Disable Caching For A Single JS File Using Web.config

Question

I currently cache everything possible on my site (images, JS, CSS). There is only one JS file that I need to be loaded fresh every single time. How do I omit just one file from caching, using web.config, whilst leaving everything else cached?

Note that I tried another link here, and it didn't seem to stop the caching of my file: How do I disable caching of an individual file in IIS 7 using weserver config settings

score 6 · Answer 1 · answered Mar 05 '13 at 16:49

6

How about:

<configuration>
  <location path="path/to/the/file.js">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlMode="DisableCache" />
      </staticContent>
    </system.webServer>
  </location>
</configuration>

(Note that the path is relative to the web.config file)

answered Mar 05 '13 at 16:49

gdt

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IE's cache is pretty annoying during development. I put the `DisableCache` in `Web.Debug.config` and it works fine. Thx! – Sebastian Weber Oct 08 '14 at 09:22
It definitely /can/ work - what caching headers are you seeing going across the network? – gdt Mar 13 '17 at 11:52
It can be added without '' tags, so it is applied to whole project – Maris B. Jun 20 '17 at 14:02

score 2 · Answer 2 · answered Mar 08 '11 at 17:04

I don't think you can do it using web.config, but you could add a unique querystring parameter to the javascript url in order for it to be loaded every time:

If you are using ASP.NET

<script src="mycode.js?<%=System.Guid.NewGuid.ToString()%>"></script>

score 1 · Answer 3 · edited May 23 '17 at 12:14

1

Set the path for it not as a static URL but get an ASPX page to serve the script. Inside your ASPX page just send back the text:

byte[] javascriptTextBuffer = GetMyJavascript();
Response.ContentType = "text/javascript";
Response.Write(javascriptTextBuffer);

Inside the page turn off caching.

Having said that, it seems to me that you are doing something wrong that have to load the JavaScript file everytime. Make scripts static but use parameters to drive versatility.

edited May 23 '17 at 12:14

Community

1
1

answered Mar 08 '11 at 16:39

Aliostad

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I agree...if you need certain js data to be fesh everytime, it seems like you would be better served by having a a few dynamic elements defined in your page that your static scripts can use. – Matthew Nichols Mar 08 '11 at 16:43
Hmmmm... That will work, but is not ideal for many reasons. Hopefully a better solution exists :-). – Bob Wheeler Mar 08 '11 at 16:43
The reason that the JS isn't to be cached is that it's a plugin that goes onto a customer website. I would obviously like to be able to update that plugin and have it run the latest 'stuff' on that customer website. – Bob Wheeler Mar 08 '11 at 16:44
1

So you are explicitly making customer's site less performant for your convinience? Unless you are creating virus I'd recommned to have cahing set to some time (i.e. a day is likley enough to reduce performance impact and provide reasonably lates version of your script). – Alexei Levenkov Mar 08 '11 at 17:23

Disable Caching For A Single JS File Using Web.config

3 Answers3