SYNOPSIS
#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
void nng_http_conn_write(nng_http_conn *conn, nng_aio *aio);DESCRIPTION
The nng_http_conn_write() function starts an asynchronous write to the
HTTP connection conn from the scatter/gather vector located in the
asynchronous I/O structure aio.
| The nng_aio_set_iov(3) function must have been called first, to set the scatter/gather vector for aio. |
This function returns immediately, with no return value. Completion of the operation is signaled via the aio, and the final result may be obtained via nng_aio_result(3). That result will either be zero or an error code.
The I/O operation completes as soon as at least one byte has been written, or an error has occurred. Therefore, the number of bytes written may be less than requested. The actual number of bytes written can be determined with nng_aio_count(3).
| This function is intended to facilitate uses cases that involve changing the protocol from HTTP — such as WebSocket. Most applications will never need to use this function. |
RETURN VALUES
None.
ERRORS
NNG_ECANCELED-
The operation was canceled.
NNG_ECLOSED-
The connection was closed.
NNG_ECONNRESET-
The peer closed the connection.
NNG_EINVAL-
The aio does not contain a valid scatter/gather vector.
NNG_ENOMEM-
Insufficient free memory to perform the operation.
NNG_ENOTSUP-
HTTP operations are not supported.
NNG_ETIMEDOUT-
Timeout waiting for data from the connection.