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usr/lib64/python2.7/socket.py��0000644��00000050207�14720445446�0011725 0��ustar�00��# Wrapper module for _socket, providing some additional facilities # implemented in Python. """\ 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() -- map 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 create_connection() -- connects to an address, with an optional timeout and optional source address. [] 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 from functools import partial from types import MethodType try: import _ssl except ImportError: # no SSL support pass else: def ssl(sock, keyfile=None, certfile=None): # we do an internal import here because the ssl # module imports the socket module import ssl as _realssl warnings.warn("socket.ssl() is deprecated. Use ssl.wrap_socket() instead.", DeprecationWarning, stacklevel=2) return _realssl.sslwrap_simple(sock, keyfile, certfile) # we need to import the same constants we used to... from _ssl import SSLError as sslerror from _ssl import \ RAND_add, \ RAND_status, \ SSL_ERROR_ZERO_RETURN, \ SSL_ERROR_WANT_READ, \ SSL_ERROR_WANT_WRITE, \ SSL_ERROR_WANT_X509_LOOKUP, \ SSL_ERROR_SYSCALL, \ SSL_ERROR_SSL, \ SSL_ERROR_WANT_CONNECT, \ SSL_ERROR_EOF, \ SSL_ERROR_INVALID_ERROR_CODE try: from _ssl import RAND_egd except ImportError: # LibreSSL does not provide RAND_egd pass import os, sys, warnings try: from cStringIO import StringIO except ImportError: from StringIO import StringIO try: import errno except ImportError: errno = None EBADF = getattr(errno, 'EBADF', 9) EINTR = getattr(errno, 'EINTR', 4) __all__ = ["getfqdn", "create_connection"] __all__.extend(os._get_exports_list(_socket)) _realsocket = socket # WSA error codes 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??" # WSAEFAULT 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 else: aliases.insert(0, hostname) for name in aliases: if '.' in name: break else: name = hostname return name _socketmethods = ( 'bind', 'connect', 'connect_ex', 'fileno', 'listen', 'getpeername', 'getsockname', 'getsockopt', 'setsockopt', 'sendall', 'setblocking', 'settimeout', 'gettimeout', 'shutdown') if os.name == "nt": _socketmethods = _socketmethods + ('ioctl',) if sys.platform == "riscos": _socketmethods = _socketmethods + ('sleeptaskw',) # All the method names that must be delegated to either the real socket # object or the _closedsocket object. _delegate_methods = ("recv", "recvfrom", "recv_into", "recvfrom_into", "send", "sendto") class _closedsocket(object): __slots__ = [] def _dummy(args): raise error(EBADF, 'Bad file descriptor') # All _delegate_methods must also be initialized here. send = recv = recv_into = sendto = recvfrom = recvfrom_into = _dummy __getattr__ = _dummy # Wrapper around platform socket objects. This implements # a platform-independent dup() functionality. The # implementation currently relies on reference counting # to close the underlying socket object. 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, _closedsocket=_closedsocket, _delegate_methods=_delegate_methods, setattr=setattr): # This function should not reference any globals. See issue #808164. 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") def meth(name,self,args): return getattr(self._sock,name)(args) for _m in _socketmethods: p = partial(meth,_m) p.__name__ = _m p.__doc__ = getattr(_realsocket,_m).__doc__ m = MethodType(p,None,_socketobject) setattr(_socketobject,_m,m) socket = SocketType = _socketobject class _fileobject(object): """Faux file object attached to a socket object.""" default_bufsize = 8192 name = "<socket>" __slots__ = ["mode", "bufsize", "softspace", # "closed" is a property, see below "_sock", "_rbufsize", "_wbufsize", "_rbuf", "_wbuf", "_wbuf_len", "_close"] def __init__(self, sock, mode='rb', bufsize=-1, close=False): self._sock = sock self.mode = mode # Not actually used in this version if bufsize < 0: bufsize = self.default_bufsize self.bufsize = bufsize self.softspace = False # _rbufsize is the suggested recv buffer size. It is strictly* # obeyed within readline() for recv calls. If it is larger than # default_bufsize it will be used for recv calls within read(). if bufsize == 0: self._rbufsize = 1 elif bufsize == 1: self._rbufsize = self.default_bufsize else: self._rbufsize = bufsize self._wbufsize = bufsize # We use StringIO for the read buffer to