How to redirect js file with Javascript based on referer

Question

I have a website mydomain.com

I want,

If visitor mydomain.com come from images.google.com then call otherdomain.com/file1.js
If visitor come from another domain, then call otherdomain.com/file2.js

What sort of script should I be using on my domain to do this?mydomain.com

Matt · Accepted Answer · 2012-05-11 14:29:18Z

1

The only option you've got is to use document.referrer; but it is not reliable or trustworthy.

When available, document.referrer will give you the come-from URI as a string; if it's not available it'll be empty ("").

<script>
    if (document.referrer.indexOf('http://images.google.com/') === 0) {
        document.write('<script src="http://otherdomain.com/file1.js"><\/script>');
    } else {
        document.write('<script src="http://otherdomain.com/file2.js"><\/script>');
    }
</script>

answered May 11, 2012 at 14:29

Matt

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4 Comments

ThiefMaster Over a year ago

And now we look at the syntax highlighting and fix the quote issue. :)

Matt Over a year ago

@ThiefMaster: Indeed we do ;)

antyrat Over a year ago

It will be good to check if document.referer exists too, because it can be undefined

Matt Over a year ago

@antyrat: In what browser/ situation? All the docs say it'll be an empty string?

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