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
@@ -194,7 +197,9 @@ def putcmd(self, line):
194 197
# Internal: return one line from the server, stripping CRLF.
195 198
# Raise EOFError if the connection is closed
196 199
def getline(self):
197 -
line = self.file.readline()
200 +
line = self.file.readline(self.maxline + 1)
201 +
if len(line) > self.maxline:
202 +
raise Error("got more than %d bytes" % self.maxline)
198 203
if self.debugging > 1:
199 204
print('*get*', self.sanitize(line))
200 205
if not line: raise EOFError
@@ -446,7 +451,9 @@ def retrlines(self, cmd, callback = None):
446 451
with self.transfercmd(cmd) as conn, \
447 452
conn.makefile('r', encoding=self.encoding) as fp:
448 453
while 1:
449 -
line = fp.readline()
454 +
line = fp.readline(self.maxline + 1)
455 +
if len(line) > self.maxline:
456 +
raise Error("got more than %d bytes" % self.maxline)
450 457
if self.debugging > 2: print('*retr*', repr(line))
451 458
if not line:
452 459
break
@@ -496,7 +503,9 @@ def storlines(self, cmd, fp, callback=None):
496 503
self.voidcmd('TYPE A')
497 504
with self.transfercmd(cmd) as conn:
498 505
while 1:
499 -
buf = fp.readline()
506 +
buf = fp.readline(self.maxline + 1)
507 +
if len(buf) > self.maxline:
508 +
raise Error("got more than %d bytes" % self.maxline)
500 509
if not buf: break
501 510
if buf[-2:] != B_CRLF:
502 511
if buf[-1] in B_CRLF: buf = buf[:-1]
@@ -773,7 +782,9 @@ def retrlines(self, cmd, callback = None):
773 782
fp = conn.makefile('r', encoding=self.encoding)
774 783
with fp, conn:
775 784
while 1:
776 -
line = fp.readline()
785 +
line = fp.readline(self.maxline + 1)
786 +
if len(line) > self.maxline:
787 +
raise Error("got more than %d bytes" % self.maxline)
777 788
if self.debugging > 2: print('*retr*', repr(line))
778 789
if not line:
779 790
break
@@ -804,7 +815,9 @@ def storlines(self, cmd, fp, callback=None):
804 815
self.voidcmd('TYPE A')
805 816
with self.transfercmd(cmd) as conn:
806 817
while 1:
807 -
buf = fp.readline()
818 +
buf = fp.readline(self.maxline + 1)
819 +
if len(buf) > self.maxline:
820 +
raise Error("got more than %d bytes" % self.maxline)
808 821
if not buf: break
809 822
if buf[-2:] != B_CRLF:
810 823
if buf[-1] in B_CRLF: buf = buf[:-1]
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