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PreviewCard.md

PreviewCard.md 7.1 KB
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title: PreviewCard description: Represents a rich preview card that is generated using OpenGraph tags from a URL. menu: docs:

parent: entities

aliases: [ "/entities/card", "/entities/Card", "/entities/previewcard", "/entities/PreviewCard", "/api/entities/card", "/api/entities/Card", "/api/entities/previewcard", "/api/entities/PreviewCard",

]

Examples

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
}

Attributes

url {#url}

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

title {#title}

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

description {#description}

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

type {#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

author_name {#author_name}

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

author_url {#author_url}

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

provider_name {#provider_name}

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

provider_url {#provider_url}

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

html {#html}

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

width {#height}

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

height {#height}

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

image {#image}

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

embed_url {#embed_url}

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

blurhash {#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

Trends::Link entity attributes {#trends-link}

{
  "url": "https://www.nbcnews.com/specials/plan-your-vote-2022-elections/index.html",
  "title": "Plan Your Vote: 2022 Elections",
  "description": "Everything you need to know about the voting rules where you live, including registration, mail-in voting, changes since 2020, and more.",
  "type": "link",
  "author_name": "NBC News",
  "author_url": "",
  "provider_name": "NBC News",
  "provider_url": "",
  "html": "",
  "width": 400,
  "height": 225,
  "image": "https://files.mastodon.social/cache/preview_cards/images/045/027/478/original/0783d5e91a14fd49.jpeg",
  "embed_url": "",
  "blurhash": "UcQmF#ay~qofj[WBj[j[~qof9Fayofofayay",
  "history": [
    {
      "day": "1661817600",
      "accounts": "7",
      "uses": "7"
    },
    {
      "day": "1661731200",
      "accounts": "23",
      "uses": "23"
    },
    {
      "day": "1661644800",
      "accounts": "0",
      "uses": "0"
    },
    {
      "day": "1661558400",
      "accounts": "0",
      "uses": "0"
    },
    {
      "day": "1661472000",
      "accounts": "0",
      "uses": "0"
    },
    {
      "day": "1661385600",
      "accounts": "0",
      "uses": "0"
    },
    {
      "day": "1661299200",
      "accounts": "0",
      "uses": "0"
    }
  ]
}

history {#history}

Description: Usage statistics for given days (typically the past week).\ Type: Array of Hash\ Version history:\ 3.5.0 - added

history[][day] {#history-day}

Description: UNIX timestamp on midnight of the given day.\ Type: String (UNIX timestamp)\ Version history:\ 3.5.0 - added

history[][accounts] {#history-accounts}

Description: The counted accounts using the link within that day.\ Type: String (cast from an integer)\ Version history:\ 3.5.0 - added

history[][uses] {#history-uses}

Description: The counted statuses using the link within that day.\ Type: String (cast from an integer)\ Version history:\ 3.5.0 - added

See also

{{< page-relref ref="entities/Status#card" caption="Status (card attribute)" >}}

{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/serializers/rest/preview_card_serializer.rb" caption="app/serializers/rest/preview_card_serializer.rb" >}}

{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/serializers/rest/trends/link_serializer.rb" caption="app/serializers/rest/trends/link_serializer.rb" >}}

{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/models/trends/links.rb" caption="app/models/trends/links.rb" >}}