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// Copyright 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.
#ifndef CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_
#define CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/chromeos/drive/file_errors.h"
#include "net/base/net_errors.h"
#include "net/http/http_byte_range.h"
#include "net/url_request/url_request_job.h"
#include "storage/browser/fileapi/file_stream_reader.h"
#include "storage/browser/fileapi/file_system_url.h"
namespace net {
class IOBuffer;
class NetworkDelegate;
class URLRequest;
} // namespace net
namespace chromeos {
// ExternalFileURLRequestJob is the gateway between network-level drive:...
// requests for drive resources and FileSystem. It exposes content URLs
// formatted as drive:<drive-file-path>.
// The methods should be run on IO thread.
// TODO(hirono): After removing MHTML support, stop to use the special
// externalfile: scheme and use filesystem: URL directly. crbug.com/415455
class ExternalFileURLRequestJob : public net::URLRequestJob {
public:
// Scope of isolated file system.
class IsolatedFileSystemScope {
public:
explicit IsolatedFileSystemScope(const std::string& file_system_id);
~IsolatedFileSystemScope();
private:
std::string file_system_id_;
DISALLOW_COPY_AND_ASSIGN(IsolatedFileSystemScope);
};
// Callback to take results from an internal helper defined in
// drive_url_request_job.cc.
typedef base::Callback<void(
net::Error,
const scoped_refptr<storage::FileSystemContext>& file_system_context,
scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope,
const storage::FileSystemURL& file_system_url,
const std::string& mime_type)> HelperCallback;
ExternalFileURLRequestJob(void* profile_id,
net::URLRequest* request,
net::NetworkDelegate* network_delegate);
// net::URLRequestJob overrides:
void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override;
void Start() override;
void Kill() override;
bool GetMimeType(std::string* mime_type) const override;
bool IsRedirectResponse(GURL* location, int* http_status_code) override;
bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override;
protected:
~ExternalFileURLRequestJob() override;
private:
// Called from an internal helper class defined in drive_url_request_job.cc,
// which is running on the UI thread.
void OnHelperResultObtained(
net::Error error,
const scoped_refptr<storage::FileSystemContext>& file_system_context,
scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope,
const storage::FileSystemURL& file_system_url,
const std::string& mime_type);
// Called from FileSystemBackend::GetRedirectURLForContents.
void OnRedirectURLObtained(const GURL& redirect_url);
// Called from DriveURLRequestJob::OnFileInfoObtained.
void OnFileInfoObtained(base::File::Error result,
const base::File::Info& file_info);
// Called when DriveFileStreamReader::Read is completed.
void OnReadCompleted(int read_result);
void* const profile_id_;
// The range of the file to be returned.
net::HttpByteRange byte_range_;
int64 remaining_bytes_;
scoped_refptr<storage::FileSystemContext> file_system_context_;
scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope_;
storage::FileSystemURL file_system_url_;
std::string mime_type_;
scoped_ptr<storage::FileStreamReader> stream_reader_;
GURL redirect_url_;
// This should remain the last member so it'll be destroyed first and
// invalidate its weak pointers before other members are destroyed.
base::WeakPtrFactory<ExternalFileURLRequestJob> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ExternalFileURLRequestJob);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_
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