/
AptOfflineCoreLib.py
2388 lines (2019 loc) · 116 KB
/
AptOfflineCoreLib.py
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############################################################################
# Copyright (C) 2005, 2020 Ritesh Raj Sarraf #
# rrs@researchut.com #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the #
# Free Software Foundation, Inc., #
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. #
############################################################################
import os
import sys
import shutil
import platform
import string
import ssl
import urllib.request, urllib.error, urllib.parse
import http.client
import queue
import threading
import subprocess
import socket
import tempfile
import random # to generate random directory names for installing multiple bundles in on go
import zipfile
import pydoc
import traceback
import argparse
from ssl import SSLError, SSLEOFError
import zlib
from apt_offline_core.AptOfflineLib import AptOfflineErrors, AptOfflineLibShutilError
FCNTL_LOCK = True
try:
import fcntl
except ImportError:
# Only available on platform Unix
FCNTL_LOCK = False
# On Debian, python-debianbts package provides this library
DebianBTS = True
try:
import debianbts
except ImportError:
try:
from apt_offline_core import AptOfflineDebianBtsLib as debianbts
except ImportError:
DebianBTS = False
try:
MagicLib = True
from apt_offline_core import AptOfflineMagicLib
except TypeError:
''' On Windows, the file magic library does not work '''
MagicLib = False
except AttributeError:
# On Linux, make sure libmagic is installed
MagicLib = False
#INFO: added to handle GUI interaction
guiBool = False
guiTerminateSignal = False # cancelling a download
guiMetaCompleted = False
totalSize = [0,0] # total_size, current_total
#INFO: Check if python-apt is installed
PythonApt = False
try:
import apt
import apt_pkg
from apt.debfile import DebPackage
PythonApt = True
except ImportError:
PythonApt = False
from apt_offline_core import AptOfflineLib
#INFO: Set the default timeout to 30 seconds for the packages that are being downloaded.
socket.setdefaulttimeout(30)
# How many times should we retry on socket timeouts
SOCKET_TIMEOUT_RETRY = 5
'''This is the core module. It does the main job of downloading packages/update packages,\n
figuring out if the packages are in the local cache, handling exceptions and many more stuff'''
app_name = "apt-offline"
version = "1.8.2"
myCopyright = "(C) 2005 - 2020 Ritesh Raj Sarraf"
terminal_license = "This program comes with ABSOLUTELY NO WARRANTY.\n\
This is free software, and you are welcome to redistribute it under\n\
the GNU GPL Version 3 (or later) License\n"
errlist = []
supported_platforms = ["Linux", "GNU/kFreeBSD", "GNU"]
apt_update_target_path = '/var/lib/apt/lists/partial'
apt_update_final_path = '/var/lib/apt/lists/'
apt_package_target_path = '/var/cache/apt/archives/partial/'
apt_package_final_path = '/var/cache/apt/archives/'
# Locks
apt_lists_lock = '/var/lib/apt/lists/lock'
apt_packages_lock = '/var/cache/apt/archives/lock'
apt_bug_file_format = "__apt__bug__report"
#These are spaces which will overwrite the progressbar left mess
LINE_OVERWRITE_SMALL = " " * 10
LINE_OVERWRITE_MID = " " * 30
LINE_OVERWRITE_FULL = " " * 60
Bool_Verbose = False
#Bool_TestWindows = True
log = AptOfflineLib.Log( Bool_Verbose, lock=True )
class FetchBugReports:
def __init__( self, apt_bug_file_format, ArchiveFile=None, lock=False, DownloadDir=None ):
self.bugsList = []
self.lock = lock
self.apt_bug = apt_bug_file_format
self.DownloadDir = DownloadDir
self.ArchiveFile = ArchiveFile
self.fileMgmt = AptOfflineLib.FileMgmt()
def FetchBugsDebian( self, PackageName):
'''0 => False
1 => No Bug Reports
2 => True'''
try:
self.bugs_list = debianbts.get_bugs(package=PackageName)
num_of_bugs = len(self.bugs_list)
except Exception:
log.verbose(traceback.format_exc())
log.err("Foreign exception raised in module debianbts\n")
log.err("Failed to download bug report for package %s\n" % (PackageName))
return 0
if num_of_bugs:
atleast_one_bug_report_downloaded = False
for eachBug in self.bugs_list:
