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Merge pull request #2922 from SamantazFox/download-widget-fix

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Download widget fix
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Samantaz Fox 2022-02-24 22:53:06 +01:00 committed by GitHub
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6 changed files with 191 additions and 57 deletions
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5
src/invidious.cr
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@ -29,6 +29,8 @@ require "protodec/utils"
require "./invidious/database/*"
require "./invidious/helpers/*"
require "./invidious/yt_backend/*"
require "./invidious/frontend/*"
require "./invidious/*"
require "./invidious/channels/*"
require "./invidious/user/*"
@ -234,6 +236,7 @@ before_all do |env|
"/api/manifest/",
"/videoplayback",
"/latest_version",
"/download",
}.any? { |r| env.request.resource.starts_with? r }
if env.request.cookies.has_key? "SID"
@ -349,6 +352,8 @@ end
Invidious::Routing.get "/e/:id", Invidious::Routes::Watch, :redirect
Invidious::Routing.get "/redirect", Invidious::Routes::Misc, :cross_instance_redirect
Invidious::Routing.post "/download", Invidious::Routes::Watch, :download
Invidious::Routing.get "/embed/", Invidious::Routes::Embed, :redirect
Invidious::Routing.get "/embed/:id", Invidious::Routes::Embed, :show

108
src/invidious/frontend/watch_page.cr Normal file
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@ -0,0 +1,108 @@
module Invidious::Frontend::WatchPage
extend self
# A handy structure to pass many elements at
# once to the download widget function
struct VideoAssets
getter full_videos : Array(Hash(String, JSON::Any))
getter video_streams : Array(Hash(String, JSON::Any))
getter audio_streams : Array(Hash(String, JSON::Any))
getter captions : Array(Caption)
def initialize(
@full_videos,
@video_streams,
@audio_streams,
@captions
)
end
end
def download_widget(locale : String, video : Video, video_assets : VideoAssets) : String
if CONFIG.disabled?("downloads")
return "<p id=\"download\">#{translate(locale, "Download is disabled.")}</p>"
end
return String.build(4000) do |str|
str << "<form"
str << " class=\"pure-form pure-form-stacked\""
str << " action='/download'"
str << " method='post'"
str << " rel='noopener'"
str << " target='_blank'>"
str << '\n'
# Hidden inputs for video id and title
str << "<input type='hidden' name='id' value='" << video.id << "'/>\n"
str << "<input type='hidden' name='title' value='" << HTML.escape(video.title) << "'/>\n"
str << "\t<div class=\"pure-control-group\">\n"
str << "\t\t<label for='download_widget'>"
str << translate(locale, "Download as: ")
str << "</label>\n"
# TODO: remove inline style
str << "\t\t<select style=\"width:100%\" name='download_widget' id='download_widget'>\n"
# Non-DASH videos (audio+video)
video_assets.full_videos.each do |option|
mimetype = option["mimeType"].as_s.split(";")[0]
height = itag_to_metadata?(option["itag"]).try &.["height"]?
value = {"itag": option["itag"], "ext": mimetype.split("/")[1]}.to_json
str << "\t\t\t<option value='" << value << "'>"
str << (height || "~240") << "p - " << mimetype
str << "</option>\n"
end
# DASH video streams
video_assets.video_streams.each do |option|
mimetype = option["mimeType"].as_s.split(";")[0]
value = {"itag": option["itag"], "ext": mimetype.split("/")[1]}.to_json
str << "\t\t\t<option value='" << value << "'>"
str << option["qualityLabel"] << " - " << mimetype << " @ " << option["fps"] << "fps - video only"
str << "</option>\n"
end
# DASH audio streams
video_assets.audio_streams.each do |option|
mimetype = option["mimeType"].as_s.split(";")[0]
value = {"itag": option["itag"], "ext": mimetype.split("/")[1]}.to_json
str << "\t\t\t<option value='" << value << "'>"
str << mimetype << " @ " << (option["bitrate"]?.try &.as_i./ 1000) << "k - audio only"
str << "</option>\n"
end
# Subtitles (a.k.a "closed captions")
video_assets.captions.each do |caption|
value = {"label": caption.name, "ext": "#{caption.language_code}.vtt"}.to_json
str << "\t\t\t<option value='" << value << "'>"
str << translate(locale, "download_subtitles", translate(locale, caption.name))
str << "</option>\n"
end
# End of form
str << "\t\t</select>\n"
str << "\t</div>\n"
str << "\t<button type=\"submit\" class=\"pure-button pure-button-primary\">\n"
str << "\t\t<b>" << translate(locale, "Download") << "</b>\n"
str << "\t</button>\n"
str << "</form>\n"
end
end
end

