TODO

.gitignore

@@ -2,8 +2,6 @@
 /.venv/
 /PFERD.egg-info/
 __pycache__/
-/.vscode/
-/.idea/
 
 # pyinstaller
 /pferd.spec

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+    "files.insertFinalNewline": true,
+    "files.trimFinalNewlines": true,
+    "python.formatting.provider": "autopep8",
+    "python.linting.enabled": true,
+    "python.linting.flake8Enabled": true,
+    "python.linting.mypyEnabled": true,
+}

CHANGELOG.md

@@ -22,31 +22,10 @@ ambiguous situations.
 
 ## Unreleased
 
-### Fixed
-- Video name deduplication
-
-## 3.5.0 - 2023-09-13
-
-### Added
-- `no-delete-prompt-override` conflict resolution strategy
-- Support for ILIAS learning modules
-- `show_not_deleted` option to stop printing the "Not Deleted" status or report
-  message. This combines nicely with the `no-delete-prompt-override` strategy,
-  causing PFERD to mostly ignore local-only files.
-- Support for mediacast video listings
-- Crawling of files in info tab
-
-### Changed
-- Remove size suffix for files in content pages
-
 ### Fixed
 - Crawling of courses with the timeline view as the default tab
 - Crawling of file and custom opencast cards
 - Crawling of button cards without descriptions
-- Abort crawling when encountering an unexpected ilias root page redirect
-- Sanitize ascii control characters on Windows
-- Crawling of paginated past meetings
-- Ignore SCORM learning modules
 
 ## 3.4.3 - 2022-11-29
 

CONFIG.md

@@ -26,9 +26,6 @@ default values for the other sections.
   `Added ...`) while running a crawler. (Default: `yes`)
 - `report`: Whether PFERD should print a report of added, changed and deleted
    local files for all crawlers before exiting. (Default: `yes`)
-- `show_not_deleted`: Whether PFERD should print messages in status and report
-   when a local-only file wasn't deleted. Combines nicely with the
-   `no-delete-prompt-override` conflict resolution strategy.
 - `share_cookies`: Whether crawlers should share cookies where applicable. For
   example, some crawlers share cookies if they crawl the same website using the
   same account. (Default: `yes`)
@@ -78,9 +75,6 @@ common to all crawlers:
       using `prompt` and always choosing "yes".
     - `no-delete`: Never delete local files, but overwrite local files if the
       remote file is different.
-    - `no-delete-prompt-overwrite`: Never delete local files, but prompt to
-      overwrite local files if the remote file is different. Combines nicely
-      with the `show_not_deleted` option.
 - `transform`: Rules for renaming and excluding certain files and directories.
   For more details, see [this section](#transformation-rules). (Default: empty)
 - `tasks`: The maximum number of concurrent tasks (such as crawling or

LICENSE

@@ -1,6 +1,5 @@
 Copyright 2019-2021 Garmelon, I-Al-Istannen, danstooamerican, pavelzw,
-                    TheChristophe, Scriptim, thelukasprobst, Toorero,
-                    Mr-Pine
+                    TheChristophe, Scriptim, thelukasprobst, Toorero
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in

PFERD/__main__.py

@@ -47,8 +47,6 @@ def configure_logging_from_args(args: argparse.Namespace) -> None:
         log.output_explain = args.explain
     if args.status is not None:
         log.output_status = args.status
-    if args.show_not_deleted is not None:
-        log.output_not_deleted = args.show_not_deleted
     if args.report is not None:
         log.output_report = args.report
 
@@ -74,8 +72,6 @@ def configure_logging_from_config(args: argparse.Namespace, config: Config) -> N
             log.output_status = config.default_section.status()
         if args.report is None:
             log.output_report = config.default_section.report()
-        if args.show_not_deleted is None:
-            log.output_not_deleted = config.default_section.show_not_deleted()
     except ConfigOptionError as e:
         log.error(str(e))
         sys.exit(1)

PFERD/cli/parser.py

@@ -215,11 +215,6 @@ PARSER.add_argument(
     action=BooleanOptionalAction,
     help="whether crawlers should share cookies where applicable"
 )
-PARSER.add_argument(
-    "--show-not-deleted",
-    action=BooleanOptionalAction,
-    help="print messages in status and report when PFERD did not delete a local only file"
-)
 
 
 def load_default_section(
@@ -238,8 +233,6 @@ def load_default_section(
         section["report"] = "yes" if args.report else "no"
     if args.share_cookies is not None:
         section["share_cookies"] = "yes" if args.share_cookies else "no"
-    if args.show_not_deleted is not None:
-        section["show_not_deleted"] = "yes" if args.show_not_deleted else "no"
 
 
 SUBPARSERS = PARSER.add_subparsers(title="crawlers")

PFERD/config.py

@@ -82,9 +82,6 @@ class DefaultSection(Section):
     def report(self) -> bool:
         return self.s.getboolean("report", fallback=True)
 
-    def show_not_deleted(self) -> bool:
-        return self.s.getboolean("show_not_deleted", fallback=True)
-
     def share_cookies(self) -> bool:
         return self.s.getboolean("share_cookies", fallback=True)
 

PFERD/crawl/crawler.py

@@ -9,7 +9,6 @@ from typing import Any, Callable, Dict, List, Optional, Sequence, Set, Tuple, Ty
 from ..auth import Authenticator
 from ..config import Config, Section
 from ..deduplicator import Deduplicator
-from ..limiter import Limiter
 from ..logging import ProgressBar, log
 from ..output_dir import FileSink, FileSinkToken, OnConflict, OutputDirectory, OutputDirError, Redownload
 from ..report import MarkConflictError, MarkDuplicateError, Report
@@ -98,10 +97,9 @@ def anoncritical(f: AWrapped) -> AWrapped:
 
 
 class CrawlToken(ReusableAsyncContextManager[ProgressBar]):
-    def __init__(self, limiter: Limiter, path: PurePath):
+    def __init__(self, path: PurePath):
         super().__init__()
 
-        self._limiter = limiter
         self._path = path
 
     @property
@@ -110,17 +108,15 @@ class CrawlToken(ReusableAsyncContextManager[ProgressBar]):
 
     async def _on_aenter(self) -> ProgressBar:
         self._stack.callback(lambda: log.status("[bold cyan]", "Crawled", fmt_path(self._path)))
-        await self._stack.enter_async_context(self._limiter.limit_crawl())
         bar = self._stack.enter_context(log.crawl_bar("[bold bright_cyan]", "Crawling", fmt_path(self._path)))
 
         return bar
 
 
 class DownloadToken(ReusableAsyncContextManager[Tuple[ProgressBar, FileSink]]):
-    def __init__(self, limiter: Limiter, fs_token: FileSinkToken, path: PurePath):
+    def __init__(self, fs_token: FileSinkToken, path: PurePath):
         super().__init__()
 
-        self._limiter = limiter
         self._fs_token = fs_token
         self._path = path
 
@@ -129,7 +125,6 @@ class DownloadToken(ReusableAsyncContextManager[Tuple[ProgressBar, FileSink]]):
         return self._path
 
     async def _on_aenter(self) -> Tuple[ProgressBar, FileSink]:
-        await self._stack.enter_async_context(self._limiter.limit_download())
         sink = await self._stack.enter_async_context(self._fs_token)
         # The "Downloaded ..." message is printed in the output dir, not here
         bar = self._stack.enter_context(log.download_bar("[bold bright_cyan]", "Downloading",
@@ -235,12 +230,6 @@ class Crawler(ABC):
         self.name = name
         self.error_free = True
 
-        self._limiter = Limiter(
-            task_limit=section.tasks(),
-            download_limit=section.downloads(),
-            task_delay=section.task_delay(),
-        )
-
         self._deduplicator = Deduplicator(section.windows_paths())
         self._transformer = Transformer(section.transform())
 
@@ -288,7 +277,7 @@ class Crawler(ABC):
             return None
 
         log.explain("Answer: Yes")
-        return CrawlToken(self._limiter, path)
+        return CrawlToken(path)
 
     async def download(
             self,
@@ -313,7 +302,7 @@ class Crawler(ABC):
             return None
 
         log.explain("Answer: Yes")
-        return DownloadToken(self._limiter, fs_token, path)
+        return DownloadToken(fs_token, path)
 
     async def _cleanup(self) -> None:
         log.explain_topic("Decision: Clean up files")

PFERD/crawl/http_crawler.py

@@ -1,12 +1,9 @@
 import asyncio
-import http.cookies
-import ssl
+from http.cookiejar import LWPCookieJar
 from pathlib import Path, PurePath
-from typing import Any, Dict, List, Optional
+from typing import Dict, List, Optional
 
-import aiohttp
-import certifi
-from aiohttp.client import ClientTimeout
+import requests
 
 from ..auth import Authenticator
 from ..config import Config
@@ -35,9 +32,9 @@ class HttpCrawler(Crawler):
 
         self._authentication_id = 0
         self._authentication_lock = asyncio.Lock()
-        self._request_count = 0
-        self._http_timeout = section.http_timeout()
+        self._http_timeout = section.http_timeout()  # TODO Use or remove
 
+        self._cookie_jar = LWPCookieJar()
         self._cookie_jar_path = self._output_dir.resolve(self.COOKIE_FILE)
         self._shared_cookie_jar_paths: Optional[List[Path]] = None
         self._shared_auth = shared_auth
@@ -57,7 +54,6 @@ class HttpCrawler(Crawler):
         # This should reduce the amount of requests we make: If an authentication is in progress
         # all future requests wait for authentication to complete.
         async with self._authentication_lock:
-            self._request_count += 1
             return self._authentication_id
 
     async def authenticate(self, caller_auth_id: int) -> None:
@@ -106,32 +102,13 @@ class HttpCrawler(Crawler):
 
         self._shared_cookie_jar_paths.append(self._cookie_jar_path)
 
