Add CORS

Author: Vic Shóstak

.dockerignore

@@ -10,6 +10,5 @@ LICENSE
 # Folders
 .git/
 .github/
-.task/
-app/
+build/
 **/*_test.go

Makefile

@@ -32,7 +32,11 @@ migrate.force:
 docker.build:
 	docker build -t net_http-go-template .
 
-docker.run: docker.net_http docker.postgres
+docker.network:
+	docker network inspect dev-network >/dev/null 2>&1 || \
+	docker network create -d bridge dev-network
+
+docker.run: docker.network docker.net_http docker.postgres
 
 docker.stop:
 	docker stop dev-net_http dev-postgres

app/controllers/user_controller.go

@@ -71,8 +71,9 @@ func GetUsers(w http.ResponseWriter, r *http.Request) {
 // @Success 200 {object} models.User
 // @Router /api/public/user/{id} [get]
 func GetUser(w http.ResponseWriter, r *http.Request) {
-	// Define content type.
+	// Define content type and CORS.
 	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
 
 	// Catch user ID from URL.
 	id, err := uuid.Parse(r.URL.Query().Get("id"))
@@ -130,8 +131,9 @@ func GetUser(w http.ResponseWriter, r *http.Request) {
 // @Success 200 {object} models.User
 // @Router /api/private/user [post]
 func CreateUser(w http.ResponseWriter, r *http.Request) {
-	// Define content type.
+	// Define content type and CORS.
 	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
 
 	// Get now time.
 	now := time.Now().Unix()
@@ -235,8 +237,9 @@ func CreateUser(w http.ResponseWriter, r *http.Request) {
 // @Success 200 {object} models.User
 // @Router /api/private/user [patch]
 func UpdateUser(w http.ResponseWriter, r *http.Request) {
-	// Define content type.
+	// Define content type and CORS.
 	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
 
 	// Get now time.
 	now := time.Now().Unix()
@@ -347,8 +350,9 @@ func UpdateUser(w http.ResponseWriter, r *http.Request) {
 // @Success 200 {string} string "ok"
 // @Router /api/private/user [delete]
 func DeleteUser(w http.ResponseWriter, r *http.Request) {
-	// Define content type.
+	// Define content type and CORS.
 	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
 
 	// Get now time.
 	now := time.Now().Unix()

main.go

@@ -31,7 +31,10 @@ func main() {
 	routes.PrivateRoutes(router)
 	routes.SwaggerRoutes(router)
 
-	// Register API routes.
+	// Register middleware.
+	router.Use(mux.CORSMethodMiddleware(router)) // enable CORS
+
+	// Initialize server.
 	server := configs.ServerConfig(router)
 
 	// Start API server.

pkg/routes/private_routes.go

@@ -20,11 +20,11 @@ func PrivateRoutes(router *mux.Router) {
 	deleteUser := jwtProtected.Handler(http.HandlerFunc(controllers.DeleteUser))
 
 	// Routes for POST method:
-	router.Handle("/api/private/user", createUser).Methods("POST") // create user by ID
+	router.Handle("/api/private/user", createUser).Methods(http.MethodPost) // create user by ID
 
 	// Routes for PATCH method:
-	router.Handle("/api/private/user", updateUser).Methods("PATCH") // update user by ID
+	router.Handle("/api/private/user", updateUser).Methods(http.MethodPatch) // update user by ID
 
 	// Routes for DELETE method:
-	router.Handle("/api/private/user", deleteUser).Methods("DELETE") // delete user by ID
+	router.Handle("/api/private/user", deleteUser).Methods(http.MethodDelete) // delete user by ID
 }

pkg/routes/public_routes.go

@@ -1,13 +1,15 @@
 package routes
 
 import (
+	"net/http"
+
 	"github.com/create-go-app/net_http-go-template/app/controllers"
 	"github.com/gorilla/mux"
 )
 
 // PublicRoutes func for describe group of public routes.
 func PublicRoutes(router *mux.Router) {
 	// Routes for GET method:
-	router.HandleFunc("/api/public/user/{id}", controllers.GetUser).Methods("GET") // get one user by ID
-	router.HandleFunc("/api/public/users", controllers.GetUsers).Methods("GET")    // Get list of all users
+	router.HandleFunc("/api/public/user/{id}", controllers.GetUser).Methods(http.MethodGet) // get one user by ID
+	router.HandleFunc("/api/public/users", controllers.GetUsers).Methods(http.MethodGet)    // Get list of all users
 }

pkg/routes/swagger_routes.go

@@ -1,6 +1,7 @@
 package routes
 
 import (
+	"net/http"
 	"os"
 
 	"github.com/gorilla/mux"
@@ -19,5 +20,5 @@ func SwaggerRoutes(router *mux.Router) {
 	)
 
 	// Routes for GET method:
-	router.PathPrefix("/swagger/").Handler(getSwagger).Methods("GET") // get one user by ID
+	router.PathPrefix("/swagger/").Handler(getSwagger).Methods(http.MethodGet) // get one user by ID
 }