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Victor Stinner's patch to make telnetlib use bytes 3725

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This commit is contained in:
Benjamin Peterson 2008-10-15 20:54:24 +00:00
parent 33b6450d23
commit 3de7fb86fc
3 changed files with 109 additions and 107 deletions
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12
Doc/library/telnetlib.rst
View file

@ -225,14 +225,14 @@ A simple example illustrating typical use::
tn = telnetlib.Telnet(HOST)
tn.read_until("login: ")
tn.write(user + "\n")
tn.read_until(b"login: ")
tn.write(user.encode('ascii') + b"\n")
if password:
tn.read_until("Password: ")
tn.write(password + "\n")
tn.read_until(b"Password: ")
tn.write(password.encode('ascii') + b"\n")
tn.write("ls\n")
tn.write("exit\n")
tn.write(b"ls\n")
tn.write(b"exit\n")
print(tn.read_all())

202
Lib/telnetlib.py
View file

@ -7,7 +7,7 @@
>>> from telnetlib import Telnet
>>> tn = Telnet('www.python.org', 79) # connect to finger port
>>> tn.write('guido\r\n')
>>> tn.write(b'guido\r\n')
>>> print(tn.read_all())
Login Name TTY Idle When Where
guido Guido van Rossum pts/2 <Dec 2 11:10> snag.cnri.reston..
@ -19,7 +19,7 @@
It is possible to pass a Telnet object to select.select() in order to
wait until more data is available. Note that in this case,
read_eager() may return '' even if there was data on the socket,
read_eager() may return b'' even if there was data on the socket,
because the protocol negotiation may have eaten the data. This is why
EOFError is needed in some cases to distinguish between "no data" and
"connection closed" (since the socket also appears ready for reading
@ -47,87 +47,87 @@
TELNET_PORT = 23
# Telnet protocol characters (don't change)
IAC = chr(255) # "Interpret As Command"
DONT = chr(254)
DO = chr(253)
WONT = chr(252)
WILL = chr(251)
theNULL = chr(0)
IAC = 255 # "Interpret As Command"
DONT = 254
DO = 253
WONT = 252
WILL = 251
theNULL = 0
SE = chr(240) # Subnegotiation End
NOP = chr(241) # No Operation
DM = chr(242) # Data Mark
BRK = chr(243) # Break
IP = chr(244) # Interrupt process
AO = chr(245) # Abort output
AYT = chr(246) # Are You There
EC = chr(247) # Erase Character
EL = chr(248) # Erase Line
GA = chr(249) # Go Ahead
SB = chr(250) # Subnegotiation Begin
SE = 240 # Subnegotiation End
NOP = 241 # No Operation
DM = 242 # Data Mark
BRK = 243 # Break
IP = 244 # Interrupt process
AO = 245 # Abort output
AYT = 246 # Are You There
EC = 247 # Erase Character
EL = 248 # Erase Line
GA = 249 # Go Ahead
SB = 250 # Subnegotiation Begin
# Telnet protocol options code (don't change)
# These ones all come from arpa/telnet.h
BINARY = chr(0) # 8-bit data path
ECHO = chr(1) # echo
RCP = chr(2) # prepare to reconnect
SGA = chr(3) # suppress go ahead
NAMS = chr(4) # approximate message size
STATUS = chr(5) # give status
TM = chr(6) # timing mark
RCTE = chr(7) # remote controlled transmission and echo
NAOL = chr(8) # negotiate about output line width
NAOP = chr(9) # negotiate about output page size
NAOCRD = chr(10) # negotiate about CR disposition
NAOHTS = chr(11) # negotiate about horizontal tabstops
NAOHTD = chr(12) # negotiate about horizontal tab disposition
NAOFFD = chr(13) # negotiate about formfeed disposition
NAOVTS = chr(14) # negotiate about vertical tab stops
NAOVTD = chr(15) # negotiate about vertical tab disposition
NAOLFD = chr(16) # negotiate about output LF disposition
XASCII = chr(17) # extended ascii character set
LOGOUT = chr(18) # force logout
BM = chr(19) # byte macro
DET = chr(20) # data entry terminal
SUPDUP = chr(21) # supdup protocol
SUPDUPOUTPUT = chr(22) # supdup output
SNDLOC = chr(23) # send location
TTYPE = chr(24) # terminal type
EOR = chr(25) # end or record
TUID = chr(26) # TACACS user identification
OUTMRK = chr(27) # output marking
TTYLOC = chr(28) # terminal location number
VT3270REGIME = chr(29) # 3270 regime
X3PAD = chr(30) # X.3 PAD
NAWS = chr(31) # window size
TSPEED = chr(32) # terminal speed
LFLOW = chr(33) # remote flow control
LINEMODE = chr(34) # Linemode option
