Make mconf-decrypter work with HTTPS and redirects

It now works with HTTPS URLs and will follow one redirect. The redirect is
useful for when the server being requested redirects HTTP to HTTPS.

record-and-playback/mconf_decrypter/scripts/mconf-decrypter.rb

@@ -40,11 +40,25 @@ $recording_dir = bbb_props['recording_dir']
 $raw_dir = "#{$recording_dir}/raw"
 $archived_dir = "#{$recording_dir}/status/archived"
 
+def getRequest(url)
+  BigBlueButton.logger.info("Fetching #{url}")
+  url_parsed = URI.parse(url)
+  http = Net::HTTP.new(url_parsed.host, url_parsed.port)
+  http.use_ssl = (url_parsed.scheme.downcase == "https")
+  http.get(url_parsed.request_uri)
+end
+
 def fetchRecordings(url)
-  #BigBlueButton.logger.debug("Fetching #{url}")
   doc = nil
   begin
-    doc = Nokogiri::XML(Net::HTTP.get_response(URI.parse(url)).body)
+    response = getRequest(url)
+    # follow redirects once only
+    if response.kind_of?(Net::HTTPRedirection)
+      BigBlueButton.logger.info("Received a redirect, will make a new request")
+      response = getRequest(response['location'])
+    end
+
+    doc = Nokogiri::XML(response.body)
     returncode = doc.xpath("//returncode")
     if returncode.empty? or returncode.text != "SUCCESS"
       BigBlueButton.logger.error "getRecordings didn't return success:\n#{doc.to_xml(:indent => 2)}"