bccfff0c69
6 new ORM models (remote actors, following, remote posts, local posts, interactions, notifications), 20 new FederationService methods with SQL implementations and stubs, WebFinger client, and Alembic migration. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
"""WebFinger client for resolving remote AP actor profiles."""
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from __future__ import annotations
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import logging
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import httpx
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log = logging.getLogger(__name__)
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AP_CONTENT_TYPE = "application/activity+json"
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async def resolve_actor(acct: str) -> dict | None:
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"""Resolve user@domain to actor JSON via WebFinger + actor fetch.
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Args:
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acct: Handle in the form ``user@domain`` (no leading ``@``).
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Returns:
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Actor JSON-LD dict, or None if resolution fails.
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"""
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acct = acct.lstrip("@")
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if "@" not in acct:
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return None
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_, domain = acct.rsplit("@", 1)
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webfinger_url = f"https://{domain}/.well-known/webfinger"
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try:
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async with httpx.AsyncClient(timeout=10, follow_redirects=True) as client:
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# Step 1: WebFinger lookup
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resp = await client.get(
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webfinger_url,
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params={"resource": f"acct:{acct}"},
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headers={"Accept": "application/jrd+json, application/json"},
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)
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if resp.status_code != 200:
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log.debug("WebFinger %s returned %d", webfinger_url, resp.status_code)
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return None
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data = resp.json()
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# Find self link with AP content type
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actor_url = None
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for link in data.get("links", []):
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if link.get("rel") == "self" and link.get("type") in (
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AP_CONTENT_TYPE,
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"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
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):
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actor_url = link.get("href")
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break
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if not actor_url:
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log.debug("No AP self link in WebFinger response for %s", acct)
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return None
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# Step 2: Fetch actor JSON
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resp = await client.get(
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actor_url,
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headers={"Accept": AP_CONTENT_TYPE},
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)
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if resp.status_code == 200:
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return resp.json()
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log.debug("Actor fetch %s returned %d", actor_url, resp.status_code)
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except Exception:
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log.exception("WebFinger resolution failed for %s", acct)
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return None
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