Tribblix: manual page: CURLINFO_CONTENT_LENGTH

CURLINFO_CONTENT_LENGTH_DOWNLOAD(3) Introduction to Library Functions

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).