# Fetch bug report..
# TODO: Handle exceptions later
try:
bugReport = debianbts.get_bug_log(eachBug)
except Exception:
#INFO: Some of these exceptions are sporadic. For example, this one was hit because of network timeout
# And we don't want the entire operation to fail because of this
log.warn("Foreign exception raised in module debianbts\n")
log.warn("Failed to download bug report for %s\nWill continue to download others\n" % (eachBug))
log.verbose(traceback.format_exc())
continue
# This tells us how many follow-ups for the bug report are present.
bugReportLength = bugReport.__len__()
writeBugReport = 0
self.fileName = os.path.join(tempfile.gettempdir(), PackageName + "{}" + str(eachBug) + "{}" + self.apt_bug)
file_handle = open( self.fileName, 'w' )
#TODO: Can we manipulate these headers in a more efficient way???
for line in bugReport[writeBugReport]['header'].split("\n"):
if line.startswith("Subject:"):
file_handle.write(line)
file_handle.write("\n")
break
while writeBugReport < bugReportLength:
file_handle.write(bugReport[writeBugReport]['body'])
file_handle.write("\n\n")
writeBugReport += 1
if writeBugReport < bugReportLength:
file_handle.write("Follow-Up #%d\n\n" % writeBugReport)
file_handle.flush()
file_handle.close()
#We're adding to an archive file here.
if self.ArchiveFile:
if self.AddToArchive( self.ArchiveFile, self.fileName ):
log.verbose("%s added to file %s\n" % (self.fileName, self.ArchiveFile))
else:
log.warn("%s failed to be added to file %s\n" % (self.fileName, self.ArchiveFile))
elif self.DownloadDir:
try:
if self.fileMgmt.move_file(self.fileName, self.DownloadDir):
log.verbose("%s added to download dir %s\n" % (self.fileName, self.DownloadDir))
except AptOfflineLibShutilError as msg:
log.warn("%s\n" % (msg))
atleast_one_bug_report_downloaded = True
if atleast_one_bug_report_downloaded:
return 2
else:
return 1
else:
#FIXME: When no bug reports are there, i.e. bug count is 0, we hit here
# We shouldn't be returning False
return 1
def AddToArchive(self, ArchiveFile, fileName):
try:
if self.compress_the_file(ArchiveFile, fileName):
if self.file_possibly_deleted is not True:
os.unlink(fileName)
except AptOfflineErrors as message:
log.warn("%s\n" % (message))
return True
class ExecCmd:
def __init__(self, Simulate=False):
self.Simulate = Simulate
def Simulate(self):
if self.Simulate is True:
pass
def ExecSystemCmd(self, cmd, sigFile=None):
'''
Execute command 'cmd' with subprocess module
Write stdout to sigFile, if provided
'''
if self.Simulate:
return True
if sigFile is None: #subprocess.call does take None as an arg
fh = None
else:
try:
fh = open(sigFile, 'a')
except Exception:
log.verbose(traceback.format_exc())
return False
if fh is not None:
preState = fh.tell()
log.verbose("Command is: %s\n" % (cmd))
p = subprocess.call(cmd, universal_newlines=True, stdout=fh)
if fh is not None:
fh.flush()
if p != 0:
#INFO: stderr will give us junk which our stripper() will not understand
# So, under that condition, truncate the data so that at least, our
# sig file is still usable
if fh is not None:
fh.truncate(preState)
fh.flush()
return False
return True
class AptManip(ExecCmd):
def __init__(self, OutputFile, Simulate=False, AptType="apt-get", AptReinstall=False):
ExecCmd.__init__(self, Simulate)
self.WriteTo = OutputFile
self.AptReinstall = AptReinstall
self.ShouldSimulate = Simulate
if AptType == "apt":
self.apt = "apt"
elif AptType == "apt-get":
self.apt = "apt-get"
elif AptType == "aptitude":
self.apt = "aptitude"
elif AptType == "python-apt":
