Personal Computer World 2009 February/PCWFEB09.iso/Software/Linux/Kubuntu 8.10/kubuntu-8.10-desktop-i386.iso/casper/filesystem.squashfs/usr/lib/python2.5/socket.pyc

Python Compiled Bytecode | 2008-10-29 | 13KB | 468 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 2.5)

"""This module provides socket operations and some related functions.
On Unix, it supports IP (Internet Protocol) and Unix domain sockets.
On other systems, it only supports IP. Functions specific for a
socket are available as methods of the socket object.

Functions:

socket() -- create a new socket object
socketpair() -- create a pair of new socket objects [*]
fromfd() -- create a socket object from an open file descriptor [*]
gethostname() -- return the current hostname
gethostbyname() -- map a hostname to its IP number
gethostbyaddr() -- map an IP number or hostname to DNS info
getservbyname() -- map a service name and a protocol name to a port number
getprotobyname() -- mape a protocol name (e.g. 'tcp') to a number
ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
htons(), htonl() -- convert 16, 32 bit int from host to network byte order
inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
ssl() -- secure socket layer support (only available if configured)
socket.getdefaulttimeout() -- get the default timeout value
socket.setdefaulttimeout() -- set the default timeout value

 [*] not available on all platforms!

Special objects:

SocketType -- type object for socket objects
error -- exception raised for I/O errors
has_ipv6 -- boolean value indicating if IPv6 is supported

Integer constants:

AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)

Many other constants may be defined; these may be used in calls to
the setsockopt() and getsockopt() methods.
"""
import _socket
from _socket import *
_have_ssl = False

try:
    import _ssl
    from _ssl import *
    _have_ssl = True
except ImportError:
    pass

import os
import sys

try:
    from cStringIO import StringIO
except ImportError:
    from StringIO import StringIO


try:
    from errno import EBADF
except ImportError:
    EBADF = 9

__all__ = [
    'getfqdn']
__all__.extend(os._get_exports_list(_socket))
if _have_ssl:
    __all__.extend(os._get_exports_list(_ssl))

_realsocket = socket
if _have_ssl:
    _realssl = ssl

    def ssl(sock, keyfile = None, certfile = None):
        if hasattr(sock, '_sock'):
            sock = sock._sock

        return _realssl(sock, keyfile, certfile)


if sys.platform.lower().startswith('win'):
    errorTab = { }
    errorTab[10004] = 'The operation was interrupted.'
    errorTab[10009] = 'A bad file handle was passed.'
    errorTab[10013] = 'Permission denied.'
    errorTab[10014] = 'A fault occurred on the network??'
    errorTab[10022] = 'An invalid operation was attempted.'
    errorTab[10035] = 'The socket operation would block'
    errorTab[10036] = 'A blocking operation is already in progress.'
    errorTab[10048] = 'The network address is in use.'
    errorTab[10054] = 'The connection has been reset.'
    errorTab[10058] = 'The network has been shut down.'
    errorTab[10060] = 'The operation timed out.'
    errorTab[10061] = 'Connection refused.'
    errorTab[10063] = 'The name is too long.'
    errorTab[10064] = 'The host is down.'
    errorTab[10065] = 'The host is unreachable.'
    __all__.append('errorTab')


def getfqdn(name = ''):
    '''Get fully qualified domain name from name.

    An empty argument is interpreted as meaning the local host.

