Add RSS/Atom feed for outbox

app/boxes.py

@@ -62,6 +62,7 @@ def save_outbox_object(
         relates_to_actor_id=relates_to_actor_id,
         activity_object_ap_id=ra.activity_object_ap_id,
         is_hidden_from_homepage=True if ra.in_reply_to else False,
+        source=source,
     )
     db.add(outbox_object)
     db.commit()

app/main.py

@@ -3,6 +3,7 @@ import os
 import sys
 import time
 from datetime import datetime
+from datetime import timezone
 from io import BytesIO
 from typing import Any
 from typing import Type
@@ -20,6 +21,7 @@ from fastapi.responses import PlainTextResponse
 from fastapi.responses import RedirectResponse
 from fastapi.responses import StreamingResponse
 from fastapi.staticfiles import StaticFiles
+from feedgen.feed import FeedGenerator  # type: ignore
 from loguru import logger
 from PIL import Image
 from sqlalchemy.orm import Session
@@ -796,3 +798,100 @@ async def robots_file():
 Disallow: /followers
 Disallow: /following
 Disallow: /admin"""
+
+
+def _get_outbox_for_feed(db: Session) -> list[models.OutboxObject]:
+    return (
+        db.query(models.OutboxObject)
+        .filter(
+            models.OutboxObject.visibility == ap.VisibilityEnum.PUBLIC,
+            models.OutboxObject.is_deleted.is_(False),
+            models.OutboxObject.ap_type.in_(["Note", "Article", "Video"]),
+        )
+        .order_by(models.OutboxObject.ap_published_at.desc())
+        .limit(20)
+        .all()
+    )
+
+
+@app.get("/feed.json")
+def json_feed(
+    db: Session = Depends(get_db),
+) -> dict[str, Any]:
+    outbox_objects = _get_outbox_for_feed(db)
+    data = []
+    for outbox_object in outbox_objects:
+        if not outbox_object.ap_published_at:
+            raise ValueError(f"{outbox_object} has no published date")
+        data.append(
+            {
+                "id": outbox_object.public_id,
+                "url": outbox_object.url,
+                "content_html": outbox_object.content,
+                "content_text": outbox_object.source,
+                "date_published": outbox_object.ap_published_at.isoformat(),
+                "attachments": [
+                    {"url": a.url, "mime_type": a.media_type}
+                    for a in outbox_object.attachments
+                ],
+            }
+        )
+    return {
+        "version": "https://jsonfeed.org/version/1",
+        "title": f"{LOCAL_ACTOR.display_name}'s microblog'",
+        "home_page_url": LOCAL_ACTOR.url,
+        "feed_url": BASE_URL + "/feed.json",
+        "author": {
+            "name": LOCAL_ACTOR.display_name,
+            "url": LOCAL_ACTOR.url,
+            "avatar": LOCAL_ACTOR.icon_url,
+        },
+        "items": data,
+    }
+
+
+def _gen_rss_feed(
+    db: Session,
+):
+    fg = FeedGenerator()
+    fg.id(BASE_URL + "/feed.rss")
+    fg.title(f"{LOCAL_ACTOR.display_name}'s microblog")
+    fg.description(f"{LOCAL_ACTOR.display_name}'s microblog")
+    fg.author({"name": LOCAL_ACTOR.display_name})
+    fg.link(href=LOCAL_ACTOR.url, rel="alternate")
+    fg.logo(LOCAL_ACTOR.icon_url)
+    fg.language("en")
+
+    outbox_objects = _get_outbox_for_feed(db)
+    for outbox_object in outbox_objects:
+        if not outbox_object.ap_published_at:
+            raise ValueError(f"{outbox_object} has no published date")
+        fe = fg.add_entry()
+        fe.id(outbox_object.url)
+        fe.link(href=outbox_object.url)
+        fe.title(outbox_object.url)
+        fe.description(outbox_object.content)
+        fe.content(outbox_object.content)
+        fe.published(outbox_object.ap_published_at.replace(tzinfo=timezone.utc))
+
+    return fg
+
+
+@app.get("/feed.rss")
+def rss_feed(
+    db: Session = Depends(get_db),
+) -> PlainTextResponse:
+    return PlainTextResponse(
+        _gen_rss_feed(db).rss_str(),
+        headers={"Content-Type": "application/rss+xml"},
+    )
+
+
+@app.get("/feed.atom")
+def atom_feed(
+    db: Session = Depends(get_db),
+) -> PlainTextResponse:
+    return PlainTextResponse(
+        _gen_rss_feed(db).atom_str(),
+        headers={"Content-Type": "application/atom+xml"},
+    )

app/templates/index.html

@@ -7,7 +7,7 @@
 <meta content="{{ local_actor.url }}" property="og:url" />
 <meta content="{{ local_actor.display_name }}'s microblog" property="og:site_name" />
 <meta content="Homepage" property="og:title" />
-<meta content="{{ local_actor.summary | html2text }}" property="og:description" />
+<meta content="{{ local_actor.summary | html2text | trim }}" property="og:description" />
 <meta content="{{ local_actor.url }}" property="og:image" />
 <meta content="summary" property="twitter:card" />
 <meta content="{{ local_actor.handle }}" property="profile:username" />

app/templates/layout.html

@@ -5,6 +5,9 @@
 <meta http-equiv="x-ua-compatible" content="ie=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 <link rel="stylesheet" href="/static/css/main.css">
+<link rel="alternate" title="{{ local_actor.display_name}}'s microblog" type="application/json" href="{{ url_for("json_feed") }}" />
+<link rel="alternate" href="{{ url_for("rss_feed") }}" type="application/rss+xml" title="{{ local_actor.display_name}}'s microblog">
+<link rel="alternate" href="{{ url_for("atom_feed") }}" type="application/atom+xml" title="{{ local_actor.display_name}}'s microblog">
 <style>
 {{ highlight_css }}
 </style>

