#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
void nng_http_conn_read_all(nng_http_conn *conn, nng_aio *aio);| This documentation is for version v1.7.3 of NNG, but the latest released version is v1.8.0. see the documentation for v1.8.0 for the most up-to-date information. |
nng_http_conn_read_all(3http)
NAME
nng_http_conn_read_all - read all from HTTP connection
SYNOPSIS
DESCRIPTION
The nng_http_conn_read_all() 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.
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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 only when the entire amount of data requested has been read, or an error has occurred. If the operation completes successfully, then the entire requested data has been read.
It is still possible for a partial read to complete in the event of an error.
The actual number of bytes read can be determined with
nng_aio_count().
The main purpose for this function is to facilitate reading HTTP
body content, after first determining the length of the body content
from the relevant HTTP headers (typically Content-Length).
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RETURN VALUES
None.
ERRORS
NNG_ECANCELED
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The operation was canceled. |
NNG_ECLOSED
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The connection was closed. |
NNG_ECONNRESET
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The peer closed the connection. |
NNG_EINVAL
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The aio does not contain a valid scatter/gather vector. |
NNG_ENOMEM
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Insufficient free memory to perform the operation. |
NNG_ENOTSUP
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HTTP operations are not supported. |
NNG_ETIMEDOUT
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Timeout waiting for data from the connection. |