CURLINFO_CONTENT_LENGTH_DOWNLOAD(3)                   Library Functions Manual

NAME
       CURLINFO_CONTENT_LENGTH_DOWNLOAD - get content-length of download

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
                                  double *content_length);

DESCRIPTION
       Pass a pointer to a double to receive the content-length of the
       download. This is the value read from the Content-Length: field. Since
       7.19.4, this returns -1 if the size is not known.

       CURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3) is a newer replacement that
       returns a more sensible variable type.

PROTOCOLS
       All

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

           /* Perform the request */
           res = curl_easy_perform(curl);

           if(!res) {
             /* check the size */
             double cl;
             res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
             if(!res) {
               printf("Size: %.0f\n", cl);
             }
           }
         }
       }

AVAILABILITY
       Added in 7.6.1. Deprecated since 7.55.0.

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

SEE ALSO
       CURLINFO_CONTENT_LENGTH_UPLOAD(3), curl_easy_getinfo(3),
       curl_easy_setopt(3)

libcurl                          April 26 2024
                                           CURLINFO_CONTENT_LENGTH_DOWNLOAD(3)