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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.
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r �winz The operation was interrupted.i' z A bad file handle was passed.i' zPermission denied.i ' z!A fault occurred on the network??i ' z#An invalid operation was attempted.i&' z The socket operation would blocki3' z,A blocking operation is already in progress.i4' z The network address is in use.i@' z The connection has been reset.iF' z The network has been shut down.iJ' zThe operation timed out.iL' zConnection refused.iM' zThe name is too long.iO' zThe host is down.iP' zThe host is unreachable.iQ' �errorTabc
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r� Yq� Xn | d 7} | S) zVWrap __repr__() to reveal the real class name and socket
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Duplicate the socket. Return a new socket object connected to the same
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socket.dupc C s� | j � \ } } | j t � j d d � @} t | j | | j d | �} t � d k rx | j � rx | j d � n | | f S)z�accept() -> (socket object, address info)
Wait for an incoming connection. Return a new socket
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makefile(...) -> an I/O stream connected to the socket
The arguments are as for io.open() after the filename,
except the only mode characters supported are 'r', 'w' and 'b'.
The semantics are similar too. (XXX refactor to share code?)
r= �w�bz&invalid mode %r (only r, w, b allowed)r( � Nr z!unbuffered streams must be binary���) �setr �SocketIOr �io�DEFAULT_BUFFER_SIZE�BufferedRWPair�BufferedReader�BufferedWriter�
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Close the socket object without closing the underlying file descriptor.
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socket.detachc s t t � j t � S)z@Read-only access to the address family for this socket.
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)r )r+ r r r! s z socket.type�ntc C s t j | j � � S)N)�osZget_handle_inheritabler# )r r r r �get_inheritable s zsocket.get_inheritablec C s t j | j � | � d S)N)rX Zset_handle_inheritabler# )r � inheritabler r r �set_inheritable s zsocket.set_inheritablec C s t j | j � � S)N)rX rY r# )r r r r rY s c C s t j | j � | � d S)N)rX r[ r# )r rZ r r r r[ s z&Get the inheritable flag of the socketz&Set the inheritable flag of the socket) r- r, � __qualname__�__doc__� __slots__�AF_INET� SOCK_STREAMr r$ r' r2 r4 r5 r< rR rS r r rT r% rV �propertyr r! rX �namerY r[ r r )r+ r r s s0 )
r c C s t | � } t | | | | � S)z� 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().
)r5 r )r8 r r! r" Znfdr r r r % s Zsharec C s t d d d | � S)z� fromshare(info) -> socket object
Create a socket object from the bytes object returned by
socket.share(pid).
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r0 t } Yq4 Xn t j | | | � \ } } t | | | | j � � } t | | | | j � � } | | f S)aa 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.
N)ZAF_UNIX� NameErrorr_ r re r rV )r r! r" �arB r r r re : s
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k r t d | � � n t j j | � | | _ d | k rQ | d 7} n | | _ d | k | _ d | k | _ d | _ d S) Nr= rA �rw�rb�wb�rwbzinvalid mode: %rrB F)r= rA rh zrbzwbrk ) r rG � RawIOBaser �_sock�_mode�_reading�_writing�_timeout_occurred)r r9 rM r r r r ` s
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k r� d S� WYd d } ~ Xq/ Xq/ Wd S)a3 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.
z!cannot read from timed out objectTr N) � _checkClosed�_checkReadablerq �OSErrorrm Z recv_into�timeout�InterruptedErrorr/ r& �_blocking_errnos)r rB �er r r �readintol s
zSocketIO.readintoc C sn | j � | j � y | j j | � SWn? t k
ri } z | j d t k rT d S� WYd d } ~ Xn Xd S)a 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.
r N)rr �_checkWritablerm �sendr/ r& rw )r rB rx r r r �write� s
zSocketIO.writec C s | j r t d � � n | j S)z2True if the SocketIO is open for reading.
z I/O operation on closed socket.)r0 r ro )r r r r �readable� s zSocketIO.readablec C s | j r t d � � n | j S)z2True if the SocketIO is open for writing.
z I/O operation on closed socket.)r0 r rp )r r r r �writable� s zSocketIO.writablec s% | j r t d � � n t � j � S)z2True if the SocketIO is open for seeking.
z I/O operation on closed socket.)r0 r rU �seekable)r )r+ r r r � s zSocketIO.seekablec C s | j � | j j � S)z=Return the file descriptor of the underlying socket.
)rr rm r# )r r r r r# � s
zSocketIO.filenoc C s | j s | j � Sd Sd S)NrC rD )r0 r# )r r r r rb � s
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SocketIO.modec C s7 | j r
d St j j | � | j j � d | _ d S)z�Close the SocketIO object. This doesn't close the underlying
socket, except if all references to it have disappeared.
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zSocketIO.close)r- r, r\ r] r ry r| r} r~ r r# ra rb rM r% r r )r+ r rF O s rF r( c C s� | j � } | s | d k r+ t � } n y t | � \ } } } Wn t k
rX Yn8 X| j d | � x$ | D] } d | k rp Pqp qp W| } | S)a 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.
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c C s | \ } } d } x� t | | d t � D]� } | \ } } } }
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Xq( Xq( W| d k r| � n t d � � d S)ad 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.
An host of '' or port 0 tells the OS to use the default.
Nr z!getaddrinfo returns an empty list) � getaddrinfor` r �_GLOBAL_DEFAULT_TIMEOUTr6 ZbindZconnectr/ r% )Zaddressru Zsource_address�host�port�err�res�af�socktyper" � canonname�sar9 �_r r r r � s(
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| f � q% W| S)a� 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.
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