path for aws lambda
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AktanKasymaliev
parent
b2e804e977
commit
f386a5b743
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#!/usr/bin/env python3
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# this module is part of undetected_chromedriver
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import io
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import logging
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import os
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import random
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import re
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import string
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import sys
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import time
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import zipfile
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from distutils.version import LooseVersion
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from urllib.request import urlopen, urlretrieve
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import secrets
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logger = logging.getLogger(__name__)
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IS_POSIX = sys.platform.startswith(("darwin", "cygwin", "linux"))
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class Patcher(object):
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url_repo = "https://chromedriver.storage.googleapis.com"
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zip_name = "chromedriver_%s.zip"
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exe_name = "chromedriver%s"
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platform = sys.platform
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if platform.endswith("win32"):
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zip_name %= "win32"
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exe_name %= ".exe"
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if platform.endswith("linux"):
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zip_name %= "linux64"
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exe_name %= ""
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if platform.endswith("darwin"):
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zip_name %= "mac64"
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exe_name %= ""
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if platform.endswith("win32"):
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d = "~/appdata/roaming/undetected_chromedriver"
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elif 'LAMBDA_TASK_ROOT' in os.environ:
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d = "/tmp/undetected_chromedriver"
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elif platform.startswith("linux"):
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d = "~/.local/share/undetected_chromedriver"
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elif platform.endswith("darwin"):
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d = "~/Library/Application Support/undetected_chromedriver"
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else:
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d = "~/.undetected_chromedriver"
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data_path = os.path.abspath(os.path.expanduser(d))
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def __init__(self, executable_path=None, force=False, version_main: int = 0):
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"""
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Args:
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executable_path: None = automatic
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a full file path to the chromedriver executable
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force: False
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terminate processes which are holding lock
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version_main: 0 = auto
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specify main chrome version (rounded, ex: 82)
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"""
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self.force = force
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self.executable_path = None
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prefix = secrets.token_hex(8)
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if not os.path.exists(self.data_path):
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os.makedirs(self.data_path, exist_ok=True)
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if not executable_path:
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self.executable_path = os.path.join(
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self.data_path, "_".join([prefix, self.exe_name])
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)
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if not IS_POSIX:
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if executable_path:
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if not executable_path[-4:] == ".exe":
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executable_path += ".exe"
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self.zip_path = os.path.join(self.data_path, prefix)
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if not executable_path:
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self.executable_path = os.path.abspath(
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os.path.join(".", self.executable_path)
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)
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self._custom_exe_path = False
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if executable_path:
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self._custom_exe_path = True
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self.executable_path = executable_path
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self.version_main = version_main
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self.version_full = None
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def auto(self, executable_path=None, force=False, version_main=None):
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""""""
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if executable_path:
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self.executable_path = executable_path
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self._custom_exe_path = True
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if self._custom_exe_path:
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ispatched = self.is_binary_patched(self.executable_path)
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if not ispatched:
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return self.patch_exe()
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else:
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return
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if version_main:
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self.version_main = version_main
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if force is True:
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self.force = force
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try:
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os.unlink(self.executable_path)
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except PermissionError:
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if self.force:
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self.force_kill_instances(self.executable_path)
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return self.auto(force=not self.force)
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try:
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if self.is_binary_patched():
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# assumes already running AND patched
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return True
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except PermissionError:
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pass
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# return False
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except FileNotFoundError:
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pass
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release = self.fetch_release_number()
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self.version_main = release.version[0]
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self.version_full = release
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self.unzip_package(self.fetch_package())
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return self.patch()
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def patch(self):
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self.patch_exe()
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return self.is_binary_patched()
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def fetch_release_number(self):
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"""
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Gets the latest major version available, or the latest major version of self.target_version if set explicitly.
