(VB.NET UWP/WinRT) HTTP HEAD Request

Sends an HTTP HEAD request and gets the response.

Note: The response to an HTTP HEAD request is always just the response header. The reponse body is always 0 length (thus the reason it's called a "HEAD" request..)

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

Dim http As New Chilkat.Http

' If the URL uses "https://", then the connection will be TLS.
' Otherwise it will be TCP.
Dim resp As Chilkat.HttpResponse = Await http.GetHeadAsync("https://example-code.com/")
If (http.LastMethodSuccess <> True) Then
    ' A failure is when we don't get any response.  It could be a timeout, an inability to connect, etc.
    ' For example, a "404 Not Found" response is still a response, and thus deemed success in terms of the API..
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' Examine the response.
Debug.WriteLine("Status Code = " & resp.StatusCode)
Debug.WriteLine("Status Line = " & resp.StatusLine)
Debug.WriteLine("Status Text = " & resp.StatusText)
Debug.WriteLine("Full Response Header:")
Debug.WriteLine(resp.Header)
Debug.WriteLine("----")
Dim numHeaderFields As Integer = resp.NumHeaderFields
Debug.WriteLine("Num Header Fields: " & numHeaderFields)
Dim i As Integer
For i = 0 To numHeaderFields - 1
    Debug.WriteLine(resp.GetHeaderName(i) & ": " & resp.GetHeaderValue(i))
Next