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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 CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_
#define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_
#include <memory>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/optional.h"
#include "content/common/content_export.h"
#include "content/public/common/previews_state.h"
namespace net {
class HttpRequestHeaders;
}
namespace content {
class AppCacheNavigationHandle;
class BrowserContext;
class NavigationUIData;
class NavigationURLLoaderDelegate;
class NavigationURLLoaderFactory;
class PrefetchedSignedExchangeCache;
class ResourceContext;
class ServiceWorkerNavigationHandle;
class StoragePartition;
struct NavigationRequestInfo;
// PlzNavigate: The navigation logic's UI thread entry point into the resource
// loading stack. It exposes an interface to control the request prior to
// receiving the response. If the NavigationURLLoader is destroyed before
// OnResponseStarted is called, the request is aborted.
class CONTENT_EXPORT NavigationURLLoader {
public:
// Creates a NavigationURLLoader. The caller is responsible for ensuring that
// |delegate| outlives the loader. |request_body| must not be accessed on the
// UI thread after this point.
//
// TODO(davidben): When navigation is disentangled from the loader, the
// request parameters should not come in as a navigation-specific
// structure. Information like has_user_gesture and
// should_replace_current_entry shouldn't be needed at this layer.
static std::unique_ptr<NavigationURLLoader> Create(
BrowserContext* browser_context,
ResourceContext* resource_context,
StoragePartition* storage_partition,
std::unique_ptr<NavigationRequestInfo> request_info,
std::unique_ptr<NavigationUIData> navigation_ui_data,
ServiceWorkerNavigationHandle* service_worker_handle,
AppCacheNavigationHandle* appcache_handle,
scoped_refptr<PrefetchedSignedExchangeCache>
prefetched_signed_exchange_cache,
NavigationURLLoaderDelegate* delegate);
// For testing purposes; sets the factory for use in testing.
static void SetFactoryForTesting(NavigationURLLoaderFactory* factory);
virtual ~NavigationURLLoader() {}
// Called in response to OnRequestRedirected to continue processing the
// request. |new_previews_state| will be updated for newly created URLLoaders,
// but the existing default URLLoader will not see |new_previews_state| unless
// the URLLoader happens to be reset.
virtual void FollowRedirect(const std::vector<std::string>& removed_headers,
const net::HttpRequestHeaders& modified_headers,
PreviewsState new_previews_state) = 0;
// Called in response to OnResponseStarted to process the response.
virtual void ProceedWithResponse() = 0;
protected:
NavigationURLLoader() {}
private:
DISALLOW_COPY_AND_ASSIGN(NavigationURLLoader);
};
} // namespace content
#endif // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_