Add basic Ti downloader

This commit is contained in:
Joscha 2019-05-06 11:54:36 +00:00
parent 11b9ff66e4
commit 44b4204517
2 changed files with 112 additions and 0 deletions

View File

@ -3,6 +3,7 @@ import logging
from .ffm import * from .ffm import *
from .ilias import * from .ilias import *
from .norbert import * from .norbert import *
from .ti import *
from .utils import * from .utils import *
__all__ = ["STYLE", "FORMAT", "DATE_FORMAT", "FORMATTER", "enable_logging"] __all__ = ["STYLE", "FORMAT", "DATE_FORMAT", "FORMATTER", "enable_logging"]
@ -10,6 +11,7 @@ __all__ = ["STYLE", "FORMAT", "DATE_FORMAT", "FORMATTER", "enable_logging"]
__all__ += ffm.__all__ __all__ += ffm.__all__
__all__ += ilias.__all__ __all__ += ilias.__all__
__all__ += norbert.__all__ __all__ += norbert.__all__
__all__ += ti.__all__
__all__ += utils.__all__ __all__ += utils.__all__
STYLE = "{" STYLE = "{"

110
PFERD/ti.py Normal file
View File

@ -0,0 +1,110 @@
# Fakultät für Mathematik (FfM)
import getpass
import logging
import pathlib
import re
import bs4
import requests
from .organizer import Organizer
from .utils import stream_to_path
__all__ = ["Ti"]
logger = logging.getLogger(__name__)
class Ti:
BASE_URL = "http://ti.ira.uka.de/"
FILE_RE = re.compile(r"^.+\.pdf$")
def __init__(self, base_path):
self.base_path = base_path
self._session = requests.Session()
self._credentials = None
def synchronize(self, urlpart, to_dir, transform=lambda x: x,
filter=lambda x: True):
logger.info(f" Synchronizing {urlpart} to {to_dir} using the Ti synchronizer.")
sync_path = pathlib.Path(self.base_path, to_dir)
orga = Organizer(self.base_path, sync_path)
orga.clean_temp_dir()
self._reset_credentials()
available = self._find_available(urlpart)
if "Folien" in available:
path = pathlib.PurePath("Folien")
if filter(path):
self._crawl(urlpart + available["Folien"], path, orga,
transform)
else:
logger.info("Skipping Folien/")
if "Blätter" in available:
path = pathlib.PurePath("Blätter")
if filter(path):
self._crawl(urlpart + available["Blätter"], path, orga,
transform)
else:
logger.info("Skipping Blätter/")
orga.clean_sync_dir()
orga.clean_temp_dir()
self._reset_credentials()
def _find_available(self, urlpart):
url = self.BASE_URL + urlpart
r = self._session.get(url)
soup = bs4.BeautifulSoup(r.text, "html.parser")
available = {}
if soup.find(href="./Vorlesung/Vorlesung.php"):
logger.info("Found Folien/")
available["Folien"] = "/Vorlesung/"
if soup.find(href="./Uebungen/Uebungen.php"):
logger.info("Found Blätter/")
available["Blätter"] = "/Uebungen/"
return available
def _crawl(self, urlpart, path, orga, transform):
url = self.BASE_URL + urlpart
r = self._session.get(url)
soup = bs4.BeautifulSoup(r.text, "html.parser")
for filelink in soup.find_all("a", href=self.FILE_RE):
filepath = path / filelink["href"]
fileurl = url + "/" + filelink["href"]
new_path = transform(filepath)
if new_path is None:
continue
logger.debug(f"Transformed from {filepath} to {new_path}")
temp_path = orga.temp_file()
self._download(fileurl, temp_path)
orga.add_file(temp_path, new_path)
def _get_credentials(self):
if self._credentials is None:
print("Please enter Ti 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
def _download(self, url, to_path):
username, password = self._get_credentials()
with self._session.get(url, stream=True, auth=(username, password)) as r:
stream_to_path(r, to_path)