Bump version to 3.5.1

.gitignore

@@ -3,6 +3,7 @@
 /PFERD.egg-info/
 __pycache__/
 /.vscode/
+/.idea/
 
 # pyinstaller
 /pferd.spec

CHANGELOG.md

@@ -22,20 +22,36 @@ ambiguous situations.
 
 ## Unreleased
 
+## 3.5.1 - 2024-04-09
+
+### Added
+- Support for ILIAS 8
+
+### 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
-- Remove size suffix for files in content pages
-
-### 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
+- Sanitize ascii control characters on Windows
+- Crawling of paginated past meetings
+- Ignore SCORM learning modules
 
 ## 3.4.3 - 2022-11-29
 

PFERD/crawl/ilias/kit_ilias_html.py

@@ -22,10 +22,12 @@ 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"
@@ -93,13 +95,9 @@ class IliasPage:
 
     @staticmethod
     def is_root_page(soup: BeautifulSoup) -> bool:
-        permalink = soup.find(id="current_perma_link")
-        if permalink is None:
+        if permalink := IliasPage.get_soup_permalink(soup):
+            return "goto.php?target=root_" in permalink
         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]:
         """
@@ -120,9 +118,25 @@ 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"]
@@ -209,7 +223,11 @@ class IliasPage:
             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:
@@ -257,22 +275,23 @@ class IliasPage:
         return self._soup.find("a", attrs={"href": lambda x: x and "block_type=pditems" in x})
 
     def _is_content_page(self) -> bool:
-        link = self._soup.find(id="current_perma_link")
-        if not link:
+        if link := self.get_permalink():
+            return "target=copa_" in link
         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:
+        if link := self.get_permalink():
+            return "target=pg_" in 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})
+        element = self._soup.find(
+            "a",
+            attrs={"href": lambda x: x and ("crs_next_sess=1" in x or "crs_prev_sess=1" in x)}
+        )
         if not element:
             return None
         link = self._abs_url_from_link(element)
@@ -281,6 +300,10 @@ 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",
@@ -389,6 +412,23 @@ 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]:
         # ILIAS has three stages for video pages
         # 1. The initial dummy page without any videos. This page contains the link to the listing
@@ -467,8 +507,8 @@ class IliasPage:
             modification_string = link.parent.parent.parent.select_one(
                 f"td.std:nth-child({index})"
             ).getText().strip()
-            if re.search(r"\d+\.\d+.\d+ - \d+:\d+", modification_string):
-                modification_time = datetime.strptime(modification_string, "%d.%m.%Y - %H:%M")
+            if match := re.search(r"\d+\.\d+.\d+ \d+:\d+", modification_string):
+                modification_time = datetime.strptime(match.group(0), "%d.%m.%Y %H:%M")
                 break
 
         if modification_time is None:
@@ -567,7 +607,7 @@ class IliasPage:
             file_listings: List[Tag] = container.findAll(
                 name="a",
                 # download links contain the given command class
-                attrs={"href": lambda x: x and "cmdClass=ilexsubmissionfilegui" in x}
+                attrs={"href": lambda x: x and "cmdclass=ilexsubmissionfilegui" in x.lower()}
             )
 
             # Add each listing as a new
@@ -908,6 +948,9 @@ class IliasPage:
         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.
 
@@ -949,7 +992,11 @@ class IliasPage:
         if img_tag is None:
             img_tag = found_parent.select_one("img.icon")
 
-        if img_tag is None and found_parent.find("a", attrs={"href": lambda x: x and "crs_next_sess=" in x}):
+        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:
             log.explain("Found session expansion button, skipping it as it has no content")
             return None
 
@@ -982,6 +1029,9 @@ class IliasPage:
         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
@@ -1011,6 +1061,37 @@ 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 get_permalink(self) -> Optional[str]:
+        return IliasPage.get_soup_permalink(self._soup)
+
     def _abs_url_from_link(self, link_tag: Tag) -> str:
         """
         Create an absolute url from an <a> tag.
@@ -1023,6 +1104,13 @@ class IliasPage:
         """
         return urljoin(self._page_url, relative_url)
 
+    @staticmethod
+    def get_soup_permalink(soup: BeautifulSoup) -> Optional[str]:
+        perma_link_element: Tag = soup.select_one(".il-footer-permanent-url > a")
+        if not perma_link_element or not perma_link_element.get("href"):
+            return None
+        return perma_link_element.get("href")
+
 
 def _unexpected_html_warning() -> None:
     log.warn("Encountered unexpected HTML structure, ignoring element.")

