diff --git a/src/invidious/channels.cr b/src/invidious/channels.cr index 3109b508..bbef3d4f 100644 --- a/src/invidious/channels.cr +++ b/src/invidious/channels.cr @@ -229,22 +229,8 @@ def fetch_channel(ucid, db, pull_all_videos = true, locale = nil) page = 1 LOGGER.trace("fetch_channel: #{ucid} : Downloading channel videos page") - response_body = get_channel_videos_response(ucid, page, auto_generated: auto_generated) - - videos = [] of SearchVideo - begin - initial_data = JSON.parse(response_body) - raise InfoException.new("Could not extract channel JSON") if !initial_data - - LOGGER.trace("fetch_channel: #{ucid} : Extracting videos from channel videos page initial_data") - videos = extract_videos(initial_data.as_h, author, ucid) - rescue ex - if response_body.includes?("To continue with your YouTube experience, please fill out the form below.") || - response_body.includes?("https://www.google.com/sorry/index") - raise InfoException.new("Could not extract channel info. Instance is likely blocked.") - end - raise ex - end + initial_data = get_channel_videos_response(ucid, page, auto_generated: auto_generated) + videos = extract_videos(initial_data, author, ucid) LOGGER.trace("fetch_channel: #{ucid} : Extracting videos from channel RSS feed") rss.xpath_nodes("//feed/entry").each do |entry| @@ -304,10 +290,8 @@ def fetch_channel(ucid, db, pull_all_videos = true, locale = nil) ids = [] of String loop do - response_body = get_channel_videos_response(ucid, page, auto_generated: auto_generated) - initial_data = JSON.parse(response_body) - raise InfoException.new("Could not extract channel JSON") if !initial_data - videos = extract_videos(initial_data.as_h, author, ucid) + initial_data = get_channel_videos_response(ucid, page, auto_generated: auto_generated) + videos = extract_videos(initial_data, author, ucid) count = videos.size videos = videos.map { |video| ChannelVideo.new({ @@ -358,8 +342,7 @@ end def fetch_channel_playlists(ucid, author, continuation, sort_by) if continuation response_json = request_youtube_api_browse(continuation) - result = JSON.parse(response_json) - continuationItems = result["onResponseReceivedActions"]? + continuationItems = response_json["onResponseReceivedActions"]? .try &.[0]["appendContinuationItemsAction"]["continuationItems"] return [] of SearchItem, nil if !continuationItems @@ -964,21 +947,16 @@ def get_60_videos(ucid, author, page, auto_generated, sort_by = "newest") videos = [] of SearchVideo 2.times do |i| - response_json = get_channel_videos_response(ucid, page * 2 + (i - 1), auto_generated: auto_generated, sort_by: sort_by) - initial_data = JSON.parse(response_json) - break if !initial_data - videos.concat extract_videos(initial_data.as_h, author, ucid) + initial_data = get_channel_videos_response(ucid, page * 2 + (i - 1), auto_generated: auto_generated, sort_by: sort_by) + videos.concat extract_videos(initial_data, author, ucid) end return videos.size, videos end def get_latest_videos(ucid) - response_json = get_channel_videos_response(ucid) - initial_data = JSON.parse(response_json) - return [] of SearchVideo if !initial_data + initial_data = get_channel_videos_response(ucid) author = initial_data["metadata"]?.try &.["channelMetadataRenderer"]?.try &.["title"]?.try &.as_s - items = extract_videos(initial_data.as_h, author, ucid) - return items + return extract_videos(initial_data, author, ucid) end diff --git a/src/invidious/helpers/youtube_api.cr b/src/invidious/helpers/youtube_api.cr index 30413532..544e635b 100644 --- a/src/invidious/helpers/youtube_api.cr +++ b/src/invidious/helpers/youtube_api.cr @@ -4,28 +4,116 @@ # Hard-coded constants required by the API HARDCODED_API_KEY = "AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8" -HARDCODED_CLIENT_VERS = "2.20210318.08.00" +HARDCODED_CLIENT_VERS = "2.20210330.08.00" -def request_youtube_api_browse(continuation) +#################################################################### +# make_youtube_api_context(region) +# +# Return, as a Hash, the "context" data required to request the +# youtube API endpoints. +# +def make_youtube_api_context(region : String | Nil) : Hash + return { + "client" => { + "hl" => "en", + "gl" => region || "US", # Can't be empty! + "clientName" => "WEB", + "clientVersion" => HARDCODED_CLIENT_VERS, + }, + } +end + +#################################################################### +# request_youtube_api_browse(continuation) +# request_youtube_api_browse(browse_id, params) +# +# Requests the youtubei/v1/browse endpoint with the required headers +# and POST data in order to get a JSON reply in english US that can +# be easily parsed. +# +# The requested data can either be: +# +# - A continuation token (ctoken). Depending on this token's +# contents, the returned data can be comments, playlist videos, +# search results, channel community tab, ... +# +# - A playlist ID (parameters MUST be an empty string) +# +def request_youtube_api_browse(continuation : String) # JSON Request data, required by the API data = { - "context": { - "client": { - "hl": "en", - "gl": "US", - "clientName": "WEB", - "clientVersion": HARDCODED_CLIENT_VERS, - }, - }, - "continuation": continuation, + "context" => make_youtube_api_context("US"), + "continuation" => continuation, + } + + return _youtube_api_post_json("/youtubei/v1/browse", data) +end + +def request_youtube_api_browse(browse_id : String, params : String) + # JSON Request data, required by the API + data = { + "browseId" => browse_id, + "context" => make_youtube_api_context("US"), } - # Send the POST request and return result + # Append the additionnal parameters if those were provided + # (this is required for channel info, playlist and community, e.g) + if params != "" + data["params"] = params + end + + return _youtube_api_post_json("/youtubei/v1/browse", data) +end + +#################################################################### +# request_youtube_api_search(search_query, params, region) +# +# Requests the youtubei/v1/search endpoint with the required headers +# and POST data in order to get a JSON reply. As the search results +# vary depending on the region, a region code can be specified in +# order to get non-US results. +# +# The requested data is a search string, with some additional +# paramters, formatted as a base64 string. +# +def request_youtube_api_search(search_query : String, params : String, region = nil) + # JSON Request data, required by the API + data = { + "query" => URI.encode_www_form(search_query), + "context" => make_youtube_api_context(region), + "params" => params, + } + + return _youtube_api_post_json("/youtubei/v1/search", data) +end + +#################################################################### +# _youtube_api_post_json(endpoint, data) +# +# Internal function that does the actual request to youtube servers +# and handles errors. +# +# The requested data is an endpoint (URL without the domain part) +# and the data as a Hash object. +# +def _youtube_api_post_json(endpoint, data) + # Send the POST request and parse result response = YT_POOL.client &.post( - "/youtubei/v1/browse?key=#{HARDCODED_API_KEY}", - headers: HTTP::Headers{"content-type" => "application/json"}, + "#{endpoint}?key=#{HARDCODED_API_KEY}", + headers: HTTP::Headers{"content-type" => "application/json; charset=UTF-8"}, body: data.to_json ) - return response.body + initial_data = JSON.parse(response.body).as_h + + # Error handling + if initial_data.has_key?("error") + code = initial_data["error"]["code"] + message = initial_data["error"]["message"].to_s.sub(/(\\n)+\^$/, "") + + raise InfoException.new("Could not extract JSON. Youtube API returned \ + error #{code} with message:
\"#{message}\"") + end + + return initial_data end diff --git a/src/invidious/playlists.cr b/src/invidious/playlists.cr index 073a9986..fe7f82f3 100644 --- a/src/invidious/playlists.cr +++ b/src/invidious/playlists.cr @@ -361,16 +361,7 @@ def fetch_playlist(plid, locale) plid = "UU#{plid.lchop("UC")}" end - response = YT_POOL.client &.get("/playlist?list=#{plid}&hl=en") - if response.status_code != 200 - if response.headers["location"]?.try &.includes? "/sorry/index" - raise InfoException.new("Could not extract playlist info. Instance is likely blocked.") - else - raise InfoException.new("Not a playlist.") - end - end - - initial_data = extract_initial_data(response.body) + initial_data = request_youtube_api_browse("VL" + plid, params: "") playlist_sidebar_renderer = initial_data["sidebar"]?.try &.["playlistSidebarRenderer"]?.try &.["items"]? raise InfoException.new("Could not extract playlistSidebarRenderer.") if !playlist_sidebar_renderer @@ -451,17 +442,12 @@ def get_playlist_videos(db, playlist, offset, locale = nil, continuation = nil) offset = (offset / 100).to_i64 * 100_i64 ctoken = produce_playlist_continuation(playlist.id, offset) - initial_data = JSON.parse(request_youtube_api_browse(ctoken)).as_h + initial_data = request_youtube_api_browse(ctoken) else - response = YT_POOL.client &.get("/playlist?list=#{playlist.id}&gl=US&hl=en") - initial_data = extract_initial_data(response.body) + initial_data = request_youtube_api_browse("VL" + playlist.id, params: "") end - if initial_data - return extract_playlist_videos(initial_data) - else - return [] of PlaylistVideo - end + return extract_playlist_videos(initial_data) end end diff --git a/src/invidious/search.cr b/src/invidious/search.cr index 4b216613..662173a0 100644 --- a/src/invidious/search.cr +++ b/src/invidious/search.cr @@ -246,8 +246,7 @@ def channel_search(query, page, channel) continuation = produce_channel_search_continuation(ucid, query, page) response_json = request_youtube_api_browse(continuation) - result = JSON.parse(response_json) - continuationItems = result["onResponseReceivedActions"]? + continuationItems = response_json["onResponseReceivedActions"]? .try &.[0]["appendContinuationItemsAction"]["continuationItems"] return 0, [] of SearchItem if !continuationItems @@ -264,14 +263,9 @@ end def search(query, search_params = produce_search_params(content_type: "all"), region = nil) return 0, [] of SearchItem if query.empty? - body = YT_POOL.client(region, &.get("/results?search_query=#{URI.encode_www_form(query)}&sp=#{search_params}&hl=en").body) - return 0, [] of SearchItem if body.empty? - - initial_data = extract_initial_data(body) + initial_data = request_youtube_api_search(query, search_params, region) items = extract_items(initial_data) - # initial_data["estimatedResults"]?.try &.as_s.to_i64 - return items.size, items end