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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.
#ifndef WEBKIT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
#define WEBKIT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "net/base/upload_element_reader.h"
#include "url/gurl.h"
#include "webkit/browser/webkit_storage_browser_export.h"
namespace webkit_blob {
class FileStreamReader;
}
namespace fileapi {
class FileSystemContext;
// An UploadElementReader implementation for filesystem file.
class WEBKIT_STORAGE_BROWSER_EXPORT UploadFileSystemFileElementReader
: public net::UploadElementReader {
public:
UploadFileSystemFileElementReader(
FileSystemContext* file_system_context,
const GURL& url,
uint64 range_offset,
uint64 range_length,
const base::Time& expected_modification_time);
virtual ~UploadFileSystemFileElementReader();
// UploadElementReader overrides:
virtual int Init(const net::CompletionCallback& callback) OVERRIDE;
virtual uint64 GetContentLength() const OVERRIDE;
virtual uint64 BytesRemaining() const OVERRIDE;
virtual int Read(net::IOBuffer* buf,
int buf_length,
const net::CompletionCallback& callback) OVERRIDE;
private:
void OnGetLength(const net::CompletionCallback& callback, int64 result);
void OnRead(const net::CompletionCallback& callback, int result);
scoped_refptr<FileSystemContext> file_system_context_;
const GURL url_;
const uint64 range_offset_;
const uint64 range_length_;
const base::Time expected_modification_time_;
scoped_ptr<webkit_blob::FileStreamReader> stream_reader_;
uint64 stream_length_;
uint64 position_;
base::WeakPtrFactory<UploadFileSystemFileElementReader> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(UploadFileSystemFileElementReader);
};
} // namespace fileapi
#endif // WEBKIT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
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