I want to have a validation function it must accept 3 types:
var
portvar
ipvar
one of my problems is in IPvar user input must be in this syntax as example:
[192.168.1.0/24,10.1.1.0/24]
how can I accept just such Ips from textboxes?
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1 Answers
1
You could check it against a regular expression like this:
var textVal = ...;
if ((/^\[(?!,)(,?(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\/[1-9]\d*)+\]$/).test(textVal)) {
alert('Valid!');
}
else {
alert('Invalid!');
}
The regular expression identifies valid IP's with each part of the IP being a number between 0 and 255. Additionally, as your example shows, each IP must be followed by a single / and then a number representing the subnet mask. Lastly, multiple IPs are separated by commas (however the regular expression does not allow a comma at the very beginning or the very end).
(By the way, the second IP address in your example isn't valid).
jerluc
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after / isn't it a subnet mask? – Nickool Jul 05 '11 at 09:03
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if I don't put comma again it will tell valid – Nickool Jul 05 '11 at 09:24
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would you please tell me what are these?(/^\[(?!,) – Nickool Jul 05 '11 at 09:24
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`/^\[(?!,)` means the line must begin with a bracket and should not be immediately followed by a comma. – jerluc Jul 05 '11 at 09:27
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I got it thanks jerluc, can you tell me 25[0-5] means 250 till 255? what is {3}? and the sign =>: – Nickool Jul 05 '11 at 09:33
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Yep that's exactly what the `25[0-5]` means. And `{3}` refers to the previous pattern repeating exactly 3 times. And if you're referring to `(?:` that denotes a non-capturing group, meaning the matched value won't be captured for later use. – jerluc Jul 05 '11 at 09:35