-    def _load_cookies_from_file(self, path: Path) -> None:
-        jar: Any = http.cookies.SimpleCookie()
-        with open(path, encoding="utf-8") as f:
-            for i, line in enumerate(f):
-                # Names of headers are case insensitive
-                if line[:11].lower() == "set-cookie:":
-                    jar.load(line[11:])
-                else:
-                    log.explain(f"Line {i} doesn't start with 'Set-Cookie:', ignoring it")
-        self._cookie_jar.update_cookies(jar)
-
-    def _save_cookies_to_file(self, path: Path) -> None:
-        jar: Any = http.cookies.SimpleCookie()
-        for morsel in self._cookie_jar:
-            jar[morsel.key] = morsel
-        with open(path, "w", encoding="utf-8") as f:
-            f.write(jar.output(sep="\n"))
-            f.write("\n")  # A trailing newline is just common courtesy
-
     def _load_cookies(self) -> None:
         log.explain_topic("Loading cookies")
 
         cookie_jar_path: Optional[Path] = None
 
         if self._shared_cookie_jar_paths is None:
-            log.explain("Not sharing any cookies")
+            log.explain("Not sharing cookies")
             cookie_jar_path = self._cookie_jar_path
         else:
             log.explain("Sharing cookies")
@@ -154,46 +131,38 @@ class HttpCrawler(Crawler):
 
         log.explain(f"Loading cookies from {fmt_real_path(cookie_jar_path)}")
         try:
-            self._load_cookies_from_file(cookie_jar_path)
+            self._cookie_jar.load(filename=str(cookie_jar_path))
         except Exception as e:
-            log.explain("Failed to load cookies")
-            log.explain(str(e))
+            log.explain(f"Failed to load cookies: {e}")
+            log.explain("Proceeding without cookies")
 
     def _save_cookies(self) -> None:
         log.explain_topic("Saving cookies")
 
         try:
             log.explain(f"Saving cookies to {fmt_real_path(self._cookie_jar_path)}")
-            self._save_cookies_to_file(self._cookie_jar_path)
+            self._cookie_jar.save(filename=str(self._cookie_jar_path))
         except Exception as e:
-            log.warn(f"Failed to save cookies to {fmt_real_path(self._cookie_jar_path)}")
-            log.warn(str(e))
+            log.warn(f"Failed to save cookies: {e}")
 
     async def run(self) -> None:
         self._request_count = 0
-        self._cookie_jar = aiohttp.CookieJar()
         self._load_cookies()
 
-        async with aiohttp.ClientSession(
-                headers={"User-Agent": f"{NAME}/{VERSION}"},
-                cookie_jar=self._cookie_jar,
-                connector=aiohttp.TCPConnector(ssl=ssl.create_default_context(cafile=certifi.where())),
-                timeout=ClientTimeout(
-                    # 30 minutes. No download in the history of downloads was longer than 30 minutes.
-                    # This is enough to transfer a 600 MB file over a 3 Mib/s connection.
-                    # Allowing an arbitrary value could be annoying for overnight batch jobs
-                    total=15 * 60,
-                    connect=self._http_timeout,
-                    sock_connect=self._http_timeout,
-                    sock_read=self._http_timeout,
-                )
-        ) as session:
-            self.session = session
+        self.session = requests.Session()
+        self.session.headers["User-Agent"] = f"{NAME}/{VERSION}"
+
+        # From the request docs: "All requests code should work out of the box
+        # with externally provided instances of CookieJar, e.g. LWPCookieJar and
+        # FileCookieJar."
+        # https://requests.readthedocs.io/en/latest/api/#requests.cookies.RequestsCookieJar
+        self.session.cookies = self._cookie_jar  # type: ignore
+
+        with self.session:
             try:
                 await super().run()
             finally:
                 del self.session
-        log.explain_topic(f"Total amount of HTTP requests: {self._request_count}")
 
         # They are saved in authenticate, but a final save won't hurt
         self._save_cookies()

PFERD/crawl/ilias/file_templates.py

@@ -1,10 +1,6 @@
 from enum import Enum
 from typing import Optional
 
-import bs4
-
-from PFERD.utils import soupify
-
 _link_template_plain = "{{link}}"
 _link_template_fancy = """
 <!DOCTYPE html>
@@ -98,71 +94,6 @@ _link_template_internet_shortcut = """
 URL={{link}}
 """.strip()
 
-_learning_module_template = """
-<!DOCTYPE html>
-<html lang="en">
-    <head>
-        <meta charset="UTF-8">
-        <title>{{name}}</title>
-    </head>
-
-    <style>
-    * {
-        box-sizing: border-box;
-    }
-    .center-flex {
-        display: flex;
-        align-items: center;
-        justify-content: center;
-    }
-    .nav {
-        display: flex;
-        justify-content: space-between;
-    }
-    </style>
-    <body class="center-flex">
-{{body}}
-    </body>
-</html>
-"""
-
-
-def learning_module_template(body: bs4.Tag, name: str, prev: Optional[str], next: Optional[str]) -> str:
-    # Seems to be comments, ignore those.
-    for elem in body.select(".il-copg-mob-fullscreen-modal"):
-        elem.decompose()
-
-    nav_template = """
-        <div class="nav">
-            {{left}}
-            {{right}}
-        </div>
-    """
-    if prev and body.select_one(".ilc_page_lnav_LeftNavigation"):
-        text = body.select_one(".ilc_page_lnav_LeftNavigation").getText().strip()
-        left = f'<a href="{prev}">{text}</a>'
-    else:
-        left = "<span></span>"
-
-    if next and body.select_one(".ilc_page_rnav_RightNavigation"):
-        text = body.select_one(".ilc_page_rnav_RightNavigation").getText().strip()
-        right = f'<a href="{next}">{text}</a>'
-    else:
-        right = "<span></span>"
-
-    if top_nav := body.select_one(".ilc_page_tnav_TopNavigation"):
-        top_nav.replace_with(
-            soupify(nav_template.replace("{{left}}", left).replace("{{right}}", right).encode())
-        )
-
-    if bot_nav := body.select_one(".ilc_page_bnav_BottomNavigation"):
-        bot_nav.replace_with(soupify(nav_template.replace(
-            "{{left}}", left).replace("{{right}}", right).encode())
-        )
-
-    body = body.prettify()
-    return _learning_module_template.replace("{{body}}", body).replace("{{name}}", name)
-
 
 class Links(Enum):
     IGNORE = "ignore"
@@ -171,24 +102,24 @@ class Links(Enum):
     INTERNET_SHORTCUT = "internet-shortcut"
 
     def template(self) -> Optional[str]:
-        if self == Links.FANCY:
+        if self == self.FANCY:
             return _link_template_fancy
-        elif self == Links.PLAINTEXT:
+        elif self == self.PLAINTEXT:
             return _link_template_plain
-        elif self == Links.INTERNET_SHORTCUT:
+        elif self == self.INTERNET_SHORTCUT:
             return _link_template_internet_shortcut
-        elif self == Links.IGNORE:
+        elif self == self.IGNORE:
             return None
         raise ValueError("Missing switch case")
 
     def extension(self) -> Optional[str]:
-        if self == Links.FANCY:
+        if self == self.FANCY:
             return ".html"
-        elif self == Links.PLAINTEXT:
+        elif self == self.PLAINTEXT:
             return ".txt"
-        elif self == Links.INTERNET_SHORTCUT:
+        elif self == self.INTERNET_SHORTCUT:
             return ".url"
-        elif self == Links.IGNORE:
+        elif self == self.IGNORE:
             return None
         raise ValueError("Missing switch case")
 

PFERD/crawl/ilias/ilias_html_cleaner.py

@@ -82,7 +82,7 @@ def clean(soup: BeautifulSoup) -> BeautifulSoup:
             dummy.decompose()
         if len(children) > 1:
             continue
-        if isinstance(type(children[0]), Comment):
+        if type(children[0]) == Comment:
             dummy.decompose()
 
     for hrule_imposter in soup.find_all(class_="ilc_section_Separator"):

PFERD/crawl/ilias/kit_ilias_html.py

@@ -3,7 +3,7 @@ import re
 from dataclasses import dataclass
 from datetime import date, datetime, timedelta
 from enum import Enum
-from typing import Dict, List, Optional, Union, cast
+from typing import Dict, List, Optional, Union
 from urllib.parse import urljoin, urlparse
 
 from bs4 import BeautifulSoup, Tag
@@ -22,18 +22,13 @@ class IliasElementType(Enum):
     FOLDER = "folder"
     FORUM = "forum"
     LINK = "link"
-    INFO_TAB = "info_tab"
-    LEARNING_MODULE = "learning_module"
     BOOKING = "booking"
     MEETING = "meeting"
     SURVEY = "survey"
-    SCORM_LEARNING_MODULE = "scorm_learning_module"
-    MEDIACAST_VIDEO_FOLDER = "mediacast_video_folder"
-    MEDIACAST_VIDEO = "mediacast_video"
-    OPENCAST_VIDEO = "opencast_video"
-    OPENCAST_VIDEO_PLAYER = "opencast_video_player"
-    OPENCAST_VIDEO_FOLDER = "opencast_video_folder"
-    OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED = "opencast_video_folder_maybe_paginated"
+    VIDEO = "video"
+    VIDEO_PLAYER = "video_player"
+    VIDEO_FOLDER = "video_folder"
+    VIDEO_FOLDER_MAYBE_PAGINATED = "video_folder_maybe_paginated"
 
 
 @dataclass
@@ -49,8 +44,7 @@ class IliasPageElement:
             r"eid=(?P<id>[0-9a-z\-]+)",
             r"file_(?P<id>\d+)",
             r"ref_id=(?P<id>\d+)",
-            r"target=[a-z]+_(?P<id>\d+)",
-            r"mm_(?P<id>\d+)"
+            r"target=[a-z]+_(?P<id>\d+)"
         ]
 
         for regex in regexes:
@@ -77,14 +71,6 @@ class IliasForumThread:
     mtime: Optional[datetime]
 
 
-@dataclass
-class IliasLearningModulePage:
-    title: str
-    content: Tag
-    next_url: Optional[str]
-    previous_url: Optional[str]
-
-
 class IliasPage:
 
     def __init__(self, soup: BeautifulSoup, _page_url: str, source_element: Optional[IliasPageElement]):
@@ -93,16 +79,6 @@ class IliasPage:
         self._page_type = source_element.type if source_element else None
         self._source_name = source_element.name if source_element else ""
 
