Get domain from string? - Python

Question

i needed help. How do i get domain from a string?

For example: "Hi im Natsume, check out my site http://www.mysite.com/"

How do i get just mysite.com?

Output example:

http://www.mysite.com/ (if http entered)

www.mysite.com (if http not entered)

mysite.com (if both http and www not entered)

What have you tried? Have you thought about searching the string for certain defining characteristics? — Paul Seeb
– Paul Seeb, Commented Jun 27, 2012 at 12:59

shiva · Accepted Answer · 2012-06-28 09:18:59Z

1

myString = "Hi im Natsume, check out my site http://www.mysite.com/"
>>> a = re.search("(?P<url>https?://[^\s]+)", myString) or re.search("(?P<url>www[^\s]+)", myString)
>>> a.group("url")
'http://www.mysite.com/'
>>> myString = "Hi im Natsume, check out my site www.mysite.com/"
>>> a = re.search("(?P<url>https?://[^\s]+)", myString) or re.search("(?P<url>www[^\s]+)", myString)
>>> a.group("url")
'www.mysite.com/'

edited Jun 28, 2012 at 9:18

answered Jun 27, 2012 at 13:00

shiva

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6 Comments

Natsume Over a year ago

Ok now i how to get the URL, if user didnt enter http? I mean it can accept either if http is entered or not, and also if www is entered or not entered either

shiva Over a year ago

@Nastume use re.search("(?P<url>www[^\s]+)", myString).group("url")

Natsume Over a year ago

hmm it still unable to accept if user didnt enter either http or www either :(

shiva Over a year ago

@Nastume can give me an example input and output for your case

Natsume Over a year ago

so far i can only do this re.search("(?P<url>(https?|www)[^\s]+)", a).group("url") but still unable to accept if http or www not entered

|

unwind · Accepted Answer · 2012-06-27 12:58:48Z

1

Well ... You need some way to define what you consider to be something that has a "domain". One approach might be to look up a regular expression for URL-matching, and apply that to the string. If that succeeds, you at least know that the string holds a URL, and can continue to interpret the URL in order to look for a host name, from which you can then extract the domain (possibly).

answered Jun 27, 2012 at 12:58

unwind

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Comments

Ashwini Chaudhary · Accepted Answer · 2012-06-27 13:07:20Z

1

s= "Hi im Natsume, check out my site http://www.mysite.com/"
start=s.find("http://") if s.find("http://")!=-1 else s.find("https://")+1
t = s[start+11:s.find(" ",start+11)]
print(t)

output: mysite.com

answered Jun 27, 2012 at 13:07

Ashwini Chaudhary

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Comments

theharshest · Accepted Answer · 2012-06-27 13:14:04Z

1

If you want to use regular expression, one way could be -

>>> s = "Hi im Natsume, check out my site http://www.mysite.com/"
>>> re.findall(r'http\:\/\/www\.([a-zA-Z0-9\.-_]*)\/', s)
['mysite.com']

..considering url ends with '/'

edited Jun 27, 2012 at 13:14

answered Jun 27, 2012 at 13:03

theharshest

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3 Comments

Natsume Over a year ago

Ahh i like your code a bit. But how to get the domain if the user didnt enter http:// or www?

theharshest Over a year ago

In that case, you can simply do - >>> s = "Hi im Natsume, check out my site mysite.com" >>> [t for t in s.split() if '.com' in t] ['mysite.com']

Natsume Over a year ago

the regex i modified -> raw = re.findall(r'([a-zA-Z0-9\.]*)([a-zA-Z0-9\/]*)', url), im tyring to make the regex to find domain if http:// or www is entered or not, and either the url is at the beginning, end, or in the middle of the string

user278064 · Accepted Answer · 2012-06-27 13:19:03Z

1

If all the sites had the same format, you could use a regexp like this (which work in this specific case):

re.findall('http://www\.(\w+)\.com', url)

However you need a more complex regexp able to parse whichever url and extract the domain name.

edited Jun 27, 2012 at 13:19

answered Jun 27, 2012 at 13:01

user278064

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1 Comment

derevo Over a year ago

if domain have structure like this, my-web-site.com (\w+) find just "site"

Ayush Kurlekar · Accepted Answer · 2020-10-14 04:55:01Z

0

Best way is to use regex to extract the URL. Then use tldextract to get valid domain name from the URL.

import re
import tldextract

text = "Hi im Natsume, check out my site http://www.example.com/"
urls = re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', text)
found_url = urls[0]
info = tldextract.extract(found_url)
domain_name = info.domain
suffix_name = info.suffix
final_domain_name  = domain_name+"."+suffix_name
print(final_domain_name)

edited Oct 14, 2020 at 4:55

answered Oct 13, 2020 at 6:56

Ayush Kurlekar

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1 Comment

ZF007 Over a year ago

@user_3pij check out the mods I've made. URL is in capitals and not in highlight because its not a method or code in this case. Once you've seen them flag this comment for removal.

Jairam Jidgekar · Accepted Answer · 2022-10-03 10:39:27Z

-1

How about this?

url='https://www.google.com/'

var=url.split('//www.')[1]

domain=var[0:var.index('/')]

print(domain)

answered Oct 3, 2022 at 10:39

Jairam Jidgekar

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1 Comment

AlexK Over a year ago

Read the question carefully. There may be different scenarios, including one where www is not in the input string at all.

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