self.apt = "python-apt"
else:
self.apt = "apt-get"
def Update(self):
log.verbose("APT Update Method is of type: %s\n" % self.apt)
if self.apt == "apt-get":
self.__AptGetUpdate()
elif self.apt == "apt":
self.__AptUpdate()
elif self.apt == "aptitude":
pass
elif self.apt == "python-apt":
self.__PythonAptUpdate()
else:
log.err("Method not supported")
sys.exit(1)
def Upgrade(self, UpgradeType="upgrade", ReleaseType=None):
log.verbose("APT Upgrade Method is of type: %s\n" % self.apt)
if self.apt == "apt-get":
self.__AptGetUpgrade(UpgradeType, ReleaseType)
elif self.apt == "apt":
self.__AptUpgrade(UpgradeType, ReleaseType)
elif self.apt == "aptitude":
pass
elif self.apt == "python-apt":
# Upgrade is broken in python-apt
# Hence for now, redirect to apt-get
self.__PythonAptUpgrade(UpgradeType, ReleaseType)
else:
log.err("Method not supported")
sys.exit(1)
def InstallPackages(self, PackageList, ReleaseType):
log.verbose("APT Install Method is of type: %s\n" % self.apt)
if self.apt == "apt-get":
self.__AptGetInstallPackage(PackageList, ReleaseType)
elif self.apt == "apt":
self.__AptInstallPackage(PackageList, ReleaseType)
elif self.apt == "python-apt":
self.__AptInstallPackage(PackageList, ReleaseType)
else:
log.err("Method not supported")
sys.exit(1)
def InstallSrcPackages(self, SrcPackageList, ReleaseType, BuildDependency):
log.verbose("APT Install Source Method is of type: %s\n" % self.apt)
if self.apt == "apt-get":
self.__AptGetInstallSrcPackages(SrcPackageList, ReleaseType, BuildDependency)
elif self.apt == "apt":
self.__AptInstallSrcPackages(SrcPackageList, ReleaseType, BuildDependency)
elif self.apt == "python-apt":
self.__AptInstallSrcPackages(SrcPackageList, ReleaseType, BuildDependency)
else:
log.err("Method not supported")
sys.exit(1)
def __FixAptSigs(self):
if self.ShouldSimulate is True:
log.msg("In simulation mode, no changes applied\n")
else:
for localFile in os.listdir(apt_update_target_path):
if localFile.endswith(".gpg.reverify"):
sig_file = localFile.rstrip(".reverify")
log.verbose("Recovering gpg signature %s.\n" % (localFile) )
localFile = os.path.join(apt_update_target_path, localFile)
os.rename(localFile, os.path.join(apt_update_final_path + sig_file) )
def __AptUpdate(self):
log.msg("Gathering details needed for 'update' operation\n")
if self.ExecSystemCmd(["/usr/bin/apt", "-qq", "--print-uris", "update"], self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
log.verbose("Calling __FixAptSigs to fix the apt sig problem")
self.__FixAptSigs()
def __AptGetUpdate(self):
log.msg("Gathering details needed for 'update' operation\n")
if self.ExecSystemCmd(["/usr/bin/apt-get", "-q", "--print-uris", "update"], self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
log.verbose("Calling __FixAptSigs to fix the apt sig problem")
self.__FixAptSigs()
def __AptitudeUpdate(self):
pass
def __PythonAptUpdate(self):
log.verbose("Open file %s for write" % self.WriteTo)
try:
self.writeFH = open(self.WriteTo, 'a')
except Exception:
log.verbose(traceback.format_exc())
log.err("Failed to open file %s for write. Exiting\n" % (self.WriteTo))
sys.exit(1)
log.msg("Gathering details needed for 'update' operation\n")
log.verbose("\nUsing Python apt interface\n")
apt_pkg.init_config()
apt_pkg.init_system()
acquire = apt_pkg.Acquire()
slist = apt_pkg.SourceList()
# Read the main list
slist.read_main_list()
# Add all indexes to the fetcher
slist.get_indexes(acquire, True)
# Now write the URI of every item
for item in acquire.items:
#INFO: For update files, there's no checksum present.