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:return: version string
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:rtype: LooseVersion
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"""
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path = "/latest_release"
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if self.version_main:
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path += f"_{self.version_main}"
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path = path.upper()
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logger.debug("getting release number from %s" % path)
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return LooseVersion(urlopen(self.url_repo + path).read().decode())
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def parse_exe_version(self):
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with io.open(self.executable_path, "rb") as f:
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for line in iter(lambda: f.readline(), b""):
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match = re.search(rb"platform_handle\x00content\x00([0-9.]*)", line)
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if match:
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return LooseVersion(match[1].decode())
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def fetch_package(self):
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"""
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Downloads ChromeDriver from source
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:return: path to downloaded file
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"""
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u = "%s/%s/%s" % (self.url_repo, self.version_full.vstring, self.zip_name)
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logger.debug("downloading from %s" % u)
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# return urlretrieve(u, filename=self.data_path)[0]
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return urlretrieve(u)[0]
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def unzip_package(self, fp):
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"""
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Does what it says
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:return: path to unpacked executable
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"""
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logger.debug("unzipping %s" % fp)
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try:
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os.unlink(self.zip_path)
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except (FileNotFoundError, OSError):
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pass
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os.makedirs(self.zip_path, mode=0o755, exist_ok=True)
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with zipfile.ZipFile(fp, mode="r") as zf:
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zf.extract(self.exe_name, self.zip_path)
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os.rename(os.path.join(self.zip_path, self.exe_name), self.executable_path)
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os.remove(fp)
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os.rmdir(self.zip_path)
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os.chmod(self.executable_path, 0o755)
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return self.executable_path
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@staticmethod
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def force_kill_instances(exe_name):
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"""
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kills running instances.
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:param: executable name to kill, may be a path as well
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:return: True on success else False
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"""
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exe_name = os.path.basename(exe_name)
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if IS_POSIX:
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r = os.system("kill -f -9 $(pidof %s)" % exe_name)
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else:
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r = os.system("taskkill /f /im %s" % exe_name)
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return not r
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@staticmethod
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def gen_random_cdc():
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cdc = random.choices(string.ascii_lowercase, k=26)
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cdc[-6:-4] = map(str.upper, cdc[-6:-4])
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cdc[2] = cdc[0]
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cdc[3] = "_"
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return "".join(cdc).encode()
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def is_binary_patched(self, executable_path=None):
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"""simple check if executable is patched.
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:return: False if not patched, else True
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"""
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executable_path = executable_path or self.executable_path
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with io.open(executable_path, "rb") as fh:
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for line in iter(lambda: fh.readline(), b""):
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if b"cdc_" in line:
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return False
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else:
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return True
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def patch_exe(self):
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"""
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Patches the ChromeDriver binary
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:return: False on failure, binary name on success
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"""
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logger.info("patching driver executable %s" % self.executable_path)
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linect = 0
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replacement = self.gen_random_cdc()
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with io.open(self.executable_path, "r+b") as fh:
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for line in iter(lambda: fh.readline(), b""):
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if b"cdc_" in line:
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fh.seek(-len(line), 1)
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newline = re.sub(b"cdc_.{22}", replacement, line)
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fh.write(newline)
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linect += 1
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return linect
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def __repr__(self):
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return "{0:s}({1:s})".format(
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self.__class__.__name__,
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self.executable_path,
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)
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def __del__(self):
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if self._custom_exe_path:
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# if the driver binary is specified by user
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# we assume it is important enough to not delete it
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return
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else:
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timeout = 3 # stop trying after this many seconds
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t = time.monotonic()
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while True:
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now = time.monotonic()
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if now - t > timeout:
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# we don't want to wait until the end of time
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logger.debug(
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"could not unlink %s in time (%d seconds)"
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% (self.executable_path, timeout)
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)
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break
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try:
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os.unlink(self.executable_path)
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logger.debug("successfully unlinked %s" % self.executable_path)
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break
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except (OSError, RuntimeError, PermissionError):
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time.sleep(0.1)
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continue
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except FileNotFoundError:
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break
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