Github user jaredfrees commented on a diff in the pull request:
https://github.com/apache/guacamole-client/pull/299#discussion_r195733455
--- Diff:
guacamole-ext/src/main/java/org/apache/guacamole/token/StandardTokens.java ---
@@ -74,6 +76,11 @@
*/
private static final String TIME_FORMAT = "HHmmss";
+ /**
+ * The prefix of the arbitrary attribute tokens.
+ */
+ public static final String ATTR_TOKEN_PREFIX = "GUAC_ATTR:";
--- End diff --
I think I'll change it so it fits into the current RegEx.
---