-    @staticmethod
-    def is_root_page(soup: BeautifulSoup) -> bool:
-        permalink = soup.find(id="current_perma_link")
-        if permalink is None:
-            return False
-        value = permalink.attrs.get("value")
-        if value is None:
-            return False
-        return "goto.php?target=root_" in value
-
     def get_child_elements(self) -> List[IliasPageElement]:
         """
         Return all child page elements you can find here.
@@ -110,9 +86,9 @@ class IliasPage:
         if self._is_video_player():
             log.explain("Page is a video player, extracting URL")
             return self._player_to_video()
-        if self._is_opencast_video_listing():
-            log.explain("Page is an opencast video listing, searching for elements")
-            return self._find_opencast_video_entries()
+        if self._is_video_listing():
+            log.explain("Page is a video listing, searching for elements")
+            return self._find_video_entries()
         if self._is_exercise_file():
             log.explain("Page is an exercise, searching for elements")
             return self._find_exercise_entries()
@@ -122,25 +98,9 @@ class IliasPage:
         if self._is_content_page():
             log.explain("Page is a content page, searching for elements")
             return self._find_copa_entries()
-        if self._is_info_tab():
-            log.explain("Page is info tab, searching for elements")
-            return self._find_info_tab_entries()
         log.explain("Page is a normal folder, searching for elements")
         return self._find_normal_entries()
 
-    def get_info_tab(self) -> Optional[IliasPageElement]:
-        tab: Optional[Tag] = self._soup.find(
-            name="a",
-            attrs={"href": lambda x: x and "cmdClass=ilinfoscreengui" in x}
-        )
-        if tab is not None:
-            return IliasPageElement(
-                IliasElementType.INFO_TAB,
-                self._abs_url_from_link(tab),
-                "infos"
-            )
-        return None
-
     def get_description(self) -> Optional[BeautifulSoup]:
         def is_interesting_class(name: str) -> bool:
             return name in ["ilCOPageSection", "ilc_Paragraph", "ilc_va_ihcap_VAccordIHeadCap"]
@@ -166,34 +126,6 @@ class IliasPage:
 
         return BeautifulSoup(raw_html, "html.parser")
 
-    def get_learning_module_data(self) -> Optional[IliasLearningModulePage]:
-        if not self._is_learning_module_page():
-            return None
-        content = self._soup.select_one("#ilLMPageContent")
-        title = self._soup.select_one(".ilc_page_title_PageTitle").getText().strip()
-        return IliasLearningModulePage(
-            title=title,
-            content=content,
-            next_url=self._find_learning_module_next(),
-            previous_url=self._find_learning_module_prev()
-        )
-
-    def _find_learning_module_next(self) -> Optional[str]:
-        for link in self._soup.select("a.ilc_page_rnavlink_RightNavigationLink"):
-            url = self._abs_url_from_link(link)
-            if "baseClass=ilLMPresentationGUI" not in url:
-                continue
-            return url
-        return None
-
-    def _find_learning_module_prev(self) -> Optional[str]:
-        for link in self._soup.select("a.ilc_page_lnavlink_LeftNavigationLink"):
-            url = self._abs_url_from_link(link)
-            if "baseClass=ilLMPresentationGUI" not in url:
-                continue
-            return url
-        return None
-
     def get_download_forum_data(self) -> Optional[IliasDownloadForumData]:
         form = self._soup.find("form", attrs={"action": lambda x: x and "fallbackCmd=showThreads" in x})
         if not form:
@@ -220,18 +152,14 @@ class IliasPage:
         if self._is_ilias_opencast_embedding():
             log.explain("Unwrapping opencast embedding")
             return self.get_child_elements()[0]
-        if self._page_type == IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED:
+        if self._page_type == IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED:
             log.explain("Unwrapping video pagination")
-            return self._find_opencast_video_entries_paginated()[0]
+            return self._find_video_entries_paginated()[0]
         if self._contains_collapsed_future_meetings():
             log.explain("Requesting *all* future meetings")
             return self._uncollapse_future_meetings_url()
         if not self._is_content_tab_selected():
-            if self._page_type != IliasElementType.INFO_TAB:
-                log.explain("Selecting content tab")
             return self._select_content_page_url()
-            else:
-                log.explain("Crawling info tab, skipping content select")
         return None
 
     def _is_forum_page(self) -> bool:
@@ -244,7 +172,7 @@ class IliasPage:
     def _is_video_player(self) -> bool:
         return "paella_config_file" in str(self._soup)
 
-    def _is_opencast_video_listing(self) -> bool:
+    def _is_video_listing(self) -> bool:
         if self._is_ilias_opencast_embedding():
             return True
 
@@ -284,20 +212,11 @@ class IliasPage:
             return False
         return "target=copa_" in link.get("value")
 
-    def _is_learning_module_page(self) -> bool:
-        link = self._soup.find(id="current_perma_link")
-        if not link:
-            return False
-        return "target=pg_" in link.get("value")
-
     def _contains_collapsed_future_meetings(self) -> bool:
         return self._uncollapse_future_meetings_url() is not None
 
     def _uncollapse_future_meetings_url(self) -> Optional[IliasPageElement]:
-        element = self._soup.find(
-            "a",
-            attrs={"href": lambda x: x and ("crs_next_sess=1" in x or "crs_prev_sess=1" in x)}
-        )
+        element = self._soup.find("a", attrs={"href": lambda x: x and "crs_next_sess=1" in x})
         if not element:
             return None
         link = self._abs_url_from_link(element)
@@ -306,10 +225,6 @@ class IliasPage:
     def _is_content_tab_selected(self) -> bool:
         return self._select_content_page_url() is None
 
-    def _is_info_tab(self) -> bool:
-        might_be_info = self._soup.find("form", attrs={"name": lambda x: x == "formInfoScreen"}) is not None
-        return self._page_type == IliasElementType.INFO_TAB and might_be_info
-
     def _select_content_page_url(self) -> Optional[IliasPageElement]:
         tab = self._soup.find(
             id="tab_view_content",
@@ -351,14 +266,14 @@ class IliasPage:
         # and just fetch the lone video url!
         if len(streams) == 1:
             video_url = streams[0]["sources"]["mp4"][0]["src"]
-            return [IliasPageElement(IliasElementType.OPENCAST_VIDEO, video_url, self._source_name)]
+            return [IliasPageElement(IliasElementType.VIDEO, video_url, self._source_name)]
 
         log.explain(f"Found multiple videos for stream at {self._source_name}")
         items = []
         for stream in sorted(streams, key=lambda stream: stream["content"]):
             full_name = f"{self._source_name.replace('.mp4', '')} ({stream['content']}).mp4"
             video_url = stream["sources"]["mp4"][0]["src"]
-            items.append(IliasPageElement(IliasElementType.OPENCAST_VIDEO, video_url, full_name))
+            items.append(IliasPageElement(IliasElementType.VIDEO, video_url, full_name))
 
         return items
 
@@ -406,8 +321,7 @@ class IliasPage:
 
         for link in links:
             url = self._abs_url_from_link(link)
-            name = re.sub(r"\([\d,.]+ [MK]B\)", "", link.getText()).strip().replace("\t", "")
-            name = _sanitize_path_name(name)
+            name = _sanitize_path_name(link.getText().strip().replace("\t", ""))
 
             if "file_id" not in url:
                 _unexpected_html_warning()
@@ -418,24 +332,7 @@ class IliasPage:
 
         return items
 
-    def _find_info_tab_entries(self) -> List[IliasPageElement]:
-        items = []
-        links: List[Tag] = self._soup.select("a.il_ContainerItemCommand")
-
-        for link in links:
-            if "cmdClass=ilobjcoursegui" not in link["href"]:
-                continue
-            if "cmd=sendfile" not in link["href"]:
-                continue
-            items.append(IliasPageElement(
-                IliasElementType.FILE,
-                self._abs_url_from_link(link),
-                _sanitize_path_name(link.getText())
-            ))
-
-        return items
-
-    def _find_opencast_video_entries(self) -> List[IliasPageElement]:
+    def _find_video_entries(self) -> List[IliasPageElement]:
         # ILIAS has three stages for video pages
         # 1. The initial dummy page without any videos. This page contains the link to the listing
         # 2. The video listing which might be paginated
@@ -455,27 +352,27 @@ class IliasPage:
             query_params = {"limit": "800", "cmd": "asyncGetTableGUI", "cmdMode": "asynch"}
             url = url_set_query_params(url, query_params)
             log.explain("Found ILIAS video frame page, fetching actual content next")
-            return [IliasPageElement(IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED, url, "")]
+            return [IliasPageElement(IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED, url, "")]
 
         is_paginated = self._soup.find(id=re.compile(r"tab_page_sel.+")) is not None
 
-        if is_paginated and not self._page_type == IliasElementType.OPENCAST_VIDEO_FOLDER:
+        if is_paginated and not self._page_type == IliasElementType.VIDEO_FOLDER:
             # We are in stage 2 - try to break pagination
-            return self._find_opencast_video_entries_paginated()
+            return self._find_video_entries_paginated()
 
-        return self._find_opencast_video_entries_no_paging()
+        return self._find_video_entries_no_paging()
 
-    def _find_opencast_video_entries_paginated(self) -> List[IliasPageElement]:
+    def _find_video_entries_paginated(self) -> List[IliasPageElement]:
         table_element: Tag = self._soup.find(name="table", id=re.compile(r"tbl_xoct_.+"))
 
         if table_element is None:
             log.warn("Couldn't increase elements per page (table not found). I might miss elements.")
-            return self._find_opencast_video_entries_no_paging()
+            return self._find_video_entries_no_paging()
 
         id_match = re.match(r"tbl_xoct_(.+)", table_element.attrs["id"])
         if id_match is None:
             log.warn("Couldn't increase elements per page (table id not found). I might miss elements.")
-            return self._find_opencast_video_entries_no_paging()
+            return self._find_video_entries_no_paging()
 
         table_id = id_match.group(1)
 
@@ -484,9 +381,9 @@ class IliasPage:
         url = url_set_query_params(self._page_url, query_params)
 
         log.explain("Disabled pagination, retrying folder as a new entry")
-        return [IliasPageElement(IliasElementType.OPENCAST_VIDEO_FOLDER, url, "")]
+        return [IliasPageElement(IliasElementType.VIDEO_FOLDER, url, "")]
 
