通过nginx 解决跨域问题

跨域问题：后端是spring cloud的分布式服务，前端vue调用，部署测试环境，调用不同服务的时候，报错， 跨域请求被浏览器阻止

1，下载nginx的包
2，进入conf文件目录修改nginx.conf文件，改为如下格式。

worker_processes 1;

events {
    worker_connections 1024;
}

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

    # 定义 CORS 配置为一个变量，避免重复
    map $http_origin $cors_origin {
        default "*";
    }

    server {
        listen       端口;
        server_name  ip;
        
        # 统一的 CORS 配置
        add_header Access-Control-Allow-Origin "$cors_origin" always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization" always;
        add_header Access-Control-Allow-Credentials "true" always;
        add_header Access-Control-Max-Age 86400 always;
        
        # 处理 OPTIONS 请求
        if ($request_method = 'OPTIONS') {
            return 204;
        }
        
        # 优先处理接口请求
        location /开头/ {
            proxy_pass http://xxxxx-ip:端口/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            
            # 调试信息
            add_header X-Proxy-Path $request_uri always;
            add_header X-Proxy-Host $host always;
            
            # 详细日志
            access_log xxxxxx
        }
        
        # 处理静态资源
        location / {
            root xxx前端位置
        }
    }
}