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We are building a REST service that will take about 5 minutes to execute. It will be only called a few times a day by an internal app. Is there an issue using a REST (ie: HTTP) request that takes 5 minutes to complete?
Do we have to worry about timeouts? Should we be starting the request in a separate thread on the server and have the client poll for the status?
Assuming that you can configure HTTP timeouts using whatever framework you choose, then you could request via a GET and just hang for 5 mins.
However it may be more flexible to initiate an execution via a POST, get a receipt (a number/id whatever), and then perform a GET using that 5 mins later (and perhaps retry given that your procedure won’t take exactly 5 mins every time). If the request is still ongoing then return an appropriate HTTP error code (404 perhaps, but what would you return for a GET with a non-existant receipt?), or return the results if available.