Files
ds-chat/backend/app/schemas/message.py
T
ksmithandClaude Sonnet 5 54932c9c03 Expand direct image links instead of showing nothing (#43 follow-up)
A URL that points straight at an image file (Content-Type: image/*) has
no HTML to scrape Open Graph tags from, so the fetch found nothing and
the message showed no preview at all -- reported against
https://imgs.xkcd.com/comics/creepy.png.

link_preview_service now recognizes an allowed image content-type (same
list storage.py uses for uploads) before falling through to the HTML/og:
path, and returns the URL itself as the preview (LinkPreview.is_image).
No need to download the body -- the already-SSRF-validated URL is the
image. The frontend renders that case as a real expandable image
(message-image + lightbox, same as an actual attachment) instead of the
small title+description card, which would have nothing to show anyway.

Verified end-to-end against the reported URL.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-17 18:01:56 -06:00

47 lines
955 B
Python

import uuid
from datetime import datetime
from pydantic import BaseModel, ConfigDict
class ReactionSummary(BaseModel):
emoji: str
count: int
user_ids: list[str]
class MessageFileInfo(BaseModel):
model_config = ConfigDict(from_attributes=True)
id: uuid.UUID
filename: str
size_bytes: int
content_type: str
class LinkPreviewInfo(BaseModel):
model_config = ConfigDict(from_attributes=True)
url: str
title: str | None
description: str | None
image_url: str | None
site_name: str | None
is_image: bool
class MessageRead(BaseModel):
model_config = ConfigDict(from_attributes=True)
id: uuid.UUID
room_id: uuid.UUID
user_id: uuid.UUID
username: str
content: str | None
image_id: uuid.UUID | None
file: MessageFileInfo | None
link_preview: LinkPreviewInfo | None
reactions: list[ReactionSummary]
created_at: datetime
edited_at: datetime | None