NGINX rewrite to Apache Mod-Rewrite

Question

I'm migrating a reverse proxy from NGINX to Apache, but can't wrap my head around how to convert the nginx rewrites to Apache mod rewrite.

Here's the relevant part of my nginx configuration:

    server { 
    listen           443 ssl;
    server_name localhost;


    #### REWRITE FOR APP PROXY ###
    rewrite ^/app-proxy/([^/]+?)/([^/]+?)/(.*)$ /$2/$1/$3 last;


    #### Final destination, SAL-ASSETS (STATIC FILES)
    location /sal-assets/ {
        alias       /var/www/sal-assets/;
        expires 30d;
    }

    #### Final destination TOMCAT & NG SERVE
    location / {
        proxy_pass          http://localhost:8080;
    }

    location /sal-frontnd/ {
        proxy_pass          http://localhost:4200;
    }

    location /sal-backend/ {
        proxy_pass          http://localhost:4200;
    }

}

Here's what I've got so far for Apache:

ProxyPass               /sal-frontend/     http://localhost:4200/sal-frontend/
ProxyPassReverse        /sal-frontend/     http://localhost:4200/sal-frontend/
ProxyPass               /sal-admin/     http://localhost:4200/sal-admin/
ProxyPassReverse        /sal-admin/     http://localhost:4200/sal-admin/
ProxyPass               /sal-backend/     http://localhost:8080/
ProxyPassReverse        /sal-backend/     http://localhost:8080/

<Directory "C:/xampp/htdocs">
RewriteEngine on
RewriteRule rewrite ^/app-proxy/([^/]+?)/([^/]+?)/(.*)$ /$2/$1/$3

Unfortunately my rewrite rule seems to be broken?

AH00526: Syntax error on line 253 of C:/xampp/apache/conf/httpd.conf:
RewriteRule: bad flag delimiters

Would appreciate any hint.

Answer 1

The following finally worked for me:

<Directory />
RewriteEngine On
AllowOverride All
Require all denied
RewriteRule /app-proxy/([^/]+?)/([^/]+?)/(.*) /$2/$1/$3 [L,NC]
</Directory>

• Remove the "rewrite" from the RewriteRule line, as suggested by Dusan
• Move from to
• Set AllowOverride All
• Remove ^ and $ from regex so that we have /app-proxy/([^/]+?)/([^/]+?)/(.*)
• Add [L,NC]