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// Copyright 2017 The Cobalt Authors. 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include <string>
#include <utility>
#include <vector>
#include "base/basictypes.h"
#include "cobalt/websocket/web_socket_frame_container.h"
#include "cobalt/websocket/web_socket_handshake_helper.h"
#include "net/base/io_buffer.h"
#include "net/websockets/websocket_frame_parser.h"
namespace cobalt {
namespace websocket {
class WebSocketImpl;
// This is the event interface that net takes to process all the events that
// happen during websocket connections.
// The lifetime of a connection process sometimes is shorter than the websocket
// so it has to be another class different from WebSocketChannel's creator
// which is our WebSocketImpl.
class CobaltWebSocketEventHandler : public net::WebSocketEventInterface {
explicit CobaltWebSocketEventHandler(WebSocketImpl* creator)
: creator_(creator) {
// Called when a URLRequest is created for handshaking.
void OnCreateURLRequest(net::URLRequest* request) override {}
// Called in response to an AddChannelRequest. This means that a response has
// been received from the remote server.
void OnAddChannelResponse(const std::string& selected_subprotocol,
const std::string& extensions) override;
// Called when a data frame has been received from the remote host and needs
// to be forwarded to the renderer process.
void OnDataFrame(bool fin, WebSocketMessageType type,
scoped_refptr<net::IOBuffer> buffer,
size_t buffer_size) override;
// Called to provide more send quota for this channel to the renderer
// process. Currently the quota units are always bytes of message body
// data. In future it might depend on the type of multiplexing in use.
void OnFlowControl(int64_t quota) override {}
// Called when the remote server has Started the WebSocket Closing
// Handshake. The client should not attempt to send any more messages after
// receiving this message. It will be followed by OnDropChannel() when the
// closing handshake is complete.
void OnClosingHandshake() override;
// Called when the channel has been dropped, either due to a network close, a
// network error, or a protocol error. This may or may not be preceeded by a
// call to OnClosingHandshake().
// Warning: Both the |code| and |reason| are passed through to Javascript, so
// callers must take care not to provide details that could be useful to
// attackers attempting to use WebSocketMessageType to probe networks.
// |was_clean| should be true if the closing handshake completed successfully.
// The channel should not be used again after OnDropChannel() has been
// called.
// This function deletes the Channel.
void OnDropChannel(bool was_clean, uint16_t code,
const std::string& reason) override;
// Called when the browser fails the channel, as specified in the spec.
// The channel should not be used again after OnFailChannel() has been
// called.
// This function deletes the Channel.
void OnFailChannel(const std::string& message) override;
// Called when the browser starts the WebSocket Opening Handshake.
void OnStartOpeningHandshake(
std::unique_ptr<net::WebSocketHandshakeRequestInfo> request) override {}
// Called when the browser finishes the WebSocket Opening Handshake.
void OnFinishOpeningHandshake(
std::unique_ptr<net::WebSocketHandshakeResponseInfo> response) override {}
// Called on SSL Certificate Error during the SSL handshake. Should result in
// a call to either ssl_error_callbacks->ContinueSSLRequest() or
// ssl_error_callbacks->CancelSSLRequest(). Normally the implementation of
// this method will delegate to content::SSLManager::OnSSLCertificateError to
// make the actual decision. The callbacks must not be called after the
// WebSocketChannel has been destroyed.
void OnSSLCertificateError(
const GURL& url, const net::SSLInfo& ssl_info, bool fatal) override;
// Called when authentication is required. Returns a net error. The opening
// handshake is blocked when this function returns ERR_IO_PENDING.
// In that case calling |callback| resumes the handshake. |callback| can be
// called during the opening handshake. An implementation can rewrite
// |*credentials| (in the sync case) or provide new credentials (in the
// async case).
// Providing null credentials (nullopt in the sync case and nullptr in the
// async case) cancels authentication. Otherwise the new credentials are set
// and the opening handshake will be retried with the credentials.
int OnAuthRequired(
scoped_refptr<net::AuthChallengeInfo> auth_info,
scoped_refptr<net::HttpResponseHeaders> response_headers,
const net::HostPortPair& host_port_pair,
base::OnceCallback<void(const net::AuthCredentials*)> callback,
base::Optional<net::AuthCredentials>* credentials) override;
CobaltWebSocketEventHandler() {}
// For now, we forward most event to the impl to handle. We might want to
// move more thing
WebSocketImpl* creator_;
// This vector should store data of data frams from the same message.
typedef std::vector<std::pair<scoped_refptr<net::IOBuffer>, size_t>>
FrameDataVector frame_data_;
WebSocketMessageType message_type_ =
} // namespace websocket
} // namespace cobalt