6
src/invidious/routes/api/v1/videos.cr
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@ -23,7 +23,11 @@ module Invidious::Routes::API::V1::Videos
env.response.content_type = "application/json"
id = env.params.url["id"]
region = env.params.query["region"]?
region = env.params.query["region"]? || env.params.body["region"]?
if id.nil? || id.size != 11 || !id.matches?(/^[\w-]+$/)
return error_json(400, "Invalid video ID")
end
# See https://github.com/ytdl-org/youtube-dl/blob/6ab30ff50bf6bd0585927cb73c7421bef184f87a/youtube_dl/extractor/youtube.py#L1354
# It is possible to use `/api/timedtext?type=list&v=#{id}` and

40
src/invidious/routes/video_playback.cr
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@ -164,7 +164,9 @@ module Invidious::Routes::VideoPlayback
if title = query_params["title"]?
# https://blog.fastmail.com/2011/06/24/download-non-english-filenames/
env.response.headers["Content-Disposition"] = "attachment; filename=\"#{URI.encode_www_form(title)}\"; filename*=UTF-8''#{URI.encode_www_form(title)}"
filename = URI.encode_www_form(title, space_to_plus: false)
header = "attachment; filename=\"#{filename}\"; filename*=UTF-8''#{filename}"
env.response.headers["Content-Disposition"] = header
end
if !resp.headers.includes_word?("Transfer-Encoding", "chunked")
@ -242,31 +244,25 @@ module Invidious::Routes::VideoPlayback
# YouTube /videoplayback links expire after 6 hours,
# so we have a mechanism here to redirect to the latest version
def self.latest_version(env)
if env.params.query["download_widget"]?
download_widget = JSON.parse(env.params.query["download_widget"])
id = env.params.query["id"]?
itag = env.params.query["itag"]?.try &.to_i?
id = download_widget["id"].as_s
title = URI.decode_www_form(download_widget["title"].as_s)
if label = download_widget["label"]?
return env.redirect "/api/v1/captions/#{id}?label=#{label}&title=#{title}"
else
itag = download_widget["itag"].as_s.to_i
local = "true"
end
# Sanity checks
if id.nil? || id.size != 11 || !id.matches?(/^[\w-]+$/)
return error_template(400, "Invalid video ID")
end
id ||= env.params.query["id"]?
itag ||= env.params.query["itag"]?.try &.to_i
if itag.nil? || itag <= 0 || itag >= 1000
return error_template(400, "Invalid itag")
end
region = env.params.query["region"]?
local = (env.params.query["local"]? == "true")
local ||= env.params.query["local"]?
local ||= "false"
local = local == "true"
title = env.params.query["title"]?
if !id || !itag
haltf env, status_code: 400, response: "TESTING"
if title && CONFIG.disabled?("downloads")
return error_template(403, "Administrator has disabled this endpoint.")
end
video = get_video(id, region: region)
@ -278,8 +274,10 @@ module Invidious::Routes::VideoPlayback
haltf env, status_code: 404
end
url = URI.parse(url).request_target.not_nil! if local
url = "#{url}&title=#{title}" if title
if local
url = URI.parse(url).request_target.not_nil!
url += "&title=#{URI.encode_www_form(title, space_to_plus: false)}" if title
end
return env.redirect url
end

