Enhance CGI support

[misalcedo]

Required Tasks

The following tasks

• [x] Set the remote user and auth type if set on the request URI or via HTTP basic auth
• [ ] Add support for CGI scripts without an extension.

Optional Tasks

• [ ] Allow setting environment variables for specific scripts run to inherit. Disallows overriding CGI or protocol metavariables. One option is to forward env vars passed in via CLI to any script as a first pass. This would include the PATH variable.
• [ ] Allow mapping a path as a script alias.
• [ ] Allow mapping a path to a file system location.

Links

• See https://git-scm.com/docs/git-http-backend for an example CGI script that should work after these changes.
• See https://www.rfc-editor.org/rfc/rfc3875.html#section-4.1.1 for details on the AUTH_TYPE meta variable.
• • See https://www.rfc-editor.org/rfc/rfc3875.html#section-4.1.11 for details on the REMOTE_USER meta variable.

[misalcedo]

Example Basic Auth without Password:

$ curl -vvv http://misalcedo@github.com
*   Trying 140.82.112.4:80...
* Connected to github.com (140.82.112.4) port 80
* Server auth using Basic with user 'misalcedo'
> GET / HTTP/1.1
> Host: github.com
> Authorization: Basic bWlzYWxjZWRvOg==
> User-Agent: curl/8.4.0
> Accept: */*
> 
< HTTP/1.1 301 Moved Permanently
< Content-Length: 0
< Location: https://github.com/
< 
* Connection #0 to host github.com left intact
$ echo 'bWlzYWxjZWRvOg==' | base64 -d
misalcedo:%                                        

Example Basic Auth with Password:

$ curl -vvv http://misalcedo:passsword@github.com
*   Trying 140.82.114.3:80...
* Connected to github.com (140.82.114.3) port 80
* Server auth using Basic with user 'misalcedo'
> GET / HTTP/1.1
> Host: github.com
> Authorization: Basic bWlzYWxjZWRvOnBhc3Nzd29yZA==
> User-Agent: curl/8.4.0
> Accept: */*
> 
< HTTP/1.1 301 Moved Permanently
< Content-Length: 0
< Location: https://github.com/
< 
* Connection #0 to host github.com left intact
$ echo 'bWlzYWxjZWRvOnBhc3Nzd29yZA==' | base64 -d
misalcedo:passsword%                                                            

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.