一、 Rewrite 跳转实现
服务协议功能模块
url 资源定位路径

  • nginx————支持url重写、支持if条件判断,但不支持else
  • 跳转————循环最多可以执行10次,超过后nginx将返回500代码错误
  • rewrite————使用nginx’全局变量或自己设置的变量,结合正则表达式和标志位实现url重写以及重定向
    Nginx rewrite 重写功能和Nginx的正则表达式_第1张图片
    二、Rewrite 使用场景
  • 使用rewrite进行匹配跳转
  • 使用if匹配全局变量后跳转
  • 使用location匹配再跳转
    1.rewrite放在 server{},if{},location{}段中
    2.对域名或参数字符串:使用if全局变量匹配、使用proxy_pass反向代理
    三、nginx正则表达式
    常用的正则表达式元字符
    Nginx rewrite 重写功能和Nginx的正则表达式_第2张图片
    四、Rewrite 命令
    Nginx rewrite 重写功能和Nginx的正则表达式_第3张图片
    location分类
    Nginx rewrite 重写功能和Nginx的正则表达式_第4张图片
    正则匹配的常用表达式
    Nginx rewrite 重写功能和Nginx的正则表达式_第5张图片
    五、location优先级
    按优先级排列:
  • = 类型
  • ^~ 类型表达式
  • 正则表达式(和)类型
  • 常规字符串匹配类型,按前缀匹配
  • 通用匹配(/),如果没有其他匹配,任何请求都会匹配到
    location优先级规则(从高到低排列)
    1.匹配某个具体的文件
  • location = 完整路径
  • location ^~ 完整路径
  • location ~* 完整路径
  • location ~ 完整路径
  • location 完整路径
  • location /
    2.用目录做匹配访问某个文件
  • location = 目录
  • location ^~ 目录
  • location ~ 目录
  • location ~* 目录
  • location 目录
  • location /
    六、应用场景测试
    公司旧域名 www.domain.com 因业务需求有变更,需要使用新域名 www.newdomain.com 代替,不能废除旧域名,从旧域名跳转到新域名,且保持其参数不变

    [root@localhost bin]# rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
    获取http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
    警告:/var/tmp/rpm-tmp.IHyTHc: 头V4 RSA/SHA1 Signature, 密钥 ID 7bd9bf62: NOKEY
    准备中...                          ################################# [100%]
    正在升级/安装...
    1:nginx-release-centos-7-0.el7.ngx ################################# [100%]
    [root@localhost bin]# yum install nginx -y 
    [root@localhost ~]# mkdir /abc
    [root@localhost ~]# mount.cifs //192.168.56.1 /mnt
    Password for root@//192.168.254.10/linuxs:  
    [root@localhost ~]# cd /abc/LNMP-C7/LNMP-C7/
    [root@localhost LNMP-C7]# ls
    Discuz_X3.4_SC_UTF8.zip
    mysql-boost-5.7.20.tar.gz
    ncurses-5.6.tar.gz
    nginx-1.12.2.tar.gz
    php-5.6.11.tar.bz2
    php-7.1.10.tar.bz2
    php-7.1.20.tar.bz2
    php-7.1.20.tar.gz
    zend-loader-php5.6-linux-x86_64_update1.tar.gz
    [root@localhost LNMP-C7]# tar -zxvf nginx-1.12.2.tar.gz -C /opt
    [root@localhost LNMP-C7]# useradd -M -s /sbin/nologin nginx
    [root@localhost LNMP-C7]# cd /opt/nginx-1.12.2/
    [root@localhost nginx-1.12.2]# ls
    auto     CHANGES.ru  configure  html     man     src
    CHANGES  conf        contrib    LICENSE  README
    [root@localhost nginx-1.12.2]# yum install gcc gcc-c++ pcre pcre-devel make zlib-devel -y
    [root@localhost nginx-1.12.2]#  ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_stub_status_module
    [root@localhost nginx-1.12.2]# make && make install
    [root@localhost conf]# vim nginx.conf
    37         server_name  www.accp.com;
    41         access_log  logs/www.accp.com/access.log  main;
    [root@localhost conf]# yum install bind -y
    [root@localhost conf]# vim /etc/named.conf 
    13         listen-on port 53 { any; };
    21         allow-query     { any; };
    [root@localhost conf]# vim /etc/named.rfc1912.zones 
    25 zone "accp.com" IN {
    26         type master;
    27         file "accp.com.zone";
    28         allow-update { none; };
    29 };
    [root@localhost conf]# cd /var/named/
    [root@localhost named]# ls
    data     named.ca     named.localhost  slaves
    dynamic  named.empty  named.loopback
    [root@localhost named]# cp -p named.localhost accp.com.zone
    [root@localhost named]# vim accp.com.zone 
    www     IN      A       192.168.247.202
    [root@localhost named]# systemctl start named
    [root@localhost named]# systemctl stop firewalld.service 
    [root@localhost named]# setenforce 0
    [root@localhost named]# ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin/
    [root@localhost named]# cd /usr/local/nginx/
    [root@localhost nginx]# ls
    conf  html  logs  sbin
    [root@localhost nginx]# cd logs/
    [root@localhost logs]# mkdir www.accp.com
    [root@localhost logs]# ls
    error.log  www.accp.com
    [root@localhost logs]# nginx 
    [root@localhost logs]# netstat -natp | grep 80
    tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      6