    First the hostname returned by gethostbyaddr() is checked, then
    possibly existing aliases. In case no FQDN is available, hostname
    from gethostname() is returned.
    '''
    name = name.strip()
    if not name or name == '0.0.0.0':
        name = gethostname()


    try:
        (hostname, aliases, ipaddrs) = gethostbyaddr(name)
    except error:
        pass

    aliases.insert(0, hostname)
    for name in aliases:
        if '.' in name:
            break
            continue
    else:
        name = hostname
    return name

_socketmethods = ('bind', 'connect', 'connect_ex', 'fileno', 'listen', 'getpeername', 'getsockname', 'getsockopt', 'setsockopt', 'sendall', 'setblocking', 'settimeout', 'gettimeout', 'shutdown')
if sys.platform == 'riscos':
    _socketmethods = _socketmethods + ('sleeptaskw',)

_delegate_methods = ('recv', 'recvfrom', 'recv_into', 'recvfrom_into', 'send', 'sendto')

class _closedsocket(object):
    __slots__ = []

    def _dummy(*args):
        raise error(EBADF, 'Bad file descriptor')

    send = recv = recv_into = sendto = recvfrom = recvfrom_into = _dummy
    __getattr__ = _dummy


class _socketobject(object):
    __doc__ = _realsocket.__doc__
    __slots__ = [
        '_sock',
        '__weakref__'] + list(_delegate_methods)

    def __init__(self, family = AF_INET, type = SOCK_STREAM, proto = 0, _sock = None):
        if _sock is None:
            _sock = _realsocket(family, type, proto)

        self._sock = _sock
        for method in _delegate_methods:
            setattr(self, method, getattr(_sock, method))



    def close(self):
        self._sock = _closedsocket()
        dummy = self._sock._dummy
        for method in _delegate_methods:
            setattr(self, method, dummy)


    close.__doc__ = _realsocket.close.__doc__

    def accept(self):
        (sock, addr) = self._sock.accept()
        return (_socketobject(_sock = sock), addr)

    accept.__doc__ = _realsocket.accept.__doc__

    def dup(self):
        '''dup() -> socket object

        Return a new socket object connected to the same system resource.'''
        return _socketobject(_sock = self._sock)


    def makefile(self, mode = 'r', bufsize = -1):
        '''makefile([mode[, bufsize]]) -> file object

        Return a regular file object corresponding to the socket.  The mode
        and bufsize arguments are as for the built-in open() function.'''
        return _fileobject(self._sock, mode, bufsize)

    family = property((lambda self: self._sock.family), doc = 'the socket family')
    type = property((lambda self: self._sock.type), doc = 'the socket type')
    proto = property((lambda self: self._sock.proto), doc = 'the socket protocol')
    _s = 'def %s(self, *args): return self._sock.%s(*args)\n\n%s.__doc__ = _realsocket.%s.__doc__\n'
    for _m in _socketmethods:
        exec _s % (_m, _m, _m, _m)

    del _m
    del _s

socket = SocketType = _socketobject

class _fileobject(object):
    '''Faux file object attached to a socket object.'''
    default_bufsize = 8192
    name = '<socket>'
    __slots__ = [
        'mode',
        'bufsize',
        'softspace',
        '_sock',
        '_rbufsize',
        '_wbufsize',
        '_rbuf',
        '_wbuf',
        '_close']

    def __init__(self, sock, mode = 'rb', bufsize = -1, close = False):
        self._sock = sock
        self.mode = mode
        if bufsize < 0:
            bufsize = self.default_bufsize

        self.bufsize = bufsize
        self.softspace = False
        if bufsize == 0:
            self._rbufsize = 1
        elif bufsize == 1:
            self._rbufsize = self.default_bufsize
        else:
            self._rbufsize = bufsize
        self._wbufsize = bufsize
        self._rbuf = StringIO()
        self._wbuf = []
        self._close = close


    def _getclosed(self):
        return self._sock is None

    closed = property(_getclosed, doc = 'True if the file is closed')

    def close(self):

        try:
            if self._sock:
                self.flush()
        finally:
            if self._close:
                self._sock.close()

            self._sock = None



    def __del__(self):

        try:
            self.close()
        except:
            pass



    def flush(self):
        if self._wbuf:
            buffer = ''.join(self._wbuf)
            self._wbuf = []
            self._sock.sendall(buffer)



    def fileno(self):
        return self._sock.fileno()


    def write(self, data):
        data = str(data)
        if not data:
            return None

        self._wbuf.append(data)
        if not self._wbufsize == 0:
            if self._wbufsize == 1 or '\n' in data or self._get_wbuf_len() >= self._wbufsize:
                self.flush()



    def writelines(self, list):
        self._wbuf.extend(filter(None, map(str, list)))
        if self._wbufsize <= 1 or self._get_wbuf_len() >= self._wbufsize:
            self.flush()



    def _get_wbuf_len(self):
        buf_len = 0
        for x in self._wbuf:
            buf_len += len(x)

        return buf_len


    def read(self, size = -1):
        rbufsize = max(self._rbufsize, self.default_bufsize)
        buf = self._rbuf
        buf.seek(0, 2)
        if size < 0:
            self._rbuf = StringIO()
            while True:
                data = self._sock.recv(rbufsize)
                if not data:
                    break

                buf.write(data)
            return buf.getvalue()
        else:
            buf_len = buf.tell()
            if buf_len >= size:
                buf.seek(0)
                rv = buf.read(size)
                self._rbuf = StringIO()
                self._rbuf.write(buf.read())
                return rv

            self._rbuf = StringIO()
            while True:
                left = size - buf_len
                data = self._sock.recv(left)
                if not data:
                    break

                n = len(data)
                if n == size and not buf_len:
                    return data

                if n == left:
                    buf.write(data)
                    del data
                    break

                if not n <= left:
                    raise AssertionError, 'recv(%d) returned %d bytes' % (left, n)
                buf.write(data)
                buf_len += n
                del data
            return buf.getvalue()


    def readline(self, size = -1):
        buf = self._rbuf
        buf.seek(0, 2)
        if buf.tell() > 0:
            buf.seek(0)
            bline = buf.readline(size)
            if bline.endswith('\n') or len(bline) == size:
                self._rbuf = StringIO()
                self._rbuf.write(buf.read())
                return bline

            del bline

        if size < 0:
            if self._rbufsize <= 1:
                buf.seek(0)
                buffers = [
                    buf.read()]
                self._rbuf = StringIO()
                data = None
                recv = self._sock.recv
                while data != '\n':
                    data = recv(1)
                    if not data:
                        break

                    buffers.append(data)
                return ''.join(buffers)

            buf.seek(0, 2)
            self._rbuf = StringIO()
            while True:
                data = self._sock.recv(self._rbufsize)
                if not data:
                    break

                nl = data.find('\n')
                if nl >= 0:
                    nl += 1
                    buf.write(buffer(data, 0, nl))
                    self._rbuf.write(buffer(data, nl))
                    del data
                    break

                buf.write(data)
            return buf.getvalue()
        else:
            buf.seek(0, 2)
            buf_len = buf.tell()
            if buf_len >= size:
                buf.seek(0)
                rv = buf.read(size)
                self._rbuf = StringIO()
                self._rbuf.write(buf.read())
                return rv

            self._rbuf = StringIO()
            while True:
                data = self._sock.recv(self._rbufsize)
                if not data:
                    break

                left = size - buf_len
                nl = data.find('\n', 0, left)
                if nl >= 0:
                    nl += 1
                    self._rbuf.write(buffer(data, nl))
                    if buf_len:
                        buf.write(buffer(data, 0, nl))
                        break
                    else:
                        return data[:nl]

                n = len(data)
                if n == size and not buf_len:
                    return data

                if n >= left:
                    buf.write(buffer(data, 0, left))
                    self._rbuf.write(buffer(data, left))
                    break

                buf.write(data)
                buf_len += n
            return buf.getvalue()


    def readlines(self, sizehint = 0):
        total = 0
        list = []
        while True:
            line = self.readline()
            if not line:
                break

            list.append(line)
            total += len(line)
            if sizehint and total >= sizehint:
                break
                continue
        return list


    def __iter__(self):
        return self


    def next(self):
        line = self.readline()
        if not line:
            raise StopIteration

        return line