# JSONP Example

This example demonstrates how to use JSONP wrapper in order to serve not only JSON but also a JavaScript expression representing a function call with the original JSON data as a parameter. The technique is well described e.g. at http://en.wikipedia.org/wiki/JSON#JSONP.

A simple web application is presented with just one resource: a change record list. A client can obtain the list using XML or JSON or JavaScript representation. The last change record is also available in all three formats as a subresource of the previously mentioned list resource.

## Contents

The change record list web resource is implemented by `com.sun.jersey.samples.jsonp.resources.ChangeList` class.

The mapping of the URI path space is presented in the following table:

URI path | Resource class | HTTP methods
--- | --- | ---
/changes | ChangeList | GET
/changes/latest | ChangeList | GET

## Running the Example

Run the example as follows:

>     mvn clean compile exec:java

This deploys the JSONP example using Grizzly

A WADL description may be then accessed at the URL:

> `http://localhost:9998/jsonp/application.wadl`

Following steps are using cURL command line tool:

Get the list of changes in JSON format:

>     curl -HAccept:application/json http://localhost:9998/jsonp/changes

Get the list of changes in XML format:

>     curl -HAccept:application/xml http://localhost:9998/jsonp/changes

Get the list of changes as a JavaScript callback:

>     curl -HAccept:application/x-javascript http://localhost:9998/jsonp/changes

You can also see test classes at `src/main/test` subdirectory for detail information how to consume the service using Jersey client API

### JavaScript Client

After starting the service and refreshing this page, a list of changes should be displayed below:

You need to run the service first!