Hi,
I'm trying to understand how to pickle Python objects over a TCP
socket.
In the example below (based on code from Foundations of Python Network
Programming), a client creates a dictionary (lines 34-38) and uses
pickle.dump at line 42 to write the pickled object using file handle
make from a socket. The server de-pickles with pickle.load (line 24),
again using a file handle made from a socket.
When I run the program, the following output is produced:
Listening at ('127.0.0.1', 1060)
Accepted connection from ('127.0.0.1', 49938)
Traceback (most recent call last):
File "pickles.py", line 24, in
d = pickle.load( s_fh )
File "/usr/local/lib/python2.7/pickle.py", line 1378, in load
return Unpickler(file).load()
File "/usr/local/lib/python2.7/pickle.py", line 857, in load
key = read(1)
File "/usr/local/lib/python2.7/socket.py", line 380, in read
data = self._sock.recv(left)
socket.error: [Errno 107] Transport endpoint is not connected
I'm at a loss, can anyone provide any guidance?
Thanks,
Roger Alexander
1 import pickle
2 import socket, sys
3
4 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
5
6 HOST = sys.argv.pop() if len(sys.argv) == 3 else '127.0.0.1'
7 PORT = 1060
8
9 if sys.argv[1:] == ['server']:
10
11 s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
12 s.bind((HOST, PORT))
13 s.listen(1)
14
15 print 'Listening at', s.getsockname()
16
17 sc, sockname = s.accept()
18
19 print 'Accepted connection from', sockname
20
21 sc.shutdown(socket.SHUT_WR)
22 sf = s.makefile( "rb" )
23
24 d = pickle.load(sf)
25
26 sc.close()
27 s.close()
28
29 elif sys.argv[1:] == ['client']:
30
31 s.connect((HOST, PORT))
32 s.shutdown(socket.SHUT_RD)
33
34 d = dict()
35
36 d[ 'Name' ] = 'Jake Thompson.'
37 d[ 'Age' ] = 25
38 d[ 'Location' ] = 'Washington, D.C.'
39
40 sf = s.makefile( "wb" )
41
42 pickle.dump( d, sf, pickle.HIGHEST_PROTOCOL )
43
44 s.close()
45
46 else:
47 print >>sys.stderr, 'usage: streamer.py server|client [host]'
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