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Abstract SSL or plain mode of a ClientSession
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| /*----------------------------------------------------------------------- | ||
| Licensed to the Apache Software Foundation (ASF) under one | ||
| or more contributor license agreements. See the NOTICE file | ||
| distributed with this work for additional information | ||
| regarding copyright ownership. The ASF licenses this file | ||
| to you 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. | ||
| -----------------------------------------------------------------------*/ | ||
| #pragma once | ||
|
|
||
| #include "ClientSession.h" | ||
|
|
||
| #include <thread> | ||
|
|
||
| #include <boost/asio/connect.hpp> | ||
| #include <boost/uuid/random_generator.hpp> | ||
| #include <boost/uuid/uuid_io.hpp> | ||
|
|
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| #include "InitializationParameters.h" | ||
|
|
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| namespace ETP_NS | ||
| { | ||
| // Echoes back all received WebSocket messages. | ||
| // This uses the Curiously Recurring Template Pattern so that the same code works with both SSL streams and regular sockets. | ||
| template<class Derived> | ||
| class AbstractClientSessionCRTP : public ETP_NS::ClientSession | ||
| { | ||
| public: | ||
|
|
||
| virtual ~AbstractClientSessionCRTP() = default; | ||
|
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| void on_connect(boost::system::error_code ec) { | ||
| if (ec) { | ||
| std::cerr << "on_connect : " << ec.message() << std::endl; | ||
| } | ||
|
|
||
| #if BOOST_VERSION < 107000 | ||
| // Perform the websocket handshake | ||
| derived().ws().async_handshake_ex(responseType, | ||
| host + ":" + port, target, | ||
| [&](websocket::request_type& m) | ||
| { | ||
| m.insert(boost::beast::http::field::sec_websocket_protocol, "etp12.energistics.org"); | ||
| m.insert(boost::beast::http::field::authorization, authorization); | ||
| m.insert("etp-encoding", "binary"); | ||
| for (const auto& mapEntry : additionalHandshakeHeaderFields_) { | ||
| m.insert(mapEntry.first, mapEntry.second); | ||
| } | ||
| }, | ||
| std::bind( | ||
| &AbstractClientSessionCRTP::on_handshake, | ||
| std::static_pointer_cast<AbstractClientSessionCRTP>(shared_from_this()), | ||
| std::placeholders::_1)); | ||
| #else | ||
| derived().ws().set_option(websocket::stream_base::decorator( | ||
| [&](websocket::request_type& m) | ||
| { | ||
| m.insert(boost::beast::http::field::sec_websocket_protocol, "etp12.energistics.org"); | ||
| m.insert(boost::beast::http::field::authorization, authorization); | ||
| m.insert("etp-encoding", "binary"); | ||
| for (const auto& mapEntry : additionalHandshakeHeaderFields_) { | ||
| m.insert(mapEntry.first, mapEntry.second); | ||
| } | ||
| }) | ||
| ); | ||
| // Perform the websocket handshake | ||
| derived().ws().async_handshake(responseType, | ||
| host + ":" + port, target, | ||
| std::bind( | ||
| &AbstractClientSessionCRTP::on_handshake, | ||
| std::static_pointer_cast<AbstractClientSessionCRTP>(shared_from_this()), | ||
| std::placeholders::_1)); | ||
| #endif | ||
| } | ||
|
|
||
| /** | ||
| * Close the Websocket Session | ||
| * The ETP session had to be closed before. | ||
| */ | ||
| FETPAPI_DLL_IMPORT_OR_EXPORT void do_close() { | ||
| derived().ws().async_close(websocket::close_code::normal, | ||
| std::bind( | ||
| &AbstractSession::on_close, | ||
| shared_from_this(), | ||
| std::placeholders::_1)); | ||
| } | ||
|
|
||
| FETPAPI_DLL_IMPORT_OR_EXPORT void do_read() | ||
| { | ||
| if (webSocketSessionClosed) { | ||
| fesapi_log("CLOSED : NOTHING MORE TO DO"); | ||
| return; | ||
| } | ||
|
|
||
| // Read a message into our buffer | ||
| derived().ws().async_read( | ||
| receivedBuffer, | ||
| std::bind( | ||
| &AbstractSession::on_read, | ||
| shared_from_this(), | ||
| std::placeholders::_1, | ||
| std::placeholders::_2)); | ||
| } | ||
|
|
||
| void on_handshake(boost::system::error_code ec) | ||
| { | ||
| if (ec) { | ||
| std::cerr << "on_handshake : " << ec.message() << std::endl; | ||
| std::cerr << "Sometimes some ETP server require a trailing slash at the end of their URL. Did you also check your optional \"data-partition-id\" additional Header Field?" << std::endl; | ||
| return; | ||
| } | ||
|
|
||
| if (!responseType.count(boost::beast::http::field::sec_websocket_protocol) || | ||
| responseType[boost::beast::http::field::sec_websocket_protocol] != "etp12.energistics.org") | ||
| std::cerr << "The client MUST specify the Sec-Websocket-Protocol header value of etp12.energistics.org, and the server MUST reply with the same" << std::endl; | ||
|
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| successfulConnection = true; | ||
| webSocketSessionClosed = false; | ||
|
|
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| send(requestSession, 0, 0x02); | ||
| do_read(); | ||
| } | ||
|
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| void setMaxWebSocketMessagePayloadSize(int64_t value) final { | ||
| maxWebSocketMessagePayloadSize = value; | ||
| derived().ws().read_message_max(value); | ||
| } | ||
|
|
||
| protected: | ||
| using ClientSession::ClientSession; | ||
|
|
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| // Access the derived class, this is part of the Curiously Recurring Template Pattern idiom. | ||
| Derived& derived() { return static_cast<Derived&>(*this); } | ||
|
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| void do_write() { | ||
| const std::lock_guard<std::mutex> specificProtocolHandlersLock(specificProtocolHandlersMutex); | ||
| if (sendingQueue.empty()) { | ||
| fesapi_log("The sending queue is empty."); | ||
| return; | ||
| } | ||
|
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| bool previousSentMessageCompleted = specificProtocolHandlers.find(std::get<0>(sendingQueue.front())) == specificProtocolHandlers.end(); | ||
|
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| if (!previousSentMessageCompleted) { | ||
| fesapi_log("Cannot send Message id :", std::to_string(std::get<0>(sendingQueue.front())), "because the previous message has not finished to be sent."); | ||
| } | ||
| else { | ||
| fesapi_log("Sending Message id :", std::to_string(std::get<0>(sendingQueue.front()))); | ||
|
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| derived().ws().async_write( | ||
| boost::asio::buffer(std::get<1>(sendingQueue.front())), | ||
| std::bind( | ||
| &AbstractSession::on_write, | ||
| shared_from_this(), | ||
| std::placeholders::_1, | ||
| std::placeholders::_2)); | ||
|
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||
| // Register the handler to respond to the sent message | ||
| specificProtocolHandlers[std::get<0>(sendingQueue.front())] = std::get<2>(sendingQueue.front()); | ||
| } | ||
| } | ||
| }; | ||
| } |
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