WSO2 ESB Overwrites ContentType Property

Question

I am working on a WSO2 ESB Proxy service, which includes providing an internal RESTful service through a SOAP endpoint on an ESB. My RESTful service requires Content-type = "application / rdf + xml". I tried to set it using all 3 properties mentioned in the documentation: messageType, ContentType and CONTENT_TYPE. However, the Content-type request is still "application / xml".

Here is an excerpt from my sequence that calls the REST service:

<property xmlns:ns="http://org.apache.synapse/xsd" name="REST_URL_POSTFIX" value="/record/12345" scope="axis2" type="STRING"/> <property name="HTTP_METHOD" value="PUT" scope="axis2" type="STRING"/> <property name="messageType" value="application/rdf+xml" scope="axis2" type="STRING"/> <property name="ContentType" value="application/rdf+xml" scope="axis2" type="STRING"/> <property name="CONTENT_TYPE" value="application/rdf+xml" scope="axis2" type="STRING"/> <send> <endpoint name="CQ"> <address uri="http://my_url" format="pox"> </address> <property xmlns:ns="http://org.apache.synapse/xsd" name="Authorization" expression="fn:concat('Basic ', base64Encode('username:password'))" scope="transport"/> <property name="OSLC-Core-Version" value="2.0" scope="transport"/> <property name="Accept" value="application/rdf+xml" scope="transport"/> </endpoint> </send> 

I tested it with TCPMon and no matter what Content-type property I use, the request still contains "application / xml".

Please advice.

Answer 1

Can you try the WSO2 ESB 4.7.0 with the following configuration? Please note that I changed the address format from "smallpox" to "rest"

  <property xmlns:ns="http://org.apache.synapse/xsd" name="REST_URL_POSTFIX" value="/record/12345" scope="axis2" type="STRING"/> <property name="HTTP_METHOD" value="PUT" scope="axis2" type="STRING"/> <property name="messageType" value="application/rdf+xml" scope="axis2" type="STRING"/> <property name="ContentType" value="application/rdf+xml" scope="axis2" type="STRING"/> <property name="CONTENT_TYPE" value="application/rdf+xml" scope="axis2" type="STRING"/> <send> <endpoint name="CQ"> <address uri="http://my_url" format="rest"> </address> <property xmlns:ns="http://org.apache.synapse/xsd" name="Authorization" expression="fn:concat('Basic ', base64Encode('username:password'))" scope="transport"/> <property name="OSLC-Core-Version" value="2.0" scope="transport"/> <property name="Accept" value="application/rdf+xml" scope="transport"/> </endpoint> </send> 

These are the HTTP headers sent now (taken from tcpmon)

 PUT /record/12345 HTTP/1.1 Cookie: region1_configure_menu=none; region3_registry_menu=none; region4_monitor_menu=none; region5_tools_menu=none; JSESSIONID=54D2911FCD5559C6B2F723E7C6FA9B44; requestedURI="../../carbon/service-mgt/index.jsp?region=region1&item=services_list_menu"; current-breadcrumb=manage_menu%2Cservices_menu%2Cservices_list_menu%23 Authorization: null OSLC-Core-Version: 2.0 Content-Type: application/rdf+xml Accept: application/rdf+xml Transfer-Encoding: chunked Host: www.foo.com:8080 Connection: Keep-Alive User-Agent: Synapse-PT-HttpComponents-NIO 

Answer 2

In the configuration you connected, you specified the uri address format as "smallpox".

 <address uri="http://my_url" format="pox"> 

This will cause you to always get the content type as application / xml. Remove this attribute and try. It should be

 <address uri="http://my_url"> 

If you still see the problem, try switching to NHTTP transport, as suggested by RaviU. To do this, you can first create the axis2.xml file (ESB_HOME / repository / conf / axis2 / axis2.xml) as axis2_back.xml and then rename the axis2_nhttp.xml file (same location) as axis2.xml.

Answer 3

Sometimes you need to enable these message formatting in the axis2.xml file before using them.

Check out this article. This may help if you have not done so already.
http://wso2.com/library/articles/axis2-configuration-part2-learning-axis2-xml#mf

Answer 4

Can you set the content type property as follows:

  <property name="Content-Type" value="application/rdf+xml" scope="transport"/> 

Remove other content type properties.

If you define it like this:

  [1]<property name="messageType" value="application/rdf+xml" scope="axis2" type="STRING"/> [2]<property name="ContentType" value="application/rdf+xml" scope="axis2" type="STRING"/> 

[1] to select messageformatter

[2] to select message builders

Change try like this

  <inSequence> <log level="custom"> <property name="in seq --------------of proxy" expression="$trp:Content-Type"/> </log> <property name="messageType" value="application/json" scope="axis2" type="STRING"/> <property name="Content-Type" value="application/json" scope="transport" type="STRING"/> <log level="custom"> <property name="in seq --------------of proxy" expression="$trp:Content-Type"/> </log> <send> <endpoint> <address uri="http://localhost:5555/com"/> </endpoint> </send>