Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Re: Don't Use Regular Expressions To Parse IP Addresses!

by dws (Chancellor)
on Dec 21, 2002 at 02:24 UTC ( #221555=note: print w/ replies, xml ) Need Help??


in reply to Don't Use Regular Expressions To Parse IP Addresses!

Regular expressions should not be used to parse IP addresses because IP addresses can be expressed in several forms...

"Yes, but..."

There are plenty of situations, such as parsing server logfiles, where four-part IP addresses are a given. In these cases, using a regex is just fine.

The only case I've actually run across in practice where using a regex isn't safe is when parsing URLs where some spammer has obscured an IP address by using a non-standard forms.


Comment on Re: Don't Use Regular Expressions To Parse IP Addresses!

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://221555]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (6)
As of 2014-07-12 00:45 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    When choosing user names for websites, I prefer to use:








    Results (238 votes), past polls