-    def _find_opencast_video_entries_no_paging(self) -> List[IliasPageElement]:
+    def _find_video_entries_no_paging(self) -> List[IliasPageElement]:
         """
         Crawls the "second stage" video page. This page contains the actual video urls.
         """
@@ -498,11 +395,11 @@ class IliasPage:
         results: List[IliasPageElement] = []
 
         for link in video_links:
-            results.append(self._listed_opencast_video_to_element(link))
+            results.append(self._listed_video_to_element(link))
 
         return results
 
-    def _listed_opencast_video_to_element(self, link: Tag) -> IliasPageElement:
+    def _listed_video_to_element(self, link: Tag) -> IliasPageElement:
         # The link is part of a table with multiple columns, describing metadata.
         # 6th or 7th child (1 indexed) is the modification time string. Try to find it
         # by parsing backwards from the end and finding something that looks like a date
@@ -529,9 +426,7 @@ class IliasPage:
         video_url = self._abs_url_from_link(link)
 
         log.explain(f"Found video {video_name!r} at {video_url}")
-        return IliasPageElement(
-            IliasElementType.OPENCAST_VIDEO_PLAYER, video_url, video_name, modification_time
-        )
+        return IliasPageElement(IliasElementType.VIDEO_PLAYER, video_url, video_name, modification_time)
 
     def _find_exercise_entries(self) -> List[IliasPageElement]:
         if self._soup.find(id="tab_submission"):
@@ -674,48 +569,9 @@ class IliasPage:
             result.append(IliasPageElement(element_type, abs_url, element_name, description=description))
 
         result += self._find_cards()
-        result += self._find_mediacast_videos()
 
         return result
 
-    def _find_mediacast_videos(self) -> List[IliasPageElement]:
-        videos: List[IliasPageElement] = []
-
-        for elem in cast(List[Tag], self._soup.select(".ilPlayerPreviewOverlayOuter")):
-            element_name = _sanitize_path_name(
-                elem.select_one(".ilPlayerPreviewDescription").getText().strip()
-            )
-            if not element_name.endswith(".mp4"):
-                # just to make sure it has some kinda-alrightish ending
-                element_name = element_name + ".mp4"
-            video_element = elem.find(name="video")
-            if not video_element:
-                _unexpected_html_warning()
-                log.warn_contd(f"No <video> element found for mediacast video '{element_name}'")
-                continue
-
-            videos.append(IliasPageElement(
-                type=IliasElementType.MEDIACAST_VIDEO,
-                url=self._abs_url_from_relative(video_element.get("src")),
-                name=element_name,
-                mtime=self._find_mediacast_video_mtime(elem.findParent(name="td"))
-            ))
-
-        return videos
-
-    def _find_mediacast_video_mtime(self, enclosing_td: Tag) -> Optional[datetime]:
-        description_td: Tag = enclosing_td.findPreviousSibling("td")
-        if not description_td:
-            return None
-
-        meta_tag: Tag = description_td.find_all("p")[-1]
-        if not meta_tag:
-            return None
-
-        updated_str = meta_tag.getText().strip().replace("\n", " ")
-        updated_str = re.sub(".+?: ", "", updated_str)
-        return demangle_date(updated_str)
-
     def _is_in_expanded_meeting(self, tag: Tag) -> bool:
         """
         Returns whether a file is part of an expanded meeting.
@@ -887,7 +743,7 @@ class IliasPage:
         icon: Tag = card_root.select_one(".il-card-repository-head .icon")
 
         if "opencast" in icon["class"] or "xoct" in icon["class"]:
-            return IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED
+            return IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED
         if "exc" in icon["class"]:
             return IliasElementType.EXERCISE
         if "webr" in icon["class"]:
@@ -908,8 +764,6 @@ class IliasPage:
             return IliasElementType.SURVEY
         if "file" in icon["class"]:
             return IliasElementType.FILE
-        if "mcst" in icon["class"]:
-            return IliasElementType.MEDIACAST_VIDEO_FOLDER
 
         _unexpected_html_warning()
         log.warn_contd(f"Could not extract type from {icon} for card title {card_title}")
@@ -948,15 +802,6 @@ class IliasPage:
         if "cmdClass=ilobjtestgui" in parsed_url.query:
             return IliasElementType.TEST
 
-        if "baseClass=ilLMPresentationGUI" in parsed_url.query:
-            return IliasElementType.LEARNING_MODULE
-
-        if "baseClass=ilMediaCastHandlerGUI" in parsed_url.query:
-            return IliasElementType.MEDIACAST_VIDEO_FOLDER
-
-        if "baseClass=ilSAHSPresentationGUI" in parsed_url.query:
-            return IliasElementType.SCORM_LEARNING_MODULE
-
         # Booking and Meeting can not be detected based on the link. They do have a ref_id though, so
         # try to guess it from the image.
 
@@ -998,11 +843,7 @@ class IliasPage:
         if img_tag is None:
             img_tag = found_parent.select_one("img.icon")
 
-        is_session_expansion_button = found_parent.find(
-            "a",
-            attrs={"href": lambda x: x and ("crs_next_sess=" in x or "crs_prev_sess=" in x)}
-        )
-        if img_tag is None and is_session_expansion_button:
+        if img_tag is None and found_parent.find("a", attrs={"href": lambda x: x and "crs_next_sess=" in x}):
             log.explain("Found session expansion button, skipping it as it has no content")
             return None
 
@@ -1012,7 +853,7 @@ class IliasPage:
             return None
 
         if "opencast" in str(img_tag["alt"]).lower():
-            return IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED
+            return IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED
 
         if str(img_tag["src"]).endswith("icon_exc.svg"):
             return IliasElementType.EXERCISE
@@ -1032,12 +873,6 @@ class IliasPage:
         if str(img_tag["src"]).endswith("icon_tst.svg"):
             return IliasElementType.TEST
 
-        if str(img_tag["src"]).endswith("icon_mcst.svg"):
-            return IliasElementType.MEDIACAST_VIDEO_FOLDER
-
-        if str(img_tag["src"]).endswith("icon_sahs.svg"):
-            return IliasElementType.SCORM_LEARNING_MODULE
-
         return IliasElementType.FOLDER
 
     @staticmethod
@@ -1067,34 +902,6 @@ class IliasPage:
         rest_of_name = split_delimiter.join(meeting_name.split(split_delimiter)[1:])
         return datetime.strftime(date_portion, "%Y-%m-%d") + split_delimiter + rest_of_name
 
-    @staticmethod
-    def is_logged_in(soup: BeautifulSoup) -> bool:
-        # Normal ILIAS pages
-        mainbar: Optional[Tag] = soup.find(class_="il-maincontrols-metabar")
-        if mainbar is not None:
-            login_button = mainbar.find(attrs={"href": lambda x: x and "login.php" in x})
-            shib_login = soup.find(id="button_shib_login")
-            return not login_button and not shib_login
-
-        # Personal Desktop
-        if soup.find("a", attrs={"href": lambda x: x and "block_type=pditems" in x}):
-            return True
-
-        # Video listing embeds do not have complete ILIAS html. Try to match them by
-        # their video listing table
-        video_table = soup.find(
-            recursive=True,
-            name="table",
-            attrs={"id": lambda x: x is not None and x.startswith("tbl_xoct")}
-        )
-        if video_table is not None:
-            return True
-        # The individual video player wrapper page has nothing of the above.
-        # Match it by its playerContainer.
-        if soup.select_one("#playerContainer") is not None:
-            return True
-        return False
-
     def _abs_url_from_link(self, link_tag: Tag) -> str:
         """
         Create an absolute url from an <a> tag.

PFERD/crawl/ilias/kit_ilias_web_crawler.py

@@ -1,11 +1,8 @@
 import asyncio
-import base64
-import os
 import re
 from collections.abc import Awaitable, Coroutine
 from pathlib import PurePath
-from typing import Any, Callable, Dict, List, Literal, Optional, Set, Union, cast
-from urllib.parse import urljoin
+from typing import Any, Callable, Dict, List, Optional, Set, Union, cast
 
 import aiohttp
 import yarl
@@ -19,10 +16,10 @@ from ...output_dir import FileSink, Redownload
 from ...utils import fmt_path, soupify, url_set_query_param
 from ..crawler import AWrapped, CrawlError, CrawlToken, CrawlWarning, DownloadToken, anoncritical
 from ..http_crawler import HttpCrawler, HttpCrawlerSection
-from .file_templates import Links, learning_module_template
+from .file_templates import Links
 from .ilias_html_cleaner import clean, insert_base_markup
-from .kit_ilias_html import (IliasElementType, IliasForumThread, IliasLearningModulePage, IliasPage,
-                             IliasPageElement, _sanitize_path_name, parse_ilias_forum_export)
+from .kit_ilias_html import (IliasElementType, IliasForumThread, IliasPage, IliasPageElement,
+                             _sanitize_path_name, parse_ilias_forum_export)
 
 TargetType = Union[str, int]
 
@@ -81,25 +78,21 @@ class KitIliasWebCrawlerSection(HttpCrawlerSection):
         return self.s.getboolean("forums", fallback=False)
 
 
-_DIRECTORY_PAGES: Set[IliasElementType] = {
+_DIRECTORY_PAGES: Set[IliasElementType] = set([
     IliasElementType.EXERCISE,
     IliasElementType.EXERCISE_FILES,
     IliasElementType.FOLDER,
-    IliasElementType.INFO_TAB,
     IliasElementType.MEETING,
-    IliasElementType.MEDIACAST_VIDEO_FOLDER,
-    IliasElementType.OPENCAST_VIDEO_FOLDER,
-    IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED,
-}
+    IliasElementType.VIDEO_FOLDER,
+    IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED,
+])
 
-_VIDEO_ELEMENTS: Set[IliasElementType] = {
-    IliasElementType.MEDIACAST_VIDEO_FOLDER,
-    IliasElementType.MEDIACAST_VIDEO,
-    IliasElementType.OPENCAST_VIDEO,
-    IliasElementType.OPENCAST_VIDEO_PLAYER,
-    IliasElementType.OPENCAST_VIDEO_FOLDER,
-    IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED,
-}
+_VIDEO_ELEMENTS: Set[IliasElementType] = set([
+    IliasElementType.VIDEO,
+    IliasElementType.VIDEO_PLAYER,
+    IliasElementType.VIDEO_FOLDER,
+    IliasElementType.VIDEO_FOLDER_MAYBE_PAGINATED,
+])
 
 
 def _iorepeat(attempts: int, name: str, failure_is_error: bool = False) -> Callable[[AWrapped], AWrapped]:
@@ -133,17 +126,6 @@ def _iorepeat(attempts: int, name: str, failure_is_error: bool = False) -> Calla
     return decorator
 
