Rewriting 302 redirects

Nice work! This looks really close, not to mention tricky! You can simplify it a little though.

when HTTP_RESPONSE {
  if { [HTTP::status] == "302" } {
    if { [HTTP::header "Location"] starts_with "http://example.com/secure/" } {
        HTTP::header replace "Location" [string map {http https} [HTTP::header "Location"] ]
    }
  }
}

Of course, it sounds like you're going to have multiple URLs you want to check for in the location header. In this case you'll want to make use of either switch or matchclass, depending on how many you want to check.

That would look something like"

when HTTP_RESPONSE {
  if { [HTTP::status] == "302" } {
    switch -glob [string tolower [HTTP::header "Location"] ] {
      "http://example.com/secure/*" -
      "http://example.com/private/*" -
      "http://example.com/restricted/*" -
      "http://someothersite.com/keepout/*" -
      "http://reallyprivatestuff.com/shouldbeencrypted/*" -
      default {
        HTTP::header replace "Location" [string map {http https} [HTTP::header "Location"] ]
      }
    }
  }
}

HTH,

Colin