NumberToWords Failed - Invalid namespace ""

SOAP Web Service Tutorials - Herong's Tutorial Examples

∟Perl SOAP::Lite for NumberToWords SOAP 1.1 Web Service

∟NumberToWords Failed - Invalid namespace ""

This section provides a tutorial example on how to use the SOAP::Data class to build the request parameter element with correct element name. But the test failed with an error: Invalid namespace ''.

In the previous tutorial, I learned that the server does not like the parameter name "c-gensym3" generated with SOAP::Lite default setting.

What SOAP::Lite function should I use to fix this issue? Looking at the ActivePerl SOAP::Lite manual again, I found this class:

SOAP::Data
   You can use this class if you want to specify a value, a name, 
   atype, a uri or attributes for SOAP elements (use value(), name(), 
   type(), uri() and attr() methods correspondingly). For example, 
   SOAP::Data->name('abc')->value(123) will be serialized into 
   <abc>123</abc>, as well as will SOAP::Data->name(abc => 123). Each 
   of them (except the value() method) can accept a value as the 
   second parameter. All methods return the current value if you call 
   them without parameters. The return the object otherwise, so you 
   can stack them.

Based on the above description I revised my test program as NumberToWords_Parameter_Name.pl:

#- NumberToWords_Parameter_Name.pl
#- Copyright (c) 2005 HerongYang.com. All Rights Reserved.
#
   use SOAP::Lite +trace;
   my $client = SOAP::Lite->new();
   $client->proxy(
      'http://www.dataaccess.com/webservicesserver/NumberConversion.wso');

#- Building the parameter element with name and namespace
   my $parameter = SOAP::Data
        ->name("ubiNum")
        ->value(101);

#- Calling the server
   my $som = $client->NumberToWords($parameter);
   my $output = $som->result;
   print $output . "\n";

Here is what I did in this program:

The string parameter is replaced with a SOAP::Date object, $parameter, when calling the Web service method NumberToWords().
"ubiNum" is added with name() as the name for $parameter.
"101" is added with value() as the value for $parameter.
When calling NumberToWords($parameter), $parameter will be serialized as the parameter element.

When executing NumberToWords_Parameter_Name.pl, I got this:

herong> NumberToWords_Parameter_Name.pl

...
SOAP::Transport::HTTP::Client::send_receive: HTTP::Request=HASH(0x305cb20)
SOAP::Transport::HTTP::Client::send_receive: POST 
   http://www.dataaccess.com/webservicesserver/NumberConversion.wso 
   HTTP/1.1
Accept: text/xml
Accept: multipart/*
Accept: application/soap
Content-Length: 437
Content-Type: text/xml; charset=utf-8
SOAPAction: "#NumberToWords"

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope
 soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
 xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soap:Body>
        <NumberToWords>
            <ubiNum xsi:type="xsd:int">101</ubiNum>
        </NumberToWords>
    </soap:Body>
</soap:Envelope>

SOAP::Transport::HTTP::Client::send_receive: HTTP::Response=HASH(0x305ffc0)
SOAP::Transport::HTTP::Client::send_receive: 
   HTTP/1.1 500 Internal Server Error

Cache-Control: private, max-age=0
Connection: close
Server: Microsoft-IIS/8.0
Content-Length: 392
Content-Type: text/xml; charset=utf-8
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: content-type
Access-Control-Allow-Methods: GET, POST
Access-Control-Allow-Origin: http://www.dataaccess.com
Client-Response-Num: 1
Strict-Transport-Security: max-age=31536000
Web-Service: DataFlex 18.1

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <soap:Fault>
      <faultcode>soap:Server</faultcode>
      <faultstring>Error processing request: Invalid namespace '' 
expected 'http://www.dataaccess.com/webservicesserver/'</faultstring>
      <detail/>
    </soap:Fault>
  </soap:Body>
</soap:Envelope>
...

Too bad. The call fails again with a different error: Invalid namespace ''. SOAP::Lite is not setting any namespace for SOAP body message. I will try to fix the issue in the next tutorial.