NginX dynamic rewrite location and alias

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NginX dynamic rewrite location and alias

Egy Mohammad Erdin

12/1/23, 6:24 PM

For developing purpose, my apps need to be tested on different version,
so my idea was to serve it in different url like this :

http://example.com/v3/
http://example.com/v4/
.....
http://example.com/v20/
http://example.com/v45/

my files/folder like this :

/var/www/
      | apps/
          | 3/public/index.php
          | 4/public/index.php
            ....
          | 20/public/index.php
          | 45/public/index.php

using below configuration, i could make it work like expected

location /v3 {
    alias /var/www/apps/3/public;
    try_files $uri $uri/ @versioning;
    include /var/local/config/php7.4.cnf;
}

location /v4 {
    alias /var/www/apps/4/public;
    try_files $uri $uri/ @versioning;
    include /var/local/config/php7.4.cnf;
}
# ......

location /v25 {
    alias /var/www/apps/25/public;
    try_files $uri $uri/ @versioning;
    include /var/local/config/php7.4.cnf;
}
# ......

location /v30 {
    alias /var/www/apps/30/public;
    try_files $uri $uri/ @versioning;
    include /var/local/config/php7.4.cnf;
}

location @versioning { 
    rewrite ^/v([0-9]+)/(.*)$ /v$1/index.php/$2 last; 
}

but, for every version release i need to alter the nginx.conf file.
Therefore I changed it to regex rewrite location with aliases

location ~ ^/v(?<version>[a-z0-9]*)/$ {
    alias /var/www/apps/$version/public;
    try_files $uri $uri/ @versioning;
    include /var/local/config/php7.4.cnf;
}

location @versioning { 
    rewrite ^/v([0-9]+)/(.*)$ /v$1/index.php/$2 last; 
}

using the later config return 404. am i missing something ?
nginx with debug, show following log :

[debug] *1 generic phase: 0
[debug] *1 rewrite phase: 1
[debug] *1 test location: "/"
[debug] *1 test location: ~ "\.php$"
[debug] *1 test location: ~ "/\.ht"
[debug] *1 test location: ~ "^/v(?<version>[a-z0-9]*)/$"
[debug] *1 http regex set $version to "3"
[debug] *1 test location: ~ "\.php$"
[debug] *1 using configuration "^/v(?<version>[a-z0-9]*)/$"
...
[debug] *1 try files handler
[debug] *1 http script copy: "/var/www/apps/"
[debug] *1 http script var: "3"
[debug] *1 http script copy: "/public"
[debug] *1 http script var: "/v3/"
[debug] *1 trying to use file: "/v3/" "/var/www/apps/3/public/v3/"
[debug] *1 add cleanup: 00005598627533A0
[debug] *1 malloc: 0000559862745E40:144
[debug] *1 malloc: 0000559862742430:27
[debug] *1 cached open file: /var/www/apps/3/public/v3/, fd:-1, c:0, e:2, u:1
[debug] *1 http script var: "/v3/"
[debug] *1 trying to use dir: "/v3/" "/var/www/apps/3/public/v3/"
[debug] *1 add cleanup: 00005598627533D8
[debug] *1 cached open file: /var/www/apps/3/public/v3/, fd:-1, c:0, e:2, u:2
[debug] *1 trying to use file: "@versioning" "/var/www/apps/3/public@versioning"
[debug] *1 test location: "@versioning"
[debug] *1 using location: @versioning "/v3/?"
[debug] *1 rewrite phase: 3
[debug] *1 http script regex: "^/v([0-9]+)/(.*)$"
[notice: *1 "^/v([0-9]+)/(.*)$" matches "/v3/", client: xx.192.153.44, server: _, request: "GET /v3/ HTTP/1.1", host: "xx.15.38.80"
[debug] *1 http script copy: "/v"
[debug] *1 http script capture: "3"
[debug] *1 http script copy: "/index.php"
[debug] *1 http script args
[debug] *1 http script copy: "/"
[debug] *1 http script capture: ""
[debug] *1 http script regex end

i think the problem is the path nginx look it up was wrong

[debug] *1 trying to use file: "/v3/" "/var/www/apps/3/public/v3/"
[debug] *1 cached open file: /var/www/apps/3/public/v3/, fd:-1, c:0, e:2, u:1
[debug] *1 trying to use dir: "/v3/" "/var/www/apps/3/public/v3/"

/var/www/apps/3/public/v3/ it append more v3 at the end, whereas it show the correct path /var/www/apps/3/public if i use static rewrite.

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NginX dynamic rewrite location and alias

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