_task_runner)),
content_task_runner_(content_task_runner),
remaining_bytes_(0),
io_pending_(false),
weak_ptr_factory_(this) {}
void URLRequestContentJob::Start() {
ContentMetaInfo* meta_info = new ContentMetaInfo();
content_task_runner_->PostTaskAndReply(
FROM_HERE,
base::Bind(&URLRequestContentJob::FetchMetaInfo, content_path_,
base::Unretained(meta_info)),
base::Bind(&URLRequestContentJob::DidFetchMetaInfo,
weak_ptr_factory_.GetWeakPtr(),
base::Owned(meta_info)));
}
void URLRequestContentJob::Kill() {
stream_.reset();
weak_ptr_factory_.InvalidateWeakPtrs();
net::URLRequestJob::Kill();
}
bool URLRequestContentJob::ReadRawData(net::IOBuffer* dest,
int dest_size,
int* bytes_read) {
DCHECK_GT(dest_size, 0);
DCHECK(bytes_read);
DCHECK_GE(remaining_bytes_, 0);
if (remaining_bytes_ < dest_size)
dest_size = static_cast<int>(remaining_bytes_);
// If we should copy zero bytes because |remaining_bytes_| is zero, short
// circuit here.
if (!dest_size) {
*bytes_read = 0;
return true;
}
int rv =
stream_->Read(dest, dest_size, base::Bind(&URLRequestContentJob::DidRead,
weak_ptr_factory_.GetWeakPtr(),
make_scoped_refptr(dest)));
if (rv >= 0) {
// Data is immediately available.
*bytes_read = rv;
remaining_bytes_ -= rv;
DCHECK_GE(remaining_bytes_, 0);
return true;
}
// Otherwise, a read error occured. We may just need to wait...
if (rv == net::ERR_IO_PENDING) {
io_pending_ = true;
SetStatus(net::URLRequestStatus(net::URLRequestStatus::IO_PENDING, 0));
} else {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED, rv));
}
return false;
}
bool URLRequestContentJob::IsRedirectResponse(GURL* location,
int* http_status_code) {
return false;
}
bool URLRequestContentJob::GetMimeType(std::string* mime_type) const {
DCHECK(request_);
if (!meta_info_.mime_type.empty()) {
*mime_type = meta_info_.mime_type;
return true;
}
return false;
}
void URLRequestContentJob::SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) {
std::string range_header;
if (!headers.GetHeader(net::HttpRequestHeaders::kRange, &range_header))
return;
// We only care about "Range" header here.
std::vector<net::HttpByteRange> ranges;
if (net::HttpUtil::ParseRangeHeader(range_header, &ranges)) {
if (ranges.size() == 1) {
byte_range_ = ranges[0];
} else {
// We don't support multiple range requests.
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
}
}
}
URLRequestContentJob::~URLRequestContentJob() {}
void URLRequestContentJob::FetchMetaInfo(const base::FilePath& content_path,
ContentMetaInfo* meta_info) {
base::File::Info file_info;
meta_info->content_exists = base::GetFileInfo(content_path, &file_info);
if (meta_info->content_exists) {
meta_info->content_size = file_info.size;
meta_info->mime_type = base::GetContentUriMimeType(content_path);
}
}
void URLRequestContentJob::DidFetchMetaInfo(const ContentMetaInfo* meta_info) {
meta_info_ = *meta_info;
if (!meta_info_.content_exists) {
DidOpen(net::ERR_FILE_NOT_FOUND);
return;
}
int flags = base::File::FLAG_OPEN |
base::File::FLAG_READ |
base::File::FLAG_ASYNC;
int rv = stream_->Open(content_path_, flags,
base::Bind(&URLRequestContentJob::DidOpen,
weak_ptr_factory_.GetWeakPtr()));
if (rv != net::ERR_IO_PENDING)
DidOpen(rv);
}
void URLRequestContentJob::DidOpen(int result) {
if (result != net::OK) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED, result));
return;
}
if (!byte_range_.ComputeBounds(meta_info_.content_size)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return;
}
remaining_bytes_ = byte_range_.last_byte_position() -
byte_range_.first_byte_position() + 1;
DCHECK_GE(remaining_bytes_, 0);
if (remaining_bytes_ > 0 && byte_range_.first_byte_position() != 0) {
int rv = stream_->Seek(byte_range_.first_byte_position(),
base::Bind(&URLRequestContentJob::DidSeek,
weak_ptr_factory_.GetWeakPtr()));
if (rv != net::ERR_IO_PENDING) {
// stream_->Seek() failed, so pass an intentionally erroneous value
// into DidSeek().
DidSeek(-1);
}
} else {
// We didn't need to call stream_->Seek() at all, so we pass to DidSeek()
// the value that would mean seek success. This way we skip the code
// handling seek failure.
DidSeek(byte_range_.first_byte_position());
}
}
void URLRequestContentJob::DidSeek(int64 result) {
if (result != byte_range_.first_byte_position()) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return;
}
set_expected_content_size(remaining_bytes_);
NotifyHeadersComplete();
}
void URLRequestContentJob::DidRead(scoped_refptr<net::IOBuffer> buf,
int result) {
if (result > 0) {
SetStatus(net::URLRequestStatus()); // Clear the IO_PENDING status
remaining_bytes_ -= result;
DCHECK_GE(remaining_bytes_, 0);
}
DCHECK(io_pending_);
io_pending_ = false;
if (result == 0) {
NotifyDone(net::URLRequestStatus());
} else if (result < 0) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED, result));
}
NotifyReadComplete(result);
}
} // namespace content
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