// RecoverPanics wraps an http Handler to recover and log panics.
func RecoverPanics(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
defer func() {
if x := recover(); x != nil {
http.Error(w, "apis panic. Look in log for details.", http.StatusInternalServerError)
glog.Errorf("APIServer panic'd on %v %v: %v\n%s\n", req.Method, req.RequestURI, x, debug.Stack())
}
}()
defer httplog.NewLogged(req, &w).StacktraceWhen(
httplog.StatusIsNot(
http.StatusOK,
http.StatusCreated,
http.StatusAccepted,
http.StatusBadRequest,
http.StatusMovedPermanently,
http.StatusTemporaryRedirect,
http.StatusConflict,
http.StatusNotFound,
http.StatusUnauthorized,
http.StatusForbidden,
errors.StatusUnprocessableEntity,
http.StatusSwitchingProtocols,
),
).Log()
// Dispatch to the internal handler
handler.ServeHTTP(w, req)
})
}
func tooManyRequests(req *http.Request, w http.ResponseWriter) {
// "Too Many Requests" response is returned before logger is setup for the request.
// So we need to explicitly log it here.
defer httplog.NewLogged(req, &w).Log()
// Return a 429 status indicating "Too Many Requests"
w.Header().Set("Retry-After", RetryAfter)
http.Error(w, "Too many requests, please try again later.", errors.StatusTooManyRequests)
}