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# Author: Jiawei Liu
# Date: 2024-12-18
# -----------------------------------------------------------------------------
'''
Download script for Nordic MO
To run:
`python Nordic_MO/download_script/download.py`
'''
import requests
from bs4 import BeautifulSoup
from tqdm import tqdm
from pathlib import Path
from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry
from urllib.parse import urljoin
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():
base_url = "https://www.georgmohr.dk/nmcperm/probl/"
req_session = build_session()
output_dir = Path(__file__).parent.parent / "raw"
output_dir.mkdir(parents=True, exist_ok=True)
resp = req_session.get(base_url)
soup = BeautifulSoup(resp.text, 'html.parser')
sol_list = soup.find_all('a', href=lambda x: x and x.endswith('sol.pdf'))
sol_url = [ele["href"] for ele in sol_list]
for url in tqdm(sol_url):
if (not url.startswith("all")) and int(url.split('/')[0]) <= 2011:
continue
output_file = output_dir / f"en-{'-'.join(url.split('/')).replace('all+sol', '1987-2011-sol')}"
# Check if the file already exists
if output_file.exists():
continue
pdf_resp = req_session.get(urljoin(base_url, url))
if pdf_resp.status_code != 200:
print(f"Failed to download {url}")
continue
output_file.write_bytes(pdf_resp.content)
if __name__ == "__main__":
main()
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