From 98157bf1bf1223ffa7556d2d21cfac6f07675f9d Mon Sep 17 00:00:00 2001 From: James Taylor Date: Sat, 30 Jun 2018 23:34:46 -0700 Subject: initial commit --- youtube/comments.py | 166 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 youtube/comments.py (limited to 'youtube/comments.py') diff --git a/youtube/comments.py b/youtube/comments.py new file mode 100644 index 0000000..4b30a48 --- /dev/null +++ b/youtube/comments.py @@ -0,0 +1,166 @@ +import json +import youtube.proto as proto +import base64 +from youtube.common import uppercase_escape, default_multi_get, format_text_runs, URL_ORIGIN, fetch_url +from string import Template +import urllib.request +import urllib +import html +comment_template = Template(''' +
+
+ + + +
+ $author +
+ $text + + +$replies +
+ +
+''') +reply_link_template = Template(''' + View replies +''') +with open("yt_comments_template.html", "r") as file: + yt_comments_template = Template(file.read()) + + +# $replies_link_text + + +# Here's what I know about the secret key (starting with ASJN_i) +# *The secret key definitely contains the following information (or perhaps the information is stored at youtube's servers): +# -Video id +# -Offset +# -Sort +# *If the video id or sort in the ctoken contradicts the ASJN, the response is an error. The offset encoded outside the ASJN is ignored entirely. +# *The ASJN is base64 encoded data, indicated by the fact that the character after "ASJN_i" is one of ("0", "1", "2", "3") +# *The encoded data is not valid protobuf +# *The encoded data (after the 5 or so bytes that are always the same) is indistinguishable from random data according to a battery of randomness tests +# *The ASJN in the ctoken provided by a response changes in regular intervals of about a second or two. +# *Old ASJN's continue to work, and start at the same comment even if new comments have been posted since +# *The ASJN has no relation with any of the data in the response it came from + +def make_comment_ctoken(video_id, sort=0, offset=0, secret_key=''): + video_id = proto.as_bytes(video_id) + secret_key = proto.as_bytes(secret_key) + + + page_info = proto.string(4,video_id) + proto.uint(6, sort) + offset_information = proto.nested(4, page_info) + proto.uint(5, offset) + if secret_key: + offset_information = proto.string(1, secret_key) + offset_information + + result = proto.nested(2, proto.string(2, video_id)) + proto.uint(3,6) + proto.nested(6, offset_information) + return base64.urlsafe_b64encode(result).decode('ascii') + +mobile_headers = { + 'Host': 'm.youtube.com', + 'User-Agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1', + 'Accept': '*/*', + 'Accept-Language': 'en-US,en;q=0.5', + 'X-YouTube-Client-Name': '2', + 'X-YouTube-Client-Version': '1.20180613', +} +def request_comments(ctoken, replies=False): + if replies: # let's make it use different urls for no reason despite all the data being encoded + base_url = "https://m.youtube.com/watch_comment?action_get_comment_replies=1&ctoken=" + else: + base_url = "https://m.youtube.com/watch_comment?action_get_comments=1&ctoken=" + url = base_url + ctoken.replace("=", "%3D") + "&pbj=1" + print("Sending comments ajax request") + for i in range(0,8): # don't retry more than 8 times + content = fetch_url(url, headers=mobile_headers) + if content[0:4] == b")]}'": # random closing characters included at beginning of response for some reason + content = content[4:] + elif content[0:10] == b'\n, retrying") + continue + break + '''with open('comments_debug', 'wb') as f: + f.write(content)''' + return content + +def parse_comments(content, replies=False): + try: + content = json.loads(uppercase_escape(content.decode('utf-8'))) + #print(content) + comments_raw = content['content']['continuation_contents']['contents'] + ctoken = default_multi_get(content, 'content', 'continuation_contents', 'continuations', 0, 'continuation', default='') + + comments = [] + for comment_raw in comments_raw: + replies_url = '' + if not replies: + if comment_raw['replies'] is not None: + ctoken = comment_raw['replies']['continuations'][0]['continuation'] + replies_url = URL_ORIGIN + '/comments?ctoken=' + ctoken + "&replies=1" + comment_raw = comment_raw['comment'] + comment = { + 'author': comment_raw['author']['runs'][0]['text'], + 'author_url': comment_raw['author_endpoint']['url'], + 'author_avatar': comment_raw['author_thumbnail']['url'], + 'likes': comment_raw['like_count'], + 'published': comment_raw['published_time']['runs'][0]['text'], + 'text': comment_raw['content']['runs'], + 'reply_count': '', + 'replies_url': replies_url, + } + comments.append(comment) + except Exception as e: + print('Error parsing comments: ' + str(e)) + comments = () + ctoken = '' + else: + print("Finished getting and parsing comments") + return {'ctoken': ctoken, 'comments': comments} + +def get_comments_html(result): + html_result = '' + for comment in result['comments']: + replies = '' + if comment['replies_url']: + replies = reply_link_template.substitute(url=comment['replies_url']) + html_result += comment_template.substitute( + author=html.escape(comment['author']), + author_url = URL_ORIGIN + comment['author_url'], + author_avatar = '/' + comment['author_avatar'], + likes = str(comment['likes']) + ' likes' if str(comment['likes']) != '0' else '', + published = comment['published'], + text = format_text_runs(comment['text']), + datetime = '', #TODO + replies=replies, + #replies='', + ) + return html_result, result['ctoken'] + +def video_comments(video_id, sort=0, offset=0, secret_key=''): + result = parse_comments(request_comments(make_comment_ctoken(video_id, sort, offset, secret_key))) + return get_comments_html(result) + +more_comments_template = Template('''More comments''') + +def get_comments_page(query_string): + parameters = urllib.parse.parse_qs(query_string) + ctoken = parameters['ctoken'][0] + replies = default_multi_get(parameters, 'replies', 0, default="0") == "1" + + result = parse_comments(request_comments(ctoken, replies), replies) + comments_html, ctoken = get_comments_html(result) + if ctoken == '': + more_comments_button = '' + else: + more_comments_button = more_comments_template.substitute(url = URL_ORIGIN + '/comments?ctoken=' + ctoken) + + return yt_comments_template.substitute( + comments = comments_html, + page_title = 'Comments', + more_comments_button=more_comments_button, + ) + -- cgit v1.2.3