我写了一个网络应用程序。服务器能够在给定的子网上查找客户端。如果客户端从服务器接收验证消息，它将响应服务器。一切都很好，但服务器，它不能从客户接收。
客户：
def ListenServer():
# Listen init signal from Server to send data
HOST = '' # Symbolic name meaning all available interfaces
PORT = 50007 # Arbitrary non-privileged port
# UDP Socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((HOST, PORT))
data, addr = s.recvfrom(1024)
if data == 'Authen':
SocketConnect(addr[0])
def SocketConnect(HOST):
# Connect to Server to send data
print HOST
PORT = 50008 # The same port as used by the server
# Create Socket
print "Create Socket"
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error, e:
print "Error creating socket: %s" %e
sys.exit(1)
# Connect
print "Connect"
try:
s.connect((HOST, PORT))
except socket.error, e:
print "Connection error: %s" %e
sys.exit(1)
# Send Data
print "Send Data"
try:
s.sendall('Hello, world')
except socket.error, e:
print "Error sending data: %s" % e
sys.exit(1)
# Close Socket
s.close()
print "Close Socket"
ListenServer()
服务器：
from netaddr import IPAddress
import socket
import sys
import ipaddress
import time
def FindAgent():
PORT = 50007 # Port use to find Agent
#Find broadcast address
"""IPAddress("255.255.255.0").netmask_bits() #Convert Subnet Mask to Prefix Length, Result is 24"""
try :
HOST = str(ipaddress.ip_network(u'192.168.10.0/24')[-1])
except ValueError as e :
"""e = sys.exc_info()[0] # Find Exception you need"""
print e
# UDP client
MESSAGE = "Authen"
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
for x in range(0,2):
sock.sendto(MESSAGE, (HOST, PORT))
def ListenClient():
# Listen Client sent data
HOST = socket.gethostbyname(socket.gethostname())
PORT = 50008
# TCP socket
# Create Socket
print "Create Socket"
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error, e:
print "Error creating socket: %s" %e
sys.exit(1)
# Bind
print "Bind"
try:
s.bind((HOST, PORT))
except socket.error, e:
print "Error bind: %s" %e
sys.exit(1)
# Listen
print "Listen"
try:
s.listen(10)
except socket.error, e:
print "Error listen: %s" %e
sys.exit(1)
# Accept data from client
print "Accept data from client"
try:
conn, addr = s.accept()
data = s.recv(1024)
except socket.error, e:
print "Error listen: %s" %e
sys.exit(1)
print data
s.close()
FindAgent()
ListenClient()
服务器出错：
Create Socket
Bind
Listen
Accept data from client
Error listen: [Errno 10057] A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied
[Finished in 0.8s with exit code 1]
[shell_cmd: python -u "C:\Users\Win7_Lab\Desktop\Server.py"]
[dir: C:\Users\Win7_Lab\Desktop]
[path: C:\Python27\;C:\Python27\Scripts;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\]
没有服务器上的行data = s.recv（1024），它工作正常。但有了它，错误就出现了。任何人都可以告诉我为什么会这样吗？
崩溃来自s.recv(1024)，因为你说这是因为你的服务器上的接收（.recv()）方法需要在客户端连接上调用。
请遵循以下示例：here
服务器文件：
conn, addr = s.accept()
data = conn.recv(1024)
客户档案：
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect((HOST, PORT))
data = s.recv(1024)
如您所见，客户端从套接字（服务器）接收数据。服务器从客户端连接接收数据。
希望这很有用。
编辑添加一些示例链接。
您可以在这些教程中找到所需内容：