avoid holding a list # of variously sized string objects which have been known to # fragment the heap due to how they are malloc()ed and often # realloc()ed down much smaller than their original allocation. self._rbuf = StringIO() self._wbuf = [] # A list of strings self._wbuf_len = 0 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: # close() may fail if __init__ didn't complete pass def flush(self): if self._wbuf: data = "".join(self._wbuf) self._wbuf = [] self._wbuf_len = 0 buffer_size = max(self._rbufsize, self.default_bufsize) data_size = len(data) write_offset = 0 view = memoryview(data) try: while write_offset < data_size: self._sock.sendall(view[write_offset:write_offset+buffer_size]) write_offset += buffer_size finally: if write_offset < data_size: remainder = data[write_offset:] del view, data # explicit free self._wbuf.append(remainder) self._wbuf_len = len(remainder) def fileno(self): return self._sock.fileno() def write(self, data): data = str(data) # XXX Should really reject non-string non-buffers if not data: return self._wbuf.append(data) self._wbuf_len += len(data) if (self._wbufsize == 0 or (self._wbufsize == 1 and '\n' in data) or (self._wbufsize > 1 and self._wbuf_len >= self._wbufsize)): self.flush() def writelines(self, list): # XXX We could do better here for very long lists # XXX Should really reject non-string non-buffers lines = filter(None, map(str, list)) self._wbuf_len += sum(map(len, lines)) self._wbuf.extend(lines) if (self._wbufsize <= 1 or self._wbuf_len >= self._wbufsize): self.flush() def read(self, size=-1): # Use max, disallow tiny reads in a loop as they are very inefficient. # We never leave read() with any leftover data from a new recv() call # in our internal buffer. rbufsize = max(self._rbufsize, self.default_bufsize) # Our use of StringIO rather than lists of string objects returned by # recv() minimizes memory usage and fragmentation that occurs when # rbufsize is large compared to the typical return value of recv(). buf = self._rbuf buf.seek(0, 2) # seek end if size < 0: # Read until EOF self._rbuf = StringIO() # reset _rbuf. we consume it via buf. while True: try: data = self._sock.recv(rbufsize) except error, e: if e.args[0] == EINTR: continue raise if not data: break buf.write(data) return buf.getvalue() else: # Read until size bytes or EOF seen, whichever comes first buf_len = buf.tell() if buf_len >= size: # Already have size bytes in our buffer? Extract and return. buf.seek(0) rv = buf.read(size) self._rbuf = StringIO() self._rbuf.write(buf.read()) return rv self._rbuf = StringIO() # reset _rbuf. we consume it via buf. while True: left = size - buf_len # recv() will malloc the amount of memory given as its # parameter even though it often returns much less data # than that. The returned data string is short lived # as we copy it into a StringIO and free it. This avoids # fragmentation issues on many platforms. try: data = self._sock.recv(left) except error, e: if e.args[0] == EINTR: continue raise if not data: break n = len(data) if n == size and not buf_len: # Shortcut. Avoid buffer data copies when: # - We have no data in our buffer. # AND # - Our call to recv returned exactly the # number of bytes we were asked to read. return data if n == left: buf.write(data) del data # explicit free break assert n <= left, "recv(%d) returned %d bytes" % (left, n) buf.write(data) buf_len += n del data # explicit free #assert buf_len == buf.tell() return buf.getvalue() def readline(self, size=-1): buf = self._rbuf buf.seek(0, 2) # seek end if buf.tell() > 0: # check if we already have it in our buffer 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: # Read until \n or EOF, whichever comes first if self._rbufsize <= 1: # Speed up unbuffered case buf.seek(0) buffers = [buf.read()] self._rbuf = StringIO() # reset _rbuf. we consume it via buf. data = None recv = self._sock.recv while True: try: while data != "\n": data = recv(1) if not data: break buffers.append(data) except error, e: # The try..except to catch EINTR was moved outside the # recv loop to avoid the per byte overhead. if e.args[0] == EINTR: continue raise break return "".join(buffers) buf.seek(0, 2) # seek end self._rbuf = StringIO() # reset _rbuf. we consume it via buf. while True: try: data = self._sock.recv(self._rbufsize) except error, e: if e.args[0] == EINTR: continue raise if not data: break nl = data.find('\n') if