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50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
import json
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import requests
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from pyoembed import PyOembedException, oEmbed
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from zerver.lib.url_preview.types import UrlEmbedData, UrlOEmbedData
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def get_oembed_data(url: str, maxwidth: int = 640, maxheight: int = 480) -> UrlEmbedData | None:
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try:
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data = oEmbed(url, maxwidth=maxwidth, maxheight=maxheight)
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except (PyOembedException, json.decoder.JSONDecodeError, requests.exceptions.ConnectionError):
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return None
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oembed_resource_type = data.get("type", "")
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image = data.get("url", data.get("image"))
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thumbnail = data.get("thumbnail_url")
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html = data.get("html", "")
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if oembed_resource_type == "photo" and image:
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return UrlOEmbedData(
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image=image,
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type="photo",
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title=data.get("title"),
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description=data.get("description"),
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)
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if oembed_resource_type == "video" and html and thumbnail:
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return UrlOEmbedData(
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image=thumbnail,
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type="video",
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html=strip_cdata(html),
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title=data.get("title"),
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description=data.get("description"),
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)
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# Otherwise, use the title/description from pyembed as the basis
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# for our other parsers
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return UrlEmbedData(
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title=data.get("title"),
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description=data.get("description"),
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)
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def strip_cdata(html: str) -> str:
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# Work around a bug in SoundCloud's XML generation:
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# <html><![CDATA[<iframe ...></iframe>]]></html>
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if html.startswith("<![CDATA[") and html.endswith("]]>"):
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html = html[9:-3]
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return html
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