 
-def _wrap_io_in_warning(name: str) -> Callable[[AWrapped], AWrapped]:
-    """
-    Wraps any I/O exception in a CrawlWarning.
-    """
-    return _iorepeat(1, name)
-
-
-def _get_video_cache_key(element: IliasPageElement) -> str:
-    return f"ilias-video-cache-{element.id()}"
-
-
 # Crawler control flow:
 #
 #     crawl_desktop -+
@@ -237,82 +219,22 @@ instance's greatest bottleneck.
             return
         cl = maybe_cl  # Not mypy's fault, but explained here: https://github.com/python/mypy/issues/2608
 
-        elements: List[IliasPageElement] = []
-        # A list as variable redefinitions are not propagated to outer scopes
-        description: List[BeautifulSoup] = []
-
-        @_iorepeat(3, "crawling url")
-        async def gather_elements() -> None:
-            elements.clear()
-            async with cl:
-                next_stage_url: Optional[str] = url
-                current_parent = None
-
-                # Duplicated code, but the root page is special - we want to avoid fetching it twice!
-                while next_stage_url:
-                    soup = await self._get_page(next_stage_url, root_page_allowed=True)
-
-                    if current_parent is None and expected_id is not None:
+        def ensure_is_valid_course_id(parent: Optional[IliasPageElement], soup: BeautifulSoup) -> None:
+            if parent is None and expected_id is not None:
                 perma_link_element: Tag = soup.find(id="current_perma_link")
                 if not perma_link_element or "crs_" not in perma_link_element.get("value"):
                     raise CrawlError("Invalid course id? Didn't find anything looking like a course")
 
-                    log.explain_topic(f"Parsing HTML page for {fmt_path(cl.path)}")
-                    log.explain(f"URL: {next_stage_url}")
-                    page = IliasPage(soup, next_stage_url, current_parent)
-                    if next_element := page.get_next_stage_element():
-                        current_parent = next_element
-                        next_stage_url = next_element.url
-                    else:
-                        next_stage_url = None
-
-                elements.extend(page.get_child_elements())
-                if info_tab := page.get_info_tab():
-                    elements.append(info_tab)
-                if description_string := page.get_description():
-                    description.append(description_string)
-
-        # Fill up our task list with the found elements
-        await gather_elements()
-
-        if description:
-            await self._download_description(PurePath("."), description[0])
-
-        elements.sort(key=lambda e: e.id())
-
-        tasks: List[Awaitable[None]] = []
-        for element in elements:
-            if handle := await self._handle_ilias_element(PurePath("."), element):
-                tasks.append(asyncio.create_task(handle))
-
-        # And execute them
-        await self.gather(tasks)
-
-    async def _handle_ilias_page(
-        self,
-        url: str,
-        parent: IliasPageElement,
-        path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
-        maybe_cl = await self.crawl(path)
-        if not maybe_cl:
-            return None
-        return self._crawl_ilias_page(url, parent, maybe_cl)
+        await self._crawl_ilias_page(url, None, cl, ensure_is_valid_course_id)
 
     @anoncritical
     async def _crawl_ilias_page(
         self,
         url: str,
-        parent: IliasPageElement,
+        parent: Optional[IliasPageElement],
         cl: CrawlToken,
+        next_stage_hook: Callable[[Optional[IliasPageElement], BeautifulSoup], None] = lambda a, b: None
     ) -> None:
-        elements: List[IliasPageElement] = []
-        # A list as variable redefinitions are not propagated to outer scopes
-        description: List[BeautifulSoup] = []
-
-        @_iorepeat(3, "crawling folder")
-        async def gather_elements() -> None:
-            elements.clear()
         async with cl:
             next_stage_url: Optional[str] = url
             current_parent = parent
@@ -321,6 +243,9 @@ instance's greatest bottleneck.
                 soup = await self._get_page(next_stage_url)
                 log.explain_topic(f"Parsing HTML page for {fmt_path(cl.path)}")
                 log.explain(f"URL: {next_stage_url}")
+
+                next_stage_hook(current_parent, soup)
+
                 page = IliasPage(soup, next_stage_url, current_parent)
                 if next_element := page.get_next_stage_element():
                     current_parent = next_element
@@ -328,25 +253,11 @@ instance's greatest bottleneck.
                 else:
                     next_stage_url = None
 
-                elements.extend(page.get_child_elements())
+        for element in sorted(page.get_child_elements(), key=lambda e: e.id()):
+            await self._handle_ilias_element(cl.path, element)
+
         if description_string := page.get_description():
-                    description.append(description_string)
-
-        # Fill up our task list with the found elements
-        await gather_elements()
-
-        if description:
-            await self._download_description(cl.path, description[0])
-
-        elements.sort(key=lambda e: e.id())
-
-        tasks: List[Awaitable[None]] = []
-        for element in elements:
-            if handle := await self._handle_ilias_element(cl.path, element):
-                tasks.append(asyncio.create_task(handle))
-
-        # And execute them
-        await self.gather(tasks)
+            await self._download_description(cl.path, description_string)
 
     # These decorators only apply *to this method* and *NOT* to the returned
     # awaitables!
@@ -358,7 +269,7 @@ instance's greatest bottleneck.
         self,
         parent_path: PurePath,
         element: IliasPageElement,
-    ) -> Optional[Coroutine[Any, Any, None]]:
+    ) -> None:
         if element.url in self._visited_urls:
             raise CrawlWarning(
                 f"Found second path to element {element.name!r} at {element.url!r}. "
@@ -380,7 +291,7 @@ instance's greatest bottleneck.
                 return None
 
         if element.type == IliasElementType.FILE:
-            return await self._handle_file(element, element_path)
+            await self._handle_file(element, element_path)
         elif element.type == IliasElementType.FORUM:
             if not self._forums:
                 log.status(
@@ -390,7 +301,7 @@ instance's greatest bottleneck.
                     "[bright_black](enable with option 'forums')"
                 )
                 return None
-            return await self._handle_forum(element, element_path)
+            await self._handle_forum(element, element_path)
         elif element.type == IliasElementType.TEST:
             log.status(
                 "[bold bright_black]",
@@ -407,28 +318,19 @@ instance's greatest bottleneck.
                 "[bright_black](surveys contain no relevant data)"
             )
             return None
-        elif element.type == IliasElementType.SCORM_LEARNING_MODULE:
-            log.status(
-                "[bold bright_black]",
-                "Ignored",
-                fmt_path(element_path),
-                "[bright_black](scorm learning modules are not supported)"
-            )
-            return None
-        elif element.type == IliasElementType.LEARNING_MODULE:
-            return await self._handle_learning_module(element, element_path)
         elif element.type == IliasElementType.LINK:
-            return await self._handle_link(element, element_path)
+            await self._handle_link(element, element_path)
         elif element.type == IliasElementType.BOOKING:
-            return await self._handle_booking(element, element_path)
-        elif element.type == IliasElementType.OPENCAST_VIDEO:
-            return await self._handle_file(element, element_path)
-        elif element.type == IliasElementType.OPENCAST_VIDEO_PLAYER:
-            return await self._handle_opencast_video(element, element_path)
-        elif element.type == IliasElementType.MEDIACAST_VIDEO:
-            return await self._handle_file(element, element_path)
+            await self._handle_booking(element, element_path)
+        elif element.type == IliasElementType.VIDEO:
+            await self._handle_file(element, element_path)
+        elif element.type == IliasElementType.VIDEO_PLAYER:
+            await self._handle_video(element, element_path)
         elif element.type in _DIRECTORY_PAGES:
-            return await self._handle_ilias_page(element.url, element, element_path)
+            maybe_cl = await self.crawl(element_path)
+            if not maybe_cl:
+                return None
+            await self._crawl_ilias_page(element.url, element, maybe_cl)
         else:
             # This will retry it a few times, failing everytime. It doesn't make any network
             # requests, so that's fine.
@@ -438,7 +340,7 @@ instance's greatest bottleneck.
         self,
         element: IliasPageElement,
         element_path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
+    ) -> None:
         log.explain_topic(f"Decision: Crawl Link {fmt_path(element_path)}")
         log.explain(f"Links type is {self._links}")
 
@@ -455,7 +357,7 @@ instance's greatest bottleneck.
         if not maybe_dl:
             return None
 
-        return self._download_link(element, link_template_maybe, maybe_dl)
+        await self._download_link(element, link_template_maybe, maybe_dl)
 
     @anoncritical
     @_iorepeat(3, "resolving link")
@@ -543,16 +445,16 @@ instance's greatest bottleneck.
 
         raise CrawlError("resolve_link_target failed even after authenticating")
 
-    async def _handle_opencast_video(
+    async def _handle_video(
         self,
         element: IliasPageElement,
         element_path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
+    ) -> None:
         # Copy old mapping as it is likely still relevant
         if self.prev_report:
             self.report.add_custom_value(
-                _get_video_cache_key(element),
-                self.prev_report.get_custom_value(_get_video_cache_key(element))
+                str(element_path),
+                self.prev_report.get_custom_value(str(element_path))
             )
 
         # A video might contain other videos, so let's "crawl" the video first
@@ -562,69 +464,58 @@ instance's greatest bottleneck.
         # to ensure backwards compatibility.
         maybe_dl = await self.download(element_path, mtime=element.mtime, redownload=Redownload.ALWAYS)
 
-        # If we do not want to crawl it (user filter), we can move on
-        if not maybe_dl:
-            return None
-
-        # If we have every file from the cached mapping already, we can ignore this and bail
-        if self._all_opencast_videos_locally_present(element, maybe_dl.path):
-            # Mark all existing videos as known to ensure they do not get deleted during cleanup.
-            # We "downloaded" them, just without actually making a network request as we assumed
-            # they did not change.
-            contained = self._previous_contained_opencast_videos(element, maybe_dl.path)
-            if len(contained) > 1:
-                # Only do this if we threw away the original dl token,
-                # to not download single-stream videos twice
-                for video in contained:
+        # If we do not want to crawl it (user filter) or we have every file
+        # from the cached mapping already, we can ignore this and bail
+        if not maybe_dl or self._all_videos_locally_present(element_path):
+            # Mark all existing cideos as known so they do not get deleted
+            # during dleanup. We "downloaded" them, just without actually making
+            # a network request as we assumed they did not change.
+            for video in self._previous_contained_videos(element_path):
                 await self.download(video)
 
             return None
 
-        return self._download_opencast_video(element, maybe_dl)
+        await self._download_video(element_path, element, maybe_dl)
 
