How to solve cross domain permission with server proxy?

54 New Member

Hi,

I`m trying to read the href property of an iframe with a javascript that running in the main frame. When the main frame and the inner iframe are both from the same domain I can read it with:

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frames['innerFrame'].location.href

but when the inner frame is served from a different domain I run into cross domain permission issues.

Can I use proxy on my server to solve it?
For example let`s say the main frame urs is http://www.example1.co m and the inner frame url is http://www.example2.co m.
Can I use my server to let the client browser "think" the main frame is from www.example2.co m?
Maybe there is another way around this?

I`m using Apache and I realize it`s not a pure javascript question but it`s related.

Here is a short example to reproduce the cross domain permission issue:

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

        <title>iframe test</title>

        <script type="text/javascript">

            var alertHref = function() {

                alert(frames['innerFrame'].location.href);    

            }    

            window.onload = function() {

                // the time out just make sure the iframe is ready

                setTimeout(" alertHref()",3000); 

            };

        </script> 

    </head>

    <body>

        <iframe src="http://www.thescripts.com"

            id="innerFrame"

            width=1000

            height=500

            name="innerFrame">

        </iframe>

    </body>

</html>

Thanks

Sep 18 '07 #1

Subscribe Reply

3438

acoder

16,027

Recognized Expert Moderator MVP

You could use Ajax to make a request to your web server proxy. The proxy would then deal with making the request to the domain.

Sep 18 '07 #2

dolittle

New Member

Could you explain a bit more?

Thanks

You could use Ajax to make a request to your web server proxy. The proxy would then deal with making the request to the domain.

Sep 18 '07 #3

acoder

16,027

Recognized Expert Moderator MVP

You could use Ajax to make a request to your web server proxy. The proxy would then deal with making the request to the domain.

Since this is not possible with Javascript, use a server-side script to make the requests/connections. It gets the response and this would become available to the client-side Javascript via the XMLHttpRequest object.

Why do you want the href of the iframe or is that only a test?

Sep 19 '07 #4

dolittle

New Member

I want to know when the href of the iframe changes and to read it`s value. It`s not just a test. I have to do it with javascript and I have a feeling it`s possible with setting reverse proxy of the main frame to be the same domain as the iframe.

Thanks

Since this is not possible with Javascript, use a server-side script to make the requests/connections. It gets the response and this would become available to the client-side Javascript via the XMLHttpRequest object.

Why do you want the href of the iframe or is that only a test?

Sep 19 '07 #5

rnd me

427

Recognized Expert Contributor

the big issue here is that frames cannot talk to one another.
so, the info will have to take an alternate route be it the clipboard, an external file, or a server. you you can control scripts on both pages, you can set an onbefroeunload type event to update youre apache server that the frame navigated away, the hard part would be saying where it went. the simplest way could be to make a new image, and set its source to ping your server.
google image pinging...

you would then need to peroidically check the server from the master page to figure out when they left, since the server cannot 'push' info to the browser...

Sep 21 '07 #6

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