javascript - is it possible to set custom headers on js <script> requests? - Stack Overflow

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Is something like this possible?

<script src=".js" my-custom-header="foo"></script>

Update (a bit more detail):

I've been asked if there was a way to municate some parameters to the server as part of the script request using headers instead of GET params. I said, "no," but thought I'd double check.

Is something like this possible?

<script src="http://myserver./some.js" my-custom-header="foo"></script>

Update (a bit more detail):

I've been asked if there was a way to municate some parameters to the server as part of the script request using headers instead of GET params. I said, "no," but thought I'd double check.

• javascript
• http-headers

Share Improve this question Follow edited Feb 1, 2011 at 19:00 sprugman asked Feb 1, 2011 at 18:54 sprugmansprugman 19.8k3636 gold badges115115 silver badges164164 bronze badges 3

• Which header(s) did you want to have set? – Cameron Commented Feb 1, 2011 at 18:59
• Why can't you use GET params? – Cameron Commented Feb 1, 2011 at 19:02
• The worry is about running out of room in the url space. And also having to parse them out, I guess. (I gather we have a custom parser, so it's not as simple as $_GET['myParam'].) – sprugman Commented Feb 1, 2011 at 19:04

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2 Answers 2

Sorted by: Reset to default 6

Short answer: no. By default a script tag will just retrieve the resource specified in the src attribute.

However, if you use an AJAX request to retrieve the script (and add it later/execute it), you can use the setRequestHeader function of the XMLHttpRequest object (see http://www.developertutorials./learn-ajax/custom-http-headers-2643.php).

You could also use more plex methods, such as using mod_rewrite to rewrite paths, and include the parameters in the url. The best solution depends on what you want to do, and how much control you have over the server.

No. You'll need to set the headers on the server that's serving up the JS file.

EDIT: I misinterpreted what you meant, it turns out you wanted to set a request header, not a response header. This is still not possible (from HTML) as far as I know.

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