nginx change root folder for specific url - nginx

Question

I have a configuration file like this one below:
server {
listen 80;
server_name localhost;
#charset utf-8;
root html/laravel/public;
index index.html index.php;
#browse folders if no index file
autoindex on;
# enforce NO www
if ($host ~* ^www\.(.*))
{
set $host_without_www $1;
rewrite ^/(.*)$ $scheme://$host_without_www/$1 permanent;
}
# serve static files directly
location ~* \.(jpg|jpeg|gif|css|png|js|ico|html)$ {
access_log off;
#expires max;
}
# removes trailing slashes (prevents SEO duplicate content issues)
if (!-d $request_filename)
{
rewrite ^/(.+)/$ /$1 permanent;
}
# canonicalize codeigniter url end points
# if your default controller is something other than "welcome" you should change the following
# if ($request_uri ~* ^(/lobby(/index)?|/index(.php)?)/?$)
# {
# rewrite ^(.*)$ / permanent;
# }
# removes trailing "index" from all controllers
if ($request_uri ~* index/?$)
{
rewrite ^/(.*)/index/?$ /$1 permanent;
}
# unless the request is for a valid file (image, js, css, etc.), send to bootstrap
if (!-e $request_filename)
{
rewrite ^/(.*)$ /index.php?/$1 last;
break;
}
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
location /backend/ {
root /html/frontend;
}
location ~ \.php$ {
include fastcgi.conf;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi_params;
}
location ~ /\.ht {
deny all;
}
# catch all
# error_page 404 /index.php;
# location ~ \.php$ {
# try_files $uri =404;
# fastcgi_pass unix:/tmp/php.socket;
# fastcgi_index index.php;
# #include fastcgi_params;
# include /home/tamer/code/nginx/fastcgi_params;
# }
# access_log /home/tamer/code/laravel/storage/logs.access.log;
# error_log /home/tamer/code/laravel/storage/logs.error.log;
}
I have to change root folder to html/backend for any url with $host/backend/. All rules for load pages have to be the same, only root folder have to change.
How can I do that?

Answer 1

server {
location / {
root /data/www;
}
location /images/ {
root /data;
rewrite ^/images/(.+?)$ $1 break; #following is the explation
}
}
use break to continue; the root in location will take effect
use last to internal simulate request; the root in location will not take effect
use permanent to 301 redirect;
use redirect to 302 redirect;

Answer 2

adding 127.0.0.1 to server_name to be able to use the link you provided in the comment 127.0.0.1
server_name localhost 127.0.0.1;
also you still need to have the backend location with root inside it.
location /backend/ {
root /html/backend;
}

Answer 3

I'll take a wild guess here:
location /backend/ {
root /html/backend;
try_files $uri $uri/ /index.php?_url=$uri&$args;
}
This means: all requests to .../backend/* will be redirected to the location block of php followed after:
location ~ \.php${ ... }
and php will handle those requests as backend scripts

Answer 4

Nginx Beginner's Guide has this example:
server {
location / {
root /data/www;
}
location /images/ {
root /data;
}
}
So in theory this should work for you:
server {
listen 80;
server_name localhost;
location / {
root html/laravel/public;
}
location /backend/ {
root html/backend;
}
# common config goes here
}

Answer 5

If I understood the question correctly you can use alias to change just the OS search path for a specific location:
Defines a replacement for the specified location. For example, with the following configuration on request of “/i/top.gif”, the file /data/w3/images/top.gif will be sent.
location /i/ {
alias /data/w3/images/;
}

Answer 6

You need to define new location and use alias instead of root or else the behaviour would be funky. Also you need to define location for .php to use $request_filename.
location /backend {
alias /html/backend;
try_files $uri $uri/ /index.php$is_args$args;
location ~ \.php$ {
fastcgi_param SCRIPT_FILENAME $request_filename;
}
}