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// Array of JSONP callbacks, starting with default error handler (ajax.js)
HashOverConstructor.jsonp = [
function (json) { alert (json.message); }
];
// Send HTTP requests using either XMLHttpRequest or JSONP (ajax.js)
HashOverConstructor.prototype.ajax = function (method, path, data, callback, async)
{
// Check if the browser supports location origin
if (window.location.origin) {
// If so, use it as-is
var origin = window.location.origin;
} else {
// If not, construct origin manually
var protocol = window.location.protocol;
var hostname = window.location.hostname;
var port = window.location.port;
// Final origin
var origin = protocol + '//' + hostname + (port ? ':' + port : '');
}
// Create origin regular expression
var originRegex = new RegExp ('^' + origin + '/', 'i');
// Check if script is being remotely accessed
if (originRegex.test (this.constructor.script.src) === false) {
// If so, get constructor name
var source = this.constructor.toString ();
var constructor = source.match (/function (\w+)/)[1];
// Push callback into JSONP array
this.constructor.jsonp.push (callback);
// Add JSONP callback index and constructor to request data
data.push ('jsonp=' + (this.constructor.jsonp.length - 1));
data.push ('jsonp_object=' + constructor || 'HashOver');
// Create request script
var request = this.elements.create ('script', {
src: path + '?' + data.join ('&'),
async: async
});
// And append request script to page
document.body.appendChild (request);
} else {
// If not, create AJAX request
var request = new XMLHttpRequest ();
// Set callback as ready state change handler
request.onreadystatechange = function ()
{
// Do nothing if request wasn't successful in a meaningful way
if (this.readyState !== 4 || this.status !== 200) {
return;
}
// Parse response as JSON
var json = JSON.parse (this.responseText);
// Execute callback
callback.apply (this, [ json ]);
};
// And send request
request.open (method, path, async);
request.setRequestHeader ('Content-type', 'application/x-www-form-urlencoded');
request.send (data.join ('&'));
}
};
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