nl >= 0: nl += 1 buf.write(data[:nl]) self._rbuf.write(data[nl:]) del data break buf.write(data) return buf.getvalue() else: # Read until size bytes or \n or EOF seen, whichever comes first buf.seek(0, 2) # seek end 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() # reset _rbuf. we consume it via buf. while True: try: data = self._sock.recv(self._rbufsize) except error, e: if e.args[0] == EINTR: continue raise if not data: break left = size - buf_len # did we just receive a newline? nl = data.find('\n', 0, left) if nl >= 0: nl += 1 # save the excess data to _rbuf self._rbuf.write(data[nl:]) if buf_len: buf.write(data[:nl]) break else: # Shortcut. Avoid data copy through buf when returning # a substring of our first recv(). return data[:nl] n = len(data) if n == size and not buf_len: # Shortcut. Avoid data copy through buf when # returning exactly all of our first recv(). return data if n >= left: buf.write(data[:left]) self._rbuf.write(data[left:]) break buf.write(data) buf_len += n #assert buf_len == buf.tell() 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 return list # Iterator protocols def __iter__(self): return self def next(self): line = self.readline() if not line: raise StopIteration return line _GLOBAL_DEFAULT_TIMEOUT = object() def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None): """Connect to address and return the socket object. Convenience function. Connect to address (a 2-tuple ``(host, port)``) and return the socket object. Passing the optional timeout parameter will set the timeout on the socket instance before attempting to connect. If no timeout is supplied, the global default timeout setting returned by :func:`getdefaulttimeout` is used. If source_address is set it must be a tuple of (host, port) for the socket to bind as a source address before making the connection. A host of '' or port 0 tells the OS to use the default. """ host, port = address err = None for res in getaddrinfo(host, port, 0, SOCK_STREAM): af, socktype, proto, canonname, sa = res sock = None try: sock = socket(af, socktype, proto) if timeout is not _GLOBAL_DEFAULT_TIMEOUT: sock.settimeout(timeout) if source_address: sock.bind(source_address) sock.connect(sa) return sock except error as _: err = _ if sock is not None: sock.close() if err is not None: raise err else: raise error("getaddrinfo returns an empty list") ��usr/lib64/python3.6/socket.py��0000644��00000065463�14720451327�0011732 0��ustar�00��# Wrapper module for _socket, providing some additional facilities # implemented in Python. """\ 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 [] fromshare() -- create a socket object from data received from socket.share() [] 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() -- map 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) socket.getdefaulttimeout() -- get the default timeout value socket.setdefaulttimeout() -- set the default timeout value create_connection() -- connects to an address, with an optional timeout and optional source address. [] 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 IntEnum constants: AF_INET, AF_UNIX -- socket domains (first argument to socket() call) SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument) Integer constants: Many other constants may be defined; these may be used in calls to the setsockopt() and getsockopt() methods. """ import _socket from _socket import * import os, sys, io, selectors from enum import IntEnum, IntFlag try: import errno except ImportError: errno = None EBADF = getattr(errno, 'EBADF', 9) EAGAIN = getattr(errno, 'EAGAIN', 11) EWOULDBLOCK = getattr(errno, 'EWOULDBLOCK', 11) __all__ = ["fromfd", "getfqdn", "create_connection", "AddressFamily", "SocketKind"] __all__.extend(os._get_exports_list(_socket)) # Set up the socket.AF_* socket.SOCK_* constants as members of IntEnums for # nicer string representations. # Note that _socket only knows about the integer values. The public interface # in this module understands the enums and translates them back from integers # where needed (e.g. .family property of a socket object). IntEnum._convert( 'AddressFamily', __name__, lambda C: C.isupper() and C.startswith('AF_')) IntEnum._convert( 'SocketKind', __name__, lambda C: C.isupper() and C.startswith('SOCK_')) IntFlag._convert( 'MsgFlag', __name__, lambda C: C.isupper() and C.startswith('MSG_')) IntFlag._convert( 