(已被CORS策略阻塞:请求的资源上不存在'Access-Control-Allow-Origin'头文件)
在后端配置中
CORS_ORIGIN_WHITELIST
添加浏览器中提示错的from orgin 后面的地址
前端出现has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource
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