mirror of
https://github.com/python/cpython
synced 2024-10-18 15:24:11 +00:00
0de65807e6
also modified check_all function to suppress all warnings since they aren't relevant to what this test is doing (allows quiet checking of regsub, for instance)
248 lines
7.2 KiB
Python
248 lines
7.2 KiB
Python
# Wrapper module for _socket, providing some additional facilities
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# implemented in Python.
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"""\
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This module provides socket operations and some related functions.
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On Unix, it supports IP (Internet Protocol) and Unix domain sockets.
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On other systems, it only supports IP. Functions specific for a
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socket are available as methods of the socket object.
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Functions:
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socket() -- create a new socket object
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fromfd() -- create a socket object from an open file descriptor [*]
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gethostname() -- return the current hostname
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gethostbyname() -- map a hostname to its IP number
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gethostbyaddr() -- map an IP number or hostname to DNS info
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getservbyname() -- map a service name and a protocol name to a port number
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getprotobyname() -- mape a protocol name (e.g. 'tcp') to a number
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ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
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htons(), htonl() -- convert 16, 32 bit int from host to network byte order
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inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
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inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
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ssl() -- secure socket layer support (only available if configured)
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[*] not available on all platforms!
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Special objects:
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SocketType -- type object for socket objects
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error -- exception raised for I/O errors
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Integer constants:
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AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
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SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)
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Many other constants may be defined; these may be used in calls to
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the setsockopt() and getsockopt() methods.
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"""
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from _socket import *
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import os, sys
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__all__ = ["getfqdn"]
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import _socket
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__all__.extend(os._get_exports_list(_socket))
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del _socket
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if (sys.platform.lower().startswith("win")
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or (hasattr(os, 'uname') and os.uname()[0] == "BeOS")):
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# be sure this happens only once, even in the face of reload():
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try:
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_realsocketcall
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except NameError:
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_realsocketcall = socket
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def socket(family, type, proto=0):
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return _socketobject(_realsocketcall(family, type, proto))
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# WSA error codes
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if sys.platform.lower().startswith("win"):
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errorTab = {}
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errorTab[10004] = "The operation was interrupted."
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errorTab[10009] = "A bad file handle was passed."
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errorTab[10013] = "Permission denied."
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errorTab[10014] = "A fault occurred on the network??" # WSAEFAULT
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errorTab[10022] = "An invalid operation was attempted."
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errorTab[10035] = "The socket operation would block"
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errorTab[10036] = "A blocking operation is already in progress."
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errorTab[10048] = "The network address is in use."
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errorTab[10054] = "The connection has been reset."
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errorTab[10058] = "The network has been shut down."
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errorTab[10060] = "The operation timed out."
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errorTab[10061] = "Connection refused."
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errorTab[10063] = "The name is too long."
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errorTab[10064] = "The host is down."
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errorTab[10065] = "The host is unreachable."
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del os, sys
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def getfqdn(name=''):
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"""Get fully qualified domain name from name.
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An empty argument is interpreted as meaning the local host.
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First the hostname returned by gethostbyaddr() is checked, then
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possibly existing aliases. In case no FQDN is available, hostname
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is returned.
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"""
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name = name.strip()
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if not name or name == '0.0.0.0':
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name = gethostname()
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try:
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hostname, aliases, ipaddrs = gethostbyaddr(name)
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except error:
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pass
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else:
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aliases.insert(0, hostname)
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for name in aliases:
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if '.' in name:
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break
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else:
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name = hostname
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return name
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#
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# These classes are used by the socket() defined on Windows and BeOS
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# platforms to provide a best-effort implementation of the cleanup
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# semantics needed when sockets can't be dup()ed.
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#
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# These are not actually used on other platforms.
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#
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class _socketobject:
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def __init__(self, sock):
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self._sock = sock
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def close(self):
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self._sock = 0
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def __del__(self):
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self.close()
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def accept(self):
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sock, addr = self._sock.accept()
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return _socketobject(sock), addr
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def dup(self):
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return _socketobject(self._sock)
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def makefile(self, mode='r', bufsize=-1):
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return _fileobject(self._sock, mode, bufsize)
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_s = "def %s(self, *args): return apply(self._sock.%s, args)\n\n"
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for _m in ('bind', 'connect', 'connect_ex', 'fileno', 'listen',
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'getpeername', 'getsockname',
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'getsockopt', 'setsockopt',
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'recv', 'recvfrom', 'send', 'sendto',
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'setblocking',
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'shutdown'):
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exec _s % (_m, _m)
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class _fileobject:
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def __init__(self, sock, mode, bufsize):
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self._sock = sock
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self._mode = mode
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if bufsize < 0:
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bufsize = 512
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self._rbufsize = max(1, bufsize)
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self._wbufsize = bufsize
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self._wbuf = self._rbuf = ""
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def close(self):
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try:
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if self._sock:
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self.flush()
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finally:
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self._sock = 0
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def __del__(self):
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self.close()
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def flush(self):
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if self._wbuf:
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self._sock.send(self._wbuf)
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self._wbuf = ""
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def fileno(self):
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return self._sock.fileno()
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def write(self, data):
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self._wbuf = self._wbuf + data
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if self._wbufsize == 1:
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if '\n' in data:
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self.flush()
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else:
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if len(self._wbuf) >= self._wbufsize:
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self.flush()
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def writelines(self, list):
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filter(self._sock.send, list)
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self.flush()
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def read(self, n=-1):
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if n >= 0:
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k = len(self._rbuf)
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if n <= k:
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data = self._rbuf[:n]
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self._rbuf = self._rbuf[n:]
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return data
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n = n - k
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L = [self._rbuf]
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self._rbuf = ""
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while n > 0:
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new = self._sock.recv(max(n, self._rbufsize))
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if not new: break
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k = len(new)
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if k > n:
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L.append(new[:n])
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self._rbuf = new[n:]
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break
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L.append(new)
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n = n - k
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return "".join(L)
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k = max(512, self._rbufsize)
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L = [self._rbuf]
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self._rbuf = ""
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while 1:
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new = self._sock.recv(k)
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if not new: break
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L.append(new)
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k = min(k*2, 1024**2)
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return "".join(L)
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def readline(self, limit=-1):
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data = ""
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i = self._rbuf.find('\n')
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while i < 0 and not (0 < limit <= len(self._rbuf)):
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new = self._sock.recv(self._rbufsize)
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if not new: break
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i = new.find('\n')
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if i >= 0: i = i + len(self._rbuf)
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self._rbuf = self._rbuf + new
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if i < 0: i = len(self._rbuf)
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else: i = i+1
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if 0 <= limit < len(self._rbuf): i = limit
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data, self._rbuf = self._rbuf[:i], self._rbuf[i:]
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return data
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def readlines(self, sizehint = 0):
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total = 0
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list = []
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while 1:
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line = self.readline()
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if not line: break
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list.append(line)
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total += len(line)
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if sizehint and total >= sizehint:
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break
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return list
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