#17 add dockerfile for api

api/src/middleware/cors.go

@@ -0,0 +1,28 @@
+package middleware
+
+import (
+	"log"
+	"net/http"
+	"os"
+)
+
+func EnableCors(next http.Handler) http.Handler {
+	var frontent_url = os.Getenv("FRONTEND_URL")
+	if frontent_url == "" {
+		log.Fatal("FRONTEND_URL is not set")
+	}
+	log.Println("FRONTEND_URL is", frontent_url)
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", frontent_url)
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE")
+		w.Header().Set("Access-Control-Allow-Headers", "Authorization")
+
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}