func NewRequestMiddleare() synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
next.ServeHTTPC(c, &statusResponseWriter{w, http.StatusOK}, r)
})
}
}
func newReport() synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
c = context.WithValue(c, "report", map[string]interface{}{})
next.ServeHTTPC(c, w, r)
})
}
}
func AuthMiddleware() synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
// Some auth logic here
c = context.WithValue(c, CtxRequestUser, "John Doe")
next.ServeHTTPC(c, w, r)
})
}
}
func TracingMiddleware(getTraceID NewTraceID) synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
traceID := getTraceID()
w.Header().Set(HeaderTraceID, fmt.Sprintf("%d", traceID))
c = context.WithValue(c, CtxRequestTraceID, traceID)
next.ServeHTTPC(c, w, r)
})
}
}
func defaultReport() synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
report := c.Value("report").(map[string]interface{})
report["name"] = "Special Analysis"
report["date"] = time.Now()
report["author"] = c.Value(CtxRequestUser).(string)
c = context.WithValue(c, "report", report)
next.ServeHTTPC(c, w, r)
})
}
}
func LoggingMiddleware(logs io.Writer) synapse.Constructor {
return func(next synapse.Handler) synapse.Handler {
return synapse.HandlerFunc(func(c context.Context, w http.ResponseWriter, r *http.Request) {
logger := log.New(logs, "", log.LstdFlags)
defer func(begin time.Time) {
cw := w.(*statusResponseWriter)
traceID := c.Value(CtxRequestTraceID)
logger.Printf("method=%s route=%s trace_id=%d status=%d took=%s\n", r.Method, r.RequestURI, traceID, cw.Status, time.Now().Sub(begin))
}(time.Now())
next.ServeHTTPC(c, w, r)
})
}
}