#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
void nng_http_conn_read(nng_http_conn *conn, nng_aio *aio);nng_http_conn_read(3http)
NAME
nng_http_conn_read - read from HTTP connection
SYNOPSIS
DESCRIPTION
The nng_http_conn_read() function starts an asynchronous read from the
HTTP connection conn, into the scatter/gather vector located in the
asynchronous I/O structure aio.
The nng_aio_set_iov() 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().
That result will either be zero or an error code.
The I/O operation completes as soon as at least one byte has been
read, or an error has occurred.
Therefore, the number of bytes read may be less than requested.
The actual number of bytes read can be determined with
nng_aio_count().
| 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. |