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Using ASPTear

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Here's a list of the component's main features:

  • Supports GET and POST
  • Send query strings and POST data to the server
  • Access HTTP and HTTPS resources
  • Log in to secured sites with username/password

Basics
So how does it work? Currently, the component is really very simple as it supports only one method (server-side VBScript pseudocode given here):
 

Const Request_POST = 1
Const Request_GET = 2
Set xObj = Server.CreateObject("SOFTWING.AspTear")
strRetVal = xObj.Retrieve(strUrl, nRequestType, strQueryString|strPostData, _
                 strUsername, strPassword)

The file retrieved is returned as method return value (strRetVal; errors are returned with exceptions - see the samples). If you don't need to supply Username and Password, leave them empty (""). Thus, the simplest request looks like this:
 

strRetVal = xObj.Retrieve("http://www.alphasierrapapa.com/iisdev/",2,"","","")

Notice that I did not supply a document - the component supports redirects! Now let's get a little bit more sophisticated: POST a form to the server with form data. How is this form data formatted? It needs to have the following form,
 

variable1=value1&variable2=value2...

where value1 to n need to be URL-encoded. To URL-encode a string value, use Server.URLEncode (this is also mandatory for querystrings):

strPostData = "Name=" & Server.URLEncode("Christoph Wille") & _
              "&goto=" & Server.URLEncode("http://www.alphasierrapapa.com/")

The call to Retrieve now looks like this:

strRetVal = xObj.Retrieve("http://www.alphasierrapapa.com/",1,strPostData,"","")

The last thing to discuss is how to access SSL-secured items - it is as simple as replacing http:// with https:// in the strUrl parameter!

ASP Sample
This is a simple sample with two files: formpost.asp (Listing 1) which accepts a parameter and dumps it with the ALL_HTTP server variable; the second file is testretrieve.asp (Listing 2), which uses the component to retrieve the formpost.asp file and return it to the client.

Listing 1: formpost.asp

<%
Response.Write Request.ServerVariables("ALL_HTTP")
%>
<%
Response.Write Request.Form("test")
%>

<form method=post action="">
<input type=text name="test">
<input type=submit>
</form>

Listing 2: testretrieve.asp

<%
Const Request_POST = 1
Const Request_GET = 2

Set xobj = CreateObject("SOFTWING.ASPtear")
Response.ContentType = "text/html"
    
On Error Resume Next
' URL, action, payload, username, password
strRetval = xobj.Retrieve("http://DOMAINAME.COM/formpost.asp", _
                 Request_POST, "test=wille", "", "")

If Err.Number <> 0 Then
    Response.Write "<b>"
    If Err.Number >= 400 Then
        Response.Write "Server returned error: " & Err.Number
    Else
        Response.Write "Component/WinInet error: " & Err.Description
    End If
    Response.Write "</b>"
    Response.End
End If

Response.Write strRetval
%>
Go Back  If you have any questions: support@ITsGroup.org or Phone 1-780-701-7282.

 

 

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