RequestID

To keep track of the “requests” an existing “request ID” header can be used, if the header name for example is X-Appengine-Request-Log-Id therefore to continue using it, the router needs to know the name, example:

router := violetear.New()
router.RequestID = "X-Appengine-Request-Log-Id"

If the proxy is using another name, for example RID then use something like:

router := violetear.New()
router.RequestID = "RID"

If router.RequestID is not set, no “request ID” is going to be added to the headers. This can be extended using a middleware same has the logger check the AppEngine example.