ng2-file-upload访问控制源问题 [英] ng2-file-upload access-control origin issue

问题描述

我已将此库用于angular2文件上传 https://github.com/valor -software/ng2-file-upload

I have used this library for angular2 file upload https://github.com/valor-software/ng2-file-upload

现在上传文件时出现此错误

Now I'm getting this error when I upload a file

XMLHttpRequest无法加载 http://localhost:8080/files .对预检请求的响应未通过访问控制检查:当请求的凭据模式为包括"时，响应中"Access-Control-Allow-Origin"标头的值不得为通配符"*".因此，不允许访问来源' http://localhost:3000 . XMLHttpRequest发起的请求的凭据模式由withCredentials属性控制.

XMLHttpRequest cannot load http://localhost:8080/files. Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://localhost:3000' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

推荐答案

在上传项目之前，先创建withCredentials = false.您可以将此代码放在ngOnInit/constructor或ngOnChanges中.

Make withCredentials = false before uploading the item. You can put this code in ngOnInit/ constructor or ngOnChanges.

this.uploader.onBeforeUploadItem = (item) => {
  item.withCredentials = false;
}

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