curl_pushheader_bynum(3) - Man pages

curl_pushheader_bynum(3)    Library Functions Manual   curl_pushheader_bynum(3)

NAME
       curl_pushheader_bynum - get a push header by index

SYNOPSIS
       #include <curl/curl.h>

       char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num);

DESCRIPTION
       This  is  a function that is only functional within a CURLMOPT_PUSHFUNC-
       TION(3) callback. It makes no sense to try to use it  elsewhere  and  it
       has no function then.

       It  returns  the  value for the header field at the given index num, for
       the incoming server push request or NULL. The data pointed to  is  freed
       by  libcurl when this callback returns. The returned pointer points to a
       "name:value" string that gets freed when this callback returns.

PROTOCOLS
       This functionality affects http only

EXAMPLE
       /* output all the incoming push request headers */
       static int push_cb(CURL *parent,
                          CURL *easy,
                          size_t num_headers,
                          struct curl_pushheaders *headers,
                          void *clientp)
       {
         int i = 0;
         char *field;
         do {
            field = curl_pushheader_bynum(headers, i);
            if(field)
              fprintf(stderr, "Push header: %s\n", field);
            i++;
         } while(field);
         return CURL_PUSH_OK; /* permission granted */
       }

       int main(void)
       {
         CURLM *multi = curl_multi_init();
         curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_cb);
       }

AVAILABILITY
       Added in curl 7.44.0

RETURN VALUE
       Returns a pointer to the header field content or NULL.

SEE ALSO
       CURLMOPT_PUSHFUNCTION(3), curl_pushheader_byname(3)

libcurl                            2026-07-12          curl_pushheader_bynum(3)

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