Railo 4.2 Reference
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Canonicalization is simply the operation of reducing a possibly encoded string down to its simplest form.
      This is important, because attackers frequently use encoding to change their input in a way that will bypass validation filters,
      but still be interpreted properly by the target of the attack.
      Note that data encoded more than once is not something that a normal user would generate and should be regarded as an attack.


canonicalize(string input,boolean restrictMultiple,boolean restrictMixed):string


The arguments for this function are set. You can not use other arguments except the following ones.
Name Type Required Description
input string  Yes the input string to encode  
restrictMultiple boolean  Yes true if checking for multiple encoding is desired, false otherwise.  
restrictMixed boolean  Yes true if checking for mixed encoding is desired, false otherwise