feat: add cors middleware

cmd/server/main.go

@@ -7,6 +7,7 @@ import (
 	_ "gitea.gabilandia.com/gabdlr/agenda-web-go/docs"
 	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/database"
 	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/handler"
+	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/middleware"
 	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/repository"
 	httpSwagger "github.com/swaggo/http-swagger"
 )
@@ -17,12 +18,12 @@ import (
 // @termsOfService http://swagger.io/terms/
 
 // @contact.name API Support
-// @contact.email support@yourapp.com
+// @contact.email gabriel.delosrios@tutamail.com
 
 // @license.name MIT
 // @license.url https://opensource.org/licenses/MIT
 
-// @host localhost:8080
+// @host agenda-web-go.gabilandia.com
 // @BasePath /
 func main() {
 	err := database.InitDB()
@@ -36,5 +37,5 @@ func main() {
 	handler.HandleContacts(mux, contactRepo)
 	handler.HandlHealthChecks(mux)
 	mux.HandleFunc("/swagger/", httpSwagger.WrapHandler)
-	log.Fatal(http.ListenAndServe(":8080", mux))
+	log.Fatal(http.ListenAndServe(":8080", middleware.CorsMiddleware(mux)))
 }

internal/middleware/cors.go

@@ -0,0 +1,19 @@
+package middleware
+
+import (
+	"net/http"
+	"os"
+)
+
+func CorsMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", os.Getenv("ALLOWED_ORIGIN"))
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}