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

This functionality affects all supported protocols

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);


      }


    }


  }
}

DEPRECATED

Deprecated since 7.55.0.

AVAILABILITY

Added in curl 7.6.1

RETURN VALUE

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

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