Can a WSDL indicate the SOAP version 1 1 or 1 2 of the web service

Question

Is it possible to see if a web service uses SOAP 1 1 or 1 2  based on the information in the WSDL

User · Answer

Found transport-attribute in binding-element which tells us that this is the WSDL 1.1 binding for the SOAP 1.1 HTTP binding.

ex.

<wsdlsoap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>

User · Answer

SOAP 1 1 uses namespace http   schemas xmlsoap org wsdl soap   SOAP 1 2 uses namespace http   schemas xmlsoap org wsdl soap12   The wsdl is able to define operations under soap 1 1 and soap 1 2 at the same time in the same wsdl  Thats useful if you need to evolve your wsdl to support new functionality that requires soap 1 2  eg  MTOM   in this case you dont need to create a new service but just evolve the original one

User · Answer

Yes you can usually see what SOAP version is supported based on the WSDL   Take a look at Demo web service WSDL  It has a reference to the soap12 namespace indicating it supports SOAP 1 2  If that was absent then you d probably be safe assuming the service only supported SOAP 1 1

User · Answer

I have found this page  http   schemas xmlsoap org wsdl soap12 soap12WSDL htm  which says that Soap 1 2 uses the new namespace http   schemas xmlsoap org wsdl soap12   It is in the  WSDL 1 1 Binding extension for SOAP 1 1

User · Answer

In WSDL  if you look at the Binding section  you will clearly see that soap binding is explicitly mentioned if the service uses soap 1 2  refer the below sample    lt binding name  EmployeeServiceImplPortBinding  type  tns EmployeeServiceImpl  gt   lt soap12 binding transport  http   schemas xmlsoap org soap http  style  document   gt   lt operation name  findEmployeeById  gt       lt soap12 operation soapAction     gt       lt input gt  lt soap12 body use  literal   gt  lt  input gt       lt output gt  lt soap12 body use  literal   gt  lt  output gt   lt  operation gt  lt operation name  create  gt       lt soap12 operation soapAction     gt       lt input gt  lt soap12 body use  literal   gt  lt  input gt       lt output gt  lt soap12 body use  literal   gt  lt  output gt   lt  operation gt   lt  binding gt    if the web service use soap 1 1  it will not explicitly define any soap version in the WSDL file under binding section  refer the below sample    lt binding name  EmployeeServiceImplPortBinding  type  tns EmployeeServiceImpl  gt   lt soap binding transport  http   schemas xmlsoap org soap http  style  rpc   gt   lt operation name  findEmployeeById  gt       lt soap operation soapAction     gt       lt input gt  lt soap body use  literal  namespace  http   jaxb ws jax samples chathurangaonline com    gt  lt  input gt       lt output gt  lt soap body use  literal  namespace  http   jaxb ws jax samples chathurangaonline com    gt  lt  output gt   lt  operation gt  lt operation name  create  gt       lt soap operation soapAction     gt       lt input gt  lt soap body use  literal  namespace  http   jaxb ws jax samples chathurangaonline com    gt  lt  input gt       lt output gt  lt soap body use  literal  namespace  http   jaxb ws jax samples chathurangaonline com    gt  lt  output gt   lt  operation gt   lt  binding gt    How to determine the SOAP version of the SOAP message   but remember that this is not much recommended way to determine the soap version that your web services uses  the version of the soap message can be determined using one of following ways   1  checking the namespace of the soap message  SOAP 1 1  namespace   http   schemas xmlsoap org soap envelope  SOAP 1 2 namespace    http   www w3 org 2003 05 soap-envelope   2  checking the transport binding information  http header information  of the soap message  SOAP 1 1    user text xml for the Context-Type     POST  MyService HTTP 1 1    Content-Type  text xml  charset  utf-8     Content-Length  xxx    SOAPAction   urn uuid myaction    SOAP 1 2    user application soap xml for the Context-Type     POST  MyService HTTP 1 1    Content-Type  application soap xml  charset  utf-8     Content-Length  xxx    SOAPAction   urn uuid myaction    3  using SOAP fault information  The structure of a SOAP fault message between the two versions are different

[web-services] Can a WSDL indicate the SOAP version (1.1 or 1.2) of the web service?

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