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https://issues.apache.org/jira/browse/CODEC-95?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12985836#action_12985836
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Julius Davies commented on CODEC-95:
------------------------------------

This jar is surprisingly popular, and I think a lot of our users would be quite 
surprised if it started throwing exceptions in places where it hasn't thrown an 
exception in 8 years.

[Look how much trouble we got into for accidentally adding "\r\n" to some 
outputs:  CODEC-89 !!!]

I will add a new static method, Base64.isStringBase64(String base64), shortly.  
If you create RejectingInputStream.java and add that as a patch, people could 
also do this:

myStream = new Base64InputStream(new RejectingInputStream(myStream));



> Base64: optionally allow strict parsing of base64 strings
> ---------------------------------------------------------
>
>                 Key: CODEC-95
>                 URL: https://issues.apache.org/jira/browse/CODEC-95
>             Project: Commons Codec
>          Issue Type: Improvement
>    Affects Versions: 1.4
>            Reporter: Adam Rabung
>            Priority: Minor
>         Attachments: strictMode.zip
>
>
> Currently, Codec skips base64 characters that are outside of the encode 
> table.  I realize this is perfectly to spec, but I wonder if other users 
> might appreciate a "strict" mode that throws an exception when one of these 
> illegal characters are encountered.  For example, I would love an exception 
> to be thrown here:
> new Base64().decode("!@#$ iHaveIllegalCharsAtBeginningAndEnd %^&"));

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