nginx 解决跨域问题

本地用 8080 端口启动的服务访问后台API有跨域问题，

from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.

其实用 9021 端口后台就会放行，故用 nginx 解决

    server {listen       8080;server_name  localhost;location /file/upload {proxy_pass http://后台IP地址/file/upload; # 后端地址和端口proxy_set_header Host "localhost:9021";proxy_set_header Referer "http://localhost:9021";proxy_set_header Connection "keep-alive";proxy_set_header Cookie $http_cookie;}}

我的项目后端主要是根据 Referer 判断跨域，所以可以访问了。需要设置其它 header，自己手动设置