简单代理无法获取JSON响应

Question

I am trying to connect to a site via a php proxy (this one: https://raw.github.com/cowboy/php-simple-proxy/master/ba-simple-proxy.php ), and this is the JavaScript function that does something with the response:

Edit: The code now looks like this. Still no cigar.

function exista(word) {

    alert(word);
    var proxy = 'ba-simple-proxy.php?url=';
    var uri = "http://api.wordreference.com/0.8/ff175/json/roen/" + word;
    uri = encodeURIComponent(uri);
    alert(proxy + uri);
    var cuvantulexista = 1;
    jQuery.ajax({
        "async": false,
        "url": proxy + uri,
        "dataType": 'json',
        "method": "GET",
        "success": function (data) {
            alert("HERE!");
            if (data.Error || data.Response)
                cuvantulexista = 0;
        }
    });
    return cuvantulexista;
}

The php file is situated in the same folder as the js file that contains the above function and in the public folder which contains the html file.

The problem is I don't get any response whatsoever and I can't really tell why.

I also included the php in the html like so:

<?php
    include("js/ba-simple-proxy.php");
?>

I am sorry for my extreme noobiness but it's my first time working with php and cross domain communication. Thank you. :)

Edit: The page is not hosted on a domain if that helps.

Edit2: So, I opened Google Chrome without --disable-web-security and I get this error again:

XMLHttpRequest cannot load file:///home/bogdan/Scrabble-Online/public/ba-simple-proxy.php?url=http%3A%2F%2Fapi.wordreference.com%2F0.8%2Fff175%2Fjson%2Froen%2FRHE. Origin null is not allowed by Access-Control-Allow-Origin. 

Yet, if I start it on localhost it doesn't show the message. It just doesn't connect. I am severely confused now.

Answer 1

To make a cross side request your target page needs to allow you to access:

header('Access-Control-Allow-Origin: *');

You can add this at the top of your proxy script. Better replace * with your domain.

However file:// URLs can't be authorized. So you need to have a real domain.

Also see https://stackoverflow.com/a/3744697/956397