# Also, their size is not determined.
# Hence filesize is always returned '0'
# And checksum is something I'm writing as ':'
# We strip item.destfile because that's how apt-get had historically presented it to us
destFile = item.destfile.split("/")[-1]
self.writeFH.write("'" + item.desc_uri + "'" + " " + destFile + " " + str(item.filesize) + " " + ":" + "\n")
log.verbose("Writing string %s %s %d %s to file %s\n" % (item.desc_uri, destFile, item.filesize, ":", self.WriteTo) )
self.writeFH.flush()
self.writeFH.close()
def __PythonAptUpgrade(self, UpgradeType="upgrade", ReleaseType=None):
log.verbose("Open file %s for write\n" % self.WriteTo)
try:
self.writeFH = open(self.WriteTo, 'a')
except Exception:
log.verbose(traceback.format_exc())
log.err("Failed to open file %s for write. Exiting\n")
sys.exit(1)
log.msg("Gathering details needed for 'upgrade' operation\n")
log.warn("Option --upgrade-type not supported with this backend\n")
log.verbose("\nUsing Python apt interface\n")
cache = apt.Cache()
cache.open(None)
if UpgradeType == "dist-upgrade":
cache.upgrade(dist_upgrade=True)
elif UpgradeType == "upgrade":
cache.upgrade(dist_upgrade=False)
else:
cache.upgrade()
for pkg in cache.get_changes():
log.verbose("Generable data is: %s %s %d %s\n" % (pkg.candidate.uri, pkg.candidate.filename.split('/')[-1], pkg.candidate.size, pkg.candidate.md5))
self.writeFH.write("%s %s %d %s\n" % (pkg.candidate.uri, pkg.candidate.filename.split('/')[-1], pkg.candidate.size, pkg.candidate.md5))
self.writeFH.flush()
self.writeFH.close()
def __AptUpgrade(self, UpgradeType="upgrade", ReleaseType=None):
self.ReleaseType = ReleaseType
if ReleaseType is not None:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris", "-t"]
cmd.append(self.ReleaseType)
cmd.append(UpgradeType)
else:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris"]
cmd.append(UpgradeType)
log.msg("Gathering details needed for '%s' operation\n" % (UpgradeType) )
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err("FATAL: Something is wrong with the APT system\n")
def __AptGetUpgrade(self, UpgradeType="upgrade", ReleaseType=None):
self.ReleaseType = ReleaseType
if ReleaseType is not None:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris", "-t"]
cmd.append(self.ReleaseType)
cmd.append(UpgradeType)
else:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris"]
cmd.append(UpgradeType)
log.msg("Gathering details needed for '%s' operation\n" % (UpgradeType) )
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err("FATAL: Something is wrong with the APT system\n")
def __AptInstallPackage(self, PackageList=None, ReleaseType=None):
self.ReleaseType = ReleaseType
log.msg("Gathering installation details for package %s\n" % (PackageList) )
if self.ReleaseType is not None:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris", "install", "-t"]
cmd.append(self.ReleaseType)
else:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris", "install"]
for pkg in PackageList:
cmd.append(pkg)
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
def __AptInstallSrcPackages(self, SrcPackageList=None, ReleaseType=None, BuildDependency=False):
self.ReleaseType = ReleaseType
log.msg("Gathering installation details for source package %s\n" % (PackageList) )
if self.ReleaseType is not None:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris", "source", "-t"]
cmd.append(self.ReleaseType)
cmdBuildDep = ["/usr/bin/apt", "-qqq", "--print-uris", "build-dep", "-t"]
cmdBuildDep.append(self.ReleaseType)
else:
cmd = ["/usr/bin/apt", "-qqq", "--print-uris", "source"]
cmdBuildDep = ["/usr/bin/apt", "-qqq", "--print-uris", "build-dep"]
for pkg in SrcPackageList:
cmd.append(pkg)
cmdBuildDep.append(pkg)
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
if BuildDependency:
log.msg("Generating Build-Dependency for source packages %s.\n" % (SrcPackageList) )
if self.ExecSystemCmd(cmdBuildDep, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
