How to validate hostname (may be IP) and port number (CString)
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06-07-2019 - |
Question
I have an dialog for HTTP proxy configuration with hostname and port edit boxes.
My question is how can I validate user input for correct hostname and port?
May be I have to use some regular expression for hostname validation or there is some helpful MFC or WinAPI function? What is the maximum correct number for port?
Solution
- Port number is an unsigned short from 1-65535, ports under 1024 are reserved for system services http, ftp, etc.
- I don't believe that you can validate host name (or should) especially when you have locallized host names.
OTHER TIPS
You can use Apache Commons Validator's InetAddressValidator. Check out http://commons.apache.org/proper/commons-validator/apidocs/org/apache/commons/validator/routines/InetAddressValidator.html.
That project has many validator utilities you can reuse. Hope it helps.
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