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// Copyright (c) 2011 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.
#ifndef WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
#define WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_callback_factory.h"
#include "base/memory/scoped_ptr.h"
#include "base/platform_file.h"
#include "base/task.h"
#include "net/base/completion_callback.h"
#include "net/http/http_byte_range.h"
#include "net/url_request/url_request_job.h"
#include "webkit/blob/blob_data.h"
namespace base {
class MessageLoopProxy;
struct PlatformFileInfo;
}
namespace net {
class FileStream;
}
namespace webkit_blob {
// A request job that handles reading blob URLs.
class BlobURLRequestJob : public net::URLRequestJob {
public:
BlobURLRequestJob(net::URLRequest* request,
BlobData* blob_data,
base::MessageLoopProxy* resolving_message_loop_proxy);
virtual ~BlobURLRequestJob();
// net::URLRequestJob methods.
virtual void Start();
virtual void Kill();
virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read);
virtual bool GetMimeType(std::string* mime_type) const;
virtual void GetResponseInfo(net::HttpResponseInfo* info);
virtual int GetResponseCode() const;
virtual void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers);
private:
void CloseStream();
void ResolveFile(const FilePath& file_path);
void CountSize();
void Seek(int64 offset);
void AdvanceItem();
void AdvanceBytesRead(int result);
int ComputeBytesToRead() const;
bool ReadLoop(int* bytes_read);
bool ReadItem();
bool ReadBytes(const BlobData::Item& item);
bool DispatchReadFile(const BlobData::Item& item);
bool ReadFile(const BlobData::Item& item);
void HeadersCompleted(int status_code, const std::string& status_txt);
int ReadCompleted();
void NotifySuccess();
void NotifyFailure(int);
void DidStart();
void DidResolve(base::PlatformFileError rv,
const base::PlatformFileInfo& file_info);
void DidOpen(base::PlatformFileError rv,
base::PassPlatformFile file,
bool created);
void DidRead(int result);
base::ScopedCallbackFactory<BlobURLRequestJob> callback_factory_;
scoped_refptr<BlobData> blob_data_;
scoped_refptr<base::MessageLoopProxy> file_thread_proxy_;
net::CompletionCallbackImpl<BlobURLRequestJob> io_callback_;
std::vector<int64> item_length_list_;
scoped_ptr<net::FileStream> stream_;
size_t item_index_;
int64 total_size_;
int64 current_item_offset_;
int64 remaining_bytes_;
scoped_refptr<net::IOBuffer> read_buf_;
int read_buf_offset_;
int read_buf_size_;
int read_buf_remaining_bytes_;
int bytes_to_read_;
bool error_;
bool headers_set_;
bool byte_range_set_;
net::HttpByteRange byte_range_;
scoped_ptr<net::HttpResponseInfo> response_info_;
ScopedRunnableMethodFactory<BlobURLRequestJob> method_factory_;
DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
};
} // namespace webkit_blob
#endif // WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
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