File size: 2,378 Bytes
63c5bce | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | from pathlib import Path
import requests
from bs4 import BeautifulSoup
from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry
def build_session(
max_retries: int = 3,
backoff_factor: int = 2,
session: requests.Session = None
) -> requests.Session:
"""
Build a requests session with retries
Args:
max_retries (int, optional): Number of retries. Defaults to 3.
backoff_factor (int, optional): Backoff factor. Defaults to 2.
session (requests.Session, optional): Session object. Defaults to None.
"""
session = session or requests.Session()
adapter = HTTPAdapter(max_retries=Retry(total=max_retries, backoff_factor=backoff_factor))
session.mount("http://", adapter)
session.mount("https://", adapter)
session.headers.update({
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
})
return session
def main():
output_dir = Path(__file__).parent.parent / "raw"
output_dir.mkdir(parents=True, exist_ok=True)
base = 'https://www.hmmt.org'
req_session = build_session()
response = req_session.get(f'{base}/www/archive/problems')
if response.status_code == 200:
soup = BeautifulSoup(response.text, 'html.parser')
tags = soup.find_all('a', href=lambda t: '/archive/' in t if t else False)
urls = []
for tag in tags:
url = tag.get('href')
try:
num = int(url.split('/')[-1])
urls.append(base + url)
except:
pass
for url in urls:
id = url.split('/')[-1]
response = req_session.get(url)
if response.status_code == 200:
soup = BeautifulSoup(response.text, 'html.parser')
tags = soup.find_all('a', href=lambda t: '.pdf' in t if t else False)
links = ['https:' + tag.get('href').lstrip('https:') for tag in tags if 'solution' in tag.text.lower()]
for link in links:
year, month, topic, name = link.split('/')[-4:]
response = req_session.get(link)
(output_dir / f'en-{id}-{year}-{month}-{topic}-{name}').write_bytes(response.content)
else:
print('Failed to reach', url)
if __name__ == '__main__':
main()
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