src/cobalt/loader/fetcher_factory.h

/*
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COBALT_LOADER_FETCHER_FACTORY_H_
#define COBALT_LOADER_FETCHER_FACTORY_H_

#include "base/file_path.h"
#include "base/optional.h"
#include "base/threading/thread.h"
#include "cobalt/csp/content_security_policy.h"
#include "cobalt/loader/blob_fetcher.h"
#include "cobalt/loader/fetcher.h"
#include "googleurl/src/gurl.h"

namespace cobalt {
namespace network {
class NetworkModule;
}

namespace loader {

class FetcherFactory {
 public:
  explicit FetcherFactory(network::NetworkModule* network_module);
  FetcherFactory(network::NetworkModule* network_module,
                 const FilePath& extra_search_dir);
  FetcherFactory(network::NetworkModule* network_module,
                 const FilePath& extra_search_dir,
                 const BlobFetcher::ResolverCallback& blob_resolver);

  // Creates a fetcher. Returns NULL if the creation fails.
  scoped_ptr<Fetcher> CreateFetcher(const GURL& url, Fetcher::Handler* handler);

  // Similar to above, but takes a message loop where fetcher will be created.
  // Note: |handler| will be called on the fetching_message_loop.
  // If |fetching_message_loop| is NULL, then item will be fetched on the
  // current message loop.
  scoped_ptr<Fetcher> CreateFetcherWithMessageLoop(
      const GURL& url, MessageLoop* fetching_message_loop,
      Fetcher::Handler* handler);

  scoped_ptr<Fetcher> CreateSecureFetcher(
      const GURL& url, const csp::SecurityCallback& url_security_callback,
      Fetcher::Handler* handler);

  // Create a fetcher on a specific message loop.  So the |handler| related
  // callbacks will be called there.
  scoped_ptr<Fetcher> CreateSecureFetcherWithMessageLoop(
      const GURL& url, const csp::SecurityCallback& url_security_callback,
      MessageLoop* fetching_message_loop, Fetcher::Handler* handler);

  network::NetworkModule* network_module() const { return network_module_; }

 private:
  base::Thread file_thread_;
  network::NetworkModule* network_module_;
  FilePath extra_search_dir_;
  BlobFetcher::ResolverCallback blob_resolver_;
};

}  // namespace loader
}  // namespace cobalt

#endif  // COBALT_LOADER_FETCHER_FACTORY_H_