poetry.lock

@@ -283,6 +283,18 @@ dev = ["python-jose[cryptography] (>=3.3.0,<4.0.0)", "passlib[bcrypt] (>=1.7.2,<
 doc = ["mkdocs (>=1.1.2,<2.0.0)", "mkdocs-material (>=8.1.4,<9.0.0)", "mdx-include (>=1.4.1,<2.0.0)", "mkdocs-markdownextradata-plugin (>=0.1.7,<0.3.0)", "typer (>=0.4.1,<0.5.0)", "pyyaml (>=5.3.1,<7.0.0)"]
 test = ["pytest (>=6.2.4,<7.0.0)", "pytest-cov (>=2.12.0,<4.0.0)", "mypy (==0.910)", "flake8 (>=3.8.3,<4.0.0)", "black (==22.3.0)", "isort (>=5.0.6,<6.0.0)", "requests (>=2.24.0,<3.0.0)", "httpx (>=0.14.0,<0.19.0)", "email_validator (>=1.1.1,<2.0.0)", "sqlalchemy (>=1.3.18,<1.5.0)", "peewee (>=3.13.3,<4.0.0)", "databases[sqlite] (>=0.3.2,<0.6.0)", "orjson (>=3.2.1,<4.0.0)", "ujson (>=4.0.1,!=4.0.2,!=4.1.0,!=4.2.0,!=4.3.0,!=5.0.0,!=5.1.0,<6.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "flask (>=1.1.2,<3.0.0)", "anyio[trio] (>=3.2.1,<4.0.0)", "types-ujson (==4.2.1)", "types-orjson (==3.6.2)", "types-dataclasses (==0.6.5)"]
 
+[[package]]
+name = "feedgen"
+version = "0.9.0"
+description = "Feed Generator (ATOM, RSS, Podcasts)"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+lxml = "*"
+python-dateutil = "*"
+
 [[package]]
 name = "flake8"
 version = "4.0.1"
@@ -465,6 +477,20 @@ win32-setctime = {version = ">=1.0.0", markers = "sys_platform == \"win32\""}
 [package.extras]
 dev = ["colorama (>=0.3.4)", "docutils (==0.16)", "flake8 (>=3.7.7)", "tox (>=3.9.0)", "pytest (>=4.6.2)", "pytest-cov (>=2.7.1)", "black (>=19.10b0)", "isort (>=5.1.1)", "Sphinx (>=4.1.1)", "sphinx-autobuild (>=0.7.1)", "sphinx-rtd-theme (>=0.4.3)"]
 
+[[package]]
+name = "lxml"
+version = "4.9.0"
+description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, != 3.4.*"
+
+[package.extras]
+cssselect = ["cssselect (>=0.7)"]
+html5 = ["html5lib"]
+htmlsoup = ["beautifulsoup4"]
+source = ["Cython (>=0.29.7)"]
+
 [[package]]
 name = "mako"
 version = "1.2.0"
@@ -1054,7 +1080,7 @@ dev = ["pytest (>=4.6.2)", "black (>=19.3b0)"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.10"
-content-hash = "ecb1ed5abd25037b2ba0154e079d813607ae59a29e9a6d544dc47c249d382af1"
+content-hash = "2bb47cf626fbd4c87803f8b0362470892a04239b2530676c861401e4352f7483"
 
 [metadata.files]
 alembic = [
@@ -1226,6 +1252,9 @@ fastapi = [
     {file = "fastapi-0.78.0-py3-none-any.whl", hash = "sha256:15fcabd5c78c266fa7ae7d8de9b384bfc2375ee0503463a6febbe3bab69d6f65"},
     {file = "fastapi-0.78.0.tar.gz", hash = "sha256:3233d4a789ba018578658e2af1a4bb5e38bdd122ff722b313666a9b2c6786a83"},
 ]
+feedgen = [
+    {file = "feedgen-0.9.0.tar.gz", hash = "sha256:8e811bdbbed6570034950db23a4388453628a70e689a6e8303ccec430f5a804a"},
+]
 flake8 = [
     {file = "flake8-4.0.1-py2.py3-none-any.whl", hash = "sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d"},
     {file = "flake8-4.0.1.tar.gz", hash = "sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d"},
@@ -1347,6 +1376,71 @@ loguru = [
     {file = "loguru-0.6.0-py3-none-any.whl", hash = "sha256:4e2414d534a2ab57573365b3e6d0234dfb1d84b68b7f3b948e6fb743860a77c3"},
     {file = "loguru-0.6.0.tar.gz", hash = "sha256:066bd06758d0a513e9836fd9c6b5a75bfb3fd36841f4b996bc60b547a309d41c"},
 ]
+lxml = [
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 mako = [
     {file = "Mako-1.2.0-py3-none-any.whl", hash = "sha256:23aab11fdbbb0f1051b93793a58323ff937e98e34aece1c4219675122e57e4ba"},
     {file = "Mako-1.2.0.tar.gz", hash = "sha256:9a7c7e922b87db3686210cf49d5d767033a41d4010b284e747682c92bddd8b39"},

pyproject.toml

@@ -35,6 +35,7 @@ mdx-linkify = "^2.1"
 Pillow = "^9.1.1"
 blurhash-python = "^1.1.3"
 html2text = "^2020.1.16"
+feedgen = "^0.9.0"
 
 [tool.poetry.dev-dependencies]
 black = "^22.3.0"