def __AptGetInstallPackage(self, PackageList=None, ReleaseType=None):
self.ReleaseType = ReleaseType
log.msg("Gathering installation details for package %s\n" % (PackageList) )
if self.ReleaseType is not None:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris", "install", "-t"]
cmd.append(self.ReleaseType)
else:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris", "install"]
for pkg in PackageList:
cmd.append(pkg)
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
def __AptGetInstallSrcPackages(self, SrcPackageList=None, ReleaseType=None, BuildDependency=False):
self.ReleaseType = ReleaseType
log.msg("Gathering installation details for source package %s\n" % (SrcPackageList) )
if self.ReleaseType is not None:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris", "source", "-t"]
cmd.append(self.ReleaseType)
cmdBuildDep = ["/usr/bin/apt-get", "-qq", "--print-uris", "build-dep", "-t"]
cmdBuildDep.append(self.ReleaseType)
else:
cmd = ["/usr/bin/apt-get", "-qq", "--print-uris", "source"]
cmdBuildDep = ["/usr/bin/apt-get", "-qq", "--print-uris", "build-dep"]
for pkg in SrcPackageList:
cmd.append(pkg)
cmdBuildDep.append(pkg)
if self.ExecSystemCmd(cmd, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
if BuildDependency:
log.msg("Generating Build-Dependency for source packages %s.\n" % (SrcPackageList) )
if self.ExecSystemCmd(cmdBuildDep, self.WriteTo) is False:
log.err( "FATAL: Something is wrong with the apt system.\n" )
class APTVerifySigs(ExecCmd):
def __init__(self, gpgv=None, keyring=None, Simulate=False):
'''
Initialize keyring based on environment
Uses python-apt or apt-config
'''
ExecCmd.__init__(self, Simulate)
self.defaultPaths = []
if PythonApt is True:
apt_pkg.init()
self.defaultPaths.append(apt_pkg.config.find_dir('Dir::Etc::trustedparts'))
self.defaultPaths.append(apt_pkg.config.find_file('Dir::Etc::trusted'))
else:
command = b"""
# Unset variables in case they are set already
unset trusted
unset trustedparts
# Get the variables from apt
eval $(apt-config shell trusted Dir::Etc::trusted/f)
eval $(apt-config shell trustedparts Dir::Etc::trustedparts/d)
# Securely pass the variables back to python-apt
printf "%s\\0%s" "$trusted" "$trustedparts"
"""
process = subprocess.Popen(['sh'], stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
output = process.communicate(input=command)[0]
trusted, trustedparts = output.decode('utf-8').split('\x00')
log.verbose("trusted is %s and trustedparts is %s\n" % (trusted, trustedparts))
self.defaultPaths.append(trusted)
self.defaultPaths.append(trustedparts)
log.verbose("APT Signature verification path is: %s\n" % self.defaultPaths)
if gpgv is None:
self.gpgv="/usr/bin/gpgv"
else:
self.gpgv=gpgv
self.opts = []
if keyring is None:
self.opts.append("--ignore-time-conflict")
for eachPath in self.defaultPaths:
if os.path.isfile(eachPath):
self.opts.extend(["--keyring", eachPath])
elif os.path.isdir(eachPath):
for eachGPG in os.listdir(eachPath):
eachGPG = os.path.join(eachPath, eachGPG)
log.verbose("Adding %s to the apt-offline keyring\n" % (eachGPG) )
self.opts.extend(["--keyring", eachGPG])
if len(self.opts) == 1:
log.err("No valid keyring paths found in: %s\n" % (", ".join(self.defaultPaths)))
else:
self.opts.extend(["--keyring", keyring, "--ignore-time-conflict"])
def VerifySig(self, signature_file, signed_file):
if not os.access(signature_file, os.F_OK):
log.err("%s is bad. Can't proceed.\n" % (signature_file) )
return False
if not os.access(signed_file, os.F_OK):
log.err("%s is bad. Can't proceed.\n" % (signed_file) )
return False
#INFO: Commands can escape and inject. So carefully craft the command
# Thanks: Bernd Dietzel
gpgvCmd = []
gpgvCmd.append(self.gpgv)
gpgvCmd.extend(self.opts)
gpgvCmd.append(signature_file)
gpgvCmd.append(signed_file)
return self.ExecSystemCmd(gpgvCmd, None)
class LockAPT:
'''Manipulate locks on the APT Database'''
