BaseHttpSocket.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "BaseHttpSocket.h"
#include <boost/beast/http/serializer.hpp>
 
namespace Trinity::Net::Http
{
using RequestSerializer = boost::beast::http::request_serializer<ResponseBody>;
using ResponseSerializer = boost::beast::http::response_serializer<ResponseBody>;
 
bool AbstractSocket::ParseRequest(MessageBuffer& packet, RequestParser& parser)
{
    if (!parser.is_done())
    {
        // need more data in the payload
        boost::system::error_code ec = {};
        std::size_t readDataSize = parser.put(boost::asio::const_buffer(packet.GetReadPointer(), packet.GetActiveSize()), ec);
        packet.ReadCompleted(readDataSize);
    }
 
    return parser.is_done();
}
 
std::string AbstractSocket::SerializeRequest(Request const& request)
{
    RequestSerializer serializer(request);
 
    std::string buffer;
    while (!serializer.is_done())
    {
        size_t totalBytes = 0;
        boost::system::error_code ec = {};
        serializer.next(ec, [&]<typename ConstBufferSequence>(boost::system::error_code const&, ConstBufferSequence const& buffers)
        {
            size_t totalBytesInBuffers = boost::asio::buffer_size(buffers);
 
            buffer.reserve(buffer.size() + totalBytes);
 
            auto begin = boost::asio::buffers_begin(buffers);
            auto end = boost::asio::buffers_end(buffers);
 
            std::copy(begin, end, std::back_inserter(buffer));
            totalBytes += totalBytesInBuffers;
        });
 
        serializer.consume(totalBytes);
    }
 
    return buffer;
}
 
MessageBuffer AbstractSocket::SerializeResponse(Request const& request, Response& response)
{
    response.prepare_payload();
 
    ResponseSerializer serializer(response);
    bool (*serializerIsDone)(ResponseSerializer&);
    if (request.method() != boost::beast::http::verb::head)
    {
        serializerIsDone = [](ResponseSerializer& s) { return s.is_done(); };
    }
    else
    {
        serializerIsDone = [](ResponseSerializer& s) { return s.is_header_done(); };
        serializer.split(true);
    }
 
    MessageBuffer buffer;
    while (!serializerIsDone(serializer))
    {
        serializer.limit(buffer.GetRemainingSpace());
 
        size_t totalBytes = 0;
        boost::system::error_code ec = {};
        serializer.next(ec, [&]<typename ConstBufferSequence>(boost::system::error_code& currentError, ConstBufferSequence const& buffers)
        {
            size_t totalBytesInBuffers = boost::asio::buffer_size(buffers);
            if (totalBytesInBuffers > buffer.GetRemainingSpace())
            {
                currentError = boost::beast::http::error::need_more;
                return;
            }
 
            auto begin = boost::asio::buffers_begin(buffers);
            auto end = boost::asio::buffers_end(buffers);
 
            std::copy(begin, end, buffer.GetWritePointer());
            buffer.WriteCompleted(totalBytesInBuffers);
            totalBytes += totalBytesInBuffers;
        });
 
        serializer.consume(totalBytes);
 
        if (ec == boost::beast::http::error::need_more)
            buffer.Resize(buffer.GetBufferSize() + 4096);
    }
 
    return buffer;
}
}