fix: cancellation of requests with body #2
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The current implementation works well only for HTTP methods that do not support request body. For requests like POST, `req`'s 'close' event fires as soon as request body is read (see expressjs/express#6334 (comment)). I changed it to use `res`'s 'close', which works as expected. "finish" fires before "close", so I added `requestFinished` flag to avoid cancellation when the request is already processed.
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The current implementation works well only for HTTP methods that do not support request body. For requests like POST,
req's 'close' event fires as soon as request body is read (see expressjs/express#6334 (comment)). I changed it to useres's 'close', which works as expected. "finish" fires before "close", so I addedrequestFinishedflag to avoid cancellation when the request is already processed.