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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_PUBLIC_RENDERER_REQUEST_PEER_H_
#define CONTENT_PUBLIC_RENDERER_REQUEST_PEER_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "base/task_runner.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/base/big_buffer.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "services/network/public/mojom/url_response_head.mojom-forward.h"
namespace net {
struct RedirectInfo;
}
namespace network {
struct URLLoaderCompletionStatus;
}
namespace content {
// This is implemented by our custom resource loader within content. The Peer
// and it's bridge should have identical lifetimes as they represent each end of
// a communication channel.
//
// These callbacks mirror net::URLRequest::Delegate and the order and
// conditions in which they will be called are identical. See url_request.h
// for more information.
class CONTENT_EXPORT RequestPeer {
public:
// Called as upload progress is made.
// note: only for requests with upload progress enabled.
virtual void OnUploadProgress(uint64_t position, uint64_t size) = 0;
// Called when a redirect occurs. The implementation may return false to
// suppress the redirect. The URLResponseHead provides information about
// the redirect response and the RedirectInfo includes information about the
// request to be made if the method returns true. |removed_headers| outputs
// header field names that need to be removed.
virtual bool OnReceivedRedirect(
const net::RedirectInfo& redirect_info,
network::mojom::URLResponseHeadPtr head,
std::vector<std::string>* removed_headers) = 0;
// Called when response headers are available (after all redirects have
// been followed).
virtual void OnReceivedResponse(network::mojom::URLResponseHeadPtr head) = 0;
// Called when the response body becomes available.
virtual void OnStartLoadingResponseBody(
mojo::ScopedDataPipeConsumerHandle body) = 0;
// Called when the transfer size is updated. This method may be called
// multiple times or not at all. The transfer size is the length of the
// response (including both headers and the body) over the network.
// |transfer_size_diff| is the difference from the value previously reported
// one (including the one in OnReceivedResponse). It must be positive.
virtual void OnTransferSizeUpdated(int transfer_size_diff) = 0;
// Called when metadata generated by the renderer is retrieved from the
// cache. This method may be called zero or one times.
virtual void OnReceivedCachedMetadata(mojo_base::BigBuffer data) {}
// Called when the response is complete. This method signals completion of
// the resource load.
virtual void OnCompletedRequest(
const network::URLLoaderCompletionStatus& status) = 0;
// Returns the task runner on which this request peer is running.
virtual scoped_refptr<base::TaskRunner> GetTaskRunner() = 0;
virtual ~RequestPeer() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_RENDERER_REQUEST_PEER_H_
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