53
src/invidious/routes/watch.cr
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@ -189,6 +189,14 @@ module Invidious::Routes::Watch
return env.redirect url
end
# Structure used for the download widget
video_assets = Invidious::Frontend::WatchPage::VideoAssets.new(
full_videos: fmt_stream,
video_streams: video_streams,
audio_streams: audio_streams,
captions: video.captions
)
templated "watch"
end
@ -281,4 +289,49 @@ module Invidious::Routes::Watch
return error_template(404, "The requested clip doesn't exist")
end
end
def self.download(env)
if CONFIG.disabled?("downloads")
return error_template(403, "Administrator has disabled this endpoint.")
end
title = env.params.body["title"]? || ""
video_id = env.params.body["id"]? || ""
selection = env.params.body["download_widget"]?
if title.empty? || video_id.empty? || selection.nil?
return error_template(400, "Missing form data")
end
download_widget = JSON.parse(selection)
extension = download_widget["ext"].as_s
filename = "#{video_id}-#{title}.#{extension}"
# Pass form parameters as URL parameters for the handlers of both
# /latest_version and /api/v1/captions. This avoids an un-necessary
# redirect and duplicated (and hazardous) sanity checks.
env.params.query["id"] = video_id
env.params.query["title"] = filename
# Delete the useless ones
env.params.body.delete("id")
env.params.body.delete("title")
env.params.body.delete("download_widget")
if label = download_widget["label"]?
# URL params specific to /api/v1/captions/:id
env.params.query["label"] = URI.encode_www_form(label.as_s, space_to_plus: false)
return Invidious::Routes::API::V1::Videos.captions(env)
elsif itag = download_widget["itag"]?.try &.as_i
# URL params specific to /latest_version
env.params.query["itag"] = itag.to_s
env.params.query["local"] = "true"
return Invidious::Routes::VideoPlayback.latest_version(env)
else
return error_template(400, "Invalid label or itag")
end
end
end

36
src/invidious/views/watch.ecr
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@ -168,41 +168,7 @@ we're going to need to do it here in order to allow for translations.
<% end %>
<% end %>
<% if CONFIG.dmca_content.includes?(video.id) || CONFIG.disabled?("downloads") %>
<p id="download"><%= translate(locale, "Download is disabled.") %></p>
<% else %>
<form class="pure-form pure-form-stacked" action="/latest_version" method="get" rel="noopener" target="_blank">
<div class="pure-control-group">
<label for="download_widget"><%= translate(locale, "Download as: ") %></label>
<select style="width:100%" name="download_widget" id="download_widget">
<% fmt_stream.each do |option| %>
<option value='{"id":"<%= video.id %>","itag":"<%= option["itag"] %>","title":"<%= URI.encode_www_form(video.title) %>-<%= video.id %>.<%= option["mimeType"].as_s.split(";")[0].split("/")[1] %>"}'>
<%= itag_to_metadata?(option["itag"]).try &.["height"]? || "~240" %>p - <%= option["mimeType"].as_s.split(";")[0] %>
</option>
<% end %>
<% video_streams.each do |option| %>
<option value='{"id":"<%= video.id %>","itag":"<%= option["itag"] %>","title":"<%= URI.encode_www_form(video.title) %>-<%= video.id %>.<%= option["mimeType"].as_s.split(";")[0].split("/")[1] %>"}'>
<%= option["qualityLabel"] %> - <%= option["mimeType"].as_s.split(";")[0] %> @ <%= option["fps"] %>fps - video only
</option>
<% end %>
<% audio_streams.each do |option| %>
<option value='{"id":"<%= video.id %>","itag":"<%= option["itag"] %>","title":"<%= URI.encode_www_form(video.title) %>-<%= video.id %>.<%= option["mimeType"].as_s.split(";")[0].split("/")[1] %>"}'>
<%= option["mimeType"].as_s.split(";")[0] %> @ <%= option["bitrate"]?.try &.as_i./ 1000 %>k - audio only
</option>
<% end %>
<% captions.each do |caption| %>
<option value='{"id":"<%= video.id %>","label":"<%= caption.name %>","title":"<%= URI.encode_www_form(video.title) %>-<%= video.id %>.<%= caption.language_code %>.vtt"}'>
<%= translate(locale, "download_subtitles", translate(locale, caption.name)) %>
</option>
<% end %>
</select>
</div>
<button type="submit" class="pure-button pure-button-primary">
<b><%= translate(locale, "Download") %></b>
</button>
</form>
<% end %>
<%= Invidious::Frontend::WatchPage.download_widget(locale, video, video_assets) %>
<p id="views"><i class="icon ion-ios-eye"></i> <%= number_with_separator(video.views) %></p>
<p id="likes"><i class="icon ion-ios-thumbs-up"></i> <%= number_with_separator(video.likes) %></p>