-    def _previous_contained_opencast_videos(
-        self, element: IliasPageElement, element_path: PurePath
-    ) -> List[PurePath]:
+    def _previous_contained_videos(self, video_path: PurePath) -> List[PurePath]:
         if not self.prev_report:
             return []
-        custom_value = self.prev_report.get_custom_value(_get_video_cache_key(element))
+        custom_value = self.prev_report.get_custom_value(str(video_path))
         if not custom_value:
             return []
-        cached_value = cast(dict[str, Any], custom_value)
-        if "known_paths" not in cached_value or "own_path" not in cached_value:
-            log.explain(f"'known_paths' or 'own_path' missing from cached value: {cached_value}")
-            return []
-        transformed_own_path = self._transformer.transform(element_path)
-        if cached_value["own_path"] != str(transformed_own_path):
-            log.explain(
-                f"own_path '{transformed_own_path}' does not match cached value: '{cached_value['own_path']}"
-            )
-            return []
-        return [PurePath(name) for name in cached_value["known_paths"]]
+        names = cast(List[str], custom_value)
+        folder = video_path.parent
+        return [PurePath(folder, name) for name in names]
 
-    def _all_opencast_videos_locally_present(self, element: IliasPageElement, element_path: PurePath) -> bool:
-        log.explain_topic(f"Checking local cache for video {fmt_path(element_path)}")
-        if contained_videos := self._previous_contained_opencast_videos(element, element_path):
-            log.explain(
-                f"The following contained videos are known: {','.join(map(fmt_path, contained_videos))}"
-            )
-            if all(self._output_dir.resolve(path).exists() for path in contained_videos):
-                log.explain("Found all known videos locally, skipping enumeration request")
+    def _all_videos_locally_present(self, video_path: PurePath) -> bool:
+        if contained_videos := self._previous_contained_videos(video_path):
+            log.explain_topic(f"Checking local cache for video {video_path.name}")
+            all_found_locally = True
+            for video in contained_videos:
+                transformed_path = self._to_local_video_path(video)
+                if transformed_path:
+                    exists_locally = self._output_dir.resolve(transformed_path).exists()
+                    all_found_locally = all_found_locally and exists_locally
+            if all_found_locally:
+                log.explain("Found all videos locally, skipping enumeration request")
                 return True
             log.explain("Missing at least one video, continuing with requests!")
-        else:
-            log.explain("No local cache present")
         return False
 
+    def _to_local_video_path(self, path: PurePath) -> Optional[PurePath]:
+        if transformed := self._transformer.transform(path):
+            return self._deduplicator.fixup_path(transformed)
+        return None
+
     @anoncritical
     @_iorepeat(3, "downloading video")
-    async def _download_opencast_video(self, element: IliasPageElement, dl: DownloadToken) -> None:
-        def add_to_report(paths: list[str]) -> None:
-            self.report.add_custom_value(
-                _get_video_cache_key(element),
-                {"known_paths": paths, "own_path": str(self._transformer.transform(dl.path))}
-            )
-
+    async def _download_video(
+        self,
+        original_path: PurePath,
+        element: IliasPageElement,
+        dl: DownloadToken
+    ) -> None:
+        stream_elements: List[IliasPageElement] = []
         async with dl as (bar, sink):
             page = IliasPage(await self._get_page(element.url), element.url, element)
             stream_elements = page.get_child_elements()
@@ -635,38 +526,45 @@ instance's greatest bottleneck.
                 log.explain(f"Using single video mode for {element.name}")
                 stream_element = stream_elements[0]
 
+                transformed_path = self._to_local_video_path(original_path)
+                if not transformed_path:
+                    raise CrawlError(f"Download returned a path but transform did not for {original_path}")
+
                 # We do not have a local cache yet
+                if self._output_dir.resolve(transformed_path).exists():
+                    log.explain(f"Video for {element.name} existed locally")
+                else:
                     await self._stream_from_url(stream_element.url, sink, bar, is_video=True)
-                add_to_report([str(self._transformer.transform(dl.path))])
+                self.report.add_custom_value(str(original_path), [original_path.name])
                 return
 
         contained_video_paths: List[str] = []
 
         for stream_element in stream_elements:
-            video_path = dl.path.parent / stream_element.name
+            video_path = original_path.parent / stream_element.name
+            contained_video_paths.append(str(video_path))
 
             maybe_dl = await self.download(video_path, mtime=element.mtime, redownload=Redownload.NEVER)
             if not maybe_dl:
                 continue
             async with maybe_dl as (bar, sink):
                 log.explain(f"Streaming video from real url {stream_element.url}")
-                contained_video_paths.append(str(self._transformer.transform(maybe_dl.path)))
                 await self._stream_from_url(stream_element.url, sink, bar, is_video=True)
 
-        add_to_report(contained_video_paths)
+        self.report.add_custom_value(str(original_path), contained_video_paths)
 
     async def _handle_file(
         self,
         element: IliasPageElement,
         element_path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
+    ) -> None:
         maybe_dl = await self.download(element_path, mtime=element.mtime)
         if not maybe_dl:
             return None
-        return self._download_file(element, maybe_dl)
+        await self._download_file(element, maybe_dl)
 
-    @_iorepeat(3, "downloading file")
     @anoncritical
+    @_iorepeat(3, "downloading file")
     async def _download_file(self, element: IliasPageElement, dl: DownloadToken) -> None:
         assert dl  # The function is only reached when dl is not None
         async with dl as (bar, sink):
@@ -706,11 +604,11 @@ instance's greatest bottleneck.
         self,
         element: IliasPageElement,
         element_path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
+    ) -> None:
         maybe_cl = await self.crawl(element_path)
         if not maybe_cl:
             return None
-        return self._crawl_forum(element, maybe_cl)
+        await self._crawl_forum(element, maybe_cl)
 
     @_iorepeat(3, "crawling forum")
     @anoncritical
@@ -724,7 +622,7 @@ instance's greatest bottleneck.
                 log.explain(f"URL: {next_stage_url}")
 
                 soup = await self._get_page(next_stage_url)
-                page = IliasPage(soup, next_stage_url, element)
+                page = IliasPage(soup, next_stage_url, None)
 
                 if next := page.get_next_stage_element():
                     next_stage_url = next.url
@@ -736,6 +634,7 @@ instance's greatest bottleneck.
                 raise CrawlWarning("Failed to extract forum data")
             if download_data.empty:
                 log.explain("Forum had no threads")
+                elements = []
                 return
             html = await self._post_authenticated(download_data.url, download_data.form_data)
             elements = parse_ilias_forum_export(soupify(html))
@@ -767,142 +666,12 @@ instance's greatest bottleneck.
             sink.file.write(content.encode("utf-8"))
             sink.done()
 
-    async def _handle_learning_module(
-        self,
-        element: IliasPageElement,
-        element_path: PurePath,
-    ) -> Optional[Coroutine[Any, Any, None]]:
-        maybe_cl = await self.crawl(element_path)
-        if not maybe_cl:
-            return None
-        return self._crawl_learning_module(element, maybe_cl)
-
-    @_iorepeat(3, "crawling learning module")
-    @anoncritical
-    async def _crawl_learning_module(self, element: IliasPageElement, cl: CrawlToken) -> None:
-        elements: List[IliasLearningModulePage] = []
-
-        async with cl:
-            log.explain_topic(f"Parsing initial HTML page for {fmt_path(cl.path)}")
-            log.explain(f"URL: {element.url}")
-            soup = await self._get_page(element.url)
-            page = IliasPage(soup, element.url, element)
-            if next := page.get_learning_module_data():
-                elements.extend(await self._crawl_learning_module_direction(
-                    cl.path, next.previous_url, "left", element
-                ))
-                elements.append(next)
-                elements.extend(await self._crawl_learning_module_direction(
-                    cl.path, next.next_url, "right", element
-                ))
-
-        # Reflect their natural ordering in the file names
-        for index, lm_element in enumerate(elements):
-            lm_element.title = f"{index:02}_{lm_element.title}"
-
-        tasks: List[Awaitable[None]] = []
-        for index, elem in enumerate(elements):
-            prev_url = elements[index - 1].title if index > 0 else None
-            next_url = elements[index + 1].title if index < len(elements) - 1 else None
-            tasks.append(asyncio.create_task(
-                self._download_learning_module_page(cl.path, elem, prev_url, next_url)
-            ))
-
-        # And execute them
-        await self.gather(tasks)
-
-    async def _crawl_learning_module_direction(
-        self,
-        path: PurePath,
-        start_url: Optional[str],
-        dir: Union[Literal["left"], Literal["right"]],
-        parent_element: IliasPageElement
-    ) -> List[IliasLearningModulePage]:
-        elements: List[IliasLearningModulePage] = []
-
-        if not start_url:
-            return elements
-
-        next_element_url: Optional[str] = start_url
-        counter = 0
-        while next_element_url:
-            log.explain_topic(f"Parsing HTML page for {fmt_path(path)} ({dir}-{counter})")
-            log.explain(f"URL: {next_element_url}")
-            soup = await self._get_page(next_element_url)
-            page = IliasPage(soup, next_element_url, parent_element)
-            if next := page.get_learning_module_data():
-                elements.append(next)
-                if dir == "left":
-                    next_element_url = next.previous_url
-                else:
-                    next_element_url = next.next_url
-            counter += 1
-
-        return elements
-
-    @anoncritical
-    @_iorepeat(3, "saving learning module page")
-    async def _download_learning_module_page(
-        self,
-        parent_path: PurePath,
-        element: IliasLearningModulePage,
-        prev: Optional[str],
-        next: Optional[str]
-    ) -> None:
-        path = parent_path / (_sanitize_path_name(element.title) + ".html")
-        maybe_dl = await self.download(path)
-        if not maybe_dl:
-            return
-        my_path = self._transformer.transform(maybe_dl.path)
-        if not my_path:
-            return
-
-        if prev:
-            prev_p = self._transformer.transform(parent_path / (_sanitize_path_name(prev) + ".html"))
-            if prev_p:
-                prev = os.path.relpath(prev_p, my_path.parent)
-            else:
-                prev = None
-        if next:
-            next_p = self._transformer.transform(parent_path / (_sanitize_path_name(next) + ".html"))
-            if next_p:
-                next = os.path.relpath(next_p, my_path.parent)
-            else:
-                next = None
-
-        async with maybe_dl as (bar, sink):
-            content = element.content
-            content = await self.internalize_images(content)
-            sink.file.write(learning_module_template(content, maybe_dl.path.name, prev, next).encode("utf-8"))
-            sink.done()
-
-    async def internalize_images(self, tag: Tag) -> Tag:
-        """
-        Tries to fetch ILIAS images and embed them as base64 data.
-        """
-        log.explain_topic("Internalizing images")
-        for elem in tag.find_all(recursive=True):
-            if not isinstance(elem, Tag):
-                continue
-            if elem.name == "img":
-                if src := elem.attrs.get("src", None):
-                    url = urljoin(_ILIAS_URL, src)
-                    if not url.startswith(_ILIAS_URL):
-                        continue
-                    log.explain(f"Internalizing {url!r}")
-                    img = await self._get_authenticated(url)
-                    elem.attrs["src"] = "data:;base64," + base64.b64encode(img).decode()
-            if elem.name == "iframe" and elem.attrs.get("src", "").startswith("//"):
-                # For unknown reasons the protocol seems to be stripped.
-                elem.attrs["src"] = "https:" + elem.attrs["src"]
-        return tag
-
-    async def _get_page(self, url: str, root_page_allowed: bool = False) -> BeautifulSoup:
+    async def _get_page(self, url: str) -> BeautifulSoup:
         auth_id = await self._current_auth_id()
         async with self.session.get(url) as request:
             soup = soupify(await request.read())
-            if IliasPage.is_logged_in(soup):
-                return self._verify_page(soup, url, root_page_allowed)
+            if self._is_logged_in(soup):
+                return soup
 
