Defined in header
template< class AsyncWriteStream, bool isRequest, class Body, class Fields, class WriteHandler> DEDUCED async_write_header( AsyncWriteStream& stream, serializer< isRequest, Body, Fields >& sr, WriteHandler&& handler);
This function is used to write a header to a stream asynchronously using a caller-provided HTTP/1 serializer. The function call always returns immediately. The asynchronous operation will continue until one of the following conditions is true:
This operation is implemented in terms of zero or more calls to the stream's
and is known as a composed operation. The program must
ensure that the stream performs no other writes until this operation completes.
The stream to which the data is to be written. The type must support the AsyncWriteStream concept.
The serializer to use. The object must remain valid at least until the handler is called; ownership is not transferred.
Invoked when the operation completes. The handler may be moved or copied as needed. The equivalent function signature of the handler must be:
void handler( error_code const& error, // result of operation std::size_t bytes_transferred // the number of bytes written to the stream );
Regardless of whether the asynchronous operation completes immediately
or not, the handler will not be invoked from within this function.
Invocation of the handler will be performed in a manner equivalent
The implementation will call
http::serializer::split with the value
true on the serializer passed in.