XDISPLOC = chr(35) # X Display Location
OLD_ENVIRON = chr(36) # Old - Environment variables
AUTHENTICATION = chr(37) # Authenticate
ENCRYPT = chr(38) # Encryption option
NEW_ENVIRON = chr(39) # New - Environment variables
BINARY = 0 # 8-bit data path
ECHO = 1 # echo
RCP = 2 # prepare to reconnect
SGA = 3 # suppress go ahead
NAMS = 4 # approximate message size
STATUS = 5 # give status
TM = 6 # timing mark
RCTE = 7 # remote controlled transmission and echo
NAOL = 8 # negotiate about output line width
NAOP = 9 # negotiate about output page size
NAOCRD = 10 # negotiate about CR disposition
NAOHTS = 11 # negotiate about horizontal tabstops
NAOHTD = 12 # negotiate about horizontal tab disposition
NAOFFD = 13 # negotiate about formfeed disposition
NAOVTS = 14 # negotiate about vertical tab stops
NAOVTD = 15 # negotiate about vertical tab disposition
NAOLFD = 16 # negotiate about output LF disposition
XASCII = 17 # extended ascii character set
LOGOUT = 18 # force logout
BM = 19 # byte macro
DET = 20 # data entry terminal
SUPDUP = 21 # supdup protocol
SUPDUPOUTPUT = 22 # supdup output
SNDLOC = 23 # send location
TTYPE = 24 # terminal type
EOR = 25 # end or record
TUID = 26 # TACACS user identification
OUTMRK = 27 # output marking
TTYLOC = 28 # terminal location number
VT3270REGIME = 29 # 3270 regime
X3PAD = 30 # X.3 PAD
NAWS = 31 # window size
TSPEED = 32 # terminal speed
LFLOW = 33 # remote flow control
LINEMODE = 34 # Linemode option
XDISPLOC = 35 # X Display Location
OLD_ENVIRON = 36 # Old - Environment variables
AUTHENTICATION = 37 # Authenticate
ENCRYPT = 38 # Encryption option
NEW_ENVIRON = 39 # New - Environment variables
# the following ones come from
# http://www.iana.org/assignments/telnet-options
# Unfortunately, that document does not assign identifiers
# to all of them, so we are making them up
TN3270E = chr(40) # TN3270E
XAUTH = chr(41) # XAUTH
CHARSET = chr(42) # CHARSET
RSP = chr(43) # Telnet Remote Serial Port
COM_PORT_OPTION = chr(44) # Com Port Control Option
SUPPRESS_LOCAL_ECHO = chr(45) # Telnet Suppress Local Echo
TLS = chr(46) # Telnet Start TLS
KERMIT = chr(47) # KERMIT
SEND_URL = chr(48) # SEND-URL
FORWARD_X = chr(49) # FORWARD_X
PRAGMA_LOGON = chr(138) # TELOPT PRAGMA LOGON
SSPI_LOGON = chr(139) # TELOPT SSPI LOGON
PRAGMA_HEARTBEAT = chr(140) # TELOPT PRAGMA HEARTBEAT
EXOPL = chr(255) # Extended-Options-List
NOOPT = chr(0)
TN3270E = 40 # TN3270E
XAUTH = 41 # XAUTH
CHARSET = 42 # CHARSET
RSP = 43 # Telnet Remote Serial Port
COM_PORT_OPTION = 44 # Com Port Control Option
SUPPRESS_LOCAL_ECHO = 45 # Telnet Suppress Local Echo
TLS = 46 # Telnet Start TLS
KERMIT = 47 # KERMIT
SEND_URL = 48 # SEND-URL
FORWARD_X = 49 # FORWARD_X
PRAGMA_LOGON = 138 # TELOPT PRAGMA LOGON
SSPI_LOGON = 139 # TELOPT SSPI LOGON
PRAGMA_HEARTBEAT = 140 # TELOPT PRAGMA HEARTBEAT
EXOPL = 255 # Extended-Options-List
NOOPT = 0
class Telnet:
@ -197,13 +197,13 @@ def __init__(self, host=None, port=0,
self.port = port
self.timeout = timeout
self.sock = None
self.rawq = ''
self.rawq = b''
self.irawq = 0
self.cookedq = ''
self.cookedq = b''
self.eof = 0
self.iacseq = '' # Buffer for IAC sequence.
self.iacseq = b'' # Buffer for IAC sequence.
self.sb = 0 # flag for SB and SE sequence.
self.sbdataq = ''
self.sbdataq = b''
self.option_callback = None
if host is not None:
self.open(host, port, timeout)
@ -256,7 +256,7 @@ def close(self):
self.sock.close()
self.sock = 0
self.eof = 1
self.iacseq = ''
self.iacseq = b''
self.sb = 0
def get_socket(self):
@ -325,13 +325,13 @@ def read_all(self):
self.fill_rawq()
self.process_rawq()
buf = self.cookedq
self.cookedq = ''
self.cookedq = b''
return buf
def read_some(self):
"""Read at least one byte of cooked data unless EOF is hit.
Return '' if EOF is hit. Block if no data is immediately
Return b'' if EOF is hit. Block if no data is immediately
available.
"""
@ -340,14 +340,14 @@ def read_some(self):
self.fill_rawq()
self.process_rawq()
buf = self.cookedq
self.cookedq = ''
self.cookedq = b''
return buf
def read_very_eager(self):
"""Read everything that's possible without blocking in I/O (eager).
