WSO2 ESB: Unexpected Character Error when submitting JSON to Proxy Service

Question

I\'m attempting to retrieve data from Facebook using the WSO2 Facebook Connector in WSO2 ESB 4.9.0. I\'ve provided the proxy configuration below.

Answer 1

Many thanks @RavindraRanwala and @ThusithaThilinaDayaratne for leading me to the resolution of this issue.

After consulting the wire logs, it appears the Facebook API is responding with text/javascript content type. I had no message builder/formatter enabled within the ESB to handle this content type, so the process ended up failing. All I needed to do was open up my axis2.xml configuration file and append the following message builders:

<!--JSON Message Builders-->
<messageBuilder contentType="application/json" class="org.apache.synapse.commons.json.JsonStreamBuilder"/>
<messageBuilder contentType="text/javascript" class="org.apache.synapse.commons.json.JsonStreamBuilder"/>

... and formatters:

<!--JSON Message Formatters-->
<messageFormatter contentType="application/json" class="org.apache.synapse.commons.json.JsonStreamFormatter"/>
<messageFormatter contentType="text/javascript" class="org.apache.synapse.commons.json.JsonStreamFormatter"/>

The most up to date documentation on the Facebook connector seems to be at the GitHub page, where all the necessary builder/formatter information is clarified:

https://github.com/wso2/esb-connectors/tree/master/facebook/facebook-connector/facebook-connector-1.0.0