在python中使用udp多播进行文件传输

Question

如何在Python中使用UDP多播发送和接收文件，有标准的图书馆可以这样做吗？，或任何其他标准功能模块？

Answer 1

以下是关于如何使用源代码示例做到这一点的信息：

import socket
import struct
import sys
message = 'very important data'
multicast_group = ('224.3.29.71', 10000)
# Create the datagram socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Set a timeout so the socket does not block indefinitely when trying
# to receive data.
sock.settimeout(0.2)
try:
    # Send data to the multicast group
    print >>sys.stderr, 'sending "%s"' % message
    sent = sock.sendto(message, multicast_group)
    # Look for responses from all recipients
    while True:
        print >>sys.stderr, 'waiting to receive'
        try:
            data, server = sock.recvfrom(16)
        except socket.timeout:
            print >>sys.stderr, 'timed out, no more responses'
            break
        else:
            print >>sys.stderr, 'received "%s" from %s' % (data, server)
finally:
    print >>sys.stderr, 'closing socket'
    sock.close()