(Go) 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).

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    success := false

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

    http := Http_Ref.html">chilkat.NewHttp()

    resp := HttpResponse_Ref.html">chilkat.NewHttpResponse()
    success = http.HttpNoBody("HEAD","https://www.chilkatsoft.com/hamlet.xml",resp)
    if success == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        resp.DisposeHttpResponse()
        return
    }

    // Examine the response header.
    fmt.Println(resp.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.
    lastModStr := resp.GetHeaderField("Last-Modified")
    // If the header exists...
    if resp.LastMethodSuccess() == true {
        // Parse the RFC822 format date/time string
        ckdt := CkDateTime_Ref.html">chilkat.NewCkDateTime()
        ckdt.SetFromRfc822(*lastModStr)

        // If we want to access individual date/time parts (in the local timezone)
        dt := DtObj_Ref.html">chilkat.NewDtObj()
        ckdt.ToDtObj(true,dt)

        fmt.Println("day/month/year = ", dt.Day(), "/", dt.Month(), "/", dt.Year())
    }


    http.DisposeHttp()
    resp.DisposeHttpResponse()
    ckdt.DisposeCkDateTime()
    dt.DisposeDtObj()