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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 committed by XxXCertifiedForkliftDriverXxX
parent 2a290cb331
commit 997551bac9
2 changed files with 49 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 ->

56
test/pleroma/web/metadata/providers/twitter_card_test.exs
View file

@ -22,10 +22,10 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCardTest do
res = TwitterCard.build_tags(%{user: user})
assert res == [
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [property: "twitter:description", content: "born 19 March 1994"], []},
{:meta, [property: "twitter:image", content: avatar_url], []},
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [name: "twitter:description", content: "born 19 March 1994"], []},
{:meta, [name: "twitter:image", content: avatar_url], []},
{:meta, [name: "twitter:card", content: "summary"], []}
]
end
@ -47,11 +47,11 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCardTest do
result = TwitterCard.build_tags(%{object: note, user: user, activity_id: activity.id})
assert [
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [name: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [name: "twitter:image", content: "http://localhost:4001/images/avi.png"],
[]},
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:card", content: "summary"], []}
] == result
end
@ -73,15 +73,15 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCardTest do
result = TwitterCard.build_tags(%{object: note, user: user, activity_id: activity.id})
assert [
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta,
[
property: "twitter:description",
name: "twitter:description",
content: "Public service announcement on caffeine consumption"
], []},
{:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
{:meta, [name: "twitter:image", content: "http://localhost:4001/images/avi.png"],
[]},
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:card", content: "summary"], []}
] == result
end
@ -123,11 +123,11 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCardTest do
result = TwitterCard.build_tags(%{object: note, user: user, activity_id: activity.id})
assert [
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [name: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [name: "twitter:image", content: "http://localhost:4001/images/avi.png"],
[]},
{:meta, [property: "twitter:card", content: "summary"], []}
{:meta, [name: "twitter:card", content: "summary"], []}
] == result
end
@ -179,26 +179,26 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCardTest do
result = TwitterCard.build_tags(%{object: note, user: user, activity_id: activity.id})
assert [
{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [property: "twitter:card", content: "summary_large_image"], []},
{:meta, [property: "twitter:player", content: "https://pleroma.gov/tenshi.png"], []},
{:meta, [property: "twitter:player:width", content: "1280"], []},
{:meta, [property: "twitter:player:height", content: "1024"], []},
{:meta, [property: "twitter:card", content: "player"], []},
{:meta, [name: "twitter:title", content: Utils.user_name_string(user)], []},
{:meta, [name: "twitter:description", content: "pleroma in a nutshell"], []},
{:meta, [name: "twitter:card", content: "summary_large_image"], []},
{:meta, [name: "twitter:player", content: "https://pleroma.gov/tenshi.png"], []},
{:meta, [name: "twitter:player:width", content: "1280"], []},
{:meta, [name: "twitter:player:height", content: "1024"], []},
{:meta, [name: "twitter:card", content: "player"], []},
{:meta,
[
property: "twitter:player",
name: "twitter:player",
content: Router.Helpers.o_status_url(Endpoint, :notice_player, activity.id)
], []},
{:meta, [property: "twitter:player:width", content: "800"], []},
{:meta, [property: "twitter:player:height", content: "600"], []},
{:meta, [name: "twitter:player:width", content: "800"], []},
{:meta, [name: "twitter:player:height", content: "600"], []},
{:meta,
[
property: "twitter:player:stream",
name: "twitter:player:stream",
content: "https://pleroma.gov/about/juche.webm"
], []},
{:meta, [property: "twitter:player:stream:content_type", content: "video/webm"], []}
{:meta, [name: "twitter:player:stream:content_type", content: "video/webm"], []}
] == result
end
end