         # We weren't authenticated, so try to do that
         await self.authenticate(auth_id)
@@ -910,28 +679,15 @@ instance's greatest bottleneck.
         # Retry once after authenticating. If this fails, we will die.
         async with self.session.get(url) as request:
             soup = soupify(await request.read())
-            if IliasPage.is_logged_in(soup):
-                return self._verify_page(soup, url, root_page_allowed)
-        raise CrawlError(f"get_page failed even after authenticating on {url!r}")
-
-    @staticmethod
-    def _verify_page(soup: BeautifulSoup, url: str, root_page_allowed: bool) -> BeautifulSoup:
-        if IliasPage.is_root_page(soup) and not root_page_allowed:
-            raise CrawlError(
-                "Unexpectedly encountered ILIAS root page. "
-                "This usually happens because the ILIAS instance is broken. "
-                "If so, wait a day or two and try again. "
-                "It could also happen because a crawled element links to the ILIAS root page. "
-                "If so, use a transform with a ! as target to ignore the particular element. "
-                f"The redirect came from {url}"
-            )
+            if self._is_logged_in(soup):
                 return soup
+        raise CrawlError("get_page failed even after authenticating")
 
     async def _post_authenticated(
         self,
         url: str,
         data: dict[str, Union[str, List[str]]]
-    ) -> bytes:
+    ) -> BeautifulSoup:
         auth_id = await self._current_auth_id()
 
         form_data = aiohttp.FormData()
@@ -951,28 +707,40 @@ instance's greatest bottleneck.
                 return await request.read()
         raise CrawlError("post_authenticated failed even after authenticating")
 
-    async def _get_authenticated(self, url: str) -> bytes:
-        auth_id = await self._current_auth_id()
-
-        async with self.session.get(url, allow_redirects=False) as request:
-            if request.status == 200:
-                return await request.read()
-
-        # We weren't authenticated, so try to do that
-        await self.authenticate(auth_id)
-
-        # Retry once after authenticating. If this fails, we will die.
-        async with self.session.get(url, allow_redirects=False) as request:
-            if request.status == 200:
-                return await request.read()
-        raise CrawlError("get_authenticated failed even after authenticating")
-
     # We repeat this as the login method in shibboleth doesn't handle I/O errors.
     # Shibboleth is quite reliable as well, the repeat is likely not critical here.
-    @_iorepeat(3, "Login", failure_is_error=True)
+    @ _iorepeat(3, "Login", failure_is_error=True)
     async def _authenticate(self) -> None:
         await self._shibboleth_login.login(self.session)
 
+    @ staticmethod
+    def _is_logged_in(soup: BeautifulSoup) -> bool:
+        # Normal ILIAS pages
+        mainbar: Optional[Tag] = soup.find(class_="il-maincontrols-metabar")
+        if mainbar is not None:
+            login_button = mainbar.find(attrs={"href": lambda x: x and "login.php" in x})
+            shib_login = soup.find(id="button_shib_login")
+            return not login_button and not shib_login
+
+        # Personal Desktop
+        if soup.find("a", attrs={"href": lambda x: x and "block_type=pditems" in x}):
+            return True
+
+        # Video listing embeds do not have complete ILIAS html. Try to match them by
+        # their video listing table
+        video_table = soup.find(
+            recursive=True,
+            name="table",
+            attrs={"id": lambda x: x is not None and x.startswith("tbl_xoct")}
+        )
+        if video_table is not None:
+            return True
+        # The individual video player wrapper page has nothing of the above.
+        # Match it by its playerContainer.
+        if soup.select_one("#playerContainer") is not None:
+            return True
+        return False
+
 
 class KitShibbolethLogin:
     """
@@ -1119,7 +887,7 @@ async def _shib_post(
         async with session.get(correct_url, allow_redirects=False) as response:
             location = response.headers.get("location")
             log.explain(f"Redirected to {location!r} with status {response.status}")
-            # If shib still has a valid session, it will directly respond to the request
+            # If shib still still has a valid session, it will directly respond to the request
             if location is None:
                 log.explain("Shib recognized us, returning its response directly")
                 return soupify(await response.read())

PFERD/crawl/kit_ipd_crawler.py

@@ -2,7 +2,7 @@ import os
 import re
 from dataclasses import dataclass
 from pathlib import PurePath
-from typing import Awaitable, List, Optional, Pattern, Set, Tuple, Union
+from typing import List, Optional, Pattern, Set, Tuple, Union
 from urllib.parse import urljoin
 
 from bs4 import BeautifulSoup, Tag
@@ -64,42 +64,37 @@ class KitIpdCrawler(HttpCrawler):
         self._file_regex = section.link_regex()
 
     async def _run(self) -> None:
-        maybe_cl = await self.crawl(PurePath("."))
-        if not maybe_cl:
+        cl = await self.crawl(PurePath("."))
+        if not cl:
             return
 
-        tasks: List[Awaitable[None]] = []
-
-        async with maybe_cl:
+        async with cl:
             for item in await self._fetch_items():
                 if isinstance(item, KitIpdFolder):
-                    tasks.append(self._crawl_folder(item))
+                    await self._crawl_folder(item)
                 else:
                     # Orphan files are placed in the root folder
-                    tasks.append(self._download_file(PurePath("."), item))
-
-        await self.gather(tasks)
+                    await self._download_file(PurePath("."), item)
 
     async def _crawl_folder(self, folder: KitIpdFolder) -> None:
         path = PurePath(folder.name)
         if not await self.crawl(path):
             return
 
-        tasks = [self._download_file(path, file) for file in folder.files]
-
-        await self.gather(tasks)
+        for file in folder.files:
+            await self._download_file(path, file)
 
     async def _download_file(self, parent: PurePath, file: KitIpdFile) -> None:
         element_path = parent / file.name
-        maybe_dl = await self.download(element_path)
-        if not maybe_dl:
+        dl = await self.download(element_path)
+        if not dl:
             return
 
-        async with maybe_dl as (bar, sink):
+        async with dl as (bar, sink):
             await self._stream_from_url(file.url, sink, bar)
 
     async def _fetch_items(self) -> Set[Union[KitIpdFile, KitIpdFolder]]:
-        page, url = await self.get_page()
+        page, url = await self._get_page()
         elements: List[Tag] = self._find_file_links(page)
         items: Set[Union[KitIpdFile, KitIpdFolder]] = set()
 
@@ -159,12 +154,12 @@ class KitIpdCrawler(HttpCrawler):
 
             sink.done()
 
-    async def get_page(self) -> Tuple[BeautifulSoup, str]:
-        async with self.session.get(self._url) as request:
+    async def _get_page(self) -> Tuple[BeautifulSoup, str]:
+        response = self.session.get(self._url)
+
         # The web page for Algorithmen für Routenplanung contains some
         # weird comments that beautifulsoup doesn't parse correctly. This
         # hack enables those pages to be crawled, and should hopefully not
         # cause issues on other pages.
-            content = (await request.read()).decode("utf-8")
-            content = re.sub(r"<!--.*?-->", "", content)
+        content = re.sub(r"<!--.*?-->", "", response.text)
         return soupify(content.encode("utf-8")), str(request.url)

PFERD/crawl/local_crawler.py

@@ -71,8 +71,6 @@ class LocalCrawler(Crawler):
         if not cl:
             return
 
-        tasks = []
-
         async with cl:
             await asyncio.sleep(random.uniform(
                 0.5 * self._crawl_delay,
@@ -81,9 +79,7 @@ class LocalCrawler(Crawler):
 
             for child in path.iterdir():
                 pure_child = cl.path / child.name
-                tasks.append(self._crawl_path(child, pure_child))
-
-        await self.gather(tasks)
+                await self._crawl_path(child, pure_child)
 
     async def _crawl_file(self, path: Path, pure: PurePath) -> None:
         stat = path.stat()

PFERD/deduplicator.py

@@ -14,7 +14,7 @@ def name_variants(path: PurePath) -> Iterator[PurePath]:
 
 
 class Deduplicator:
-    FORBIDDEN_CHARS = '<>:"/\\|?*' + "".join([chr(i) for i in range(0, 32)])
+    FORBIDDEN_CHARS = '<>:"/\\|?*'
     FORBIDDEN_NAMES = {
         "CON", "PRN", "AUX", "NUL",
         "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",

