294 lines
7.5 KiB
Markdown
294 lines
7.5 KiB
Markdown
---
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title: PreviewCard
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description: 表示使用来自 URL 的 OpenGraph 标签生成的富媒体预览卡片。
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menu:
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docs:
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parent: entities
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aliases: [
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"/entities/card",
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"/entities/Card",
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"/entities/previewcard",
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"/entities/PreviewCard",
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"/api/entities/card",
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"/api/entities/Card",
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"/api/entities/previewcard",
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"/api/entities/PreviewCard",
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]
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---
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## 示例
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### 视频
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```json
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{
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"url": "https://www.youtube.com/watch?v=OMv_EPMED8Y",
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"title": "♪ Brand New Friend (Christmas Song!)",
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"description": "",
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"type": "video",
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"author_name": "YOGSCAST Lewis & Simon",
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"author_url": "https://www.youtube.com/user/BlueXephos",
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"provider_name": "YouTube",
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"provider_url": "https://www.youtube.com/",
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"html": "<iframe width=\"480\" height=\"270\" src=\"https://www.youtube.com/embed/OMv_EPMED8Y?feature=oembed\" frameborder=\"0\" allowfullscreen=\"\"></iframe>",
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"width": 480,
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"height": 270,
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"image": "https://files.mastodon.social/preview_cards/images/014/179/145/original/9cf4b7cf5567b569.jpeg",
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"embed_url": "",
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"blurhash": "UvK0HNkV,:s9xBR%njog0fo2W=WBS5ozofV@"
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}
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```
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### 图片
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```json
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{
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"url": "https://www.flickr.com/photos/tomfenskephotography/49088768431/",
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"title": "Oregon",
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"description": "",
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"type": "photo",
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"author_name": "Tom Fenske Photography",
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"author_url": "https://www.flickr.com/photos/tomfenskephotography/",
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"provider_name": "Flickr",
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"provider_url": "https://www.flickr.com/",
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"html": "",
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"width": 1024,
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"height": 427,
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"image": "https://files.mastodon.social/preview_cards/images/014/287/139/original/651b1c6976817824.jpeg",
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"embed_url": "https://live.staticflickr.com/65535/49088768431_6a4322b3bb_b.jpg",
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"blurhash": "UnE{@jt6M_oIAhjYs+ayT2WBf9ayRkkDXAj["
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}
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```
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### 链接
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```json
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{
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"url": "https://www.theguardian.com/money/2019/dec/07/i-lost-my-193000-inheritance-with-one-wrong-digit-on-my-sort-code",
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"title": "‘I lost my £193,000 inheritance – with one wrong digit on my sort code’",
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"description": "When Peter Teich’s money went to another Barclays customer, the bank offered £25 as a token gesture",
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"type": "link",
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"authors": [],
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"author_name": "",
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"author_url": "",
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"provider_name": "",
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"provider_url": "",
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"html": "",
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"width": 0,
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"height": 0,
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"image": null,
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"embed_url": "",
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"blurhash": null
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}
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```
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## 属性
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### `url` {#url}
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**描述:** 链接资源的地址。\
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**类型:** 字符串 (URL)\
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**版本历史:**\
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1.0.0 - 添加
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### `title` {#title}
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**描述:** 链接资源的标题。\
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**类型:** 字符串\
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**版本历史:**\
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1.0.0 - 添加
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### `description` {#description}
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**描述:** 预览的描述。\
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**类型:** 字符串\
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**版本历史:**\
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1.0.0 - 添加
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### `type` {#type}
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**描述:** 预览卡片的类型。\
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**类型:** 字符串 (可枚举, oneOf)\
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`link` = 链接 OEmbed\
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`photo` = 图片 OEmbed\
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`video` = 视频 OEmbed\
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`rich` = iframe OEmbed。当前不接受，因此实际上不会显示。\
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**版本历史:**\
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1.3.0 - 添加
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### `authors` {#authors}
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**描述:** 原始资源的作者的 Fediverse 账号。\
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**类型:** Array of [PreviewCardAuthor]({{< relref "entities/PreviewCardAuthor">}})\
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**版本历史:**\
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4.3.0 - 添加
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### `author_name` {#author_name}
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**描述:** 原始资源的作者。自 4.3.0 起已弃用，客户端应改用 `authors`。\
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**类型:** 字符串\
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**版本历史:**\
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1.3.0 - 添加\
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4.3.0 - deprecated
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### `author_url` {#author_url}
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**描述:** 指向原始资源作者的链接。自 4.3.0 起已弃用，客户端应改用 `authors`。\
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**类型:** 字符串 (URL)\
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**版本历史:**\
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1.3.0 - 添加\
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4.3.0 - deprecated
