49 49 50 50
# The standard FTP server control port
51 51
FTP_PORT = 21
52 +
# The sizehint parameter passed to readline() calls
53 +
MAXLINE = 8192
52 54 53 55 54 56
# Exception raised when an error or invalid response is received
@@ -96,6 +98,7 @@ class FTP:
96 98
debugging = 0
97 99
host = ''
98 100
port = FTP_PORT
101 +
maxline = MAXLINE
99 102
sock = None
100 103
file = None
101 104
welcome = None
@@ -190,7 +193,9 @@ def putcmd(self, line):
190 193
# Internal: return one line from the server, stripping CRLF.
191 194
# Raise EOFError if the connection is closed
192 195
def getline(self):
193 -
line = self.file.readline()
196 +
line = self.file.readline(self.maxline + 1)
197 +
if len(line) > self.maxline:
198 +
raise Error("got more than %d bytes" % self.maxline)
194 199
if self.debugging > 1:
195 200
print('*get*', self.sanitize(line))
196 201
if not line: raise EOFError
@@ -444,7 +449,9 @@ def retrlines(self, cmd, callback = None):
444 449
with self.transfercmd(cmd) as conn, \
445 450
conn.makefile('r', encoding=self.encoding) as fp:
446 451
while 1:
447 -
line = fp.readline()
452 +
line = fp.readline(self.maxline + 1)
453 +
if len(line) > self.maxline:
454 +
raise Error("got more than %d bytes" % self.maxline)
448 455
if self.debugging > 2: print('*retr*', repr(line))
449 456
if not line:
450 457
break
@@ -494,7 +501,9 @@ def storlines(self, cmd, fp, callback=None):
494 501
self.voidcmd('TYPE A')
495 502
with self.transfercmd(cmd) as conn:
496 503
while 1:
497 -
buf = fp.readline()
504 +
buf = fp.readline(self.maxline + 1)
505 +
if len(buf) > self.maxline:
506 +
raise Error("got more than %d bytes" % self.maxline)
498 507
if not buf: break
499 508
if buf[-2:] != B_CRLF:
500 509
if buf[-1] in B_CRLF: buf = buf[:-1]
@@ -741,7 +750,9 @@ def retrlines(self, cmd, callback = None):
741 750
fp = conn.makefile('r', encoding=self.encoding)
742 751
try:
743 752
while 1:
744 -
line = fp.readline()
753 +
line = fp.readline(self.maxline + 1)
754 +
if len(line) > self.maxline:
755 +
raise Error("got more than %d bytes" % self.maxline)
745 756
if self.debugging > 2: print('*retr*', repr(line))
746 757
if not line:
747 758
break
@@ -779,7 +790,9 @@ def storlines(self, cmd, fp, callback=None):
779 790
conn = self.transfercmd(cmd)
780 791
try:
781 792
while 1:
782 -
buf = fp.readline()
793 +
buf = fp.readline(self.maxline + 1)
794 +
if len(buf) > self.maxline:
795 +
raise Error("got more than %d bytes" % self.maxline)
783 796
if not buf: break
784 797
if buf[-2:] != B_CRLF:
785 798
if buf[-1] in B_CRLF: buf = buf[:-1]
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