    打开win10客户机,配置dns服务器,并使用域名访问。
    Nginx rewrite 重写功能和Nginx的正则表达式_第6张图片
    Nginx rewrite 重写功能和Nginx的正则表达式_第7张图片

    [root@localhost logs]# vim /usr/local/nginx/conf/nginx.conf
    
        location / {
           #域名重定向
    ‘                 if ($host = 'www.accp.com') {
    ’                       rewrite ^/(.*)$ http://www.kgc.com/$1 permanent;
    ‘               }
                 root /html;
                 index index.html index.htm;
        }
    [root@localhost logs]# vim /etc/named.rfc1912.zones 
    zone "kgc.com" IN {
        type master;
        file "kgc.com.zone";
        allow-update { none; };
    };
    [root@localhost logs]# cd /var/named/
    [root@localhost named]# ls
    accp.com.zone  dynamic   named.empty      named.loopback
    data           named.ca  named.localhost  slaves
    [root@localhost named]# cp -p accp.com.zone kgc.com.zone
    [root@localhost named]# systemctl restart named
    [root@localhost named]# killall -1 nginx

    Nginx rewrite 重写功能和Nginx的正则表达式_第8张图片

    [root@localhost html]# vim /usr/local/nginx/conf/nginx.conf
    37         server_name  bbs.accp.com;
    42         location /post {
    43                 rewrite (.+) http://www.accp.com/bbs$1 permanent;
    44         }
    [root@localhost html]# cd -
    /var/named
    [root@localhost named]# vim accp.com.zone 
    [root@localhost named]# cat accp.com.zone 
    $TTL 1D
    @   IN SOA  @ rname.invalid. (
                    0   ; serial
                    1D  ; refresh
                    1H  ; retry
                    1W  ; expire
                    3H )    ; minimum
    NS  @
    A   127.0.0.1
    bbs IN  A   192.168.247.202
    [root@localhost named]# killall -3 nginx
    [root@localhost named]# nginx
    [root@localhost named]# systemctl restart named

    Nginx rewrite 重写功能和Nginx的正则表达式_第9张图片
    基于客户端IP访问跳转

    [root@localhost named]# vim /usr/local/nginx/conf/nginx.conf
    
    42 #设置是否合法的IP标志
    43         set $rewrite true;
    44 #判断是否为合法IP,是否是允许的IP
    45         if ($remote_addr = "192.168.247.139"){
    46                 set $rewrite false;
    47         }
    48 #不被允许的IP进行判断,打上标记
    49         if ($rewrite = true){
    50                 rewrite (.+) /maintenance.html;
    51         }
    52 #匹配标记进行跳转站点
    53         location = /maintenance.html {
    54                 root html;
    55         }
    [root@localhost named]# cd /usr/local/nginx/html/
    [root@localhost html]# ls
    50x.html  index.html
    [root@localhost html]# vim maintenance.html
    [root@localhost html]# killall -3 nginx 
    [root@localhost html]# nginx 

    Nginx rewrite 重写功能和Nginx的正则表达式_第10张图片
    Nginx rewrite 重写功能和Nginx的正则表达式_第11张图片
    基于参数匹配的跳转———跳转到首页
    Nginx rewrite 重写功能和Nginx的正则表达式_第12张图片

    [root@localhost named]# vim /usr/local/nginx/conf/nginx.conf
    37         server_name  www.accp.com;
    42         if ($request_uri ~ ^/100-(100|200)-(\d+).html$){
    43                 rewrite (.*) http://www.accp.com permanent;
    44         }
    [root@localhost named]# vim accp.com.zone 
    [root@localhost named]# cat accp.com.zone 
    $TTL 1D
    @   IN SOA  @ rname.invalid. (
                    0   ; serial
                    1D  ; refresh
                    1H  ; retry
                    1W  ; expire
                    3H )    ; minimum
    NS  @
    A   127.0.0.1
    www IN  A   192.168.247.202
    [root@localhost named]# systemctl restart named
    [root@localhost named]# killall -3 nginx
    [root@localhost named]# nginx

    Nginx rewrite 重写功能和Nginx的正则表达式_第13张图片
    Nginx rewrite 重写功能和Nginx的正则表达式_第14张图片
    基于目录下所有PHP文件跳转

    [root@localhost named]# vim /usr/local/nginx/conf/nginx.conf
    42         location ~* /upload/.*\.php$ {
    43                 rewrite (.+) http://www.accp.com permanent;
    44         }
    [root@localhost named]# nginx -t
    nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
    nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
    [root@localhost named]# killall -3 nginx
    [root@localhost named]# nginx

    Nginx rewrite 重写功能和Nginx的正则表达式_第15张图片
    Nginx rewrite 重写功能和Nginx的正则表达式_第16张图片
    基于最普通URL请求的跳转——跳转到首页

    [root@localhost named]# vim /usr/local/nginx/conf/nginx.conf
    42         location ~* ^/abc/123.html {
    43                 rewrite (.+) http://www.accp.com permanent;
    44         }

    Nginx rewrite 重写功能和Nginx的正则表达式_第17张图片
    Nginx rewrite 重写功能和Nginx的正则表达式_第18张图片
    基于最普通URL请求的跳转——跳转到首页

    [root@localhost named]# vim /usr/local/nginx/conf/nginx.conf
    42         location ~* ^/abc/123.html {
    43                 rewrite (.+) http://www.accp.com permanent;
    44         }
    [root@localhost named]# killall -3 nginx
    [root@localhost named]# nginx