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helper.py
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helper.py
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import os
import stat
import socket
import struct
import re
import collections
import time
import logging
import base64
import gevent
if "inet_pton" not in dir(socket):
import win_inet_pton
from Config import config
def atomicWrite(dest, content, mode="w"):
try:
with open(dest + "-tmpnew", mode) as f:
f.write(content)
f.flush()
os.fsync(f.fileno())
if os.path.isfile(dest + "-tmpold"): # Previous incomplete write
os.rename(dest + "-tmpold", dest + "-tmpold-%s" % time.time())
if os.path.isfile(dest): # Rename old file to -tmpold
os.rename(dest, dest + "-tmpold")
os.rename(dest + "-tmpnew", dest)
os.unlink(dest + "-tmpold") # Remove old file
return True
except Exception, err:
from Debug import Debug
logging.error(
"File %s write failed: %s, reverting..." %
(dest, Debug.formatException(err))
)
if os.path.isfile(dest + "-tmpold") and not os.path.isfile(dest):
os.rename(dest + "-tmpold", dest)
return False
def openLocked(path, mode="w"):
if os.name == "posix":
import fcntl
f = open(path, mode)
fcntl.flock(f, fcntl.LOCK_EX | fcntl.LOCK_NB)
elif os.name == "nt":
import msvcrt
f = open(path, mode)
msvcrt.locking(f.fileno(), msvcrt.LK_NBLCK, -1)
else:
f = open(path, mode)
return f
def getFreeSpace():
free_space = -1
if "statvfs" in dir(os): # Unix
statvfs = os.statvfs(config.data_dir.encode("utf8"))
free_space = statvfs.f_frsize * statvfs.f_bavail
else: # Windows
try:
import ctypes
free_space_pointer = ctypes.c_ulonglong(0)
ctypes.windll.kernel32.GetDiskFreeSpaceExW(
ctypes.c_wchar_p(config.data_dir), None, None, ctypes.pointer(free_space_pointer)
)
free_space = free_space_pointer.value
except Exception, err:
logging.error("GetFreeSpace error: %s" % err)
return free_space
def sqlquote(value):
if type(value) is int:
return str(value)
else:
return "'%s'" % value.replace("'", "''")
def shellquote(*args):
if len(args) == 1:
return '"%s"' % args[0].replace('"', "")
else:
return tuple(['"%s"' % arg.replace('"', "") for arg in args])
def packPeers(peers):
packed_peers = {"ipv4": [], "ipv6": [], "onion": []}
for peer in peers:
try:
ip_type = getIpType(peer.ip)
packed_peers[ip_type].append(peer.packMyAddress())
except Exception:
logging.error("Error packing peer address: %s" % peer)
return packed_peers
# ip, port to packed 6byte or 18byte format
def packAddress(ip, port):
if ":" in ip:
return socket.inet_pton(socket.AF_INET6, ip) + struct.pack("H", port)
else:
return socket.inet_aton(ip) + struct.pack("H", port)
# From 6byte or 18byte format to ip, port
def unpackAddress(packed):
if len(packed) == 18:
return socket.inet_ntop(socket.AF_INET6, packed[0:16]), struct.unpack_from("H", packed, 16)[0]
else:
assert len(packed) == 6, "Invalid length ip4 packed address: %s" % len(packed)
return socket.inet_ntoa(packed[0:4]), struct.unpack_from("H", packed, 4)[0]
# onion, port to packed 12byte format
def packOnionAddress(onion, port):
onion = onion.replace(".onion", "")
return base64.b32decode(onion.upper()) + struct.pack("H", port)
# From 12byte format to ip, port
def unpackOnionAddress(packed):
return base64.b32encode(packed[0:-2]).lower() + ".onion", struct.unpack("H", packed[-2:])[0]
# Get dir from file
# Return: data/site/content.json -> data/site/
def getDirname(path):
if "/" in path:
return path[:path.rfind("/") + 1].lstrip("/")
else:
return ""
# Get dir from file
# Return: data/site/content.json -> content.json
def getFilename(path):
return path[path.rfind("/") + 1:]
