Trouble with OAuth

[Michael Day]

I am struggling to make OAuth plugins work with GoCD

I am using Version: 21.2.0-12498 of GoCD installed on Ubuntu 20.04.3 LTS

I have tried building both https://github.com/gocd-contrib/github-oauth-authorization-plugin and https://github.com/gocd-contrib/google-oauth-authorization-plugin but I have not managed to get either working.

With the github one, which I did today, It configures ok, and I can enter my client id and secret and PAT and when I click the check connection button it says it's ok. But when I try and use it to log in I get a 500 error, but nothing more in the logs than 

2021-09-22 19:24:34,885 WARN [qtp1325802001-34] HttpChannel:673 - handleException /go/plugin/cd.go.authorization.github/login java.net.MalformedURLException: no protocol:

I saw a similar error with the Google plugin which I reported here https://github.com/gocd-contrib/google-oauth-authorization-plugin/issues/128 
I apparently solved that one by changing to java-1.13.0-openjdk-amd64 and rebuilding, but I never managed to get it working either.

I noticed on https://docs.gradle.org/current/userguide/compatibility.html that java 15 which https://github.com/gocd/gocd/pull/9086 suggests is what I'm using is only compatible with gradle 6.7+ and both the plugins claim to only be using 6.6.1 

Is this likely to be my trouble or am I barking up the wrong tree?

Thanks for any help you can offer.

[Ketan Padegaonkar]

Are you using a reverse proxy (https://docs.gocd.org/current/installation/configure-reverse-proxy.html) Is it configured properly?

If everything else fails, try setting the site URL under server configuration.

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[Michael Day]

I am using a reverse proxy, an AWS ALB. I have looked at the configurations you linked got nginx and apache and don't see anything glaringly obvious they are doing which isn't happening on the ALB.
The ALB sets 

• X-Forwarded-For
• X-Forwarded-Proto
• X-Forwarded-Port

As per the docs here https://docs.aws.amazon.com/elasticloadbalancing/latest/application/x-forwarded-headers.html 

and my configuration send all requests to the public IP to :8153 on the EC2 instance running GoCD

I have set the site URL under server configuration as it was useful to get functioning link via the slack plugin.

I guess I could install nginx on the instance and dispense with the ALB to ensure the proxy settings are correct.

Thanks for the help.

I'll report back if I get it working.

[Michael Day]

I got it working.

After reading this: https://github.com/gocd/gocd/issues/741

I set both the Site URL and the Secure Site URL in the server configuration and now it works.

Thanks for pointing me in the direction.