SMEE 5.0.0 not working under WSL

[francisconroy]

I've got Jenkins and smee running under WSL (ubuntu 24.04 LTS) and was having endless trouble trying to get a post working to my Jenkins GitHub plugin endpoint using
smee --target http://172.24.57.183:8080/github-webhook/ --url https://smee.io/[MY_SMEE_ID]/

Finally I decided to try to use the 4.4.3 version instead and immediately it started working for me with the exact same invocation...

full log

francis@Francis-PC:~$ npm install -g smee-client@5.0.0

removed 1 package, and changed 4 packages in 429ms
francis@Francis-PC:~$ smee --target http://172.24.57.183:8080/github-webhook/ --url https://smee.io/[MY_SMEE_ID]/
Connected to https://smee.io/[MY_SMEE_ID]
Forwarding https://smee.io/[MY_SMEE_ID]to http://172.24.57.183:8080/github-webhook
POST http://172.24.57.183:8080/github-webhook/ - 405
^C
francis@Francis-PC:~$ npm install -g smee-client@4.4.3

added 1 package, and changed 4 packages in 485ms
francis@Francis-PC:~$ smee --target http://172.24.57.183:8080/github-webhook/ --url https://smee.io/[MY_SMEE_ID]/
Forwarding https://smee.io/[MY_SMEE_ID]/ to http://172.24.57.183:8080/github-webhook/
Connected https://smee.io/[MY_SMEE_ID]/
POST http://172.24.57.183:8080/github-webhook/ - 200

I can have a look at capturing a wireshark log to see what's actually happening on v5.0.0 under the hood

[francisconroy]

Looking at the wireshark capture I can see a difference between the versions.
Version 5.0.0 seems to be using this URI http://172.24.57.183:8080/github-webhook
However 4.3.3 is using this URI http://172.24.57.183:8080/github-webhook/
I'm certain that this is the critical difference

[francisconroy]

Capture 5.0.0

Capture 4.3.3