老师我看了之后,我上传jpg的图片为什么会出现跨域的问题
Access to XMLHttpRequest at 'http://apis.imooc.com/api/upload?icode=9939AD856746753E' from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.