Rewrite urls for response with absolute urls

@Mowijo wrote:

Hi all.

I have Jenkins running on Tomcat with HAProxy as a reverse proxy in front of it. That works kind of OK and my haproxy.conf is listet at the end of my post, but I have a problem with rewriting paths in the response.

when I GET ht.tp://192.168.1.16/jenkins I get the correct HTML returned, but all links are absolute to the host's root, and thus my webbrowser cannot fetch them as it tries e.g. ht.tp://192.168.1.16/static/style.css instead of ht.tp://192.168.1.16/jenkins/static/style.css.

If only it was a matter of rewriting domains, I would be home safe, but because of that pesky start o the path I am stuck.
I have tried to change the server and/or host to ht.tp://192.168.1.16/jenkins as in the configuration file below.

Can what I want be one?
How? Any pointers and hints are appreciated. (I tried setting the JENKINS_URL in the jenkins control panel, which didn't work. Also a generic solution would be convenient.)

Thanks,
Morten

I am running HA-Proxy version 1.6.6 2016/06/26

My haproxy.conf:

global
    maxconn 4096

defaults
    log  global
    maxconn  2000
    mode  http
    option  redispatch
    option  forwardfor
    option  http-server-close
    retries  3
    timeout  http-request 10s
    timeout  queue 1m
    timeout  connect 10s
    timeout  client 1m
    timeout  server 1m
    timeout  check 10s

frontend http-in
    bind *:80
    
    reqadd  X-Forwarded-Proto:\ http

    acl is_MyWebApp path_beg /MyWebApp
    use_backend MyWebApp if is_MyWebApp
    
        
        
backend MyWebApp
    option httpclose
    option forwardfor
    
    http-response  set-header Location ht.tp://192.168.1.16/MyWebApp
    http-response  set-header Server ht.tp://192.168.1.16/MyWebApp
    http-response  set-header Host ht.tp://192.168.1.16/MyWebApp    
    
    reqrep ^([^\ ]*\ /)MyWebApp[/]?(.*)     \1\2
    server s2 192.168.1.16:8080  maxconn 32

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