How to Extract an Ip Address from an HTML String

How to extract an IP address from an HTML string?

Remove your capturing group:

ip = re.findall( r'[0-9]+(?:\.[0-9]+){3}', s )

Result:

['165.91.15.131']

Notes:

• If you are parsing HTML it might be a good idea to look at BeautifulSoup.
• Your regular expression matches some invalid IP addresses such as 0.00.999.9999. This isn't necessarily a problem, but you should be aware of it and possibly handle this situation. You could change the + to {1,3} for a partial fix without making the regular expression overly complex.

Extract ip address and port from a string in javascript

window.location.hostname and window.location.port

Read more about window.location at https://developer.mozilla.org/en-US/docs/Web/API/window.location

Extract ip address from a string using regex

You have defined r as string, initialize it as regular expression.

var r = /\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/;

var r = /\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/; //http://www.regular-expressions.info/examples.html

var a = "http://www.example.com/landing.aspx?referrer=10.11.12.13";

var t = a.match(r);
console.log(t[0])

extract ip address from string

if you get to a point where you have the IP mixed with a couple of tags, you could simple appy the php function strip_tags() to it:

$ip = "176.<wbr>199.<wbr>114.<wbr>9";
$cleanIp = strip_tags($ip); //output 176.199.114.9

How can I find the IP address in a string

. is not a literal period in regex. It represents all characters. You'll need to escape it with a backslash. Also, don't forget to include the last group of digits that is not followed by a period.

szukane = r'(?:\d{1,3}\.)+(?:\d{1,3})'

Result:

>>> re.findall(r'(?:\d{1,3}\.)+(?:\d{1,3})', "asdadsasdas 192.168.1.1 asdasdadasdasd 10.22.10.5asfasfaff 172.10.5.1safafa")
['192.168.1.1', '10.22.10.5', '172.10.5.1']

Regex to extract the ip address from URL

use the structure of the URL to fashion very simple regular expression:

 http://(.*?)/

Lua - Extract IP address from any URL format

Your example already pretty much works, you just don't need leading .+ that eats extra symbols from front of IP.

local ip = s6:match("(%d+%.%d+%.%d+%.%d+)")

Still, this pattern is pretty loose and will match many other groups of 4 numbers separated by dots. You might want to at least limit each digit group to 3 digits. Decide if you need more robust pattern based on how important is that script you're writing and if people will try to exploit it by throwing bad data at it or not.

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