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// Copyright (c) 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 CONTENT_BROWSER_ANDROID_URL_REQUEST_CONTENT_JOB_H_
#define CONTENT_BROWSER_ANDROID_URL_REQUEST_CONTENT_JOB_H_
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "content/common/content_export.h"
#include "net/base/net_errors.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 {
class TaskRunner;
}
namespace file_util {
struct FileInfo;
}
namespace net {
class FileStream;
}
namespace content {
// A request job that handles reading content URIs
class CONTENT_EXPORT URLRequestContentJob : public net::URLRequestJob {
public:
URLRequestContentJob(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
const base::FilePath& content_path,
const scoped_refptr<base::TaskRunner>& content_task_runner);
// net::URLRequestJob:
void Start() override;
void Kill() override;
int ReadRawData(net::IOBuffer* buf, int buf_size) override;
bool IsRedirectResponse(GURL* location, int* http_status_code) override;
bool GetMimeType(std::string* mime_type) const override;
void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override;
protected:
~URLRequestContentJob() override;
private:
// Meta information about the content URI. It's used as a member in the
// URLRequestContentJob and also passed between threads because disk access is
// necessary to obtain it.
struct ContentMetaInfo {
ContentMetaInfo();
// Flag showing whether the content URI exists.
bool content_exists;
// Size of the content URI.
int64 content_size;
// Mime type associated with the content URI.
std::string mime_type;
};
// Fetches content URI info on a background thread.
static void FetchMetaInfo(const base::FilePath& content_path,
ContentMetaInfo* meta_info);
// Callback after fetching content URI info on a background thread.
void DidFetchMetaInfo(const ContentMetaInfo* meta_info);
// Callback after opening content URI on a background thread.
void DidOpen(int result);
// Callback after seeking to the beginning of |byte_range_| in the content URI
// on a background thread.
void DidSeek(int64 result);
// Callback after data is asynchronously read from the content URI into |buf|.
void DidRead(int result);
// The full path of the content URI.
base::FilePath content_path_;
scoped_ptr<net::FileStream> stream_;
ContentMetaInfo meta_info_;
const scoped_refptr<base::TaskRunner> content_task_runner_;
net::HttpByteRange byte_range_;
net::Error range_parse_result_;
int64 remaining_bytes_;
bool io_pending_;
base::WeakPtrFactory<URLRequestContentJob> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(URLRequestContentJob);
};
} // namespace content
#endif // CONTENT_BROWSER_ANDROID_URL_REQUEST_CONTENT_JOB_H_
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