DRY some code, add helper function handleHTTPAs

server.go

@@ -88,6 +88,12 @@ func (s *Server) getResponseType(req *http.Request) responseFormat {
 	return unknownResponse
 }
 
+func (s *Server) handleHTTPAs(responseType responseFormat) func(http.ResponseWriter, *http.Request) {
+	return func(resp http.ResponseWriter, req *http.Request) {
+		s.handleHTTP(resp, req, responseType)
+	}
+}
+
 func (s *Server) sendResponse(resp http.ResponseWriter, ip *IP, responseType responseFormat) {
 	s.logger.Printf("Request from %s %s\n", ip.version, ip)
 

what-is-my-ip.go

@@ -76,17 +76,9 @@ func getHandler(headers []string) (http.Handler, *Server) {
 
 	router := pat.New()
 
-	router.Get("/json", func(resp http.ResponseWriter, req *http.Request) {
-		service.handleHTTP(resp, req, jsonResponse)
-	})
-
-	router.Get("/text", func(resp http.ResponseWriter, req *http.Request) {
-		service.handleHTTP(resp, req, textResponse)
-	})
-
-	router.Get("/html", func(resp http.ResponseWriter, req *http.Request) {
-		service.handleHTTP(resp, req, htmlResponse)
-	})
+	router.Get("/html", service.handleHTTPAs(htmlResponse))
+	router.Get("/json", service.handleHTTPAs(jsonResponse))
+	router.Get("/text", service.handleHTTPAs(textResponse))
 
 	router.Get("/", func(resp http.ResponseWriter, req *http.Request) {
 		if req.URL.Path == "/" {