IBM Worklight 5.0.6.1 - How to configure gzip compression support?

Question

We are developing a hybrid mobile app using Worklight version 5.0.6.1.

I'd like to know how to apply gzip compression to improve performance by reducing the size of the content during data transmission.

I searched the infocenter: http://pic.dhe.ibm.com/infocenter/wrklight/v5r0m6/index.jsp?topic=%2Fcom.ibm.help.doc%2Fwl_home.html and stackoverflow a well as in Google, but could not find a solution.

Below is the outline of the architecture:

Mobile devices <=> Big IP <=> IIS 6 <=> WAS 8/Worklight 5.0.6

So my questions are:

1. I'm not quite sure whether I should need to setup gzip on either IIS or WAS or Worklight or all?
2. What about the WebSphere plugin config file plugin-cfg.xml? Do I need to configure anything in it to enable gzip?

I did find information on setting http compression on IIS6 below:

enable GZIP compression

Answer 1

Worklight 5.0.6 does not support GZIP compression. You can upgrade to Worklight 6.0 or higher where the app can request the Worklight server to send compressed data using the compressResponse option when making an invokeProcedure call . You have to enable compression in only IIS or Worklight not in both.