Class: Request.JSONP

Creates a JSON request using script tag injection and handles the callbacks for you.

Tutorial/Demo

• Online Tutorial/Demo

Implements

• Options, Events

Syntax

new Request.JSONP(options);

Arguments

1. options - (object) an object with key/value options

Options

• url - (url) the url to get the JSON data
• callbackKey - (string) the key in the url that the server uses to wrap the JSON results. So, for example, if you used callbackKey: 'callback' then the server is expecting something like http://..../?q=search+term&callback=myFunction; defaults to "callback". This must be defined correctly.
• data - (object) additional key/value data to append to the url
• retries - (integer; defaults to zero) if this value is a positive integer, the JSONP request will abort after the duration specified in the timeout option and fire again until the number of retries has been exhausted.
• timeout - (integer; defaults to zero) the duration to wait before aborting a request or retrying.
• injectScript - (mixed; defaults to document head) where to inject the script elements used for the calls
• log - (boolean) if true, sends logging messages to Log (to console if it's defined). Defaults to false.

Events

• onComplete - (function, optional) callback to execute when the data returns; it will be passed the data and the instance of Request.JSONP that requested it.

Example

new Request.JSONP({
  url: 'http://api.cnet.com/restApi/v1.0/techProductSearch',
    data: {
        partTag: 'mtvo',
        iod: 'hlPrice',
        viewType: 'json',
        results: '100',
        query: 'ipod'
    },
    onComplete: myFunction.bind(someObject)
}).send();

The above example would generate this url:

http://api.cnet.com/restApi/v1.0/techProductSearch?partTag=mtvo&iod=hlPrice&viewType=json&results=100&query=ipod&callback=Request.JSONP.requests[0].handleResults&

It would embed a script tag (in the head of the document) with this url and, when it loaded, execute the "myFunction" callback defined.

Logging

Request.JSONP logs I/O operations to MooTools.log, which is a function that simply passes arguments into an array called MooTools.logged. You can redefine MooTools.log so that I/O operations show up in your preferred logger (like Firebug). Until you redefine it, log messages are cashed in the MooTools.logged array so that you can retrieve any messages already logged before you remap the method. For example, you might do this:

    MooTools.log = console.log.bind(console);
    //then dump any existing logs to the console:
    MooTools.logged.each(function(log){
        console.log.apply(console, log);
    });

Request.JSONP Method: send

Executes the JSON request.

Syntax

myJsonP.send([options]);

Arguments

1. options - (object; optional) key/value options that configure the request. Can either be the same as (or a subset of) the options for the class, an element (such as a form) whose child inputs will be converted into a query string, or a query string.

Returns

• (object) This instance of Request.JSONP

Request.JSONP Method: send

Executes the JSON request.

Syntax

myJsonP.send();

Returns

• (object) This instance of Request.JSONP