Nginx自动跳转到手机端

server {
        listen 80;
        server_name baidu.com;
        if ( $http_user_agent ~ "(MIDP)|(WAP)|(UP.Browser)|(Smartphone)|(Obigo)|(Mobile)|(AU.Browser)|(wxd.Mms)|(WxdB.Browser)|(CLDC)|
        (UP.Link)|(KM.Browser)|(UCWEB)|(SEMC-Browser)|(Mini)|(Symbian)|(Palm)|(Nokia)|(Panasonic)|(MOT-)|(SonyEricsson)|(NEC-)|(Alcatel)
        |(Ericsson)|(BENQ)|(BenQ)|(Amoisonic)|(Amoi-)|(Capitel)|(PHILIPS)|(SAMSUNG)|(Lenovo)|(Mitsu)|(Motorola)|(SHARP)|(WAPPER)|(LG-)|
        (LG/)|(EG900)|(CECT)|(Compal)|(kejian)|(Bird)|(BIRD)|(G900/V1.0)|(Arima)|(CTL)|(TDG)|(Daxian)|(DAXIAN)|(DBTEL)|(Eastcom)|(EASTCOM)|
        (PANTECH)|(Dopod)|(Haier)|(HAIER)|(KONKA)|(KEJIAN)|(LENOVO)|(Soutec)|(SOUTEC)|(SAGEM)|(SEC-)|(SED-)|(EMOL-)|(INNO55)|(ZTE)|
        (iPhone)|(Android)|(Windows CE)|(Wget)|(Java)|(curl)|(Opera)" )
        {
            rewrite ^/(.*)$ http://m.baidu.com/$1 permanent;               
        }
        location / {
            proxy_pass http://www.baidu.com/;
        }
    }