Nginx - 一招快速解决跨域（CORS）问题

跨域场景

1. 在访问的地址链路里面又有一个新的地址发起访问
2. 连续两次经过跨域配置也会报跨域错误

# 允许跨域请求的域，*代表所有
add_header 'Access-Control-Allow-Origin' *;

# 允许带上cookie请求
add_header 'Access-Control-Allow-Credentials' 'true';

# 允许请求的方法，比如 GET/POST/PUT/DELETE
add_header 'Access-Control-Allow-Methods' *;

# 允许请求的header
add_header 'Access-Control-Allow-Headers' *;

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;

    upstream api {
       server XXX.XXX.XXX.XXX:18080;
       server XXX.XXX.XXX.XXX:18081;
    }

    server {

        #允许跨域请求的域，*代表所有
        #add_header 'Access-Control-Allow-Origin' *;

        #允许带上cookie请求
        #add_header 'Access-Control-Allow-Credentials' 'true';

        #允许请求的方法，比如 GET/POST/PUT/DELETE
        #add_header 'Access-Control-Allow-Methods' *;

        #允许请求的header
        #add_header 'Access-Control-Allow-Headers' *;

        listen       80;
        server_name  127.0.0.1;

        location /index {
           alias  /usr/share/nginx/html;
           index index.html index.htm;
        }

        location / {
          proxy_pass http://api;
        }

        #location /PJO3eZpW2z.txt {
         #alias /usr/share/nginx/html/PJO3eZpW2z.txt;
        #}

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}