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Fix TwitterCard meta tags

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TwitterCard meta tags are supposed to use the attributes "name" and "content".
OpenGraph tags use the attributes "property" and "content".

Twitter itself is smart enough to detect broken meta tags and discover the TwitterCard
using "property" and "content", but other platforms that only implement parsing of TwitterCards
and not OpenGraph may fail to correctly detect the tags as they're under the wrong attributes.

> "Open Graph protocol also specifies the use of property and content attributes for markup while
> Twitter cards use name and content. Twitter’s parser will fall back to using property and content,
> so there is no need to modify existing Open Graph protocol markup if it already exists." [0]

[0] https://developer.twitter.com/en/docs/twitter-for-websites/cards/guides/getting-started
This commit is contained in:
Mark Felder 2022-12-19 14:40:08 -05:00
commit 72d4d1b392
3 changed files with 50 additions and 50 deletions
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43
lib/pleroma/web/metadata/providers/twitter_card.ex
View file

@ -20,12 +20,12 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
[
title_tag(user),
{:meta, [property: "twitter:description", content: scrubbed_content], []}
{:meta, [name: "twitter:description", content: scrubbed_content], []}
] ++
if attachments == [] or Metadata.activity_nsfw?(object) do
[
image_tag(user),
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:card", content: "summary"], []}
]
else
attachments
@ -37,20 +37,19 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
with truncated_bio = Utils.scrub_html_and_truncate(user.bio) do
[
title_tag(user),
{:meta, [property: "twitter:description", content: truncated_bio], []},
{:meta, [name: "twitter:description", content: truncated_bio], []},
image_tag(user),
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:card", content: "summary"], []}
]
end
end
defp title_tag(user) do
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []}
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []}
end
def image_tag(user) do
{:meta, [property: "twitter:image", content: MediaProxy.preview_url(User.avatar_url(user))],
[]}
{:meta, [name: "twitter:image", content: MediaProxy.preview_url(User.avatar_url(user))], []}
end
defp build_attachments(id, %{data: %{"attachment" => attachments}}) do
@ -60,10 +59,10 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
case Utils.fetch_media_type(@media_types, url["mediaType"]) do
"audio" ->
[
{:meta, [property: "twitter:card", content: "player"], []},
{:meta, [property: "twitter:player:width", content: "480"], []},
{:meta, [property: "twitter:player:height", content: "80"], []},
{:meta, [property: "twitter:player", content: player_url(id)], []}
{:meta, [name: "twitter:card", content: "player"], []},
{:meta, [name: "twitter:player:width", content: "480"], []},
{:meta, [name: "twitter:player:height", content: "80"], []},
{:meta, [name: "twitter:player", content: player_url(id)], []}
| acc
]
@ -74,10 +73,10 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
# workaround.
"image" ->
[
{:meta, [property: "twitter:card", content: "summary_large_image"], []},
{:meta, [name: "twitter:card", content: "summary_large_image"], []},
{:meta,
[
property: "twitter:player",
name: "twitter:player",
content: MediaProxy.url(url["href"])
], []}
| acc
@ -90,14 +89,14 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
width = url["width"] || 480
[
{:meta, [property: "twitter:card", content: "player"], []},
{:meta, [property: "twitter:player", content: player_url(id)], []},
{:meta, [property: "twitter:player:width", content: "#{width}"], []},
{:meta, [property: "twitter:player:height", content: "#{height}"], []},
{:meta, [property: "twitter:player:stream", content: MediaProxy.url(url["href"])],
{:meta, [name: "twitter:card", content: "player"], []},
{:meta, [name: "twitter:player", content: player_url(id)], []},
{:meta, [name: "twitter:player:width", content: "#{width}"], []},
{:meta, [name: "twitter:player:height", content: "#{height}"], []},
{:meta, [name: "twitter:player:stream", content: MediaProxy.url(url["href"])],
[]},
{:meta,
[property: "twitter:player:stream:content_type", content: url["mediaType"]], []}
{:meta, [name: "twitter:player:stream:content_type", content: url["mediaType"]],
[]}
| acc
]
@ -123,8 +122,8 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
!is_nil(url["height"]) && !is_nil(url["width"]) ->
metadata ++
[
{:meta, [property: "twitter:player:width", content: "#{url["width"]}"], []},
{:meta, [property: "twitter:player:height", content: "#{url["height"]}"], []}
{:meta, [name: "twitter:player:width", content: "#{url["width"]}"], []},
{:meta, [name: "twitter:player:height", content: "#{url["height"]}"], []}
]
true ->