def getFilesize(path):
try:
s = os.stat(path)
except:
return None
if stat.S_ISREG(s.st_mode): # Test if it's file
return s.st_size
else:
return None
# Convert hash to hashid for hashfield
def toHashId(hash):
return int(hash[0:4], 16)
# Merge dict values
def mergeDicts(dicts):
back = collections.defaultdict(set)
for d in dicts:
for key, val in d.iteritems():
back[key].update(val)
return dict(back)
# Request https url using gevent SSL error workaround
def httpRequest(url, as_file=False):
if url.startswith("http://"):
import urllib
response = urllib.urlopen(url)
else: # Hack to avoid Python gevent ssl errors
import socket
import httplib
import ssl
host, request = re.match("https://(.*?)(/.*?)$", url).groups()
conn = httplib.HTTPSConnection(host)
sock = socket.create_connection((conn.host, conn.port), conn.timeout, conn.source_address)
conn.sock = ssl.wrap_socket(sock, conn.key_file, conn.cert_file)
conn.request("GET", request)
response = conn.getresponse()
if response.status in [301, 302, 303, 307, 308]:
logging.info("Redirect to: %s" % response.getheader('Location'))
response = httpRequest(response.getheader('Location'))
if as_file:
import cStringIO as StringIO
data = StringIO.StringIO()
while True:
buff = response.read(1024 * 16)
if not buff:
break
data.write(buff)
return data
else:
return response
def timerCaller(secs, func, *args, **kwargs):
gevent.spawn_later(secs, timerCaller, secs, func, *args, **kwargs)
func(*args, **kwargs)
def timer(secs, func, *args, **kwargs):
gevent.spawn_later(secs, timerCaller, secs, func, *args, **kwargs)
def create_connection(address, timeout=None, source_address=None):
if address in config.ip_local:
sock = socket.create_connection_original(address, timeout, source_address)
else:
sock = socket.create_connection_original(address, timeout, socket.bind_addr)
return sock
def socketBindMonkeyPatch(bind_ip, bind_port):
import socket
logging.info("Monkey patching socket to bind to: %s:%s" % (bind_ip, bind_port))
socket.bind_addr = (bind_ip, int(bind_port))
socket.create_connection_original = socket.create_connection
socket.create_connection = create_connection
def limitedGzipFile(*args, **kwargs):
import gzip
class LimitedGzipFile(gzip.GzipFile):
def read(self, size=-1):
return super(LimitedGzipFile, self).read(1024 * 1024 * 25)
return LimitedGzipFile(*args, **kwargs)
def avg(items):
if len(items) > 0:
return sum(items) / len(items)
else:
return 0
def isIp(ip):
if ":" in ip: # IPv6
try:
socket.inet_pton(socket.AF_INET6, ip)
return True
except:
return False
else: # IPv4
try:
socket.inet_aton(ip)
return True
except:
return False
local_ip_pattern = re.compile(r"^127\.|192\.168\.|10\.|172\.1[6-9]\.|172\.2[0-9]\.|172\.3[0-1]\.|169\.254\.|::1$|fe80")
def isPrivateIp(ip):
return local_ip_pattern.match(ip)
def getIpType(ip):
if ip.endswith(".onion"):
return "onion"
elif ":" in ip:
return "ipv6"
else:
return "ipv4"
def createSocket(ip, sock_type=socket.SOCK_STREAM):
ip_type = getIpType(ip)
if ip_type == "ipv6":
return socket.socket(socket.AF_INET6, sock_type)
else:
return socket.socket(socket.AF_INET, sock_type)
def getInterfaceIps(ip_type="ipv4"):
res = []
if ip_type == "ipv6":
test_ips = ["ff0e::c", "2606:4700:4700::1111"]
else:
test_ips = ['239.255.255.250', "8.8.8.8"]
for test_ip in test_ips:
try:
s = createSocket(test_ip, sock_type=socket.SOCK_DGRAM)
s.connect((test_ip, 1))
res.append(s.getsockname()[0])
except:
pass
try:
res += [ip[4][0] for ip in socket.getaddrinfo(socket.gethostname(), 1)]
except:
pass
res = [re.sub("%.*", "", ip) for ip in res if getIpType(ip) == ip_type and isIp(ip)]
return list(set(res))