Add function to write json to http response writer

api/api.go

@@ -1,7 +1,9 @@
 package api
 
 import (
+	"encoding/json"
 	"github.com/gorilla/mux"
+	"log"
 	"net/http"
 )
 
@@ -18,3 +20,17 @@ func NewRouter() *mux.Router {
 
 	return v1
 }
+
+func writeJson(writer http.ResponseWriter, content interface{}) {
+	writer.Header().Set("Content-Type", "application/json")
+	response, err := json.Marshal(content)
+	if err != nil {
+		log.Printf("JSON marshal error: %v\n", err)
+		http.Error(writer, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if _, err := writer.Write(response); err != nil {
+		log.Printf("Error writing JSON to response: %v\n", err)
+		http.Error(writer, err.Error(), http.StatusInternalServerError)
+	}
+}

api/health.go

@@ -1,23 +1,15 @@
 package api
 
 import (
-	"encoding/json"
-	"log"
 	"net/http"
 )
 
 // Health tries to respond that the server is alive.
 // If it is not, the response won't reach the client.
-func Health(w http.ResponseWriter, r *http.Request) {
+func Health(writer http.ResponseWriter, _ *http.Request) {
-	w.WriteHeader(http.StatusOK)
+	writer.WriteHeader(http.StatusOK)
-	w.Header().Set("Content-Type", "application/json")
+	writeJson(
-	response, err := json.Marshal(Message{"I'm alive!"})
+		writer,
-	if err != nil {
+		Message{"I'm alive!"},
-		log.Printf("JSON marshal error in health route: %v\n", err)
+	)
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-	}
-	if _, err := w.Write(response); err != nil {
-		log.Printf("Error handling the health route: %v\n", err)
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-	}
 }