New Version

mediaflow_proxy/utils/packed.py

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+#Adapted for use in MediaFlowProxy from:
+#https://github.com/einars/js-beautify/blob/master/python/jsbeautifier/unpackers/packer.py
+# Unpacker for Dean Edward's p.a.c.k.e.r, a part of javascript beautifier
+# by Einar Lielmanis <einar@beautifier.io>
+#
+#     written by Stefano Sanfilippo <a.little.coder@gmail.com>
+#
+# usage:
+#
+# if detect(some_string):
+#     unpacked = unpack(some_string)
+#
+"""Unpacker for Dean Edward's p.a.c.k.e.r"""
+
+import re
+from bs4 import BeautifulSoup, SoupStrainer
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+
+
+def detect(source):
+    if "eval(function(p,a,c,k,e,d)" in source:
+        mystr = "smth"
+        return mystr is not None
+
+
+def unpack(source):
+    """Unpacks P.A.C.K.E.R. packed js code."""
+    payload, symtab, radix, count = _filterargs(source)
+
+    if count != len(symtab):
+        raise UnpackingError("Malformed p.a.c.k.e.r. symtab.")
+
+    try:
+        unbase = Unbaser(radix)
+    except TypeError:
+        raise UnpackingError("Unknown p.a.c.k.e.r. encoding.")
+
+    def lookup(match):
+        """Look up symbols in the synthetic symtab."""
+        word = match.group(0)
+        return symtab[unbase(word)] or word
+
+    payload = payload.replace("\\\\", "\\").replace("\\'", "'")
+    source = re.sub(r"\b\w+\b", lookup, payload)
+    return _replacestrings(source)
+
+
+def _filterargs(source):
+    """Juice from a source file the four args needed by decoder."""
+    juicers = [
+        (r"}\('(.*)', *(\d+|\[\]), *(\d+), *'(.*)'\.split\('\|'\), *(\d+), *(.*)\)\)"),
+        (r"}\('(.*)', *(\d+|\[\]), *(\d+), *'(.*)'\.split\('\|'\)"),
+    ]
+    for juicer in juicers:
+        args = re.search(juicer, source, re.DOTALL)
+        if args:
+            a = args.groups()
+            if a[1] == "[]":
+                a = list(a)
+                a[1] = 62
+                a = tuple(a)
+            try:
+                return a[0], a[3].split("|"), int(a[1]), int(a[2])
+            except ValueError:
+                raise UnpackingError("Corrupted p.a.c.k.e.r. data.")
+
+    # could not find a satisfying regex
+    raise UnpackingError(
+        "Could not make sense of p.a.c.k.e.r data (unexpected code structure)"
+    )
+
+
+def _replacestrings(source):
+    """Strip string lookup table (list) and replace values in source."""
+    match = re.search(r'var *(_\w+)\=\["(.*?)"\];', source, re.DOTALL)
+
+    if match:
+        varname, strings = match.groups()
+        startpoint = len(match.group(0))
+        lookup = strings.split('","')
+        variable = "%s[%%d]" % varname
+        for index, value in enumerate(lookup):
+            source = source.replace(variable % index, '"%s"' % value)
+        return source[startpoint:]
+    return source 
+
+
+class Unbaser(object):
+    """Functor for a given base. Will efficiently convert
+    strings to natural numbers."""
+
+    ALPHABET = {
+        62: "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",
+        95: (
+            " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+            "[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
+        ),
+    }
+
+    def __init__(self, base):
+        self.base = base
+
+        # fill elements 37...61, if necessary
+        if 36 < base < 62:
+            if not hasattr(self.ALPHABET, self.ALPHABET[62][:base]):
+                self.ALPHABET[base] = self.ALPHABET[62][:base]
+        # attrs = self.ALPHABET
+        # print ', '.join("%s: %s" % item for item in attrs.items())
+        # If base can be handled by int() builtin, let it do it for us
+        if 2 <= base <= 36:
+            self.unbase = lambda string: int(string, base)
+        else:
+            # Build conversion dictionary cache
+            try:
+                self.dictionary = dict(
+                    (cipher, index) for index, cipher in enumerate(self.ALPHABET[base])
+                )
+            except KeyError:
+                raise TypeError("Unsupported base encoding.")
+
+            self.unbase = self._dictunbaser
+
+    def __call__(self, string):
+        return self.unbase(string)
+
+    def _dictunbaser(self, string):
+        """Decodes a  value to an integer."""
+        ret = 0
+        for index, cipher in enumerate(string[::-1]):
+            ret += (self.base**index) * self.dictionary[cipher]
+        return ret
+class UnpackingError(Exception):
+    """Badly packed source or general error. Argument is a
+    meaningful description."""
+
+    pass
+
+
+
+async def eval_solver(self, url: str, headers):
+    try:
+        response = await self._make_request(url, headers = headers)
+        soup = BeautifulSoup(response.text, "lxml",parse_only=SoupStrainer("script"))
+        script_all = soup.find_all("script")
+        for i in script_all:
+            if detect(i.text):
+                unpacked_code = unpack(i.text)
+                match = re.search( r'file:"(.*?)"', unpacked_code)
+                if match:
+                    m3u8_url = match.group(1)
+                    return m3u8_url
+    except Exception as e:
+        logger.error("Eval solver error\n",e)
+        raise Exception("Error in eval_solver")