mainchanrandom

#!/usr/bin/python3

# A CGI script that redirects the user to a random Mainchan subchan.
# Note: This script may be slow and wasteful of data because the subchan
#       list is scraped each time this script runs.

import random
import requests
from bs4 import BeautifulSoup

def getSubList():
    sublist = []

    headers = {'User-Agent': 'mainchanrandom scraper'}

    n = 1
    while n < 10:   # the n < 10 check is for the loop to not iterate forever just incase the 'no links in table' check will fail
        url = f'https://mainchan.com/subchan-list?page={n}'
        sublist_page = requests.get(url, headers=headers)

        soup = BeautifulSoup(sublist_page.content, "html.parser")
        sublist_table = soup.find("table", class_="sublist-table")  # finds first occurence of table tag
        sublinks = sublist_table.find_all("a")
        if not sublinks:    # if there are no links in the table, then we have reached the end of the pages
            break
        for link in sublinks:
            sublist.append(link["href"])

        n = n + 1

    return sublist

sublist = getSubList()
randomsub_url = sublist[random.randint(0, len(sublist)-1)]

print("Content-Type: text/html")
print(f"Location: {randomsub_url}")
print("\r\n\r\n", end='')
print("<html>")
print("  <head>")
print(f"   <meta http-equiv='refresh' content='0;url={randomsub_url}'/>")
print("    <title>Redirecting...</title>")
print("  </head>")
print("  <body>")
print("    <center>")
print(f"     <p>Redirecting... <br><a href={randomsub_url}>click here</a> if it doesn't work</p>")
print("    </center>")
print("  </body>")
print("</html>")