normalurl

Normal URL

Convenient utility to parse and normalize urls.

from normalurl import *

print(parse_url('localhost'))
print(parse_url('localhost:12345'))
print(normalize_url('localhost', scheme='http', port='1122'))
print(parse_normalized_url('localhost:12345', scheme='http', port='1122'))

URL(scheme='', hostname='localhost', port='', path='', query='', fragment='', netloc='localhost', username='', password='')
URL(scheme='', hostname='localhost', port=12345, path='', query='', fragment='', netloc='localhost:12345', username='', password='')
http://localhost:1122
URL(scheme='http', hostname='localhost', port=12345, path='', query='', fragment='', netloc='localhost:12345', username='', password='')

Usage

Normalize URL

Function normalize_url(url: Union[str, URL, ParseResult], *, scheme: str = '', hostname: str = '', port: str = '', path: str = '', query: str = '', fragment: str = '', username: str = '', password: str = '') -> str ensures each element of url has non-empy value otherwise sets default one.

Just do nothing:

print(normalize_url('localhost'))

localhost

Ensure url describes scheme and port. If not persist user http scheme and port 1122.

print(normalize_url('localhost', scheme='http', port='1122'))
print(normalize_url('https://localhost', scheme='http', port='1122'))
print(normalize_url('localhost:12345', scheme='http', port='1122'))
print(normalize_url('https://localhost:12345', scheme='http', port='1122'))

http://localhost:1122
https://localhost:1122
http://localhost:12345
https://localhost:12345

Parse URL

Function parse_url(url: str) -> URL parse url elements in named tuple structure URL. Default value for each element is empty string ''.

Parsed elements are:

• scheme
• hostname
• port
• path
• query
• fragment
• netloc
• username
• password

print(parse_url('localhost'))
print(parse_url('localhost:12345'))
print(parse_url('http://example.org'))
print(parse_url('https://example.org:8080/user/search?name=Bob&age=30#profile'))
print(parse_url('https://admin:[e-mail]:8080/user/search?name=Bob&age=30#profile'))

URL(scheme='', hostname='localhost', port='', path='', query='', fragment='', netloc='localhost', username='', password='')
URL(scheme='', hostname='localhost', port=12345, path='', query='', fragment='', netloc='localhost:12345', username='', password='')
URL(scheme='http', hostname='example.org', port='', path='', query='', fragment='', netloc='example.org', username='', password='')
URL(scheme='https', hostname='example.org', port=8080, path='/user/search', query='name=Bob&age=30', fragment='profile', netloc='example.org:8080', username='', password='')
URL(scheme='https', hostname='example.org', port=8080, path='/user/search', query='name=Bob&age=30', fragment='profile', netloc='admin:[e-mail]:8080', username='admin', password='123')

Parse normalized URL

Function parse_normalized_url(url: Union[str, ParseResult], *, scheme: str = '', hostname: str = '', port: str = '', path: str = '', query: str = '', fragment: str = '', username: str = '', password: str = '') -> URL works exactly like normalize_url + parse_url - normalizes url then parses it.

Ensure url describes scheme and port. If not persist user http scheme and port 1122.

print(parse_normalized_url('localhost', scheme='http', port='1122'))
print(parse_normalized_url('https://localhost', scheme='http', port='1122'))
print(parse_normalized_url('localhost:12345', scheme='http', port='1122'))
print(parse_normalized_url('https://localhost:12345', scheme='http', port='1122'))

URL(scheme='http', hostname='localhost', port=1122, path='', query='', fragment='', netloc='localhost:1122', username='', password='')
URL(scheme='https', hostname='localhost', port=1122, path='', query='', fragment='', netloc='localhost:1122', username='', password='')
URL(scheme='http', hostname='localhost', port=12345, path='', query='', fragment='', netloc='localhost:12345', username='', password='')
URL(scheme='https', hostname='localhost', port=12345, path='', query='', fragment='', netloc='localhost:12345', username='', password='')

Why not just use urllib?

Because urlib does not cover some common edge cases.

Just rewrite the first example with urllib:

from urllib.parse import urlparse

print(urlparse('localhost'))
print(urlparse('localhost:12345'))

ParseResult(scheme='', netloc='', path='localhost', params='', query='', fragment='')
ParseResult(scheme='localhost', netloc='', path='12345', params='', query='', fragment='')

As you can see, urllib considers localhost as path while it is actually hostname. Moreover, <host>:<port> are parsed as scheme (like http) for localhost and path for port which is absolutely wrong.