Asp Classic Calling webservice with SOAP Request

Question

I'm trying to get a response from a ASP.NET webservice without using the get parameters. I have the following code.

strBarcode = "ABC123
strURL ="http://serverName/BarcodeGenerator.asmx"
Set xmlReq = Server.CreateObject("Msxml2.DOMDocument.3.0")
Set xmlResp = Server.CreateObject("Msxml2.DOMDocument.3.0")
Set httpReq = Server.CreateObject("MSXML2.ServerXMLHTTP") 


xmlReq.async = false
strXML = CStr(CreateRequest(strBarcode ))

xmlReq.loadXML(CStr(strXML))

//Open, async

httpReq.open "POST", CStr(strURL), true 

httpReq.setRequestHeader "Host", "serverName"
httpReq.setRequestHeader "Content-Type", "text/xml; charset=utf-8"
httpReq.setRequestHeader "SOAPAction", "http://tempuri.org/GetBarcode"

httpReq.send(xmlReq)



strDone = "0"
bTimeout = false
dStart = Now()
dEnd = Now()
lCounter = 0
lCounterPrev = -1 
intStatus = 0
Do while intStatus <> 4 and (Not bTimeout)
   dEnd = Now()
   lCounter = DateDiff("s",dStart,dEnd)

   if lCounter > 30 then bTimeout = True       
   %>. <%      
   'Wait a second
   httpReq.waitForResponse 1000
   intStatus = httpReq.readyState
Loop

If httpReq.readyState = 4 Then
    bTimeout = false
    Set xmlResp = httpReq.responseXML
    %>
    Status: <%=httpReq.statusText%><BR>
    Response: <%=httpReq.responseText%> <BR><BR>
    <%
    Set nodes = xmlResp.getElementsByTagName("GetBarcodeResult")
    If (nodes is nothing) THen
    %>Nodes is NULL<BR><%
    Else
    %>Number of Nodes: <%=nodes.length%><%
    End IF
    Set node = nodes(0)
    url = node.nodeValue
End If

The status is

Status: Bad Request

and the response is

Response: Bad Request (Invalid Hostname)

What am I doing wrong?

Answer 1

This article explains it best, but basically, due to IIS configuration the server was unable to locate itself (the classic-asp and webservice were hosted on the same server). There are no problems with the code. Please answer with related materials.

Answer 2

Your code is attempting to set the Host header itself. You should not be doing this.

ServerXMLHTTP will do this for you drawing the host string from the URL provided. By attempting to add it yourself you are corrupting an important criteria for the HTTP protocol. Host is the most fundemental header in the 1.1 protocol, it is the only header that must be present in a 1.1 request.

I'm not sure why you are using an asynchronous request and WaitForResponse just to detect a timeout. Why not use the setTimeouts method and a synchronous request?