A jQuery plugin for accessing any URL, using YQL or another proxy.

$.proxyGet.js

$.proxyGet = function ( url, callback, options ) {

    // reject anything that doesn't resemble a "plain" URL or a null (see below)
    if (! (url === null || /^(https?:|\/\/)/.test(url))) {
        throw new SyntaxError('Expected a URL.');
    }
    
    // allow detection of current SSL mode by starting the url with '//'
    if (url && url.indexOf('//') === 0) {
        url = window.location.protocol + url;
    }
    
    // you are strongly advised to choose a different proxy. YQL "from html" is a toy !! 
    var yql_proxy = {
        
        // a url with or without a '--URL--' placeholder
        // -- the placeholder will be replaced by the url param
        // -- use a null url param if the proxy url is requestable as is
        url: 'http://query.yahooapis.com/v1/public/yql' + '?q=' + encodeURIComponent('select * from html where url="--URL--" and compat="html5" and xpath="*"') + '&format=xml',
        
        // null (no action) or a function that takes response data and returns clean data
        cleanup: function (data) {
            data = data.results && data.results[0];
            if (! data) return null;
            data = data.replace(/
/ig, "\r").replace(/
/ig, "\n");
            return data;
        },
        
        // null (no action) or a function that takes clean data and returns filtered data
        filter: null
    };
    
    // use YQL proxy by default, but allow for customizations
    options = $.extend(yql_proxy, options || {});
    
    // make the jsonp request
    var jsonp_url = options.url.replace('--URL--', encodeURIComponent(url)) + '&callback=?';
    $.getJSON( jsonp_url, function (data) {
        if ($.isFunction(callback)) {
            if ($.isFunction(options.cleanup)) {
                data = options.cleanup(data);
                if ($.isFunction(options.filter)) {
                    data = options.filter(data);
                }
            }
            callback(data);
        }
    } );
    
};

See http://andowebsit.es/blog/noteslog.com/post/how-to-workaround-the-same-origin-policy/