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feat: centralize ytInitialData parsing

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Théo Gaillard 2020-11-26 13:12:35 +01:00
parent 480d31eb5e
commit 1ba17a0e14
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3 changed files with 15 additions and 23 deletions
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33
src/invidious/channels.cr
View File

@ -775,41 +775,34 @@ def extract_channel_community_cursor(continuation)
cursor cursor
end end
INITDATA_PREQUERY = "window[\"ytInitialData\"] = {"
def get_about_info(ucid, locale) def get_about_info(ucid, locale)
about = YT_POOL.client &.get("/channel/#{ucid}/about?gl=US&hl=en") result = YT_POOL.client &.get("/channel/#{ucid}/about?gl=US&hl=en")
if about.status_code != 200 if result.status_code != 200
about = YT_POOL.client &.get("/user/#{ucid}/about?gl=US&hl=en") result = YT_POOL.client &.get("/user/#{ucid}/about?gl=US&hl=en")
end end
if md = about.headers["location"]?.try &.match(/\/channel\/(?<ucid>UC[a-zA-Z0-9_-]{22})/) if md = result.headers["location"]?.try &.match(/\/channel\/(?<ucid>UC[a-zA-Z0-9_-]{22})/)
raise ChannelRedirect.new(channel_id: md["ucid"]) raise ChannelRedirect.new(channel_id: md["ucid"])
end end
if about.status_code != 200 if result.status_code != 200
error_message = translate(locale, "This channel does not exist.") error_message = translate(locale, "This channel does not exist.")
raise error_message raise error_message
end end
initdata_pre = about.body.index(INITDATA_PREQUERY) about = XML.parse_html(result.body)
initdata_post = initdata_pre.nil? ? nil : about.body.index("};", initdata_pre)
if initdata_post.nil?
about = XML.parse_html(about.body)
error_message = about.xpath_node(%q(//div[@class="yt-alert-content"])).try &.content.strip
error_message ||= translate(locale, "Could not get channel info.")
raise error_message
end
initdata_pre = initdata_pre.not_nil! + INITDATA_PREQUERY.size - 1
initdata = JSON.parse(about.body[initdata_pre, initdata_post - initdata_pre + 1])
about = XML.parse_html(about.body)
if about.xpath_node(%q(//div[contains(@class, "channel-empty-message")])) if about.xpath_node(%q(//div[contains(@class, "channel-empty-message")]))
error_message = translate(locale, "This channel does not exist.") error_message = translate(locale, "This channel does not exist.")
raise error_message raise error_message
end end
initdata = extract_initial_data(result.body)
if initdata.empty?
error_message = about.xpath_node(%q(//div[@class="yt-alert-content"])).try &.content.strip
error_message ||= translate(locale, "Could not get channel info.")
raise error_message
end
author = about.xpath_node(%q(//meta[@name="title"])).not_nil!["content"] author = about.xpath_node(%q(//meta[@name="title"])).not_nil!["content"]
author_url = about.xpath_node(%q(//link[@rel="canonical"])).not_nil!["href"] author_url = about.xpath_node(%q(//link[@rel="canonical"])).not_nil!["href"]
author_thumbnail = about.xpath_node(%q(//link[@rel="image_src"])).not_nil!["href"] author_thumbnail = about.xpath_node(%q(//link[@rel="image_src"])).not_nil!["href"]

2
src/invidious/helpers/helpers.cr
View File

@ -598,7 +598,7 @@ def create_notification_stream(env, topics, connection_channel)
end end
def extract_initial_data(body) : Hash(String, JSON::Any) def extract_initial_data(body) : Hash(String, JSON::Any)
return JSON.parse(body.match(/(window\["ytInitialData"\]|var\s*ytInitialData)\s*=\s*(?<info>\{.*?\});/).try &.["info"] || "{}").as_h return JSON.parse(body.match(/(window\["ytInitialData"\]|var\s*ytInitialData)\s*=\s*(?<info>\{.*?\});/m).try &.["info"] || "{}").as_h
end end
def proxy_file(response, env) def proxy_file(response, env)

3
src/invidious/videos.cr
View File

@ -839,8 +839,7 @@ def extract_polymer_config(body)
params[f] = player_response[f] if player_response[f]? params[f] = player_response[f] if player_response[f]?
end end
yt_initial_data = body.match(/(window\["ytInitialData"\]|var\s+ytInitialData)\s*=\s*(?<info>.*?);\s*\n/) yt_initial_data = extract_initial_data(body)
.try { |r| JSON.parse(r["info"]).as_h }
params["relatedVideos"] = yt_initial_data.try &.["playerOverlays"]?.try &.["playerOverlayRenderer"]? params["relatedVideos"] = yt_initial_data.try &.["playerOverlays"]?.try &.["playerOverlayRenderer"]?
.try &.["endScreen"]?.try &.["watchNextEndScreenRenderer"]?.try &.["results"]?.try &.as_a.compact_map { |r| .try &.["endScreen"]?.try &.["watchNextEndScreenRenderer"]?.try &.["results"]?.try &.as_a.compact_map { |r|