use fiddler to create soap request

0. Tools > Fiddler options > https tab > check Decrypt HTTPS traffic

1. Request builder > POST xxx/service

2. Request Headers 

Host: xxx:12001
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "http://xxx:12001/xxx/service"
Content-Length: 352

3. Request Body

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:impl="http://impl.webservice.xxx.com/">
<soapenv:Header/>
<soapenv:Body>
<impl:foo>
<arg0>12345</arg0>
</impl:foo>
</soapenv:Body>
</soapenv:Envelope>

4Execute!