def __init__(self, lists, packages):
try:
self.listLock = os.open(lists, os.O_RDWR | os.O_TRUNC | os.O_CREAT, 0o640)
self.pkgLock = os.open(packages, os.O_RDWR | os.O_TRUNC | os.O_CREAT, 0o640)
except Exception:
log.verbose(traceback.format_exc())
log.err("Couldn't open lockfile\n")
return False
def lockLists(self):
try:
fcntl.lockf(self.listLock, fcntl.LOCK_EX | fcntl.LOCK_NB)
return True
except Exception:
log.verbose(traceback.format_exc())
return False
def lockPackages(self):
try:
fcntl.lockf(self.pkgLock, fcntl.LOCK_EX | fcntl.LOCK_NB)
return True
except Exception:
log.verbose(traceback.format_exc())
return False
def unlockLists(self):
try:
fcntl.lockf(self.listLock, fcntl.LOCK_UN)
return True
except Exception:
log.verbose(traceback.format_exc())
return False
def unlockPackages(self):
try:
fcntl.lockf(self.pkgLock, fcntl.LOCK_UN)
return True
except Exception:
log.verbose(traceback.format_exc())
return False
class GenericDownloadFunction():
def download_from_web(self, url, localFile, download_dir):
'''url = url to fetch
localFile = file to save to
donwload_dir = download path'''
block_size = 4096
i = 0
counter = 0
os.chdir(download_dir)
try:
temp = urllib.request.urlopen(url)
headers = temp.info()
size = int(headers['Content-Length'])
#INFO: Add the download thread into the Global ProgressBar Thread
self.addItem(size)
except urllib.error.HTTPError as errstring:
errfunc(errstring.code, errstring.reason, url)
return False
except urllib.error.URLError as errstring:
#INFO: Weird. But in urllib2.URLError, I noticed that for
# error type "timeouts", no errno was defined.
# errstring.errno was listed as None
# In my tests, wget categorized this behavior as:
# 504: gateway timeout
# So I am doing the same here.
if errstring.errno is None:
errfunc(504, errstring.reason, url)
else:
errfunc(errstring.errno, errstring.reason, url)
return False
except http.client.HTTPException as e:
log.err("Type HTTPException occurred")
log.err(e)
return False
except http.client.BadStatusLine as e:
#INFO: See Python Bug: https://bugs.python.org/issue8823
log.err("BadStatusLine exception: Python Bug 8823")
log.err(e)
return False
except socket.timeout:
log.err("Socket timeout. Skipping URL: %s\n" % (url))
return False
data = open(localFile,'wb')
socket_counter = 0
while i < size:
socket_timeout = None
try:
data.write (temp.read(block_size))
except socket.timeout:
socket_timeout = True
socket_counter += 1
except socket.error:
socket_timeout = True
socket_counter += 1
if socket_counter == SOCKET_TIMEOUT_RETRY:
errfunc(101010, "Max timeout retry count reached. Discontinuing download.\n", url)
# Clean the half downloaded file.
data.close()
os.unlink(localFile)
return False
if socket_timeout is True:
errfunc(10054, "Socket Timeout. Retry - %d\n" % (socket_counter) , url)
continue
increment = min(block_size, size - i)
i += block_size
counter += 1
self.updateValue(increment)
#REAL_PROGRESS: update current total in totalSize
if guiBool and not guiTerminateSignal:
totalSize[1] += block_size
if guiTerminateSignal:
data.close()
temp.close()
return False
self.completed()
data.close()
temp.close()
return True
# #FIXME: Find out optimal fix for this exception handling
# except OSError as erret:
# (errno, strerror) = erret
# errfunc(errno, strerror, download_dir)
# except IOError as e:
# if hasattr(e, 'reason'):
# log.err("%s\n" % (e.reason))
# if hasattr(e, 'code') and hasattr(e, 'reason'):
# errfunc(e.code, e.reason, localFile)
# except socket.timeout:
# errfunc(10054, "Socket timeout.\n", url)
class DownloadFromWeb(AptOfflineLib.ProgressBar, GenericDownloadFunction):
'''Class for DownloadFromWeb
This class also inherits progressbar functionalities from
parent class, ProgressBar'''
def __init__(self, width, total_items):
'''width = Progress Bar width'''
AptOfflineLib.ProgressBar.__init__(self, width=width, total_items=total_items)
def stripper(item):
'''Strips extra characters from "item".
