获取boost::beats::buffers打印的数据

#include <sstream>

boost::beast::multi_buffer buffer;
do {
    ws.read_some(buffer, 512);
} while(!ws.is_message_done());

std::stringstream ss;
ss << boost::beast::buffers(buffer.data());
std::string datas = ss.str();
buffer.consume(buffer.size());