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Merge branch 'fix/twittercard-video-dimensions' into 'develop'

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Generate Twittercard/OGP metadata with correct dimensions

See merge request pleroma/pleroma!3456
This commit is contained in:
feld 2021-06-10 15:03:58 +00:00
commit 406dadb56b
6 changed files with 204 additions and 30 deletions
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61
lib/pleroma/web/metadata/providers/open_graph.ex
View file

@ -4,6 +4,7 @@
defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
alias Pleroma.User
alias Pleroma.Web.MediaProxy
alias Pleroma.Web.Metadata
alias Pleroma.Web.Metadata.Providers.Provider
alias Pleroma.Web.Metadata.Utils
@ -32,11 +33,11 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
property: "og:description",
content: scrubbed_content
], []},
{:meta, [property: "og:type", content: "website"], []}
{:meta, [property: "og:type", content: "article"], []}
] ++
if attachments == [] or Metadata.activity_nsfw?(object) do
[
{:meta, [property: "og:image", content: Utils.attachment_url(User.avatar_url(user))],
{:meta, [property: "og:image", content: MediaProxy.preview_url(User.avatar_url(user))],
[]},
{:meta, [property: "og:image:width", content: 150], []},
{:meta, [property: "og:image:height", content: 150], []}
@ -57,8 +58,9 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
], []},
{:meta, [property: "og:url", content: user.uri || user.ap_id], []},
{:meta, [property: "og:description", content: truncated_bio], []},
{:meta, [property: "og:type", content: "website"], []},
{:meta, [property: "og:image", content: Utils.attachment_url(User.avatar_url(user))], []},
{:meta, [property: "og:type", content: "article"], []},
{:meta, [property: "og:image", content: MediaProxy.preview_url(User.avatar_url(user))],
[]},
{:meta, [property: "og:image:width", content: 150], []},
{:meta, [property: "og:image:height", content: 150], []}
]
@ -69,28 +71,35 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
Enum.reduce(attachments, [], fn attachment, acc ->
rendered_tags =
Enum.reduce(attachment["url"], [], fn url, acc ->
# TODO: Add additional properties to objects when we have the data available.
# Also, Whatsapp only wants JPEG or PNGs. It seems that if we add a second og:image
# TODO: Whatsapp only wants JPEG or PNGs. It seems that if we add a second og:image
# object when a Video or GIF is attached it will display that in Whatsapp Rich Preview.
case Utils.fetch_media_type(@media_types, url["mediaType"]) do
"audio" ->
[
{:meta, [property: "og:audio", content: Utils.attachment_url(url["href"])], []}
{:meta, [property: "og:audio", content: MediaProxy.url(url["href"])], []}
| acc
]
# Not using preview_url for this. It saves bandwidth, but the image dimensions will
# be wrong. We generate it on the fly and have no way to capture or analyze the
# image to get the dimensions. This can be an issue for apps/FEs rendering images
# in timelines too, but you can get clever with the aspect ratio metadata as a
# workaround.
"image" ->
[
{:meta, [property: "og:image", content: Utils.attachment_url(url["href"])], []},
{:meta, [property: "og:image", content: MediaProxy.url(url["href"])], []},
{:meta, [property: "og:image:alt", content: attachment["name"]], []}
| acc
]
|> maybe_add_dimensions(url)
"video" ->
[
{:meta, [property: "og:video", content: Utils.attachment_url(url["href"])], []}
{:meta, [property: "og:video", content: MediaProxy.url(url["href"])], []}
| acc
]
|> maybe_add_dimensions(url)
|> maybe_add_video_thumbnail(url)
_ ->
acc
@ -102,4 +111,38 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
end
defp build_attachments(_), do: []
# We can use url["mediaType"] to dynamically fill the metadata
defp maybe_add_dimensions(metadata, url) do
type = url["mediaType"] |> String.split("/") |> List.first()
cond do
!is_nil(url["height"]) && !is_nil(url["width"]) ->
metadata ++
[
{:meta, [property: "og:#{type}:width", content: "#{url["width"]}"], []},
{:meta, [property: "og:#{type}:height", content: "#{url["height"]}"], []}
]
true ->
metadata
end
end
# Media Preview Proxy makes thumbnails of videos without resizing, so we can trust the
# width and height of the source video.
defp maybe_add_video_thumbnail(metadata, url) do
cond do
Pleroma.Config.get([:media_preview_proxy, :enabled], false) ->
metadata ++
[
{:meta, [property: "og:image:width", content: "#{url["width"]}"], []},
{:meta, [property: "og:image:height", content: "#{url["height"]}"], []},
{:meta, [property: "og:image", content: MediaProxy.preview_url(url["href"])], []}
]
true ->
metadata
end
end
end

