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lost on 12/05/13

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Last Edited at 12/05/13 11:30am

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Access Control Allow Origin simulation for IE8 and IE9

/ Published in: JavaScript

Usage:

https://goodguys.com
You should never see this

than just postMessage to an iframe with this HTML + JS, and wait for the reply. iframe will do request for you

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function checkOrigin(origin) {
    var allows = $('.allow-origin');
    for (var i = 0; i < allows.length; i++) {
        var allow = $(allows[i]).text();
        if (allow == "*")
            return true;
        if (allow == origin)
            return true;
    }
    return false;
}

function messageHandler(e) {
    var origin = e.originalEvent.origin;
    if (!checkOrigin(origin))
        return;

var request = JSON.parse(e.originalEvent.data);
    
    // TODO remove this IF after testing
    if (origin == "file:" || origin == "null")
        origin = "*";

$.ajax(request.ajax)
        .done(function (data) {
            request.result = data;
            var reply = JSON.stringify(request);
            parent.postMessage(reply, origin);
        })
        .fail(function (req) {
            request.error = req.statusText;
            request.errorCode = req.status;
            var reply = JSON.stringify(request);
            parent.postMessage(reply, origin);
        });
}

$(document).on('ready', function () {
    $(window).on('message', messageHandler);
});

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