Perl

Get the Last-Modified Date Before HTTP Download

See more HTTP Examples

Demonstrates how to send a HEAD request to get the last-modified date of a file on a web server (without downloading the file). Perl

use chilkat();

$success = 0;

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$http = chilkat::CkHttp->new();

$resp = chilkat::CkHttpResponse->new();
$success = $http->HttpNoBody("HEAD","https://www.chilkatsoft.com/hamlet.xml",$resp);
if ($success == 0) {
    print $http->lastErrorText() . "\r\n";
    exit;
}

# Examine the response header.
print $resp->header() . "\r\n";

# Here is a sample response header:

# 	Content-Length: 279658
# 	Content-Type: text/xml
# 	Last-Modified: Thu, 12 May 2016 15:14:08 GMT
# 	Accept-Ranges: bytes
# 	ETag: "c1cd8bee60acd11:0"
# 	Server: Microsoft-IIS/8.5
# 	X-Powered-By: ASP.NET
# 	X-Powered-By-Plesk: PleskWin
# 	Date: Thu, 25 Jul 2019 16:40:54 GMT

# Get the Last-Modified header.
$lastModStr = $resp->getHeaderField("Last-Modified");
# If the header exists...
if ($resp->get_LastMethodSuccess() == 1) {
    # Parse the RFC822 format date/time string
    $ckdt = chilkat::CkDateTime->new();
    $ckdt->SetFromRfc822($lastModStr);

    # If we want to access individual date/time parts (in the local timezone)
    $dt = chilkat::CkDtObj->new();
    $ckdt->ToDtObj(1,$dt);

    print "day/month/year = " . $dt->get_Day() . "/" . $dt->get_Month() . "/" . $dt->get_Year() . "\r\n";
}