# \[Solved\] Reversing http-request set-path

**URL:** https://discourse.haproxy.org/t/solved-reversing-http-request-set-path/2755
**Category:** Help!
**Created:** [July 19, 2018, 6:31pm UTC](https://discourse.haproxy.org/t/solved-reversing-http-request-set-path/2755 "2018-07-19T18:31:30Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![yakatz](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.haproxy.org/yakatz/32/548_2.png) [@yakatz](https://discourse.haproxy.org/u/yakatz)
#### Post date: [July 19, 2018, 6:31pm UTC](https://discourse.haproxy.org/t/solved-reversing-http-request-set-path/2755/1 "2018-07-19T18:31:30Z")

</div>

We have a lot of projects with subdomains, so we set up haproxy to rewrite the path to match the subdomain and we have a CNAME for each project to `projects.example.com`:

```
listen projects_example_com
  bind ip_address:443 ssl crt /etc/haproxy/ssl/star_example_com.pem
  bind ip_address:80 
  mode http
  acl is_root var(req.rewrite_project) projects
  http-request set-var(req.rewrite_project) req.hdr(host),lower,regsub(\.example\.com$,) if { hdr_end(host) -i .example.com }
  http-request set-path /projects/%[var(req.rewrite_project)]%[path] if { var(req.rewrite_project) -m found }
  use_backend projects_default if is_root
  use_backend projects_backend-ssl if { ssl_fc }
  use_backend projects_backend if !{ ssl_fc }

backend projects_backend
  mode http
  server server1 172.24.0.33:8034 check
  server server2 172.24.0.34:8034 check
  server server3 172.24.0.41:8034 check

backend projects_backend-ssl
  mode http
  server server1 172.24.0.33:8434 check ssl verify none
  server server2 172.24.0.34:8434 check ssl verify none
  server server3 172.24.0.41:8434 check ssl verify none

backend projects_default
  mode http
  errorfile 503 /etc/haproxy/errors/projects.html.http

```

This works great except when you go to `http://project2.example.com/folder` and the backend Apache server tries to add the missing trailing slash by redirecting to `http://project2.example.com/projects/project2/folder/`, which then results in the new request for a folder that doesn’t exist, `/projects/project2/projects/project2/folder/`. Is there any way to get HAProxy to filter the returned URL to remove the extra `/projects/project2`?

---

<div class="post-metadata">

### Author: ![yakatz](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.haproxy.org/yakatz/32/548_2.png) [@yakatz](https://discourse.haproxy.org/u/yakatz)
#### Post date: [August 5, 2018, 9:00pm UTC](https://discourse.haproxy.org/t/solved-reversing-http-request-set-path/2755/2 "2018-08-05T21:00:35Z")

</div>

We managed to fix it like this:

```
listen projects_example_com
bind ip_address:443 ssl crt /etc/haproxy/ssl/star_example_com.pem
bind ip_address:80 
mode http
acl is_root var(req.rewrite_project) projects
http-request set-var(req.rewrite_project) req.hdr(host),lower,regsub(\.example\.com$,) if { hdr_end(host) -i .example.com }
http-request set-path /projects/%[var(req.rewrite_project)]%[path] if { var(req.rewrite_project) -m found }
http-response replace-header Location (http|https)://([^/]*)/projects/([^/]*)/(.*)$ \1://\2/\4
use_backend projects_default if is_root
use_backend projects_backend-ssl if { ssl_fc }
use_backend projects_backend if !{ ssl_fc }
```