Add DownloadPageAPI to the autoupdater to download from HTML web pages

tools/autoupdate_app_sources/autoupdate_app_sources.py

@@ -24,6 +24,7 @@
     GithubAPI,
     GitlabAPI,
     GiteaForgejoAPI,
+    DownloadPageAPI,
     RefType,
 )  # noqa: E402,E501 pylint: disable=import-error,wrong-import-position
 import appslib.logging_sender  # noqa: E402 pylint: disable=import-error,wrong-import-position
@@ -49,6 +50,7 @@
     "latest_forgejo_release",
     "latest_forgejo_tag",
     "latest_forgejo_commit",
+    "latest_webpage_link",
 ]
 
 
@@ -466,7 +468,7 @@ def get_latest_version_and_asset(
         allow_prereleases = autoupdate.get("allow_prereleases", False)
         _, remote_type, revision_type = strategy.split("_")
 
-        api: Union[GithubAPI, GitlabAPI, GiteaForgejoAPI]
+        api: Union[GithubAPI, GitlabAPI, GiteaForgejoAPI, DownloadPageAPI]
         if remote_type == "github":
             assert upstream and upstream.startswith(
                 "https://github.com/"
@@ -575,6 +577,14 @@ def get_latest_version_and_asset(
                     latest_commit["sha"], self.get_old_ref(infos), RefType.commits
                 ),
             )
+
+        if remote_type == "webpage" and revision_type == "link":
+            api = DownloadPageAPI(upstream)
+            links = api.get_web_page_links()
+            latest_version_orig, latest_version = self.relevant_versions(list(links.keys()), self.app_id, version_re)
+            latest_url = links[latest_version_orig]
+            return latest_version, latest_url, ""
+
         return None
 
     @staticmethod

tools/autoupdate_app_sources/requirements.txt

@@ -2,3 +2,5 @@ requests
 PyGithub
 toml
 tqdm
+beautifulsoup4
+lxml

tools/autoupdate_app_sources/rest_api.py

@@ -4,6 +4,8 @@
 from enum import Enum
 from typing import Any, Optional
 
+from bs4 import BeautifulSoup
+from urllib.parse import urljoin
 import requests
 
 
@@ -206,3 +208,18 @@ def changelog_for_ref(self, new_ref: str, old_ref: str, ref_type: RefType) -> st
             )
         else:
             return f"{self.forge_root}/{self.project_path}/releases/tag/{new_ref}"
+
+
+class DownloadPageAPI:
+    def __init__(self, upstream: str) -> None:
+        self.web_page = upstream
+
+    def get_web_page_links(self) -> dict[str, str]:
+        r = requests.get(self.web_page)
+        r.raise_for_status()
+        soup = BeautifulSoup(r.text, features="lxml")
+
+        return {
+            link.string: urljoin(self.web_page, link.get("href"))
+            for link in soup.find_all('a')
+        }