Pulling variable from html within iframe

Question

I'm trying to pull an html variable from an iframe which is inside another div inside the iframe.

Here is the excerpt of the code I'm using:

var myVariable = $('#iframe-id').contents().find('.variable-inside').html();

The iframe has been give an id (#iframe-id) and the variable is inside "variable-inside" which is rendered inside the iframe.

For some reason this isn't working for me. Is there a problem with the code?

I'm aware this method can be used if both documents are on the same domain (iframe doc and other doc) but I can still use it if it's on the same domain, just different subdomains correct? Eg: iframe doc is at lorem.example.com and other doc is at ipsum.example.com)

Any help would be great. Thanks.

Jasper · Accepted Answer · 2012-08-27 17:21:40Z

2

Communication across sub-domains is not allowed (Cross-Domain-Policy), I've read about ways to get around it but have not tested these.

Here's one method: http://www.tomhoppe.com/index.php/2008/03/cross-sub-domain-javascript-ajax-iframe-etc/

The idea is to set document.domain = "yourdomain.com" on both the parent and child pages (untested).

answered Aug 27, 2012 at 17:21

Jasper

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5 Comments

Jasper Over a year ago

If push comes to shove, create a server-side proxy for the sub-domain-hosted-file. It would just grab the HTML from the external document and echo it out so you can access cross-domain data.

user1509333 Over a year ago

It worked! Just added <script type="text/javascript"> document.domain = 'example.com'; </script> to each page and it worked fine. Thank you.

el vis Over a year ago

it looks interesting, do you know if it works cross-domain ( not only sub-cross-domain ) ?

Jasper Over a year ago

I don't have the time to test right now but if anyone has access to two domains it'd be pretty easy to test :)

user1509333 Over a year ago

@pawlakppp Just searched and found this: jszen.blogspot.com/2005/03/cross-domain-security-woes.html It appears it can work but has some issues with security and browsers. EDIT: Actually being 7 years old it is probably not the best source.

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