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### `provider_name` {#provider_name}
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**描述:** 原始资源的提供者。\
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**类型:** 字符串\
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**版本历史:**\
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1.3.0 - 添加
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### `provider_url` {#provider_url}
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**描述:** 指向原始资源提供者的链接。\
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**类型:** 字符串 (URL)\
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**版本历史:**\
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1.3.0 - 添加
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### `html` {#html}
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**描述:** 用于生成预览卡片的 HTML。\
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**类型:** 字符串 (HTML)\
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**版本历史:**\
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1.3.0 - 添加
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### `width` {#height}
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**描述:** 预览的宽度，以像素为单位。\
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**类型:** 整数\
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**版本历史:**\
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1.3.0 - 添加
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### `height` {#height}
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**描述:** 预览的高度，以像素为单位。\
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**类型:** 整数\
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**版本历史:**\
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1.3.0 - 添加
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### `image` {#image}
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**描述:** 预览缩略图。\
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**类型:** {{<nullable>}} 字符串 (URL)\
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**版本历史:**\
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1.0.0 - 添加
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### `embed_url` {#embed_url}
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**描述:** 用于照片嵌入，替代自定义的 `html`。\
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**类型:** 字符串 (URL)\
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**版本历史:**\
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2.1.0 - 添加
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### `blurhash` {#blurhash}
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**描述:** 由 [BlurHash 算法](https://github.com/woltapp/blurhash)计算出的哈希值，用于在媒体尚未下载时生成彩色预览缩略图。\
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**类型:** {{<nullable>}} 字符串\
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**版本历史:**\
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3.2.0 - 添加
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## Trends::Link 实体属性 {#trends-link}
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```json
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{
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"url": "https://www.nbcnews.com/specials/plan-your-vote-2022-elections/index.html",
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"title": "Plan Your Vote: 2022 Elections",
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"description": "Everything you need to know about the voting rules where you live, including registration, mail-in voting, changes since 2020, and more.",
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"type": "link",
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"author_name": "NBC News",
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"author_url": "",
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"provider_name": "NBC News",
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"provider_url": "",
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"html": "",
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"width": 400,
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"height": 225,
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"image": "https://files.mastodon.social/cache/preview_cards/images/045/027/478/original/0783d5e91a14fd49.jpeg",
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"embed_url": "",
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"blurhash": "UcQmF#ay~qofj[WBj[j[~qof9Fayofofayay",
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"history": [
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{
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"day": "1661817600",
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"accounts": "7",
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"uses": "7"
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},
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{
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"day": "1661731200",
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"accounts": "23",
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"uses": "23"
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},
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{
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"day": "1661644800",
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"accounts": "0",
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"uses": "0"
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},
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{
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"day": "1661558400",
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"accounts": "0",
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"uses": "0"
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},
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{
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"day": "1661472000",
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"accounts": "0",
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"uses": "0"
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},
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{
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"day": "1661385600",
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"accounts": "0",
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"uses": "0"
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},
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{
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"day": "1661299200",
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"accounts": "0",
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"uses": "0"
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}
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]
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}
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```
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### `history` {#history}
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**描述:** 给定日期的使用统计信息（通常是过去一周）。\
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**类型:** 哈希值的数组\
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**版本历史:**\
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3.5.0 - 添加
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#### `history[][day]` {#history-day}
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**描述:** 给定日期午夜的 UNIX 时间戳。\
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**类型:** 字符串 (UNIX 时间戳)\
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**版本历史:**\
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3.5.0 - 添加
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#### `history[][accounts]` {#history-accounts}
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**描述:** 当天使用该链接的已计数帐户数。\
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**类型:** 字符串 (从整数转换而来)\
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**版本历史:**\
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3.5.0 - 添加
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#### `history[][uses]` {#history-uses}
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**描述:** 当天使用该链接的已计数嘟文数。\
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**类型:** 字符串 (从整数转换而来)\
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**版本历史:**\
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3.5.0 - 添加
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## 参见
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{{< page-relref ref="entities/Status#card" caption="Status (`card` 属性)" >}}
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{{< 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" >}}
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{{< 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" >}}
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{{< caption-link url="https://github.com/mastodon/mastodon/blob/main/app/models/trends/links.rb" caption="app/models/trends/links.rb" >}}
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{{< translation-status-zh-cn raw_title="PreviewCard" raw_link="/entities/PreviewCard/" last_translation_time="2025-04-21" raw_commit="6addd5cf525adec1859f48c52dafcfe1f96e558a">}}
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