Merge pull request #273 from srcenchen/api_cors

[opt] HTTP-API: 支持跨域

pkg/logic/http_api.go

@@ -253,6 +253,7 @@ func (h *HttpApiServer) notFoundHandler(w http.ResponseWriter, req *http.Request
 func feedback(v interface{}, w http.ResponseWriter) {
 	resp, _ := json.Marshal(v)
 	w.Header().Add("Server", base.LalHttpApiServer)
+	w.Header().Set("Access-Control-Allow-Origin", "*") // 跨域
 	w.Header().Set("Content-Type", "application/json")
 	_, _ = w.Write(resp)
 }