Enable CORS

downloader/main.go

@@ -21,28 +21,49 @@ func init() {
 
 const DOWNLOAD_WORKERS = 10
 
+var downloadQueue = make(chan *DownloadTask, 100)
+
+func enableCORS(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+
+		if r.Method == http.MethodOptions {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+func handleDownload(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req DownloadRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		log.Printf("Error parsing JSON: %v", err)
+		http.Error(w, "Error parsing JSON", http.StatusBadRequest)
+		return
+	}
+
+	downloadQueue <- &DownloadTask{Url: req.Link}
+	w.WriteHeader(http.StatusOK)
+}
+
 func main() {
-	downloadQueue := make(chan *DownloadTask, 100)
 	for i := 0; i < DOWNLOAD_WORKERS; i++ {
 		worker := &DownloadWorker{id: i, input: downloadQueue}
 		go worker.Run()
 	}
 
-	http.HandleFunc("/download", func(responseWriter http.ResponseWriter, request *http.Request) {
-		defer request.Body.Close()
-
-		req := DownloadRequest{}
-		err := json.NewDecoder(request.Body).Decode(&req)
-		if err != nil {
-			log.Printf("Error parsing JSON: %v", err)
-			http.Error(responseWriter, "Error parsing JSON", http.StatusBadRequest)
-			return
-		}
-
-		downloadQueue <- &DownloadTask{Url: req.Link}
-	})
+	mux := http.NewServeMux()
+	mux.Handle("/download", enableCORS(http.HandlerFunc(handleDownload)))
 	log.Println("Server starting on :5000")
-	err := http.ListenAndServe(":5000", nil)
+	err := http.ListenAndServe(":5000", mux)
 	if err != nil {
 		log.Println("Error starting server:", err)
 	}