Enforce get method for validation checks

[miglen]

The following change enforces the use of get in the form validation instead of post which was recently introduced by default and it's breaking the plugin functionality.

• [ X] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• [ X] Ensure that the pull request title represents the desired changelog entry
• [ X] Please describe what you did
• [ X] Link to relevant issues in GitHub or Jira
• [ X] Link to relevant pull requests, esp. upstream and downstream changes
• [ X] Ensure you have provided tests - that demonstrates feature works or fixes the issue

Related issue: https://issues.jenkins.io/browse/JENKINS-65790

[miglen]

Ping @yyuu @asfaltboy

[sabberworm]

Wouldn’t it be better to enforce POSTs and switch the endpoints in rack.rb?

[miglen]

Could be, but I couldn’t build the plugin as the dependencies are quite outdated.

…

On Wed 30 Jun 2021 at 18:54, Raphael Schweikert ***@***.***> wrote: Wouldn’t it be better to enforce posts and switch the endpoints in rack.rb? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAMEE65Q6W5B5QQOXEHUTPLTVM42TANCNFSM464F7RBA> .

[sabberworm]

For future reference, the change that caused this regression is at jenkinsci/jenkins#4623