CORS added

Author: mrsumanbiswas

server/main.go

@@ -15,6 +15,7 @@ func main() {
 	app := config.App
 
 	// middlewares
+	app.Use(middlewares.CorsHandler)
 	app.Use(middlewares.SimpleLogger)
 
 	// routes mapping using sub-groups

server/middlewares/cors.go

@@ -0,0 +1,20 @@
+package middlewares
+
+import "net/http"
+
+func CorsHandler(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Allows all origins for development; can be bound to specific domains via env later
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		w.Header().Set("Access-Control-Expose-Headers", "Content-Length")
+
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusNoContent)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}