PFERD/limiter.py

@@ -1,97 +0,0 @@
-import asyncio
-import time
-from contextlib import asynccontextmanager
-from dataclasses import dataclass
-from typing import AsyncIterator, Optional
-
-
-@dataclass
-class Slot:
-    active: bool = False
-    last_left: Optional[float] = None
-
-
-class Limiter:
-    def __init__(
-            self,
-            task_limit: int,
-            download_limit: int,
-            task_delay: float
-    ):
-        if task_limit <= 0:
-            raise ValueError("task limit must be at least 1")
-        if download_limit <= 0:
-            raise ValueError("download limit must be at least 1")
-        if download_limit > task_limit:
-            raise ValueError("download limit can't be greater than task limit")
-        if task_delay < 0:
-            raise ValueError("Task delay must not be negative")
-
-        self._slots = [Slot() for _ in range(task_limit)]
-        self._downloads = download_limit
-        self._delay = task_delay
-
-        self._condition = asyncio.Condition()
-
-    def _acquire_slot(self) -> Optional[Slot]:
-        for slot in self._slots:
-            if not slot.active:
-                slot.active = True
-                return slot
-
-        return None
-
-    async def _wait_for_slot_delay(self, slot: Slot) -> None:
-        if slot.last_left is not None:
-            delay = slot.last_left + self._delay - time.time()
-            if delay > 0:
-                await asyncio.sleep(delay)
-
-    def _release_slot(self, slot: Slot) -> None:
-        slot.last_left = time.time()
-        slot.active = False
-
-    @asynccontextmanager
-    async def limit_crawl(self) -> AsyncIterator[None]:
-        slot: Slot
-        async with self._condition:
-            while True:
-                if found_slot := self._acquire_slot():
-                    slot = found_slot
-                    break
-                await self._condition.wait()
-
-        await self._wait_for_slot_delay(slot)
-
-        try:
-            yield
-        finally:
-            async with self._condition:
-                self._release_slot(slot)
-                self._condition.notify_all()
-
-    @asynccontextmanager
-    async def limit_download(self) -> AsyncIterator[None]:
-        slot: Slot
-        async with self._condition:
-            while True:
-                if self._downloads <= 0:
-                    await self._condition.wait()
-                    continue
-
-                if found_slot := self._acquire_slot():
-                    slot = found_slot
-                    self._downloads -= 1
-                    break
-
-                await self._condition.wait()
-
-        await self._wait_for_slot_delay(slot)
-
-        try:
-            yield
-        finally:
-            async with self._condition:
-                self._release_slot(slot)
-                self._downloads += 1
-                self._condition.notify_all()

PFERD/logging.py

@@ -59,7 +59,6 @@ class Log:
         # Whether different parts of the output are enabled or disabled
         self.output_explain = False
         self.output_status = True
-        self.output_not_deleted = True
         self.output_report = True
 
     def _update_live(self) -> None:
@@ -208,17 +207,6 @@ directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
             action = escape(f"{action:<{self.STATUS_WIDTH}}")
             self.print(f"{style}{action}[/] {escape(text)} {suffix}")
 
-    def not_deleted(self, style: str, action: str, text: str, suffix: str = "") -> None:
-        """
-        Print a message for a local only file that wasn't
-        deleted while crawling. Allows markup in the "style"
-        argument which will be applied to the "action" string.
-        """
-
-        if self.output_status and self.output_not_deleted:
-            action = escape(f"{action:<{self.STATUS_WIDTH}}")
-            self.print(f"{style}{action}[/] {escape(text)} {suffix}")
-
     def report(self, text: str) -> None:
         """
         Print a report after crawling. Allows markup.
@@ -227,14 +215,6 @@ directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
         if self.output_report:
             self.print(text)
 
-    def report_not_deleted(self, text: str) -> None:
-        """
-        Print a report for a local only file that wasn't deleted after crawling. Allows markup.
-        """
-
-        if self.output_report and self.output_not_deleted:
-            self.print(text)
-
     @contextmanager
     def _bar(
             self,

PFERD/output_dir.py

@@ -44,7 +44,6 @@ class OnConflict(Enum):
     LOCAL_FIRST = "local-first"
     REMOTE_FIRST = "remote-first"
     NO_DELETE = "no-delete"
-    NO_DELETE_PROMPT_OVERWRITE = "no-delete-prompt-overwrite"
 
     @staticmethod
     def from_string(string: str) -> "OnConflict":
@@ -52,7 +51,7 @@ class OnConflict(Enum):
             return OnConflict(string)
         except ValueError:
             raise ValueError("must be one of 'prompt', 'local-first',"
-                             " 'remote-first', 'no-delete', 'no-delete-prompt-overwrite'")
+                             " 'remote-first', 'no-delete'")
 
 
 @dataclass
@@ -265,7 +264,7 @@ class OutputDirectory:
             on_conflict: OnConflict,
             path: PurePath,
     ) -> bool:
-        if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
+        if on_conflict == OnConflict.PROMPT:
             async with log.exclusive_output():
                 prompt = f"Replace {fmt_path(path)} with remote file?"
                 return await prompt_yes_no(prompt, default=False)
@@ -284,7 +283,7 @@ class OutputDirectory:
             on_conflict: OnConflict,
             path: PurePath,
     ) -> bool:
-        if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
+        if on_conflict == OnConflict.PROMPT:
             async with log.exclusive_output():
                 prompt = f"Recursively delete {fmt_path(path)} and replace with remote file?"
                 return await prompt_yes_no(prompt, default=False)
@@ -304,7 +303,7 @@ class OutputDirectory:
             path: PurePath,
             parent: PurePath,
     ) -> bool:
-        if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
+        if on_conflict == OnConflict.PROMPT:
             async with log.exclusive_output():
                 prompt = f"Delete {fmt_path(parent)} so remote file {fmt_path(path)} can be downloaded?"
                 return await prompt_yes_no(prompt, default=False)
@@ -331,7 +330,7 @@ class OutputDirectory:
             return False
         elif on_conflict == OnConflict.REMOTE_FIRST:
             return True
-        elif on_conflict in {OnConflict.NO_DELETE, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
+        elif on_conflict == OnConflict.NO_DELETE:
             return False
 
         # This should never be reached
@@ -496,7 +495,7 @@ class OutputDirectory:
             except OSError:
                 pass
         else:
-            log.not_deleted("[bold bright_magenta]", "Not deleted", fmt_path(pure))
+            log.status("[bold bright_magenta]", "Not deleted", fmt_path(pure))
             self._report.not_delete_file(pure)
 
     def load_prev_report(self) -> None:

PFERD/pferd.py

@@ -180,7 +180,7 @@ class Pferd:
                 log.report(f"  [bold bright_magenta]Deleted[/] {fmt_path(path)}")
             for path in sorted(crawler.report.not_deleted_files):
                 something_changed = True
-                log.report_not_deleted(f"  [bold bright_magenta]Not deleted[/] {fmt_path(path)}")
+                log.report(f"  [bold bright_magenta]Not deleted[/] {fmt_path(path)}")
 
             for warning in crawler.report.encountered_warnings:
                 something_changed = True

PFERD/utils.py

@@ -92,17 +92,32 @@ def url_set_query_params(url: str, params: Dict[str, str]) -> str:
 
 
 def str_path(path: PurePath) -> str:
+    """
+    Turn a path into a string, in a platform-independent way.
+
+    This function always uses "/" as path separator, even on Windows.
+    """
     if not path.parts:
         return "."
     return "/".join(path.parts)
 
 
 def fmt_path(path: PurePath) -> str:
+    """
+    Turn a path into a delimited string.
+
+    This is useful if file or directory names contain weird characters like
+    newlines, leading/trailing whitespace or unprintable characters. This way,
+    they are escaped and visible to the user.
+    """
     return repr(str_path(path))
 
 
 def fmt_real_path(path: Path) -> str:
-    return repr(str(path.absolute()))
+    """
+    Like fmt_path, but resolves the path before converting it to a string.
+    """
+    return fmt_path(path.absolute())
 
 
 class ReusableAsyncContextManager(ABC, Generic[T]):

PFERD/version.py

@@ -1,2 +1,2 @@
 NAME = "PFERD"
-VERSION = "3.5.0"
+VERSION = "3.4.3"

flake.lock

@@ -1,27 +0,0 @@
-{
-  "nodes": {
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1694499547,
-        "narHash": "sha256-R7xMz1Iia6JthWRHDn36s/E248WB1/je62ovC/dUVKI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "e5f018cf150e29aac26c61dac0790ea023c46b24",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "nixpkgs": "nixpkgs"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,41 +0,0 @@
-{
-  description = "Tool for downloading course-related files from ILIAS";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
-  };
-
-  outputs = { self, nixpkgs }:
-    let
-      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
-      forAllSystems = nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed;
-    in
-    {
-      packages = forAllSystems (system:
-        let pkgs = import nixpkgs { inherit system; };
-        in
-        rec {
-          default = pkgs.python3Packages.buildPythonApplication rec {
-            pname = "pferd";
-            # Performing black magic
-            # Don't worry, I sacrificed enough goats for the next few years
-            version = (pkgs.lib.importTOML ./PFERD/version.py).VERSION;
-            format = "pyproject";
-
-            src = ./.;
-
-            nativeBuildInputs = with pkgs.python3Packages; [
-              setuptools
-            ];
-
-            propagatedBuildInputs = with pkgs.python3Packages; [
-              aiohttp
-              beautifulsoup4
-              rich
-              keyring
-              certifi
-            ];
-          };
-        });
-    };
-}

scripts/setup

@@ -14,4 +14,4 @@ pip install --editable .
 
 # Installing tools and type hints
 pip install --upgrade mypy flake8 autopep8 isort pyinstaller
-pip install --upgrade types-chardet types-certifi
+mypy PFERD --install-types --non-interactive

setup.cfg

@@ -11,6 +11,7 @@ install_requires =
   rich>=11.0.0
   keyring>=23.5.0
   certifi>=2021.10.8
+  requests>=2.28.1
 
 [options.entry_points]
 console_scripts =