直接写soap调用webservice的有关问题
我有一个 http://192.168.19.134/service/api.php?wsdl
做了简单的两个函数， feedback 和 add
我使用vb调用时，用soap toolkit很容易就可以调用了
Dim ss As New SoapClient30
ss.MSSoapInit "http://192.168.19.134/service/api.php?wsdl"
MsgBox ss.feedback("zzzz")
MsgBox ss.Add(34, 56)
但是想学习一下使用xmlhttp，通过soap来调用，应该怎么写？
url = "http://192.168.19.134/service/api.php?wsdl"
oXMLHttp.Open "POST", url, False
oXMLHttp.setRequestHeader "Content-Type", "text/xml; charset=utf-8"
oXMLHttp.setRequestHeader "Content-length", Len(URLEncode(postData))
oXMLHttp.setRequestHeader "Accept-Language", "zh-CN"
oXMLHttp.setRequestHeader "SOAPAction", "http://192.168.19.134/service/api.php?wsdl"
oXMLHttp.setRequestHeader "Host", "192.168.19.134"
oXMLHttp.Send URLEncode(postData)
postdata
postData = "<?xml version=""1.0"" encoding=""utf-8""?>"
postData = postData & "<soap:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"">"
postData = postData & "<soap:Body xmlns:m=""http://192.168.19.134/service/api.php?wsdl"">"
postData = postData & "<m:add>"
postData = postData & "<m:aa>1</m:aa>"
postData = postData & "<m:bb>2</m:bb>"
postData = postData + "</m:add>"
postData = postData + "</soap:Body>"
postData = postData + "</soap:Envelope>"
我这样写的消息发过去总是收到500的错误，到底是哪里错了呢？
------解决思路----------------------
用fiddler调试下，看看送出的数据是否正确。