blob: 1df2619f3b3e1346121821fce4b4a516f616a814 [file] [log] [blame]
// Copyright (c) 2012 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/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/platform_file.h"
#include "net/http/http_byte_range.h"
#include "net/url_request/url_request_job.h"
#include "webkit/blob/blob_data.h"
#include "webkit/blob/blob_export.h"
namespace base {
class MessageLoopProxy;
struct PlatformFileInfo;
}
namespace net {
class DrainableIOBuffer;
class FileStream;
class IOBuffer;
}
namespace webkit_blob {
class LocalFileReader;
// A request job that handles reading blob URLs.
class BLOB_EXPORT 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() OVERRIDE;
virtual void Kill() OVERRIDE;
virtual bool ReadRawData(net::IOBuffer* buf,
int buf_size,
int* bytes_read) OVERRIDE;
virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
virtual void GetResponseInfo(net::HttpResponseInfo* info) OVERRIDE;
virtual int GetResponseCode() const OVERRIDE;
virtual void SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) OVERRIDE;
private:
typedef std::map<size_t, LocalFileReader*> IndexToReaderMap;
// For preparing for read: get the size, apply the range and perform seek.
void DidStart();
void CountSize();
void DidCountSize(int error);
void DidGetFileItemLength(size_t index, int64 result);
void Seek(int64 offset);
// For reading the blob.
bool ReadLoop(int* bytes_read);
bool ReadItem();
void AdvanceItem();
void AdvanceBytesRead(int result);
bool ReadBytesItem(const BlobData::Item& item, int bytes_to_read);
bool ReadFileItem(LocalFileReader* reader, int bytes_to_read);
void DidReadFile(int result);
void DeleteCurrentFileReader();
int ComputeBytesToRead() const;
int BytesReadCompleted();
void NotifySuccess();
void NotifyFailure(int);
void HeadersCompleted(int status_code, const std::string& status_txt);
// Returns a LocalFileReader for a blob item at |index|.
// If the item at |index| is not of TYPE_FILE this returns NULL.
LocalFileReader* GetFileReader(size_t index);
base::WeakPtrFactory<BlobURLRequestJob> weak_factory_;
scoped_refptr<BlobData> blob_data_;
scoped_refptr<base::MessageLoopProxy> file_thread_proxy_;
std::vector<int64> item_length_list_;
int64 total_size_;
int64 remaining_bytes_;
int pending_get_file_info_count_;
IndexToReaderMap index_to_reader_;
size_t current_item_index_;
int64 current_item_offset_;
scoped_refptr<net::DrainableIOBuffer> read_buf_;
bool error_;
bool headers_set_;
bool byte_range_set_;
net::HttpByteRange byte_range_;
scoped_ptr<net::HttpResponseInfo> response_info_;
DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
};
} // namespace webkit_blob
#endif // WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_