What is the link shortener algorithm?

Question

Python

Interested in the algorithm. How a shortened link is generated. I'm going to implement in python.

Answer 1

Link beauty question

Answer 2

really, just ask google

Answer 3

Em. generate any short sequence.
save it as a key - the link
does not necessarily generate a short link in the usual way. you can just use randomness.

Answer 4

And you can generate a hash from the URL and cut and remember where necessary.

Answer 5

I am learning python and it was also interesting to write a shortcut, somewhere I found an implementation in php. rewritten for python 3.x.

#!/usr/bin/python
__author__ = 'ZeLib0ba -> http://surin.ru'
import random
from os import path

def urlsh(long_url): # возвращает короткую ссылку вида http://surin.ru/sh/eGbWp
    domain_name='http://surin.ru/'
    phph_file_folder='./sh/'
    if not path.exists('.htaccess'):
        ht_f=open('.htaccess','w')# если нет создаем файл .htaccess
        ht_f.write('RewriteEngine On\nRewriteBase %s\n' % phph_file_folder[1:-1])# записываем в него первые две строчки для переадресации
    else:
        ht_f=open('.htaccess','a')
    link=''.join(random.sample('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz',5)) # генерируем случайную последовательность из 5 символов для нашей короткой ссылки
    data=phph_file_folder + link + '.php'
    php_file=open(data,'w')
    php_file.write('<?php header(\'Location: %s\') ?>\n' % long_url)
    php_file.close()
    ht_f.write('RewriteRule ^%s %s%s' % (link,phph_file_folder[2:],link+'.php\n'))
    ht_f.close()
    return domain_name + phph_file_folder[2:] + link
a=urlsh('http://yandex.ru')
print(a)

PS for the code do not hit, novice pythonist)