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Card

Represents a rich preview card that is generated using OpenGraph tags from a URL.

    • Base attributes
    • Optional attributes
    • See also

video

{
  "url": "https://www.youtube.com/watch?v=OMv_EPMED8Y",
  "title": "♪ Brand New Friend (Christmas Song!)",
  "description": "",
  "type": "video",
  "author_name": "YOGSCAST Lewis & Simon",
  "author_url": "https://www.youtube.com/user/BlueXephos",
  "provider_name": "YouTube",
  "provider_url": "https://www.youtube.com/",
  "html": "<iframe width=\"480\" height=\"270\" src=\"https://www.youtube.com/embed/OMv_EPMED8Y?feature=oembed\" frameborder=\"0\" allowfullscreen=\"\"></iframe>",
  "width": 480,
  "height": 270,
  "image": "https://files.mastodon.social/preview_cards/images/014/179/145/original/9cf4b7cf5567b569.jpeg",
  "embed_url": "",
  "blurhash": "UvK0HNkV,:s9xBR%njog0fo2W=WBS5ozofV@"
}
photo
{
  "url": "https://www.flickr.com/photos/tomfenskephotography/49088768431/",
  "title": "Oregon",
  "description": "",
  "type": "photo",
  "author_name": "Tom Fenske Photography",
  "author_url": "https://www.flickr.com/photos/tomfenskephotography/",
  "provider_name": "Flickr",
  "provider_url": "https://www.flickr.com/",
  "html": "",
  "width": 1024,
  "height": 427,
  "image": "https://files.mastodon.social/preview_cards/images/014/287/139/original/651b1c6976817824.jpeg",
  "embed_url": "https://live.staticflickr.com/65535/49088768431_6a4322b3bb_b.jpg",
  "blurhash": "UnE{@jt6M_oIAhjYs+ayT2WBf9ayRkkDXAj["
}
link
{
  "url": "https://www.theguardian.com/money/2019/dec/07/i-lost-my-193000-inheritance-with-one-wrong-digit-on-my-sort-code",
  "title": "‘I lost my £193,000 inheritance – with one wrong digit on my sort code’",
  "description": "When Peter Teich’s money went to another Barclays customer, the bank offered £25 as a token gesture",
  "type": "link",
  "author_name": "",
  "author_url": "",
  "provider_name": "",
  "provider_url": "",
  "html": "",
  "width": 0,
  "height": 0,
  "image": null,
  "embed_url": "",
  "blurhash": null
}

Base attributes

url

Description: Location of linked resource.
Type: String (URL)
Version history:
1.0.0 - added

title

Description: Title of linked resource.
Type: String
Version history:
1.0.0 - added

description

Description: Description of preview.
Type: String
Version history:
1.0.0 - added

type

Description: The type of the preview card.
Type: String (Enumerable, oneOf)
link = Link OEmbed
photo = Photo OEmbed
video = Video OEmbed
rich = iframe OEmbed. Not currently accepted, so won’t show up in practice.
Version history:
1.3.0 - added

Optional attributes

author_name

Description: The author of the original resource.
Type: String
Version history:
1.3.0 - added

author_url

Description: A link to the author of the original resource.
Type: String (URL)
Version history:
1.3.0 - added

provider_name

Description: The provider of the original resource.
Type: String
Version history:
1.3.0 - added

provider_url

Description: A link to the provider of the original resource.
Type: String (URL)
Version history:
1.3.0 - added

html

Description: HTML to be used for generating the preview card.
Type: String (HTML)
Version history:
1.3.0 - added

width

Description: Width of preview, in pixels.
Type: Number
Version history:
1.3.0 - added

height

Description: Height of preview, in pixels.
Type: Number
Version history:
1.3.0 - added

image

Description: Preview thumbnail.
Type: String (URL)
Version history:
1.0.0 - added

embed_url

Description: Used for photo embeds, instead of custom html.
Type: String (URL)
Version history:
2.1.0 - added

blurhash

Description: A hash computed by the BlurHash algorithm, for generating colorful preview thumbnails when media has not been downloaded yet.
Type: String
Version history:
3.2.0 - added

See also

Status
app/serializers/rest/preview_card_serializer.rb

Last updated July 25, 2020 · Improve this page

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