VBA -- XMLHTTP POST method not working


I'm trying to upload data to a web server for the first time.

The VBA function I'm using is below. This is for Excel 2007.

As it is now, I get the error code 500 ("Internal Service Error") when adding msgbox XmlHttp.Status at the end of the function.

The XmlText variable I'm using can be recreated using the attached file.

I'm very confident that the URL, UserName, and Password I'm using are correct (I've successfully used the GET method for a different objective with this web server). Unfortunately, I can't post those things here due to non-disclosure issues.

Straightforward documentation from the web server is available here:

They say their service is exposed via a RESTful API. Maybe the function I'm using assumes SOAP. I don't know the difference as far as VBA is concerned.

Any suggestions greatly appreciated.

Function PostXmlData(vURL As String, UserName As String, Password As String, XmlText As String) As String

Dim XMLHttp As Object

Set XMLHttp = CreateObject("MSXML2.XMLHTTP")

XMLHttp.Open "POST", vURL, False, UserName, Password

' Not sure which 'setRequestHeader' to use, if any.
'XMLHttp.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"   ' Status error 400 returned (Bad Request)
XMLHttp.setRequestHeader "Content-Type", "text/xml;charset=utf-8"   ' Status error 500 returned (Internal Service Error)

XMLHttp.send (XmlText)

PostXmlData = XMLHttp.responseText

End Function

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Are you sure you can leave out the requestheader called content-length? It might not be necessary - but do check it...

    XMLHttp.setRequestHeader "Content-Length" , Str(Len(XmlText))

I can't see from your code that you are supplying a valid API-key either...
In a post it should be sent as a part of any request according to the links you provided...

bishop3000Author Commented:
Hi yogi4life,

Thanks a lot for your help.

The issue is that my xml text wasn't written correctly.
--I needed to add the following to my code (as the first line in the XML).
XmlText = "<?xml version=" & vQuote & "1.0" & vQuote & " " & "encoding=" & vQuote & "utf-8" & vQuote & "?>"

No, the content-length info isn't necessary, perhaps because it's REST.

Code that properly uploads XML text to the web is below.

Function XML_POST_PC(vURL As String, XmlText As String, UserName As String, Password As String) As String

Dim XMLHttp As Object

Set XMLHttp = CreateObject("MSXML2.XMLHTTP")    '  CreateObject("MSXML2.ServerXMLHTTP") -- a alternative with less freezing according to this post: http://www.bigresource.com/Tracker/Track-vb-50L5ormYPR/

XMLHttp.Open "POST", vURL, False, UserName, Password

XMLHttp.setRequestHeader "Content-Type", "text/xml"   ';charset=utf-8

XMLHttp.Send (XmlText)

XML_POST_PC = XMLHttp.ResponseText

End Function

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