Nginx中IF、AND、OR语句用法实例
在上一篇文章:《Nginx if语句加正则表达式实现字符串截断》中, 我们介绍过了使用if来进行截断字符串的用法, 这次我们来了解下if的逻辑用法:
什么是逻辑用法呢, 就程序中的and、or关系, 就叫做逻辑了.
NGINX支持if的 and 与 or 或者 && 与 || 吗?
答案是No.
当你尝试这样配置, 重载nginx时, nginx会报出错误
代码如下:
location = /test/ { default_type text/html; set $b 0; if ( $remote_addr != '' && $http_x_forwarded_for != '' ){ set $b '1'; } echo $b; } [root@test-vm ~]# /usr/local/nginx/sbin/nginx -t nginx: [emerg] invalid condition "$remote_addr" in /usr/local/nginx/conf/nginx.conf:60 configuration file /usr/local/nginx/conf/nginx.conf test failed
那么我们应该怎样来实现and 和or的逻辑关系呢?
代码如下:
location = /test_and/ { default_type text/html; set $a 0; set $b 0; if ( $remote_addr != '' ){ set $a 1; } if ( $http_x_forwarded_for != '' ){ set $a 1$a; } if ( $a = 11 ){ set $b 1; } echo $b; } location = /test_or/ { default_type text/html; set $a 0; set $b 0; if ( $remote_addr != '' ){ set $a 1; } if ( $http_x_forwarded_for != '' ){ set $a 1; } if ( $a = 1 ){ set $b 1; } echo $b; }
相关推荐
nginxs 2020-11-14
Guanjs0 2020-11-13
小木兮子 2020-11-11
yserver 2020-11-11
ssihc0 2020-11-11
windle 2020-11-10
HanksWang 2020-11-10
liuchen0 2020-11-10
Freshairx 2020-11-10
ccschan 2020-11-10
liwf 2020-11-10
Guanjs0 2020-11-09
AderStep 2020-11-09
zrtlin 2020-11-09
mqfcu 2020-11-10
windle 2020-10-29