(Lianja) Get the Last-Modified Date Before HTTP Download

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

Chilkat Lianja Extension Download Chilkat Lianja Extension

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

loHttp = createobject("CkHttp")

loResp = loHttp.GetHead("https://www.chilkatsoft.com/hamlet.xml")
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

// Examine the response header.
? loResp.Header

// 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.
lcLastModStr = loResp.GetHeaderField("Last-Modified")
// If the header exists...
if (loResp.LastMethodSuccess = .T.) then
    // Parse the RFC822 format date/time string
    loCkdt = createobject("CkDateTime")
    loCkdt.SetFromRfc822(lcLastModStr)

    // If we want to access individual date/time parts (in the local timezone)
    loDt = loCkdt.GetDtObj(.T.)
    ? "day/month/year = " + str(loDt.Day) + "/" + str(loDt.Month) + "/" + str(loDt.Year)
    release loDt
endif

release loResp


release loHttp
release loCkdt