42
lib/pleroma/web/metadata/providers/twitter_card.ex
View file

@ -5,6 +5,7 @@
defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
alias Pleroma.User
alias Pleroma.Web.MediaProxy
alias Pleroma.Web.Metadata
alias Pleroma.Web.Metadata.Providers.Provider
alias Pleroma.Web.Metadata.Utils
@ -48,14 +49,14 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
end
def image_tag(user) do
{:meta, [property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))], []}
{:meta, [property: "twitter:image", content: MediaProxy.preview_url(User.avatar_url(user))],
[]}
end
defp build_attachments(id, %{data: %{"attachment" => attachments}}) do
Enum.reduce(attachments, [], fn attachment, acc ->
rendered_tags =
Enum.reduce(attachment["url"], [], fn url, acc ->
# TODO: Add additional properties to objects when we have the data available.
case Utils.fetch_media_type(@media_types, url["mediaType"]) do
"audio" ->
[
@ -66,26 +67,35 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
| acc
]
# Not using preview_url for this. It saves bandwidth, but the image dimensions will
# be wrong. We generate it on the fly and have no way to capture or analyze the
# image to get the dimensions. This can be an issue for apps/FEs rendering images
# in timelines too, but you can get clever with the aspect ratio metadata as a
# workaround.
"image" ->
[
{:meta, [property: "twitter:card", content: "summary_large_image"], []},
{:meta,
[
property: "twitter:player",
content: Utils.attachment_url(url["href"])
content: MediaProxy.url(url["href"])
], []}
| acc
]
|> maybe_add_dimensions(url)
# TODO: Need the true width and height values here or Twitter renders an iFrame with
# a bad aspect ratio
"video" ->
# fallback to old placeholder values
height = url["height"] || 480
width = url["width"] || 480
[
{:meta, [property: "twitter:card", content: "player"], []},
{:meta, [property: "twitter:player", content: player_url(id)], []},
{:meta, [property: "twitter:player:width", content: "480"], []},
{:meta, [property: "twitter:player:height", content: "480"], []},
{:meta, [property: "twitter:player:stream", content: url["href"]], []},
{: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,
[property: "twitter:player:stream:content_type", content: url["mediaType"]], []}
| acc
@ -105,4 +115,20 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
defp player_url(id) do
Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice_player, id)
end
# Videos have problems without dimensions, but we used to not provide WxH for images.
# A default (read: incorrect) fallback for images is likely to cause rendering bugs.
defp maybe_add_dimensions(metadata, url) do
cond 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"]}"], []}
]
true ->
metadata
end
end
end

5
lib/pleroma/web/metadata/utils.ex
View file

@ -7,7 +7,6 @@ defmodule Pleroma.Web.Metadata.Utils do
alias Pleroma.Emoji
alias Pleroma.Formatter
alias Pleroma.HTML
alias Pleroma.Web.MediaProxy
def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
content
@ -38,10 +37,6 @@ defmodule Pleroma.Web.Metadata.Utils do
def scrub_html(content), do: content
def attachment_url(url) do
MediaProxy.preview_url(url)
end
def user_name_string(user) do
"#{user.name} " <>
if user.local do