nginx根据user-agent手机端跳转，nginx rewrite详见：http://seanlook.com/2015/05/17/nginx-location-rewrite/

nginx手机端跳转配置.conf

location = / {

    if ($http_user_agent ~* "(Android|iPhone|iPod|Symbian|BlackBerry|Windows Phone|Mobile|J2ME)") {
        rewrite ^ http://m.uxin.com permanent;
    }
    
    #htpasswd密码生成可用在线工具http://tool.oschina.net/htpasswd，加密方式选Crypt
    auth_basic_user_file  /data/soft/nginx/conf/htpasswd;
    auth_basic            "please input passwd, or contact YANGL";

    proxy_pass  http://newwww;
    proxy_http_version 1.1;
    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Scheme $scheme;
    proxy_set_header Remote-Addr $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}