url rewriting to redirect to correct javascript file version

Question

I recently read on Meta about some browser not flushing their cache even after reading a script url of this form

myscript.js?v=1234

so to go around the problem i am thinking about implementing a solution i also read but without any details given to it. something like myscript-1234.js and reroute to the actual correct file, but i have a doubt now. Should i rewrite that url to myscript.js or to myscript.js?v=1234 ? I am actually confused as to how it even going to make a difference to have a rewriting.

Pascal MARTIN · Accepted Answer · 2010-02-20 21:24:05Z

1

Your rewriting should not redirect to any other URL (which would the be fetched by the browser), but should be "internal" on your server.

What I mean is that when receiving a request for "myscript-1234.js", your server should instead serve the content of the myscript.js file ; which will always be the last version.

In the end :

For the client the is a different URL each time you update the file on the server : myscript-1234.js, myscript-1235.js, myscript-1236.js, ...
- This is why the browser will try to re-fetch the file from the server : as it's not the same name, it will not have the file in cache
But, for the server, there is always one and only one file : myscript.js
And you're using some "rewrite" rule so thr server just removes the -XYZ portion of the file name before trying to read it from disk.

answered Feb 20, 2010 at 21:24

Pascal MARTIN

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1 Comment

ak3nat0n Over a year ago

thank you for your help! it makes sense! i just finished implementing it!

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