mirror of
https://github.com/Garmelon/PFERD.git
synced 2023-12-21 10:23:01 +01:00
86 lines
2.5 KiB
Python
86 lines
2.5 KiB
Python
|
# Operating systems Exams
|
||
|
|
|
||
|
|
import getpass
|
||
|
|
import logging
|
||
|
|
import pathlib
|
||
|
|
import re
|
||
|
|
|
||
|
|
import bs4
|
||
|
|
import requests
|
||
|
|
|
||
|
|
from .organizer import Organizer
|
||
|
|
from .utils import stream_to_path, PrettyLogger
|
||
|
|
|
||
|
|
__all__ = ["OsExams"]
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
pretty = PrettyLogger(logger)
|
||
|
|
|
||
|
|
class OsExams:
|
||
|
|
BASE_URL = "https://os.itec.kit.edu/deutsch/1556.php"
|
||
|
|
LINK_RE = re.compile(
|
||
|
|
r"^http://os.itec.kit.edu/downloads_own/sysarch-exam-assandsols"
|
||
|
|
r".*/(.*\.pdf)$"
|
||
|
|
)
|
||
|
|
|
||
|
|
_credentials = None
|
||
|
|
|
||
|
|
def __init__(self, base_path):
|
||
|
|
self.base_path = base_path
|
||
|
|
|
||
|
|
self._session = requests.Session()
|
||
|
|
|
||
|
|
def synchronize(self, to_dir, transform=lambda x: x):
|
||
|
|
pretty.starting_synchronizer(to_dir, "OsExams")
|
||
|
|
|
||
|
|
sync_path = pathlib.Path(self.base_path, to_dir)
|
||
|
|
|
||
|
|
orga = Organizer(self.base_path, sync_path)
|
||
|
|
orga.clean_temp_dir()
|
||
|
|
|
||
|
|
self._crawl(orga, transform)
|
||
|
|
|
||
|
|
orga.clean_sync_dir()
|
||
|
|
orga.clean_temp_dir()
|
||
|
|
|
||
|
|
def _crawl(self, orga, transform):
|
||
|
|
url = self.BASE_URL
|
||
|
|
r = self._session.get(url)
|
||
|
|
soup = bs4.BeautifulSoup(r.text, "html.parser")
|
||
|
|
|
||
|
|
for found in soup.find_all("a", href=self.LINK_RE):
|
||
|
|
url = found["href"]
|
||
|
|
filename = re.match(self.LINK_RE, url).group(1).replace("/", ".")
|
||
|
|
logger.debug(f"Found file {filename} at {url}")
|
||
|
|
|
||
|
|
old_path = pathlib.PurePath(filename)
|
||
|
|
new_path = transform(old_path)
|
||
|
|
if new_path is None:
|
||
|
|
continue
|
||
|
|
logger.debug(f"Transformed from {old_path} to {new_path}")
|
||
|
|
|
||
|
|
temp_path = orga.temp_file()
|
||
|
|
self._download(url, temp_path)
|
||
|
|
orga.add_file(temp_path, new_path)
|
||
|
|
|
||
|
|
def _download(self, url, to_path):
|
||
|
|
while True:
|
||
|
|
username, password = self._get_credentials()
|
||
|
|
with self._session.get(url, stream=True, auth=(username, password)) as r:
|
||
|
|
if r.ok:
|
||
|
|
stream_to_path(r, to_path)
|
||
|
|
return
|
||
|
|
else:
|
||
|
|
print("Incorrect credentials.")
|
||
|
|
self._reset_credentials()
|
||
|
|
|
||
|
|
def _get_credentials(self):
|
||
|
|
if self._credentials is None:
|
||
|
|
print("Please enter OS credentials.")
|
||
|
|
username = getpass.getpass(prompt="Username: ")
|
||
|
|
password = getpass.getpass(prompt="Password: ")
|
||
|
|
self._credentials = (username, password)
|
||
|
|
return self._credentials
|
||
|
|
|
||
|
|
def _reset_credentials(self):
|
||
|
|
self._credentials = None
|