FeatureReqeust: Pass the control back to the express server upon success

[neon-vortex]

When express-http-proxy is used as a middleware and we would like to know certain metrics such as timeTakenForResponse, we would need to be able to pass control back to the express server.

• Traditionally this is done by calling 'next()' to return control.

[mx781]

It does seem you can do this by changing skipToNextHandlerFilter to return true, but it seems to me that the proxy reponse is no longer available at that point. @monkpow what is the intention in this case - what might be worth a PR?

Edit: My bad, it seems we are able to do this. @siva-vadivel , have a look at userResDecorator - that gets executed right before sending so should suit your use case as well?

[neon-vortex]

userResDecorator is executed right before sending the response to the user, however we would like to pass control bask to express after sending the response. One suggestion would be to call the express's next() method inside userResDecorator, but once next() is called, we would not be able to know when the response was completed (especially in the case of streaming responses)

[monkpow]

Ok, @siva-vadivel and @mx781, thanks for raising the issue, and the discussion.

See commit above; I fixed the skipToNextHandler, and added the expressHttpProxy res and req to the user.res so you can read the proxy res and req values.