PlainClientSession.h

/*-----------------------------------------------------------------------
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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 "AbstractClientSessionCRTP.h"
 
namespace ETP_NS
{
    class PlainClientSession : public AbstractClientSessionCRTP<PlainClientSession>
    {
    public:
        /*
        * @param frameSize              Sets the size of the write buffer used by the implementation to send frames : https://www.boost.org/doc/libs/1_75_0/libs/beast/doc/html/beast/ref/boost__beast__websocket__stream/write_buffer_bytes/overload1.html.
        */
        FETPAPI_DLL_IMPORT_OR_EXPORT PlainClientSession(
            InitializationParameters const* initializationParams, const std::string & target, const std::string & authorization, const std::string& proxyAuthorization = "",
            const std::map<std::string, std::string>& additionalHandshakeHeaderFields = {}, std::size_t frameSize = 4096);
 
        virtual ~PlainClientSession() = default;
 
        // Called by the base class
#if BOOST_VERSION < 107000
        FETPAPI_DLL_IMPORT_OR_EXPORT std::unique_ptr<websocket::stream<tcp::socket>>& ws() { return ws_; }
#else
        FETPAPI_DLL_IMPORT_OR_EXPORT std::unique_ptr<websocket::stream<boost::beast::tcp_stream>>& ws() { return ws_; }
#endif
 
        bool isTls() const final{ return false; }
 
        void asyncConnect(const tcp::resolver::results_type& results)
        {
            // Reality check: IPv6 is unlikely to be available yet
            std::vector<tcp::endpoint> endpoints = std::vector<tcp::endpoint>(results.begin(), results.end());
            std::stable_partition(endpoints.begin(), endpoints.end(), [](auto entry) {return entry.protocol() == tcp::v4(); });
 
#if BOOST_VERSION < 107000
            ws_.reset(new websocket::stream<tcp::socket>(ioc));
            ws_->write_buffer_size(frameSize_);
            ws_->binary(true);
 
            // Make the connection on the IP address we get from a lookup
            boost::asio::async_connect(
                ws_->next_layer(),
                endpoints.begin(),
                endpoints.end(),
                std::bind(
                    &AbstractClientSessionCRTP::on_ssl_handshake,
                    std::static_pointer_cast<AbstractClientSessionCRTP>(shared_from_this()),
                    std::placeholders::_1));
#else
            ws_.reset(new websocket::stream<boost::beast::tcp_stream>(ioc));
            ws_->write_buffer_bytes(frameSize_);
            ws_->binary(true);
 
            // Make the connection on the IP address we get from a lookup
            boost::beast::get_lowest_layer(*ws_).async_connect(
                endpoints,
                boost::beast::bind_front_handler(
                    &PlainClientSession::on_connect,
                    std::static_pointer_cast<PlainClientSession>(shared_from_this())));
#endif
        }
 
#if BOOST_VERSION > 106900
        void on_connect(boost::beast::error_code ec, tcp::resolver::results_type::endpoint_type)
        {
            on_ssl_handshake(ec);
        }
#endif
 
    private:
#if BOOST_VERSION < 107000
        std::unique_ptr<websocket::stream<tcp::socket>> ws_;
#else
        std::unique_ptr<websocket::stream<boost::beast::tcp_stream>> ws_;
#endif
        std::size_t frameSize_;
    };
}