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Base64 Error Checking

Posted on 2006-06-23
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Last Modified: 2010-04-23
I am trying to find an easy way to remove any data which does not belong in a base 64 string. IE the string might look like the one below

"Hello
This is a test


please note VbCrLf's are not allowed in Base64 nor are single qoutes."

Is there an easy why just to replace all the non base 64 characters?
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Question by:sk33v3
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4 Comments
 
LVL 23

Expert Comment

by:Jens Fiederer
ID: 16971794
You could use regular expressions.

Replace [^a-zA-Z0-0/+] with the empy string.
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LVL 23

Expert Comment

by:Jens Fiederer
ID: 16971799
Make that [^a-zA-Z0-9/+]  (mistyped).
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LVL 9

Author Comment

by:sk33v3
ID: 16971815
Sorry I am not familiar with regular expressions. I vaguely know what they are but I have not used them. Within my code how would I use that?
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LVL 23

Accepted Solution

by:
Jens Fiederer earned 500 total points
ID: 16971897
system.Text.RegularExpressions.Regex.Replace("123#$%abc" & vbCRLF & "foo---+/bar1", _
             "[^0-9A-Za-z/+]", "", Text.RegularExpressions.RegexOptions.Singleline)


will give you:

"123abcfoo+/bar1"
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