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Fix socket leaks #351

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Merged
vstinner merged 2 commits into from
Apr 3, 2017
Merged

Fix socket leaks #351

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bb98ca3
Fix socket leaks
it-x Feb 27, 2017
9ae87b8
Fixed sockets leak
it-x Mar 2, 2017
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86 changes: 48 additions & 38 deletions 86 Lib/ftplib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -412,12 +412,14 @@ def retrbinary(self, cmd, callback, blocksize=8192, rest=None):
"""
self.voidcmd('TYPE I')
conn = self.transfercmd(cmd, rest)
while 1:
data = conn.recv(blocksize)
if not data:
break
callback(data)
conn.close()
try:
while 1:
data = conn.recv(blocksize)
if not data:
break
callback(data)
finally:
conn.close()
return self.voidresp()

def retrlines(self, cmd, callback = None):
Expand All @@ -435,21 +437,25 @@ def retrlines(self, cmd, callback = None):
if callback is None: callback = print_line
resp = self.sendcmd('TYPE A')
conn = self.transfercmd(cmd)
fp = conn.makefile('rb')
while 1:
line = fp.readline(self.maxline + 1)
if len(line) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
if self.debugging > 2: print '*retr*', repr(line)
if not line:
break
if line[-2:] == CRLF:
line = line[:-2]
elif line[-1:] == '\n':
line = line[:-1]
callback(line)
fp.close()
conn.close()
fp = None
try:
fp = conn.makefile('rb')
while 1:
line = fp.readline(self.maxline + 1)
if len(line) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
if self.debugging > 2: print '*retr*', repr(line)
if not line:
break
if line[-2:] == CRLF:
line = line[:-2]
elif line[-1:] == '\n':
line = line[:-1]
callback(line)
finally:
if fp:
fp.close()

@serhiy-storchaka serhiy-storchaka Apr 2, 2017

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Can fp.close() fail? If yes, conn will be not closed.

@vstinner vstinner Apr 3, 2017

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The file is in read mode, I don't see why fp.close() would fail.

@vstinner vstinner Apr 3, 2017

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An alternative is to use two try/finally: conn and then fp. It would avoid "fp = None" as well. Do you think that it's worth it @serhiy-storchaka ?

@serhiy-storchaka serhiy-storchaka Apr 3, 2017

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KeyboardInterrupt ;-)

conn.close()
return self.voidresp()

def storbinary(self, cmd, fp, blocksize=8192, callback=None, rest=None):
Expand All @@ -469,12 +475,14 @@ def storbinary(self, cmd, fp, blocksize=8192, callback=None, rest=None):
"""
self.voidcmd('TYPE I')
conn = self.transfercmd(cmd, rest)
while 1:
buf = fp.read(blocksize)
if not buf: break
conn.sendall(buf)
if callback: callback(buf)
conn.close()
try:
while 1:
buf = fp.read(blocksize)
if not buf: break
conn.sendall(buf)
if callback: callback(buf)
finally:
conn.close()
return self.voidresp()

def storlines(self, cmd, fp, callback=None):
Expand All @@ -491,17 +499,19 @@ def storlines(self, cmd, fp, callback=None):
"""
self.voidcmd('TYPE A')
conn = self.transfercmd(cmd)
while 1:
buf = fp.readline(self.maxline + 1)
if len(buf) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
if not buf: break
if buf[-2:] != CRLF:
if buf[-1] in CRLF: buf = buf[:-1]
buf = buf + CRLF
conn.sendall(buf)
if callback: callback(buf)
conn.close()
try:
while 1:
buf = fp.readline(self.maxline + 1)
if len(buf) > self.maxline:
raise Error("got more than %d bytes" % self.maxline)
if not buf: break
if buf[-2:] != CRLF:
if buf[-1] in CRLF: buf = buf[:-1]
buf = buf + CRLF
conn.sendall(buf)
if callback: callback(buf)
finally:
conn.close()
return self.voidresp()

def acct(self, password):
Expand Down
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