PFERD/crawl/ilias/kit_ilias_web_crawler.py

@@ -81,24 +81,25 @@ class KitIliasWebCrawlerSection(HttpCrawlerSection):
         return self.s.getboolean("forums", fallback=False)
 
 
-_DIRECTORY_PAGES: Set[IliasElementType] = set([
+_DIRECTORY_PAGES: Set[IliasElementType] = {
     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,
-])
+}
 
-_VIDEO_ELEMENTS: Set[IliasElementType] = set([
+_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,
-])
+}
 
 
 def _iorepeat(attempts: int, name: str, failure_is_error: bool = False) -> Callable[[AWrapped], AWrapped]:
@@ -129,6 +130,7 @@ def _iorepeat(attempts: int, name: str, failure_is_error: bool = False) -> Calla
             raise CrawlError("Impossible return in ilias _iorepeat")
 
         return wrapper  # type: ignore
+
     return decorator
 
 
@@ -139,6 +141,10 @@ def _wrap_io_in_warning(name: str) -> Callable[[AWrapped], AWrapped]:
     return _iorepeat(1, name)
 
 
+def _get_video_cache_key(element: IliasPageElement) -> str:
+    return f"ilias-video-cache-{element.id()}"
+
+
 # Crawler control flow:
 #
 #     crawl_desktop -+
@@ -248,8 +254,8 @@ instance's greatest bottleneck.
                     soup = await self._get_page(next_stage_url, root_page_allowed=True)
 
                     if current_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"):
+                        perma_link = IliasPage.get_soup_permalink(soup)
+                        if not perma_link or "crs_" not in perma_link:
                             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)}")
@@ -262,6 +268,8 @@ instance's greatest bottleneck.
                         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)
 
@@ -400,6 +408,14 @@ 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:
@@ -536,8 +552,8 @@ instance's greatest bottleneck.
         # Copy old mapping as it is likely still relevant
         if self.prev_report:
             self.report.add_custom_value(
-                str(element_path),
-                self.prev_report.get_custom_value(str(element_path))
+                _get_video_cache_key(element),
+                self.prev_report.get_custom_value(_get_video_cache_key(element))
             )
 
         # A video might contain other videos, so let's "crawl" the video first
@@ -547,58 +563,69 @@ 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) or we have every file
-        # from the cached mapping already, we can ignore this and bail
-        if not maybe_dl or self._all_opencast_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_opencast_videos(element_path):
+        # 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:
                     await self.download(video)
 
             return None
 
-        return self._download_opencast_video(element_path, element, maybe_dl)
+        return self._download_opencast_video(element, maybe_dl)
 
-    def _previous_contained_opencast_videos(self, video_path: PurePath) -> List[PurePath]:
+    def _previous_contained_opencast_videos(
+        self, element: IliasPageElement, element_path: PurePath
+    ) -> List[PurePath]:
         if not self.prev_report:
             return []
-        custom_value = self.prev_report.get_custom_value(str(video_path))
+        custom_value = self.prev_report.get_custom_value(_get_video_cache_key(element))
         if not custom_value:
             return []
-        names = cast(List[str], custom_value)
-        folder = video_path.parent
-        return [PurePath(folder, name) for name in names]
+        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"]]
 
-    def _all_opencast_videos_locally_present(self, video_path: PurePath) -> bool:
-        if contained_videos := self._previous_contained_opencast_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_opencast_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")
+    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")
                 return True
             log.explain("Missing at least one video, continuing with requests!")
+        else:
+            log.explain("No local cache present")
         return False
 
-    def _to_local_opencast_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,
-        original_path: PurePath,
-        element: IliasPageElement,
-        dl: DownloadToken
-    ) -> None:
-        stream_elements: List[IliasPageElement] = []
+    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 with dl as (bar, sink):
             page = IliasPage(await self._get_page(element.url), element.url, element)
             stream_elements = page.get_child_elements()
@@ -609,32 +636,25 @@ instance's greatest bottleneck.
                 log.explain(f"Using single video mode for {element.name}")
                 stream_element = stream_elements[0]
 
-                transformed_path = self._to_local_opencast_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)
-                self.report.add_custom_value(str(original_path), [original_path.name])
+                add_to_report([str(self._transformer.transform(dl.path))])
                 return
 
         contained_video_paths: List[str] = []
 
         for stream_element in stream_elements:
-            video_path = original_path.parent / stream_element.name
-            contained_video_paths.append(str(video_path))
+            video_path = dl.path.parent / stream_element.name
 
             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)
 
-        self.report.add_custom_value(str(original_path), contained_video_paths)
+        add_to_report(contained_video_paths)
 
     async def _handle_file(
         self,
@@ -646,8 +666,8 @@ instance's greatest bottleneck.
             return None
         return self._download_file(element, maybe_dl)
 
-    @anoncritical
     @_iorepeat(3, "downloading file")
+    @anoncritical
     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):
@@ -655,12 +675,28 @@ instance's greatest bottleneck.
 
