Private
Public Access
ksmithandClaude Sonnet 5
760d2cf5dd
Slack/Discord-style link unfurling: the first http(s) URL in a message's content gets a small preview card (title/description/image/site name) fetched from the page's Open Graph tags. Backend: - Message.preview_url (extracted at create/edit time, cheap regex, no I/O) points at a link_previews cache row keyed by URL -- the same URL posted in different messages/rooms fetches once, and a failed fetch is cached too so a dead URL isn't retried on every reference. - The actual fetch runs in a background asyncio.create_task from broadcast_new_message/broadcast_message_update, on its own DB session, so a slow third-party site never delays message delivery. A separate "link_preview" WS envelope carries the result once it resolves. - SSRF protection reuses app/services/ssrf.py's validate_target_url (renamed from UnsafeWebhookUrlError to UnsafeUrlError now that it's shared with webhooks), but re-validates before every hop of a redirect chain rather than once up front -- redirects are followed manually so each intermediate URL is checked before it's ever connected to. - Parsed with stdlib html.parser -- no new dependency. Frontend: a LinkPreviewCard rendered under message content when present, patched into state live via the new WS envelope and included in message history for reloads. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
46 lines
936 B
Python
46 lines
936 B
Python
import uuid
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from datetime import datetime
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from pydantic import BaseModel, ConfigDict
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class ReactionSummary(BaseModel):
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emoji: str
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count: int
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user_ids: list[str]
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class MessageFileInfo(BaseModel):
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model_config = ConfigDict(from_attributes=True)
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id: uuid.UUID
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filename: str
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size_bytes: int
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content_type: str
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class LinkPreviewInfo(BaseModel):
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model_config = ConfigDict(from_attributes=True)
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url: str
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title: str | None
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description: str | None
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image_url: str | None
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site_name: str | None
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class MessageRead(BaseModel):
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model_config = ConfigDict(from_attributes=True)
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id: uuid.UUID
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room_id: uuid.UUID
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user_id: uuid.UUID
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username: str
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content: str | None
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image_id: uuid.UUID | None
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file: MessageFileInfo | None
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link_preview: LinkPreviewInfo | None
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reactions: list[ReactionSummary]
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created_at: datetime
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edited_at: datetime | None
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