proxy_pass反向代理配置中url后面加不加/的说明

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1 环境

OS:centos7

nginx _proxy服务器：192.168.1.23

web服务器：192.168.1.5

2 情况说明

2.1 path路径后面加”/”

2.1.1 情况一

NGINX配置

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
 
location  /proxy/ {
          proxy_pass http://192.168.1.5:8090/;
		  }
}

这样，访问http://192.168.1.23/proxy/就会被代理到http://192.168.1.5:8090/。匹配的proxy目录不需要存在根目录/var/www/html里面

注意，终端里如果访问http://192.168.1.23/proxy（即后面不带”/”），则会访问失败！因为proxy_pass配置的url后面加了”/”

访问结果如下

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[root@localhost conf.d]# curl http://192.168.1.23/proxy/
this is 192.168.1.5
[root@localhost conf.d]# curl http://192.168.1.23/proxy
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx/1.10.3</center>
</body>
</html>

页面访问http://103.110.186.23/proxy的时候，会自动加上”/”（同理是由于proxy_pass配置的url后面加了”/”），并反代到http://103.110.186.5:8090的结果。
图1

2.1.2 情况二

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
 
location  /proxy/ {
          proxy_pass http://192.168.1.5:8090;
}
}

[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service
## 那么访问http://192.168.1.23/proxy或http://192.168.1.23/proxy/，都会失败！
## 这样配置后，访问http://192.168.1.23/proxy/就会被反向代理到http://192.168.1.5:8090/proxy/

图2

2.1.3 情况三

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
 
location  /proxy/ {
          proxy_pass http://192.168.1.5:8090/haha/;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service
[root@localhost conf.d]# curl http://192.168.1.23/proxy/
192.168.1.5  haha-index.html

这样配置的话，访问http://103.110.186.23/proxy代理到http://192.168.1.5:8090/haha/
图3

2.1.4 情况四

相对于第三种配置的url不加”/”

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
 
location  /proxy/ {
          proxy_pass http://192.168.1.5:8090/haha;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service
[root@localhost conf.d]# curl http://192.168.1.23/proxy/index.html
192.168.1.5   hahaindex.html

##################################### 
上面配置后，访问http://192.168.1.23/proxy/index.html就会被代理到http://192.168.1.5:8090/hahaindex.html
同理，访问http://192.168.1.23/proxy/test.html就会被代理到http://192.168.1.5:8090/hahatest.html
[root@localhost conf.d]# curl http://192.168.1.23/proxy/index.html
192.168.1.5   hahaindex.html

注意，这种情况下，不能直接访问http://192.168.1.23/proxy/，后面就算是默认的index.html文件也要跟上，否则访问失败！
图4

———————————————————————————————————————————
上面四种方式都是匹配的path路径后面加”/”，下面说下path路径后面不带”/”的情况：

2.2 path路径后面不加”/”

2.2.1 情况一

proxy_pass后面url带”/”：

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
  
location  /proxy {
          proxy_pass http://192.168.1.5:8090/;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service

图5

2.2.2 情况二，

proxy_pass后面url不带”/”

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
  
location  /proxy {
          proxy_pass http://192.168.1.5:8090;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service
[root@localhost conf.d]#

这样配置的话，访问http://103.110.186.23/proxy会自动加上”/”（即变成http://103.110.186.23/proxy/），代理到192.168.1.5:8090/proxy/
图7

2.2.3 情况三

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
  
location  /proxy {
          proxy_pass http://192.168.1.5:8090/haha/;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service

这样配置的话，访问http://103.110.186.23/proxy会自动加上”/”（即变成http://103.110.186.23/proxy/），代理到http://192.168.1.5:8090/haha/
图8

2.2.4 情况四

相对于第三种配置的url不加”/”

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[root@localhost conf.d]# cat test.conf
server {
listen 80;
server_name localhost;
location / {
root /var/www/html;
index index.html;
}
  
location  /proxy {
          proxy_pass http://192.168.1.5:8090/haha;
}
}
[root@localhost conf.d]# service nginx restart
Redirecting to /bin/systemctl restart  nginx.service

这样配置的话，访问http://103.110.186.23/proxy，和第三种结果一样，同样被代理到http://192.168.1.5:8090/haha/
图9

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