WSO2 ESB calling a REST endpoint which expects a not chunked request

WSO2 ESB provides the following property mediator to remove the "Chunked" encoding type when calling SOAP endpoints. You can use the below configuration to call a SOAP endpoint which expects a non-chunked request (Request with "Content-Length" header).

<property name=”DISABLE_CHUNKING” value=”true” scope=”axis2″/>

Here is a sample proxy service configuration.

<?xml version=”1.0″ encoding=”UTF-8″?>
<proxy xmlns=”http://ws.apache.org/ns/synapse&#8221;
name=”SampleProxy_v1″
transports=”https”
startOnLoad=”true”
trace=”enable”>
<description/>
<target>
<inSequence>
<property name=”DISABLE_CHUNKING” value=”true” scope=”axis2″/>
         <send>
            <endpoint>
               <address uri="http://localhost:9764/services/HelloService" ></address>
            </endpoint>
         </send>
</inSequence>
<outSequence>
<send/>
</outSequence>
<faultSequence/>
</target>
<publishWSDL uri=”http://192.168.66.1:9764/services/HelloService?wsdl”/&gt;
</proxy>


If you need to call a REST endpoint without the "chunked" encoding, sometimes the above property mediator would not work. In that kind of situation, if you need to send "Content-Length" header which means "non-chunked" request, you can use the following 2 properties.

         <property name="FORCE_HTTP_CONTENT_LENGTH" value="true" scope="axis2"></property>
         <property name="COPY_CONTENT_LENGTH_FROM_INCOMING" value="true" scope="axis2"></property>


Here is a sample API definition for WSO2 ESB.

<api xmlns="http://ws.apache.org/ns/synapse" name="SampleAPI" context="test">
   <resource methods="POST" url-mapping="/*">
      <inSequence>
         <log level="custom">
            <property name="msg" value="Executing IN sequence"></property>
         </log>
         <property name="FORCE_HTTP_CONTENT_LENGTH" value="true" scope="axis2"></property>
         <property name="COPY_CONTENT_LENGTH_FROM_INCOMING" value="true" scope="axis2"></property>
         <send>
            <endpoint>
               <address uri="https://www.google.com" format="rest"></address>
            </endpoint>
         </send>
      </inSequence>
      <outSequence>
         <log level="custom">
            <property name="msg" value="Sending response"></property>
         </log>
         <send></send>
      </outSequence>
      <faultSequence>
         <log level="custom">
            <property name="msg" value="Error occurred "></property>
         </log>
         <send></send>
      </faultSequence>
   </resource>
</api>