Redirect POST request and keep data. Possible?

Question

My problem is simple. I need to upload a file directly to the correct server (which has currently low workload).

Therefore I do:

Answer 1

If you really want to load balance through the code while potentially caching the page with the upload form, first select the default download server (url); then, onSubmit call the server and find the best upload target and adjust the action attribute accordingly.

With this method, users who do not activate JS still get what they want, users with JS enabled get the better upload target, and you can still cache. Additionally, the timing of the cache request could potentially be more opportunistic, since the URL request will occur very shortly before the actual upload.

The only hitch will be the call to get the URL, which you can more easily performance tune (I imagine) than the process you are describing above. Uploading a file twice through a header directive and/or cURL call don't seem like a good tradeoff for caching a single html file, IMO. But I don't know what you're up against, either.

If you don't want to heavily administer the server environment and introduce load balancing, this is the option I would suggest.

Note, also, I am not a server administrator by trade.