create application paths with haproxy - haproxy

Question

I have a server running multiple web apps on different ports without any root application path. I can currently access them by, http://myServer:8001, http://myServer:8002, etc and I would like to access them via HaProxy as http://myServer/app1, http://myServer/app2, etc
I found multiple links using reqrep but i could not make it work. Here is my last attempt before I gave up:
frontend http-in
option forwardfor
bind *:80
acl is-app1 path_beg /app1
use_backend app1 if is-app1
acl is-app2 path_beg /app2
use_backend app2 if is-app2
backend app1
reqrep ^Location:\ /app1/?(.*) Location:\ /\1
rsprep ^Location:\ (.*) Location:\ /app1/\1
server localhost 127.0.0.1:8001
backend app2
reqrep ^Location:\ /app2/?(.*) Location:\ /\1
rsprep ^Location:\ (.*) Location:\ /app2/\1
server localhost 127.0.0.1:8002
From the examples i saw, i expected this single line to be enough (no need for rsprep), but i can't make it work.
reqrep ^([^\ :]*)\ /app1/?(.*) \1\ /\2

Answer 1

Give this a try - you may have to modify a little to suit your requirements.
frontend http-in
bind *:80
mode http
option httplog
option dontlognull
option forwardfor
# if "/app1"
use_backend app1 if { path_beg /app1/ }
# if "/app2"
use_backend app2 if { path_beg /app2/ }
backend app1
reqrep ^([^\ :]*)\ /app1/(.*) \1\ /\2
option forwardfor
server localhost 127.0.0.1:8001
backend app2
reqrep ^([^\ :]*)\ /app2/(.*) \1\ /\2
option forwardfor
server localhost 127.0.0.1:8002