     async def _stream_from_url(self, url: str, sink: FileSink, bar: ProgressBar, is_video: bool) -> None:
         async def try_stream() -> bool:
-            async with self.session.get(url, allow_redirects=is_video) as resp:
+            next_url = url
+
+            # Normal files redirect to the magazine if we are not authenticated. As files could be HTML,
+            # we can not match on the content type here. Instead, we disallow redirects and inspect the
+            # new location. If we are redirected anywhere but the ILIAS 8 "sendfile" command, we assume
+            # our authentication expired.
             if not is_video:
-                    # Redirect means we weren't authenticated
+                async with self.session.get(url, allow_redirects=False) as resp:
+                    # Redirect to anything except a "sendfile" means we weren't authenticated
                     if hdrs.LOCATION in resp.headers:
+                        if "&cmd=sendfile" not in resp.headers[hdrs.LOCATION]:
                             return False
-                # we wanted a video but got HTML
+                        # Directly follow the redirect to not make a second, unnecessary request
+                        next_url = resp.headers[hdrs.LOCATION]
+
+            # Let's try this again and follow redirects
+            return await fetch_follow_redirects(next_url)
+
+        async def fetch_follow_redirects(file_url: str) -> bool:
+            async with self.session.get(file_url) as resp:
+                # We wanted a video but got HTML => Forbidden, auth expired. Logging in won't really
+                # solve that depending on the setup, but it is better than nothing.
                 if is_video and "html" in resp.content_type:
                     return False
 
@@ -705,7 +741,7 @@ 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, None)
+                page = IliasPage(soup, next_stage_url, element)
 
                 if next := page.get_next_stage_element():
                     next_stage_url = next.url
@@ -717,7 +753,6 @@ 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))
@@ -768,14 +803,14 @@ instance's greatest bottleneck.
             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, None)
+            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"
+                    cl.path, next.previous_url, "left", element
                 ))
                 elements.append(next)
                 elements.extend(await self._crawl_learning_module_direction(
-                    cl.path, next.next_url, "right"
+                    cl.path, next.next_url, "right", element
                 ))
 
         # Reflect their natural ordering in the file names
@@ -797,7 +832,8 @@ instance's greatest bottleneck.
         self,
         path: PurePath,
         start_url: Optional[str],
-        dir: Union[Literal["left"], Literal["right"]]
+        dir: Union[Literal["left"], Literal["right"]],
+        parent_element: IliasPageElement
     ) -> List[IliasLearningModulePage]:
         elements: List[IliasLearningModulePage] = []
 
@@ -810,7 +846,7 @@ instance's greatest bottleneck.
             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, None)
+            page = IliasPage(soup, next_element_url, parent_element)
             if next := page.get_learning_module_data():
                 elements.append(next)
                 if dir == "left":
@@ -882,7 +918,7 @@ instance's greatest bottleneck.
         auth_id = await self._current_auth_id()
         async with self.session.get(url) as request:
             soup = soupify(await request.read())
-            if self._is_logged_in(soup):
+            if IliasPage.is_logged_in(soup):
                 return self._verify_page(soup, url, root_page_allowed)
 
         # We weren't authenticated, so try to do that
@@ -891,11 +927,12 @@ 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 self._is_logged_in(soup):
+            if IliasPage.is_logged_in(soup):
                 return self._verify_page(soup, url, root_page_allowed)
-        raise CrawlError("get_page failed even after authenticating")
+        raise CrawlError(f"get_page failed even after authenticating on {url!r}")
 
-    def _verify_page(self, soup: BeautifulSoup, url: str, root_page_allowed: bool) -> BeautifulSoup:
+    @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. "
@@ -949,38 +986,10 @@ instance's greatest bottleneck.
 
     # 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:
     """
@@ -1127,7 +1136,7 @@ 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 still has a valid session, it will directly respond to the request
+            # If shib 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/deduplicator.py

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

PFERD/version.py

@@ -1,2 +1,2 @@
 NAME = "PFERD"
-VERSION = "3.4.3"
+VERSION = "3.5.1"

flake.lock

@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1692986144,
-        "narHash": "sha256-M4VFpy7Av9j+33HF5nIGm0k2+DXXW4qSSKdidIKg5jY=",
+        "lastModified": 1708979614,
+        "narHash": "sha256-FWLWmYojIg6TeqxSnHkKpHu5SGnFP5um1uUjH+wRV6g=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "74e5bdc5478ebbe7ba5849f0d765f92757bb9dbf",
+        "rev": "b7ee09cf5614b02d289cd86fcfa6f24d4e078c2a",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.05",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -2,7 +2,7 @@
   description = "Tool for downloading course-related files from ILIAS";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
   };
 
   outputs = { self, nixpkgs }: