Add API to get a random domain

main.go

@@ -28,6 +28,7 @@ func main() {
 	http.HandleFunc("/images/", staticHandler.ServeHTTP)
 	http.HandleFunc("/api/rank.json", apiHandler)
 	http.HandleFunc("/api/multiple.json", multiHandler)
+	http.HandleFunc("/api/random.json", randomHandler)
 
 	err := http.ListenAndServe(listenAddress+":"+strconv.Itoa(listenPort), nil)
 	if err != nil {

randomHandler.go

@@ -0,0 +1,27 @@
+package main
+
+import "net/http"
+
+type RandomResponse struct {
+	Success bool   `json:"success"`
+	Message string `json:"message"`
+	Domain  string `json:"domain"`
+	Notice  string `json:"notice"`
+}
+
+func randomHandler(w http.ResponseWriter, r *http.Request) {
+
+	retVal := RandomResponse{}
+	retVal.Notice = "Free for light, non-commericial use. For heavy or commercial use, please contact us."
+
+	// pick a random key from the rankings map: since go tries to be non-deterministic, we'll just pick the first one
+	for k := range rankings {
+		retVal.Domain = k
+		break
+	}
+
+	retVal.Success = true
+	retVal.Message = "OK"
+
+	handleJson(w, r, retVal)
+}