SSL redirection rule with regular expresion

I think Joe is suggesting using the switch command with strings instead of a regex because it's more resource intensive to use a regex.

You can use the question mark as a wildcard representing any single character. So this should match what you've described so far, where any request that starts with /, any three characters, another forward slash followed by anything would be redirected to the same host and URI via HTTPS:

when HTTP_REQUEST {
  switch -glob [HTTP::uri] {
    /???/* {
      HTTP::redirect "https://[HTTP::host][HTTP::uri]"
    }
  }
}

You can check the TCL man page on switch (Click here) and string match (Click here) for details on string wildcards.

Aaron