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// 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 NET_URL_REQUEST_URL_REQUEST_FILE_JOB_H_
#define NET_URL_REQUEST_URL_REQUEST_FILE_JOB_H_
#include <string>
#include <vector>
#include "base/file_path.h"
#include "base/memory/weak_ptr.h"
#include "net/base/net_export.h"
#include "net/http/http_byte_range.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_job.h"
namespace base{
struct PlatformFileInfo;
}
namespace file_util {
struct FileInfo;
}
namespace net {
class FileStream;
// A request job that handles reading file URLs
class NET_EXPORT URLRequestFileJob : public URLRequestJob {
public:
URLRequestFileJob(URLRequest* request,
NetworkDelegate* network_delegate,
const FilePath& file_path);
static URLRequest::ProtocolFactory Factory;
// URLRequestJob:
virtual void Start() OVERRIDE;
virtual void Kill() OVERRIDE;
virtual bool ReadRawData(IOBuffer* buf,
int buf_size,
int* bytes_read) OVERRIDE;
virtual bool IsRedirectResponse(GURL* location,
int* http_status_code) OVERRIDE;
virtual Filter* SetupFilter() const OVERRIDE;
virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
virtual void SetExtraRequestHeaders(
const HttpRequestHeaders& headers) OVERRIDE;
protected:
virtual ~URLRequestFileJob();
// The OS-specific full path name of the file
FilePath file_path_;
private:
// Meta information about the file. It's used as a member in the
// URLRequestFileJob and also passed between threads because disk access is
// necessary to obtain it.
struct FileMetaInfo {
FileMetaInfo();
// Size of the file.
int64 file_size;
// Mime type associated with the file.
std::string mime_type;
// Result returned from GetMimeTypeFromFile(), i.e. flag showing whether
// obtaining of the mime type was successful.
bool mime_type_result;
// Flag showing whether the file exists.
bool file_exists;
// Flag showing whether the file name actually refers to a directory.
bool is_directory;
};
// Fetches file info on a background thread.
static void FetchMetaInfo(const FilePath& file_path,
FileMetaInfo* meta_info);
// Callback after fetching file info on a background thread.
void DidFetchMetaInfo(const FileMetaInfo* meta_info);
// Callback after opening file on a background thread.
void DidOpen(int result);
// Callback after seeking to the beginning of |byte_range_| in the file
// on a background thread.
void DidSeek(int64 result);
// Callback after data is asynchronously read from the file.
void DidRead(int result);
scoped_ptr<FileStream> stream_;
FileMetaInfo meta_info_;
HttpByteRange byte_range_;
int64 remaining_bytes_;
base::WeakPtrFactory<URLRequestFileJob> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(URLRequestFileJob);
};
} // namespace net
#endif // NET_URL_REQUEST_URL_REQUEST_FILE_JOB_H_