CURLINFO_HEADER_SIZE(3)    Library Functions Manual    CURLINFO_HEADER_SIZE(3)

NAME
       CURLINFO_HEADER_SIZE - get size of retrieved headers

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);

DESCRIPTION
       Pass a pointer to a long to receive the total size of all the headers
       received. Measured in number of bytes.

       The total includes the size of any received headers suppressed by
       CURLOPT_SUPPRESS_CONNECT_HEADERS(3).

PROTOCOLS
       All

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
           res = curl_easy_perform(curl);
           if(res == CURLE_OK) {
             long size;
             res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size);
             if(!res)
               printf("Header size: %ld bytes\n", size);
           }
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY
       Added in 7.4.1

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLINFO_REQUEST_SIZE(3), CURLINFO_SIZE_DOWNLOAD(3),
       curl_easy_getinfo(3), curl_easy_setopt(3)

libcurl                          April 26 2024         CURLINFO_HEADER_SIZE(3)