Raise EOFError if connection closed and no cooked data
available. Return '' if no cooked data available otherwise.
available. Return b'' if no cooked data available otherwise.
Don't block unless in the midst of an IAC sequence.
"""
@ -361,7 +361,7 @@ def read_eager(self):
"""Read readily available data.
Raise EOFError if connection closed and no cooked data
available. Return '' if no cooked data available otherwise.
available. Return b'' if no cooked data available otherwise.
Don't block unless in the midst of an IAC sequence.
"""
@ -375,7 +375,7 @@ def read_lazy(self):
"""Process and return data that's already in the queues (lazy).
Raise EOFError if connection closed and no data available.
Return '' if no cooked data available otherwise. Don't block
Return b'' if no cooked data available otherwise. Don't block
unless in the midst of an IAC sequence.
"""
@ -386,11 +386,11 @@ def read_very_lazy(self):
"""Return any data available in the cooked queue (very lazy).
Raise EOFError if connection closed and no data available.
Return '' if no cooked data available otherwise. Don't block.
Return b'' if no cooked data available otherwise. Don't block.
"""
buf = self.cookedq
self.cookedq = ''
self.cookedq = b''
if not buf and self.eof and not self.rawq:
raise EOFError('telnet connection closed')
return buf
@ -398,13 +398,13 @@ def read_very_lazy(self):
def read_sb_data(self):
"""Return any data available in the SB ... SE queue.
Return '' if no SB ... SE available. Should only be called
Return b'' if no SB ... SE available. Should only be called
after seeing a SB or SE command. When a new SB command is
found, old unread SB data will be discarded. Don't block.
"""
buf = self.sbdataq
self.sbdataq = ''
self.sbdataq = b''
return buf
def set_option_negotiation_callback(self, callback):
@ -418,14 +418,14 @@ def process_rawq(self):
the midst of an IAC sequence.
"""
buf = ['', '']
buf = [b'', b'']
try:
while self.rawq:
c = self.rawq_getchar()
if not self.iacseq:
if c == theNULL:
continue
if c == "\021":
if c == b"\021":
continue
if c != IAC:
buf[self.sb] = buf[self.sb] + c
@ -438,17 +438,17 @@ def process_rawq(self):
self.iacseq += c
continue
self.iacseq = ''
self.iacseq = b''
if c == IAC:
buf[self.sb] = buf[self.sb] + c
else:
if c == SB: # SB ... SE start.
self.sb = 1
self.sbdataq = ''
self.sbdataq = b''
elif c == SE:
self.sb = 0
self.sbdataq = self.sbdataq + buf[1]
buf[1] = ''
buf[1] = b''
if self.option_callback:
# Callback is supposed to look into
# the sbdataq
@ -460,7 +460,7 @@ def process_rawq(self):
self.msg('IAC %d not recognized' % ord(c))
elif len(self.iacseq) == 2:
cmd = self.iacseq[1]
self.iacseq = ''
self.iacseq = b''
opt = c
if cmd in (DO, DONT):
self.msg('IAC %s %d',
@ -477,7 +477,7 @@ def process_rawq(self):
else:
self.sock.sendall(IAC + DONT + opt)
except EOFError: # raised by self.rawq_getchar()
self.iacseq = '' # Reset on EOF
self.iacseq = b'' # Reset on EOF
self.sb = 0
pass
self.cookedq = self.cookedq + buf[0]
@ -494,10 +494,10 @@ def rawq_getchar(self):
self.fill_rawq()
if self.eof:
raise EOFError
c = self.rawq[self.irawq]
c = self.rawq[self.irawq:self.irawq+1]
self.irawq = self.irawq + 1
if self.irawq >= len(self.rawq):
self.rawq = ''
self.rawq = b''
self.irawq = 0
return c
@ -509,7 +509,7 @@ def fill_rawq(self):
"""
if self.irawq >= len(self.rawq):
self.rawq = ''
self.rawq = b''
self.irawq = 0
# The buffer size should be fairly small so as to avoid quadratic
# behavior in process_rawq() above
@ -536,10 +536,10 @@ def interact(self):
print('*** Connection closed by remote host ***')
break
if text:
sys.stdout.write(text)
sys.stdout.write(text.decode('ascii'))
sys.stdout.flush()
if sys.stdin in rfd:
line = sys.stdin.readline()
line = sys.stdin.readline().encode('ascii')
if not line:
break
self.write(line)

2
Misc/NEWS
View file

@ -31,6 +31,8 @@ Core and Builtins
Library
-------
- telnetlib now works completely in bytes.
- Issue #4072: Restore build_py_2to3.
- Issue #4014: Don't claim that Python has an Alpha release status, in addition