Bump version to 3.5.1

CHANGELOG.md

@@ -22,6 +22,11 @@ ambiguous situations.
 
 ## Unreleased
 
+## 3.5.1 - 2024-04-09
+
+### Added
+- Support for ILIAS 8
+
 ### Fixed
 - Video name deduplication
 

PFERD/crawl/ilias/kit_ilias_html.py

@@ -95,13 +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]:
         """
@@ -279,16 +275,14 @@ 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
@@ -513,8 +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:
@@ -613,7 +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
@@ -1095,6 +1089,9 @@ class IliasPage:
             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.
@@ -1107,6 +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

@@ -130,6 +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
 
 
@@ -253,8 +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)}")
@@ -674,12 +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
 

PFERD/version.py

@@ -1,2 +1,2 @@
 NAME = "PFERD"
-VERSION = "3.5.0"
+VERSION = "3.5.1"

flake.lock

@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1694499547,
-        "narHash": "sha256-R7xMz1Iia6JthWRHDn36s/E248WB1/je62ovC/dUVKI=",
+        "lastModified": 1708979614,
+        "narHash": "sha256-FWLWmYojIg6TeqxSnHkKpHu5SGnFP5um1uUjH+wRV6g=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e5f018cf150e29aac26c61dac0790ea023c46b24",
+        "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 }: