CodeIgniter URL rewrite with Nginx - codeigniter

Question

I'm trying to migrate a site under CodeIgniter from Apache to Nginx. My first tests show very good performances, so it worst the try.
But I can't find the correct Nginx configuration to replace those RewriteRules :
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
I found this recipe on Nginx website https://www.nginx.com/resources/wiki/start/topics/recipes/codeigniter/
location / {
try_files $uri $uri/ /index.php;
}
It works in most cases, except when I have a trailing slash. Meaning
http://example.com/controller/param/
will call http://example.com/controller/function/index.php (and return a 404)
instead of http://example.com/index.php/controller/function/ ...as it usually do with Apache rewrite.
I tried to add a rewrite :
rewrite ^/(.*)/$ /$1 permanent;
But it redirect POST to GET, so I loose all my post data...
Any clue ?
Thanks

Answer 1

Check if this helps. Replace both occurrences of <source_directory>; with your correct value:
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
root <source_directory>;
rewrite_log on;
index index.html index.php;
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
if ($host ~* ^www\.(.*))
{
set $host_without_www $1;
rewrite ^/(.*)$ $scheme://$host_without_www/$1 permanent;
}
# canonicalize codeigniter url end points
# if your default controller is something other than "welcome" you should change the following
if ($request_uri ~* ^(/welcome(/index)?|/index(.php)?)/?$)
{
rewrite ^(.*)$ / permanent;
}
# removes trailing "index" from all controllers
if ($request_uri ~* index/?$)
{
rewrite ^/(.*)/index/?$ /$1 permanent;
}
# removes trailing slashes (prevents SEO duplicate content issues)
if (!-d $request_filename)
{
rewrite ^/(.+)/$ /$1 permanent;
}
# removes access to "system" folder, also allows a "System.php" controller
if ($request_uri ~* ^/system)
{
rewrite ^/(.*)$ /index.php?/$1 last;
break;
}
# unless the request is for a valid file (image, js, css, etc.), send to bootstrap
if (!-e $request_filename)
{
rewrite ^/(.*)$ /index.php?/$1 last;
break;
}
# use fastcgi for all php files
location ~ \.php$
{
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME <source_directory>$fastcgi_script_name;
include fastcgi_params;
}
# deny access to apache .htaccess files
location ~ /\.htaccess
{
deny all;
}
error_page 404 /404.html;
location = /40x.html
{
}
error_page 500 502 503 504 /50x.html;
location = /50x.html
{
}
}