Using Socket Program to Request Parameter Name

This section provides a tutorial example on how to use my socket test program, SocketRequestResponseBinary.pl, to play with the SOAP 1.1 request generated in the trace output of my SOAP::Lite test program.

In the previous tutorial, I noticed that the SOAP request message has the parameter element name set to "c-gensym3". But the GetSpeech Web service expects an element name of "Request".

Before looking at how to change the parameter element name with SOAP::Lite, I want to my socket test program .pl to perform some quick tests with the request generated by SOAP::Lite in the previous tutorial.

Based on the trace output GetSpeech_SOAPAction.pl, I prepared this socket request file, GetSpeech_SOAPAction.req:

POST /WSShakespeare.asmx HTTP/1.1
Host: www.xmlme.com
Accept: text/xml
Accept: multipart/*
Content-Length: 589
Content-Type: text/xml; charset=utf-8
SOAPAction: http://xmlme.com/WebServices/GetSpeech

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
  xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:xsd="http://www.w3.org/1999/XMLSchema"
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <SOAP-ENV:Body>
    <namesp1:GetSpeech xmlns:namesp1="http://xmlme.com/WebServices">
      <c-gensym3 xsi:type="xsd:string">To be, or not to be</c-gensym3>
    </namesp1:GetSpeech>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Here is what I did to convert the trace output of GetSpeech_SOAPAction.pl to this request file:

I am ready to send this request file to the server with SocketRequestResponseBinary.pl:

\herong>SocketRequestResponseBinary.pl www.xmlme.com 80 
   GetSpeech_SOAPAction.req GetSpeech_SOAPAction.res

\herong>>type GetSpeech_SOAPAction.res
HTTP/1.1 500 Internal Server Error
Connection: close
Date: ... 2009
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Content-Length: 623

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <soap:Body>
    <soap:Fault>
      <faultcode>soap:Server</faultcode>
      <faultstring>
        System.Web.Services.Protocols.SoapException: 
        Server was unable to process request. ---> 
        System.NullReferenceException: Object reference not set 
          to an instance of an object.
        at WSShakespeare.Shakespeare.GetSpeech(String Request)
        --- End of inner exception stack trace ---
      </faultstring>
      <detail />
    </soap:Fault>
  </soap:Body>
</soap:Envelope>

Ok. I got the same exception as my GetSpeech_SOAPAction.pl program. Now let me modify the request XML message based on my analysis in the previous tutorial, GetSpeech_Parameter_Name.req:

POST /WSShakespeare.asmx HTTP/1.1
Host: www.xmlme.com
Accept: text/xml
Accept: multipart/*
Content-Length: 619
Content-Type: text/xml; charset=utf-8
SOAPAction: http://xmlme.com/WebServices/GetSpeech

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
  xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:xsd="http://www.w3.org/1999/XMLSchema"
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <SOAP-ENV:Body>
    <namesp1:GetSpeech xmlns:namesp1="http://xmlme.com/WebServices">
      <namesp1:Request xsi:type="xsd:string">
        To be, or not to be
      </namesp1:Request>
    </namesp1:GetSpeech>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Here is what I did to try to fix the parameter name issue in the request XML message:

I am ready to test this new socket request:

\herong>SocketRequestResponseBinary.pl www.xmlme.com 80 
   GetSpeech_Parameter_Name.req GetSpeech_Parameter_Name.res

\herong>type GetSpeech_Parameter_Name.res
HTTP/1.1 200 OK
Connection: close
Date: ... 2009
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private, max-age=0
Content-Type: text/xml; charset=utf-8
Content-Length: 1942

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <soap:Body>
    <GetSpeechResponse xmlns="http://xmlme.com/WebServices">
      <GetSpeechResult><SPEECH><PLAY>HAMLET</PLAY>
        <SPEAKER>HAMLET</SPEAKER>To be, or not to be: 
        that is the question: Whether 'tis nobler in the mind 
        ...</SPEECH>
      </GetSpeechResult>
    </GetSpeechResponse>
  </soap:Body>
</soap:Envelope>

The modified request worked! I will to back to my GetSpeech_SOAPAction.pl program and try to find the SOAP::Lite function to generate the correct parameter name in the next tutorial.

Last update: 2009.

Table of Contents

 About This Book

 Introduction to Web Service

 Introduction to SOAP (Simple Object Access Protocol)

 SOAP Message Structure

 SOAP Message Transmission and Processing

 SOAP Data Model

 SOAP Encoding

 SOAP RPC Presentation

 SOAP Properties Model

 SOAP Message Exchange Patterns

 SOAP HTTP Binding

 SOAP Perl Implementations

 SOAP PHP Implementations

 SOAP Java Implementations

 Perl SOAP::Lite - SOAP Server-Client Communication Module

 Perl Socket Test Program for HTTP and SOAP

Perl SOAP::Lite for GetSpeech SOAP 1.1 Web Service

 GetSpeech Failed - Incorrect SOAPAction Header Line

 GetSpeech Failed - Incorrect Parameter Name c-gensym

Using Socket Program to Request Parameter Name

 GetSpeech Worked - Using SOAP::Data Class and on_action() Function

 GetSpeech_SOAP_1_1.pl - SOAP::Lite for SOAP 1.1 Web Service

 Perl SOAP::Lite 0.710 for SOAP 1.2 Web Services

 Perl SOAP::Lite 0.710 for WSDL

 PHP SOAP Extension Client Programs

 PHP SOAP Extension Server Programs

 Java Socket and HttpURLConnection for SOAP

 SAAJ - SOAP with Attachments API for Java

 SoapUI - SOAP Web Service Testing Tool

 WS-Security - SOAP Message Security Extension

 WS-Security X.509 Certificate Token

 Web Services and SOAP Terminology

 References

 PDF Printing Version