'AddressInfo', __name__, lambda C: C.isupper() and C.startswith('AI_')) _LOCALHOST = '127.0.0.1' _LOCALHOST_V6 = '::1' def _intenum_converter(value, enum_klass): """Convert a numeric family value to an IntEnum member. If it's not a known member, return the numeric value itself. """ try: return enum_klass(value) except ValueError: return value _realsocket = socket # WSA error codes 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??" # WSAEFAULT 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") class _GiveupOnSendfile(Exception): pass class socket(_socket.socket): """A subclass of _socket.socket adding the makefile() method.""" __slots__ = ["__weakref__", "_io_refs", "_closed"] def __init__(self, family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None): # For user code address family and type values are IntEnum members, but # for the underlying _socket.socket they're just integers. The # constructor of _socket.socket converts the given argument to an # integer automatically. _socket.socket.__init__(self, family, type, proto, fileno) self._io_refs = 0 self._closed = False def __enter__(self): return self def __exit__(self, args): if not self._closed: self.close() def __repr__(self): """Wrap __repr__() to reveal the real class name and socket address(es). """ closed = getattr(self, '_closed', False) s = "<%s.%s%s fd=%i, family=%s, type=%s, proto=%i" \ % (self.__class__.__module__, self.__class__.__qualname__, " [closed]" if closed else "", self.fileno(), self.family, self.type, self.proto) if not closed: try: laddr = self.getsockname() if laddr: s += ", laddr=%s" % str(laddr) except error: pass try: raddr = self.getpeername() if raddr: s += ", raddr=%s" % str(raddr) except error: pass s += '>' return s def __getstate__(self): raise TypeError("Cannot serialize socket object") def dup(self): """dup() -> socket object Duplicate the socket. Return a new socket object connected to the same system resource. The new socket is non-inheritable. """ fd = dup(self.fileno()) sock = self.__class__(self.family, self.type, self.proto, fileno=fd) sock.settimeout(self.gettimeout()) return sock def accept(self): """accept() -> (socket object, address info) Wait for an incoming connection. Return a new socket representing the connection, and the address of the client. For IP sockets, the address info is a pair (hostaddr, port). """ fd, addr = self._accept() # If our type has the SOCK_NONBLOCK flag, we shouldn't pass it onto the # new socket. We do not currently allow passing SOCK_NONBLOCK to # accept4, so the returned socket is always blocking. type = self.type & ~globals().get("SOCK_NONBLOCK", 0) sock = socket(self.family, type, self.proto, fileno=fd) # Issue #7995: if no default timeout is set and the listening # socket had a (non-zero) timeout, force the new socket in blocking # mode to override platform-specific socket flags inheritance. if getdefaulttimeout() is None and self.gettimeout(): sock.setblocking(True) return sock, addr def makefile(self, mode="r", buffering=None, , encoding=None, errors=None, newline=None): """makefile(...) -> an I/O stream connected to the socket The arguments are as for io.open() after the filename, except the only supported mode values are 'r' (default), 'w' and 'b'. """ # XXX refactor to share code? if not set(mode) <= {"r", "w", "b"}: raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,)) writing = "w" in mode reading = "r" in mode or not writing assert reading or writing binary = "b" in mode rawmode = "" if reading: rawmode += "r" if writing: rawmode += "w" raw = SocketIO(self, rawmode) self._io_refs += 1 if buffering is None: buffering = -1 if buffering < 0: buffering = io.DEFAULT_BUFFER_SIZE if buffering == 0: if not binary: raise ValueError("unbuffered streams must be binary") return raw if reading and writing: buffer = io.BufferedRWPair(raw, raw, buffering) elif reading: buffer = io.BufferedReader(raw, buffering) else: assert writing buffer = io.BufferedWriter(raw, buffering) if binary: return buffer text = io.TextIOWrapper(buffer, encoding, errors, newline) text.mode = mode return text if hasattr(os, 'sendfile'): def _sendfile_use_sendfile(self, file, offset=0, count=None): self._check_sendfile_params(file, offset, count) sockno = self.fileno() try: fileno = file.fileno() except (AttributeError, io.UnsupportedOperation) as err: raise _GiveupOnSendfile(err) # not a regular file try: fsize = os.fstat(fileno).st_size except OSError as err: raise _GiveupOnSendfile(err) # not a regular file if not fsize: return 0 # empty file blocksize = fsize if not count else count timeout = self.gettimeout() if timeout == 0: raise ValueError("non-blocking sockets are not supported") # poll/select have the advantage of not requiring any # extra file descriptor, contrarily to epoll/kqueue # (also, they require a single syscall). if hasattr(selectors, 'PollSelector'): selector = selectors.PollSelector() else: selector = selectors.SelectSelector() selector.register(sockno, selectors.EVENT_WRITE) total_sent = 0 # localize variable access to minimize overhead selector_select = selector.select os_sendfile = os.sendfile try: while True: if timeout and not selector_select(timeout): raise _socket.timeout('timed out') if count: blocksize = count - total_sent if blocksize <= 0: break try: sent = os_sendfile(sockno, fileno, offset, blocksize) except BlockingIOError: if not timeout: # Block until the socket is ready to send some # data; avoids hogging CPU resources. selector_select() continue except OSError as err: if total_sent == 0: # We can get here for different reasons, the main # one being 'file' is not a regular mmap(2)-like # file, in which case we'll fall back on using # plain send(). raise _GiveupOnSendfile(err) raise err from None else: if sent == 0: break # EOF offset += sent total_sent += sent return total_sent finally: if total_sent > 0 and hasattr(file, 'seek'): file.seek(offset) else: def _sendfile_use_sendfile(self, file, offset=0, count=None): raise _GiveupOnSendfile( "os.sendfile() not available on this platform") def _sendfile_use_send(self, file, offset=0, count=None): self._check_sendfile_params(file, offset, count) if self.gettimeout() == 0: raise ValueError("non-blocking sockets are not supported") if offset: file.seek(offset) blocksize = min(count, 8192) if count else 8192 total_sent = 0 # localize variable access to minimize overhead file_read = file.read sock_send = self.send try: while True: if count: blocksize = min(count - total_sent, blocksize) if blocksize <= 0: break data = memoryview(file_read(blocksize)) if not data: break # EOF while True: try: sent = sock_send(data) except BlockingIOError: continue else: total_sent += sent if sent < len(data): data = data[sent:] else: break return total_sent finally: if total_sent > 0 and hasattr(file, 'seek'): file.seek(offset + total_sent) def _check_sendfile_params(self, file, offset, count): if 'b' not in getattr(file, 'mode', 'b'): raise ValueError("file should be opened in binary mode") if not self.type & SOCK_STREAM: raise ValueError("only SOCK_STREAM type sockets are supported") if count is not None: if not isinstance(count, int): raise TypeError( "count must be a positive integer (got {!r})".format(count)) if count <= 0: raise ValueError( "count must be a positive integer (got {!r})".format(count)) def sendfile(self, file, offset=0, count=None): """sendfile(file[, offset[, count]]) -> sent Send a file until EOF is reached by using high-performance os.sendfile() and return the total number of bytes which were sent. file must be a regular file object opened in binary mode. If os.sendfile() is not available (e.g. Windows) or file is not a regular file socket.send() will be used instead. offset tells from where to start reading the file. If specified, count is the total number of bytes to transmit as opposed to sending the file until EOF is reached. File position is updated on return or also in case of error in which case file.tell() can be used to figure out the number of bytes which were sent. The socket must be of SOCK_STREAM type. Non-blocking sockets are not supported. """ try: return self._sendfile_use_sendfile(file, offset, count) except _GiveupOnSendfile: return self._sendfile_use_send(file, offset, count) def _decref_socketios(self): if self._io_refs > 0: self._io_refs -= 1 if self._closed: self.close() def _real_close(self, _ss=_socket.socket): # This function should not reference any globals. See issue #808164. _ss.close(self) def close(self): # This function should not reference any globals. See issue #808164. self._closed = True if self._io_refs <= 0: self._real_close() def detach(self): """detach() -> file descriptor Close the socket object without closing the underlying file descriptor. The object cannot be used after this call, but the file