Initial commit

app_info.go

@@ -0,0 +1,19 @@
+package middleware
+
+import (
+	"net/http"
+)
+
+// AppInfo adds application name and version headers to the response
+func AppInfo(name string, version string) func(http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("App-Name", name)
+			w.Header().Set("App-Version", version)
+
+			h.ServeHTTP(w, r)
+		}
+
+		return http.HandlerFunc(fn)
+	}
+}

go.mod

@@ -0,0 +1,3 @@
+module go.pkg.cx/middleware
+
+go 1.15

ping.go

@@ -0,0 +1,23 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+)
+
+// Ping responses with pong to /ping request and stops chain
+func Ping(next http.Handler) http.Handler {
+	fn := func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == "GET" && strings.HasSuffix(strings.ToLower(r.URL.Path), "/ping") {
+			w.Header().Set("Content-Type", "text/plain")
+			w.WriteHeader(http.StatusOK)
+			w.Write([]byte("pong")) // nolint:errcheck
+
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	}
+
+	return http.HandlerFunc(fn)
+}