#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
int nng_http_res_add_header(nng_http_res *res, const char *key,
const char *val);| This documentation is for version v1.6.0 of NNG, but the latest released version is v1.10.0. see the documentation for v1.10.0 for the most up-to-date information. |
nng_http_res_add_header(3http)
NAME
nng_http_res_add_header - add HTTP response header
SYNOPSIS
DESCRIPTION
The nng_http_res_add_header() adds an HTTP header for the response
res and the key to the val.
The key and val are copied.
If a header with the value of key already exists, then a comma and whitespace separate are appended to it, followed by val.
If no such header already exists, then one is created with the value val.
| The HTTP specification requires that duplicate headers be treated identically to a single header with multiple comma-delimited values. |
See nng_http_res_set_header() if
replacement of an existing header rather than appending to it is desired.
|
The value of key is case insensitive, and should not include the final
colon in an HTTP header. For example, specifying Host or hOSt are
equivalent, whereas the value Host: is not a legal header key.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ENOMEM
|
Insufficient memory to perform the operation. |
NNG_ENOTSUP
|
No support for HTTP in the library. |