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CURLINFO_CONTENT_LENGTH_DOWNLOAD

Section: C Library Functions (3)
Updated: 202-0-19
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NAME

CURLINFO_CONTENT_LENGTH_DOWNLOAD - 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. 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 result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

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

    if(result == CURLE_OK) {
      /* check the size */
      double cl;
      result = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
      if(result == CURLE_OK) {
        printf("Size: %.0fn", 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).