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 isn't known.

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

PROTOCOLS

       HTTP(S)

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://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

RETURN VALUE

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

SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_CONTENT_LENGTH_UPLOAD(3),

libcurl 7.58.0                                    June 15, 2017              CURLINFO_CONTENT_LENGTH_DOWNLOAD(3)