-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathecho_client.py
More file actions
73 lines (54 loc) · 2.51 KB
/
echo_client.py
File metadata and controls
73 lines (54 loc) · 2.51 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
import socket
import sys
def client(msg, log_buffer = sys.stderr):
server_address = ('127.0.0.1', 10000)
# TODO: Replace the following line with your code which will instantiate
# a TCP socket with IPv4 Addressing, call the socket you make 'sock'
print('connecting to {0} port {1}'.format(*server_address), file=log_buffer)
# TODO: connect your socket to the server here.
client_socket=socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
client_socket.connect(server_address)
# you can use this variable to accumulate the entire message received back
# from the server
received_message = b''
# this try/finally block exists purely to allow us to close the socket
# when we are finished with it
try:
print('sending "{0}"'.format(msg), file=log_buffer)
# TODO: send your message to the server here.
client_socket.sendall(msg.encode('utf8'))
# TODO: the server should be sending you back your message as a series
# of 16-byte chunks. Accumulate the chunks you get to build the
# entire reply from the server. Make sure that you have received
# the entire message and then you can break the loop.
#
# Log each chunk you receive. Use the print statement below to
# do it. This will help in debugging problems
len_msg = sys.getsizeof(msg)
print('message byte length:', len_msg)
chunk = ''
done = False
while not done:
chunk = client_socket.recv(16)
if len(chunk ) < 16:
done = True
client_socket.close()
received_message += chunk
print('received_message:', received_message.decode('utf8'))
finally:
# TODO: after you break out of the loop receiving echoed chunks from
# the server you will want to close your client socket.
print('closing socket', file=log_buffer)
client_socket.close()
# TODO: when all is said and done, you should return the entire reply
# you received from the server as the return value of this function.
print('received_message:', received_message.decode('utf8'))
return(received_message.decode('utf8'))
if __name__ == '__main__':
if len(sys.argv) != 2:
usage = '\nusage: python echo_client.py "this is my message"\n'
print(usage, file=sys.stderr)
sys.exit(1)
msg = sys.argv[1]
print(msg)
client(msg)