descriptor can be reused for other purposes. The file descriptor is returned. """ self._closed = True return super().detach() @property def family(self): """Read-only access to the address family for this socket. """ return _intenum_converter(super().family, AddressFamily) @property def type(self): """Read-only access to the socket type. """ return _intenum_converter(super().type, SocketKind) if os.name == 'nt': def get_inheritable(self): return os.get_handle_inheritable(self.fileno()) def set_inheritable(self, inheritable): os.set_handle_inheritable(self.fileno(), inheritable) else: def get_inheritable(self): return os.get_inheritable(self.fileno()) def set_inheritable(self, inheritable): os.set_inheritable(self.fileno(), inheritable) get_inheritable.__doc__ = "Get the inheritable flag of the socket" set_inheritable.__doc__ = "Set the inheritable flag of the socket" def fromfd(fd, family, type, proto=0): """ fromfd(fd, family, type[, proto]) -> socket object Create a socket object from a duplicate of the given file descriptor. The remaining arguments are the same as for socket(). """ nfd = dup(fd) return socket(family, type, proto, nfd) if hasattr(_socket.socket, "share"): def fromshare(info): """ fromshare(info) -> socket object Create a socket object from the bytes object returned by socket.share(pid). """ return socket(0, 0, 0, info) __all__.append("fromshare") if hasattr(_socket, "socketpair"): def socketpair(family=None, type=SOCK_STREAM, proto=0): """socketpair([family[, type[, proto]]]) -> (socket object, socket object) Create a pair of socket objects from the sockets returned by the platform socketpair() function. The arguments are the same as for socket() except the default family is AF_UNIX if defined on the platform; otherwise, the default is AF_INET. """ if family is None: try: family = AF_UNIX except NameError: family = AF_INET a, b = _socket.socketpair(family, type, proto) a = socket(family, type, proto, a.detach()) b = socket(family, type, proto, b.detach()) return a, b else: # Origin: https://gist.github.com/4325783, by Geert Jansen. Public domain. def socketpair(family=AF_INET, type=SOCK_STREAM, proto=0): if family == AF_INET: host = _LOCALHOST elif family == AF_INET6: host = _LOCALHOST_V6 else: raise ValueError("Only AF_INET and AF_INET6 socket address families " "are supported") if type != SOCK_STREAM: raise ValueError("Only SOCK_STREAM socket type is supported") if proto != 0: raise ValueError("Only protocol zero is supported") # We create a connected TCP socket. Note the trick with # setblocking(False) that prevents us from having to create a thread. lsock = socket(family, type, proto) try: lsock.bind((host, 0)) lsock.listen() # On IPv6, ignore flow_info and scope_id addr, port = lsock.getsockname()[:2] csock = socket(family, type, proto) try: csock.setblocking(False) try: csock.connect((addr, port)) except (BlockingIOError, InterruptedError): pass csock.setblocking(True) ssock, _ = lsock.accept() except: csock.close() raise finally: lsock.close() return (ssock, csock) __all__.append("socketpair") socketpair.__doc__ = """socketpair([family[, type[, proto]]]) -> (socket object, socket object) Create a pair of socket objects from the sockets returned by the platform socketpair() function. The arguments are the same as for socket() except the default family is AF_UNIX if defined on the platform; otherwise, the default is AF_INET. """ _blocking_errnos = { EAGAIN, EWOULDBLOCK } class SocketIO(io.RawIOBase): """Raw I/O implementation for stream sockets. This class supports the makefile() method on sockets. It provides the raw I/O interface on top of a socket object. """ # One might wonder why not let FileIO do the job instead. There are two # main reasons why FileIO is not adapted: # - it wouldn't work under Windows (where you can't used read() and # write() on a socket handle) # - it wouldn't work with socket timeouts (FileIO would ignore the # timeout and consider the socket non-blocking) # XXX More docs def __init__(self, sock, mode): if mode not in ("r", "w", "rw", "rb", "wb", "rwb"): raise ValueError("invalid mode: %r" % mode) io.RawIOBase.