Breaks "item" into:
url - The URL
localFile - The actual package file
size - The file size
checksum - The checksum string
and returns them.'''
log.verbose("Item before split is: %s\n" % (item))
try:
url, localFile, size, checksum = item.split(' ')
except ValueError:
#INFO: For apt metadata, no checksum is present
# For such case, set checksum to None
url, localFile, size = item.split(' ')
checksum = None
log.verbose("Item after split is: %s %s %s %s\n" % (url, localFile, size, checksum))
url = url.rstrip("'")
url = url.lstrip("'")
log.verbose("Stripped item URL is: %s\n" % url)
localFile = localFile.rstrip("'")
localFile = localFile.lstrip("'")
log.verbose("Stripped item FILE is: %s\n" % localFile)
try:
size = size.rstrip("'")
size = size.lstrip("'")
size = int(size)
except ValueError:
log.verbose("%s is malformed\n" % (" ".join(item) ) )
size = 0
log.verbose("Stripped item SIZE is: %d\n" % size)
#INFO: md5 ends up having '\n' with it.
# That needs to be stripped too.
if checksum:
checksum = checksum.rstrip("'")
checksum = checksum.lstrip("'")
checksum = checksum.rstrip("\n")
log.verbose("Stripped item CHECKSUM is: %s\n" % checksum)
return url, localFile, size, checksum
def errfunc(errno, errormsg, filename):
'''We use errfunc to handler errors.
There are some error codes (-3 and 13 as of now)
which are temporary codes, they happen when there
is a temporary resolution failure, for example.
For such situations, we can't abort because the
uri file might have other hosts also, which might
be well accessible.
This function does the job of behaving accordingly
as per the error codes.'''
retriable_error_codes = [-3, 13, 504, 404, 403, 401, 10060, 104, 101010]
# 104, 'Connection reset by peer'
# 504 is for gateway timeout
# 404 is for URL error. Page not found.
# 401 is for Restricted pages
# 10060 is for Operation Time out. There can be multiple reasons for this timeout
# 101010 is for socket max retry count
# 10054 is for Socket Timeout. Socket Timeout are seen during network congestion
#TODO: Find out what these error codes are for
# and better document them the next time you find it out.
# 13 is for "Permission Denied" when you don't have privileges to access the destination
if errno in retriable_error_codes:
log.verbose("%s - %s - %s %s\n" % (filename, errno, errormsg, LINE_OVERWRITE_FULL))
log.verbose("Will still try with other package uris\n")
elif errno == 10054:
log.err("%s - %s - %s %s\n" % (filename, errno, errormsg, LINE_OVERWRITE_FULL) )
elif errno == 407 or errno == 2:
