X-Git-Url: https://code.delx.au/youtube-cgi/blobdiff_plain/dff9fe7acc006eeadc47ac893890830ea8608ee8..3c8016a90cf19f0a07c56a5bb245906266b299ca:/youtube.cgi

diff --git a/youtube.cgi b/youtube.cgi
index f5845a4..6a5a92e 100755
--- a/youtube.cgi
+++ b/youtube.cgi
@@ -1,10 +1,9 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 
 from __future__ import division
 
 import cookielib
 import cgi
-import itertools
 import json
 from lxml import html
 import os
@@ -80,6 +79,9 @@ urlopener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookiejar))
 referrer = ""
 
 def urlopen(url, offset=None):
+	if url.startswith("//"):
+		url = "http:" + url
+
 	global referrer
 	req = urllib2.Request(url)
 	if referrer:
@@ -134,6 +136,11 @@ def get_player_config(doc):
 				p2 = line.rfind(";")
 				if p1 >= 0 and p2 > 0:
 					return json.loads(line[p1+1:p2])
+			if "ytplayer.config =" in line:
+				p1 = line.find("ytplayer.config =")
+				p2 = line.rfind(";")
+				if p1 >= 0 and p2 > 0:
+					return json.loads(line[p1+18:p2])
 			if "'PLAYER_CONFIG': " in line:
 				p1 = line.find(":")
 				if p1 >= 0:
@@ -141,29 +148,75 @@ def get_player_config(doc):
 					convert_from_old_itag(player_config)
 					return player_config
 
-def get_best_video(player_config):
-	url_data = urlparse.parse_qs(player_config["args"]["url_encoded_fmt_stream_map"])
-	url_data = itertools.izip_longest(
-		url_data["url"],
-		url_data["type"],
-		url_data["quality"],
-		url_data.get("sig", []),
+def extract_function(output, script, func_name):
+	p1 = script.find("function " + func_name + "(")
+	p2 = script.find("}", p1)
+	code = script[p1:p2+1]
+	output.append(code)
+	deps = re.findall(R"[^\.][= ]([\$0-9a-zA-Z]+)\(", code)
+	deps = set(deps)
+	deps.remove(func_name)
+	for dep in deps:
+		extract_function(output, script, dep)
+
+def decode_signature(js_url, s):
+	script = urlopen(js_url).read()
+	func_name = re.search(R"\b([a-zA-Z]+)\([a-zA-Z]+\.s\);", script).groups()[0]
+
+	codes = []
+	extract_function(codes, script, func_name)
+
+	p = subprocess.Popen(
+		"js",
+		shell=True,
+		close_fds=True,
+		stdin=subprocess.PIPE,
+		stdout=subprocess.PIPE
 	)
+	for code in codes:
+		p.stdin.write(code + "\n")
+	p.stdin.write("console.log(%s('%s'));\n" % (func_name, s))
+	p.stdin.close()
+
+	signature = p.stdout.read().strip()
+	if p.wait() != 0:
+		raise Exception("js failed to execute: %d" % p.returncode)
+
+	return signature
+
+def get_best_video(player_config):
+	url_data_list = player_config["args"]["url_encoded_fmt_stream_map"].split(",")
+	js_url = player_config["assets"]["js"]
+
 	best_url = None
 	best_quality = None
 	best_extension = None
-	for video_url, mimetype, quality, signature in url_data:
-		mimetype = mimetype.split(";")[0]
+	for url_data in url_data_list:
+		url_data = urlparse.parse_qs(url_data)
+		mimetype = url_data["type"][0].split(";")[0]
+		quality = url_data["quality"][0]
+
+		if quality not in QUALITIES:
+			continue
 		if mimetype not in MIMETYPES:
 			continue
+
 		extension = MIMETYPES[mimetype]
-		quality = QUALITIES.get(quality.split(",")[0], -1)
-		if best_quality is None or quality > best_quality:
-			if signature:
-				video_url = append_to_qs(video_url, {"signature": signature})
-			best_url = video_url
-			best_quality = quality
-			best_extension = extension
+		quality = QUALITIES.get(quality, -1)
+
+		if best_quality is not None and quality < best_quality:
+			continue
+
+		video_url = url_data["url"][0]
+		if "sig" in url_data:
+			signature = url_data["sig"][0]
+		else:
+			signature = decode_signature(js_url, url_data["s"][0])
+		video_url = append_to_qs(video_url, {"signature": signature})
+
+		best_url = video_url
+		best_quality = quality
+		best_extension = extension
 
 	return best_url, best_extension
 
@@ -320,7 +373,7 @@ def main():
 
 
 if __name__ == "__main__":
-	resource.setrlimit(resource.RLIMIT_AS, (MAX_MEMORY_BYTES, MAX_MEMORY_BYTES))
+###	resource.setrlimit(resource.RLIMIT_AS, (MAX_MEMORY_BYTES, MAX_MEMORY_BYTES))
 	if os.environ.has_key("SCRIPT_NAME"):
 		cgimain()
 	else: