HTTP WebSocket Classes basic_headers basic_parser basic_streambuf_body empty_body error_code headers message resume_context streambuf_body string_body Type Traits is_Body Functions async_read async_write read write Concepts Body Field FieldSequence Reader Writer Classes close_reason static_string stream Options auto_fragment_size decorate keep_alive read_buffer_size read_message_max write_buffer_size Functions async_teardown teardown Constants close_code opcode Core Classes async_completion basic_streambuf buffers_adapter consuming_buffers handler_alloc prepared_buffers static_streambuf static_streambuf_n streambuf streambuf_readstream Functions bind_handler buffer_cat prepare_buffer prepare_buffers write Type Traits is_AsyncReadStream is_AsyncWriteStream is_BufferSequence is_ConstBufferSequence is_Handler is_MutableBufferSequence is_Stream is_Streambuf is_SyncReadStream is_SyncWriteStream Concepts BufferSequence Stream Streambuf