直接上nginx配置：
location /api/ { proxy_set_header Access-Control-Allow-Origin *; proxy_set_header Access-Control-Allow-Methods 'GET, POST, OPTIONS'; proxy_set_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization'; if ($request_method = 'OPTIONS') { add_header Access-Control-Allow-Origin *; add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS'; add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization'; return 204; } proxy_pass http://127.0.0.1:8001/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 500m; client_body_buffer_size 512k; proxy_connect_timeout 30; proxy_send_timeout 3000; proxy_read_timeout 3000; proxy_buffer_size 8k; proxy_buffers 8 128k; proxy_busy_buffers_size 256k; proxy_temp_file_write_size 256k; } 网上部分文章将proxy_set_header写成了add_header会导致允许跨域配置不生效，注意proxy_set_header和add_header区别： proxy_set_header是nginx在收到浏览器发来的请求基础上，添加请求头给到目标服务，add_header是nginx设置响应头信息给浏览器； 标签：Control,set,跨域,预检,Access,header,add,proxy,请求 From： https://www.cnblogs.com/zheng-hong-bo/p/16911320.html