SYNOPSIS
#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
const char *nng_http_req_get_header(nng_http_req *req, const char *key);DESCRIPTION
The nng_http_req_get_header() looks for an HTTP header key in
the request req, and returns the associated value if found,
or NULL if not found.
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: will not find anything.
RETURN VALUES
HTTP header value for key, if it exists, or NULL otherwise.
ERRORS
None.