nginx 跨域 配置

# 跨域配置
  location /api/ {

    # 添加跨域头
    add_header 'Access-Control-Allow-Origin' '*' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE' always;
    add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, X-Requested-With' always;
    add_header 'Access-Control-Allow-Credentials' 'true' always;

    # 这段可以不配置  # 如果是预检请求 (OPTIONS)，直接返回成功
    # if ($request_method = 'OPTIONS') {
    #   add_header 'Access-Control-Allow-Origin' '*' always;
    #   add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE';
    #   add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, X-Requested-With';
    #   add_header 'Access-Control-Max-Age' 1800;
    #   add_header 'Content-Length' 0;
    #   add_header 'Content-Type' 'text/plain';
    #   return 204;
    # }

    # 反向代理到后端服务
    proxy_pass http://1.1.1.1:8080/xxx/; # 替换为后端服务地址

    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }