"small": 1,
}
-JS_BROWSER_STUB = """
-var window={};
-var document={};
-window.location={};
-var navigator={};
-"""
-
-
class VideoUnavailable(Exception):
pass
return json.loads(line[p1:p2])
def extract_js(script):
- PREFIX = "(function(){"
- SUFFIX = "})();\n"
+ PREFIX = "var _yt_player={};(function(g){var window=this;"
+ SUFFIX = ";})(_yt_player);\n"
assert script.startswith(PREFIX)
assert script.endswith(SUFFIX)
func_name = match.groups()[0]
return func_name
-def decode_signature(js_url, s):
+def decode_signature(js_url, signature):
script = urlopen(js_url).read()
func_name = find_func_name(script)
+ params = {
+ "func_name": func_name,
+ "signature": json.dumps(signature),
+ "code": json.dumps(extract_js(script)),
+ }
p = subprocess.Popen(
- "js",
+ "nodejs",
shell=True,
close_fds=True,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE
)
- w = p.stdin.write
- w(JS_BROWSER_STUB)
- w(extract_js(script))
- w("console.log(%s('%s'));\n" % (func_name, s))
+ js_decode_script = ("""
+ var vm = require('vm');
+
+ var sandbox = {
+ location: {
+ hash: '',
+ href: '',
+ protocol: 'http:'
+ },
+ history: {
+ pushState: function(){}
+ },
+ document: {},
+ navigator: {
+ userAgent: ''
+ },
+ signature: %(signature)s,
+ transformed_signature: null
+ };
+ sandbox.window = sandbox;
+
+ var code_string = %(code)s + ';';
+ var exec_string = 'transformed_signature = %(func_name)s(signature);';
+ vm.runInNewContext(code_string + exec_string, sandbox);
+
+ console.log(sandbox.transformed_signature);
+ """ % params)
+
+ p.stdin.write(js_decode_script)
p.stdin.close()
- signature = p.stdout.read().strip()
+ transformed_signature = p.stdout.read().strip()
if p.wait() != 0:
raise Exception("js failed to execute: %d" % p.returncode)
- return signature
+ return transformed_signature
def get_best_video(player_config):
url_data_list = player_config["args"]["url_encoded_fmt_stream_map"].split(",")