__init__(self) self._sock = sock if "b" not in mode: mode += "b" self._mode = mode self._reading = "r" in mode self._writing = "w" in mode self._timeout_occurred = False def readinto(self, b): """Read up to len(b) bytes into the writable buffer b and return the number of bytes read. If the socket is non-blocking and no bytes are available, None is returned. If b is non-empty, a 0 return value indicates that the connection was shutdown at the other end. """ self._checkClosed() self._checkReadable() if self._timeout_occurred: raise OSError("cannot read from timed out object") while True: try: return self._sock.recv_into(b) except timeout: self._timeout_occurred = True raise except error as e: if e.args[0] in _blocking_errnos: return None raise def write(self, b): """Write the given bytes or bytearray object b to the socket and return the number of bytes written. This can be less than len(b) if not all data could be written. If the socket is non-blocking and no bytes could be written None is returned. """ self._checkClosed() self._checkWritable() try: return self._sock.send(b) except error as e: # XXX what about EINTR? if e.args[0] in _blocking_errnos: return None raise def readable(self): """True if the SocketIO is open for reading. """ if self.closed: raise ValueError("I/O operation on closed socket.") return self._reading def writable(self): """True if the SocketIO is open for writing. """ if self.closed: raise ValueError("I/O operation on closed socket.") return self._writing def seekable(self): """True if the SocketIO is open for seeking. """ if self.closed: raise ValueError("I/O operation on closed socket.") return super().seekable() def fileno(self): """Return the file descriptor of the underlying socket. """ self._checkClosed() return self._sock.fileno() @property def name(self): if not self.closed: return self.fileno() else: return -1 @property def mode(self): return self._mode def close(self): """Close the SocketIO object. This doesn't close the underlying socket, except if all references to it have disappeared. """ if self.closed: return io.RawIOBase.close(self) self._sock._decref_socketios() self._sock = None 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 else: aliases.insert(0, hostname) for name in aliases: if '.' in name: break else: name = hostname return name _GLOBAL_DEFAULT_TIMEOUT = object() def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None): """Connect to address and return the socket object. Convenience function. Connect to address (a 2-tuple ``(host, port)``) and return the socket object. Passing the optional timeout parameter will set the timeout on the socket instance before attempting to connect. If no timeout is supplied, the global default timeout setting returned by :func:`getdefaulttimeout` is used. If source_address is set it must be a tuple of (host, port) for the socket to bind as a source address before making the connection. A host of '' or port 0 tells the OS to use the default. """ host, port = address err = None for res in getaddrinfo(host, port, 0, SOCK_STREAM): af, socktype, proto, canonname, sa = res sock = None try: sock = socket(af, socktype, proto) if timeout is not _GLOBAL_DEFAULT_TIMEOUT: sock.settimeout(timeout) if source_address: sock.bind(source_address) sock.connect(sa) # Break explicitly a reference cycle err = None return sock except error as _: err = _ if sock is not None: sock.close() if err is not None: raise err else: raise error("getaddrinfo returns an empty list") def getaddrinfo(host, port, family=0, type=0, proto=0, flags=0): """Resolve host and port into list of address info entries. Translate the host/port argument into a sequence of 5-tuples that contain all the necessary arguments for creating a socket connected to that service. host is a domain name, a string representation of an IPv4/v6 address or None. port is a string service name such as 'http', a numeric port number or None. By passing None as the value of host and port, you can pass NULL to the underlying C API. The family, type and proto arguments can be optionally specified in order to narrow the list of addresses returned. Passing zero as a value for each of these arguments selects the full range of results. """ # We override this function since we want to translate the numeric family # and socket type values to enum constants. addrlist = [] for res in _socket.getaddrinfo(host, port, family, type, proto, flags): af, socktype, proto, canonname, sa = res addrlist.append((_intenum_converter(af, AddressFamily), _intenum_converter(socktype, SocketKind), proto, canonname, sa)) return addrlist ��

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