The SOAP action specified on the message, '', does not match the HTTP SOAP Action, 'urn:abc'.

See more:

VB

WCF

webservice

Server Side

<ServiceContract(Name:="Services")> _
Public Interface ICPServices

    <OperationContract(Action:="urn:abc", Name:="abc")> _
    Function abc(nameAs String) As String

End Interface

web.config

<bindings>
      <wsHttpBinding>
        <binding name="ws">
          <security mode="None"></security>
        </binding>
      </wsHttpBinding>
    </bindings>

<service name="CPServices.CPServices" >
        <endpoint address="" binding="wsHttpBinding" contract="CPServices.ICPServices" bindingConfiguration="ws">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>

Client side send
Raw
POST http://localhost/CPServices.CPServices.svc/mex HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/soap+xml;charset=UTF-8;action="urn:abc"
Content-Length: 1230
Host: 117.53.152.172:81
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)'

Xml

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:typ="http://abc.com">
   <soap:Header/>
   <soap:Body>
      <typ:abc>
         <typ:name>?</typ:name>
      </typ:abc>
   </soap:Body>
</soap:Envelope>

Error

<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
   <s:Header>
      <a:Action s:mustUnderstand="1">http://www.w3.org/2005/08/addressing/fault</a:Action>
   </s:Header>
   <s:Body>
      <s:Fault>
         <s:Code>
            <s:Value>s:Sender</s:Value>
            <s:Subcode>
               <s:Value>a:ActionMismatch</s:Value>
            </s:Subcode>
         </s:Code>
         <s:Reason>
            <s:Text xml:lang="en-US">The SOAP action specified on the message, '', does not match the HTTP SOAP Action, 'urn:abc'.</s:Text>
         </s:Reason>
         <s:Detail>
            <a:ProblemHeaderQName>a:Action</a:ProblemHeaderQName>
         </s:Detail>
      </s:Fault>
   </s:Body>
</s:Envelope>

Isn't I setting wrong thing and cause it can't get soap action? Any solution?