Squashed 'l2/' content from commit 79caa24

git-subtree-dir: l2 git-subtree-split: 79caa24e2129bf6e2cee819327d5622425306b67
2026-02-24 23:07:31 +00:00
commit f54b0fb5da
43 changed files with 10021 additions and 0 deletions
--- a/app/routers/federation.py
+++ b/app/routers/federation.py
@@ -0,0 +1,115 @@
+"""
+Federation routes for L2 server.
+
+Handles WebFinger, nodeinfo, and ActivityPub discovery.
+"""
+
+import logging
+
+from fastapi import APIRouter, Request, HTTPException
+from fastapi.responses import JSONResponse
+
+from ..config import settings
+
+router = APIRouter()
+logger = logging.getLogger(__name__)
+
+
+@router.get("/.well-known/webfinger")
+async def webfinger(resource: str):
+    """WebFinger endpoint for actor discovery."""
+    import db
+
+    # Parse resource (acct:username@domain)
+    if not resource.startswith("acct:"):
+        raise HTTPException(400, "Invalid resource format")
+
+    parts = resource[5:].split("@")
+    if len(parts) != 2:
+        raise HTTPException(400, "Invalid resource format")
+
+    username, domain = parts
+
+    if domain != settings.domain:
+        raise HTTPException(404, "User not on this server")
+
+    user = await db.get_user(username)
+    if not user:
+        raise HTTPException(404, "User not found")
+
+    return JSONResponse(
+        content={
+            "subject": resource,
+            "aliases": [f"https://{settings.domain}/users/{username}"],
+            "links": [
+                {
+                    "rel": "self",
+                    "type": "application/activity+json",
+                    "href": f"https://{settings.domain}/users/{username}",
+                },
+                {
+                    "rel": "http://webfinger.net/rel/profile-page",
+                    "type": "text/html",
+                    "href": f"https://{settings.domain}/users/{username}",
+                },
+            ],
+        },
+        media_type="application/jrd+json",
+    )
+
+
+@router.get("/.well-known/nodeinfo")
+async def nodeinfo_index():
+    """NodeInfo index."""
+    return JSONResponse(
+        content={
+            "links": [
+                {
+                    "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
+                    "href": f"https://{settings.domain}/nodeinfo/2.0",
+                }
+            ]
+        },
+        media_type="application/json",
+    )
+
+
+@router.get("/nodeinfo/2.0")
+async def nodeinfo():
+    """NodeInfo 2.0 endpoint."""
+    import db
+
+    user_count = await db.count_users()
+    activity_count = await db.count_activities()
+
+    return JSONResponse(
+        content={
+            "version": "2.0",
+            "software": {
+                "name": "artdag",
+                "version": "1.0.0",
+            },
+            "protocols": ["activitypub"],
+            "usage": {
+                "users": {"total": user_count, "activeMonth": user_count},
+                "localPosts": activity_count,
+            },
+            "openRegistrations": True,
+            "metadata": {
+                "nodeName": "Art-DAG",
+                "nodeDescription": "Content-addressable media processing with ActivityPub federation",
+            },
+        },
+        media_type="application/json",
+    )
+
+
+@router.get("/.well-known/host-meta")
+async def host_meta():
+    """Host-meta endpoint."""
+    xml = f'''<?xml version="1.0" encoding="UTF-8"?>
+<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
+  <Link rel="lrdd" type="application/xrd+xml" template="https://{settings.domain}/.well-known/webfinger?resource={{uri}}"/>
+</XRD>'''
+    from fastapi.responses import Response
+    return Response(content=xml, media_type="application/xrd+xml")