boost::async_read_some连续接收数据

我在最近工作的时候用到了boost的http_server程序，这个http_server是一个框架用于接收并解析http协议。这个框架在接收get请求时没有任何问题，当接收post数据时，当数据大于>2k时，无法正确接收，后来发现sync_read_some函数一次只能接收大约1k数据，如果要接收大数据，需要反复接收，自己修改了几天，将经验分享一下。//接收数据的bufferboost::array<char, 8192> buffer_;//数据需要多次接收，将多次接收的数据都放入data中std::string data;void connection::start(){//超时限制  timer.expires_from_now(boost::posix_time::microseconds(1000000));  timer.async_wait(boost::bind(&connection::close_connect1,this));   buffer_.data()[0] = '\0';  //开始接收数据  socket_.async_read_some(boost::asio::buffer(buffer_),  boost::bind(&connection::handle_read1, shared_from_this(),  boost::asio::placeholders::error,         boost::asio::placeholders::bytes_transferred,data));  return;}void connection::handle_read1(const boost::system::error_code& e,std::size_t bytes_transferred,string& data){//如果超时，返回空if(!m_flag){m_flag = true;    request_handler_.handle_request1(request_, reply_);   boost::asio::async_write(socket_, reply_.to_buffers(),   boost::bind(&connection::handle_write, shared_from_this(),   boost::asio::placeholders::error));      boost::system::error_code ignored_ec;    socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);   return;}//如果接收有错误或者接收的数据长度=0，和超时处理一致if(e || bytes_transferred==0){request_handler_.handle_request1(request_, reply_);      boost::asio::async_write(socket_, reply_.to_buffers(),          boost::bind(&connection::handle_write, shared_from_this(),            boost::asio::placeholders::error));    boost::system::error_code ignored_ec;    socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);    return;}else{buffer_.data()[bytes_transferred] = '\0';data = data + buffer_.data();//表示接收到了结束标志if (data.find("|*|*|") != string::npos){int pos = data.find("|*|*|");printf("pos=%d\n",pos);    data = data.substr(0,pos);            if(data.length()>0)        {//时钟取消        timer.cancel();        //用于处理接收的数据并将处理完的数据返回去，处理完的数据存储在reply中         request_handler_.handle_request_pos(request_, reply_,data);         boost::asio::async_write(socket_, reply_.to_buffers(),              boost::bind(&connection::handle_write, shared_from_this(),                boost::asio::placeholders::error));        }        else{        request_handler_.handle_request1(request_, reply_);          boost::asio::async_write(socket_, reply_.to_buffers(),              boost::bind(&connection::handle_write, shared_from_this(),                boost::asio::placeholders::error));        }        boost::system::error_code ignored_ec;        socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);        return;      }