Message format transformations with WSO2 ESB

With WSO2 ESB, you can easily convert the format of the messages which passes through. There are situations in which you get SOAP requests but the back end server accepts XML. In these situations, you should convert the SOAP request to XML (POX) before forwarding to the endpoint. This post explains how you can change the format of a SOAP request goes through WSO2 ESB.

Pre-requisites:
Download and install WSO2 ESB-3.X

Step 1
I use WSO2 WSAS as the backend, but you could use any server as you preferred. Start WSO2 WSAS and deploy Axis2Service

Step 2
Start WSO2 ESB and add the following configuration. Here, we specify the message format as POX in the endpoint configuration since we need to convert SOAP message to XML when forwarding it to the endpoint.

<sequence xmlns="http://ws.apache.org/ns/synapse" name="main">
<in>
<send>
<endpoint name="axis2service-epr">
<address uri="http://localhost:9763/services/Axis2Service" format="pox" />
</endpoint>
</send>
<</in>
<out>
<send />
</out>
</sequence>

Step 3
Send a SOAP1.1 message using a tool (SOAPUI, Jmeter, AB etc). If you look at the message transmission between ESB and the endpoint, you will notice the following messages

Request SOAP message:

POST / HTTP/1.1
SOAPAction: urn:echoString
Content-Length: 307
Content-Type: text/xml; charset=UTF-8
Host: 127.0.0.1:8281
Connection: Keep-Alive
User-Agent: Jakarta-HttpComponents-Bench/1.1

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://service.carbon.wso2.org">
<soapenv:Body>
<ser:echoString>
<ser:s>test</ser:s>
</ser:echoString>
</soapenv:Body> </soapenv:Envelope>


Message delivered to the endpoint:

POST /services/Axis2Service HTTP/1.1
Content-Type: application/xml; charset=UTF-8
SOAPAction: urn:echoString
Transfer-Encoding: chunked
Host: 127.0.0.1:9765
Connection: Keep-Alive
User-Agent: Synapse-HttpComponents-NIO

86
<ser:echoString xmlns:ser="http://service.carbon.wso2.org">
<ser:s>test</ser:s> </ser:echoString>0

Similarly, you can convert the message to SOAP1.2 or HTTP GET just by specifying the endpoint format.

Comments

Post a Comment

Popular posts from this blog

WSO2 Stratos - Introducing WSO2 middleware Platform as a Service (PaaS)

Image
Yesterday we released our newest integrated cloud middleware platform, WSO2 Stratos . It is now online and ready for use! For the past few years, WSO2 has been doing many releases based on revolutionary Carbon platform , which helped to consistently improve the platform with introducing latest state-of-art technologies. The initial releases of Carbon product platform intended to improve the features of the individual products. For example, a lot of core features were introduced to WSO2 ESB, WSAS, Governance Registry etc.. Then we focused on ease of integration and more component based model. We introduced Equinox based provisioning model to build your SOA platform by picking and choosing the components as and when you need. Then, the core product platform has been enhanced to support multi-tenancy. With the multi-tenant supported architecture at hand, our brilliant development team was able to introduce the first ever comprehensive middleware PaaS. Why is this so important? Now, WSO2 C...
Read more

Common mistakes to avoid in WSO2 ESB - 1 - "org.apache.axis2.AxisFault: The system cannot infer the transport information from the URL"

In the next few weeks, you could expect a series of blog posts from me which explain the remedies to avoid some common mistakes which we do when working with WSO2 ESB . This is the first of many. During the initial rounds of testing your integration solution or even in production systems, you may have come across the following error. org.apache.axis2.AxisFault: The system cannot infer the transport information from the URL .... Some of you may have struggled hours figuring out a solution to address this issue. Let me explain this error in detail and possible causes of this. So, next time when you see this error in your WSO2 ESB setup, you will not have to spend time unnecessarily googling everywhere. There can be many different causes of this error. I have observed  four main reasons. Cause 1 This is the simplest cause. Suppose, you have a proxy service similar to the following. <proxy xmlns="http://ws.apache.org/ns/synapse" name="MistakesTest...
Read more

Working with HTTP multipart requests in soapUI

Image
You can use HTTP request test step in soapUI to submit messages with various Content-Types.  In this post, we will have a quick look into the multipart/form-data requests in soapUI. multipart/form-data requests usually come into action when you do HTML form submissions with file attachments. For example, have a look at the following HTML form post. <form action="http://localhost:8090/CKFileUploadApp/UploadServlet" method="post" enctype="multipart/form-data"> <input type="file" name="file"> <input type="text" name="paramName"> <input type="submit" name="Submit" value="Upload File"> </form> In the forms like above, we have file upload option as a form input where we can upload a file along with the form submission. In that case, the request's HTTP content type will be multipart/form-data. How can we simulate such a request using soapUI...
Read more