# These, I believe are from OSError/IOError exception.
# I'll document it as soon as I confirm it.
log.err("%s\n" % (errormsg))
sys.exit(errno)
elif errno == 1:
log.err(errormsg)
log.err("Explicit program termination %s\n" % (errno))
sys.exit(errno)
else:
log.err("I don't understand this error code %s\nPlease file a bug report\n" % (errno))
def fetcher( args ):
# get opts
Str_GetArg = args.get
Int_SocketTimeout = args.socket_timeout
Str_DownloadDir = args.download_dir
Str_CacheDir = args.cache_dir
Bool_DisableMD5Check = args.disable_md5check
Int_NumOfThreads = args.num_of_threads
Str_BundleFile = args.bundle_file
Str_ProxyHost = args.proxy_host
Str_ProxyPort = args.proxy_port
Str_HttpsCertFile = args.https_cert_file
Str_HttpsKeyFile = args.https_key_file
Str_HttpBasicAuth = args.http_basicauth
Bool_DisableCertCheck = args.disable_cert_check
Bool_BugReports = args.deb_bugs
global guiTerminateSignal
if Int_SocketTimeout:
try:
Int_SocketTimeout.__int__()
socket.setdefaulttimeout( Int_SocketTimeout )
log.verbose( "Default timeout now is: %d.\n" % ( socket.getdefaulttimeout() ) )
except AttributeError:
log.err( "Incorrect value set for socket timeout.\n" )
sys.exit( 1 )
if Str_ProxyHost:
if Str_ProxyPort:
log.verbose(Str_ProxyHost + ":" + str(Str_ProxyPort))
proxy_support = urllib.request.ProxyHandler({'http': Str_ProxyHost + ":" + str(Str_ProxyPort) })
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
log.verbose("Proxy successfully set up with Host %s and port %d\n" % (Str_ProxyHost, Str_ProxyPort))
else:
proxy_support = urllib.request.ProxyHandler({'http': Str_ProxyHost})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
log.verbose("Proxy successfully set up with Host %s and default port\n" % (Str_ProxyHost) )
if (Str_HttpsCertFile and Str_HttpsKeyFile) or Bool_DisableCertCheck:
context = ssl.create_default_context()
if Bool_DisableCertCheck:
log.verbose("certificate checks for servers are ignored")
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
if Str_HttpsCertFile and Str_HttpsKeyFile:
log.verbose("cert-file:" + Str_HttpsCertFile + " key-file:" + Str_HttpsKeyFile)
context.load_cert_chain(Str_HttpsCertFile, Str_HttpsKeyFile)
opener = urllib.request.build_opener(urllib.request.HTTPSHandler(context=context))
urllib.request.install_opener(opener)
log.verbose("SSL Client Authentication successfully set up with certificate file %s and key file %s\n" % (Str_HttpsCertFile, Str_HttpsKeyFile))
if Str_HttpBasicAuth:
# create a password manager
password_mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
try:
for authstr in Str_HttpBasicAuth:
# Add the username and password.
parsedUrl = urllib.parse.urlparse(authstr)
username = parsedUrl.username
password = urllib.parse.unquote(parsedUrl.password)
top_level_url = parsedUrl.hostname
password_mgr.add_password(None, top_level_url, username, password)
log.verbose("Added user %s with pass %s auth to domain %s\n" % (username, password, top_level_url))
handler = urllib.request.HTTPBasicAuthHandler(password_mgr)
# create "opener" (OpenerDirector instance)
opener = urllib.request.build_opener(handler)
# Install the opener.
# Now all calls to urllib.request.urlopen use our opener.
urllib.request.install_opener(opener)
except:
log.err( "Incorrect value set for HttpBasicAuth.\n" )
sys.exit( 1 )
#INFO: Python 2.5 has hashlib which supports sha256
# If we don't have Python 2.5, disable MD5/SHA256 checksum
if AptOfflineLib.Python_2_5 is False:
Bool_DisableMD5Check = True
log.verbose( "\nMD5/SHA256 Checksum is being disabled. You need at least Python 2.5 to do checksum verification.\n" )
if Str_GetArg:
if os.path.isfile(Str_GetArg):
log.msg( "\nFetching APT Data\n\n" )
else:
log.err( "File %s not present. Check path.\n" % (Str_GetArg) )
sys.exit( 1 )
if Str_CacheDir:
if os.path.isdir( Str_CacheDir ) is False:
log.err( "WARNING: cache dir %s is incorrect. Did you give the full path ?\n" % (Str_CacheDir) )
sys.exit(1)
if not Str_DownloadDir and not Str_BundleFile:
log.err("Please provide a target download file/folder location.\n")
sys.exit(1)
if Str_DownloadDir:
if os.path.exists(Str_DownloadDir):
if os.path.isdir(Str_DownloadDir):
if os.access( Str_DownloadDir, os.W_OK ) is True:
Str_DownloadDir = os.path.abspath( Str_DownloadDir )
else:
log.err("Cannot write to directory %s\n" % (Str_DownloadDir))
sys.exit(1)
else:
log.err("%s is not a directory\n" % (Str_DownloadDir))
sys.exit(1)