CURLINFO_FILETIME(3) Library Functions Manual CURLINFO_FILETIME(3)
NAME
CURLINFO_FILETIME - get the remote time of the retrieved document
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_FILETIME, long *timep);
DESCRIPTION
Pass a pointer to a long to receive the remote time of the retrieved
document in number of seconds since January 1 1970 in the GMT/UTC time
zone. If you get -1, it can be because of many reasons (it might be un-
known, the server might hide it or the server does not support the com-
mand that tells document time etc) and the time of the document is un-
known.
You must ask libcurl to collect this information before the transfer is
made, by using the CURLOPT_FILETIME(3) option or you unconditionally get
a -1 back.
Consider CURLINFO_FILETIME_T(3) instead to be able to extract dates be-
yond the year 2038 on systems using 32-bit longs (Windows).
PROTOCOLS
This functionality affects ftp, http and sftp
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Ask for filetime */
curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
long filetime = 0;
res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
if((CURLE_OK == res) && (filetime >= 0)) {
time_t file_time = (time_t)filetime;
printf("filetime: %s", ctime(&file_time));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
AVAILABILITY
Added in curl 7.5
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
CURLOPT_FILETIME(3), curl_easy_getinfo(3), curl_easy_setopt(3)
libcurl 2026-07-12 CURLINFO_FILETIME(3)
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