获取telnet以连接到python套接字服务器时出现问题

Question

所以我开始从事一种物联网项目，我遇到的第一个问题是在设置基本服务器时遇到问题。使用本指南，要进行一些初始测试，以下是正在使用的代码：

'''

   Simple socket server using threads
'''
import socket
import sys
HOST = ''   # Symbolic name, meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'
#Bind socket to local host and port
try:
    s.bind((HOST, PORT))
except socket.error as msg:
    print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
    sys.exit()
print 'Socket bind complete'
#Start listening on socket
s.listen(10)
print 'Socket now listening'
#now keep talking with the client
while 1:
    #wait to accept a connection - blocking call
    conn, addr = s.accept()
    print 'Connected with ' + addr[0] + ':' + str(addr[1])
s.close()

我可以设置服务器，它会在套接字上侦听，但当我尝试使用telnet连接时，它会超时。既然我在大学里上网，这会是事情没有进展的原因吗？我记得不久前在C中做过这样的事情，当时它似乎起作用。。。

Answer 1

代码可以工作，但不会从客户端发送/接收。以下适度的更改使服务器向任何幸运的客户端发送beer tasty。

来源

'''
Simple socket server using threads
'''
import socket
import sys
HOST = ''   # Symbolic name, meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'
#Bind socket to local host and port
try:
    s.bind((HOST, PORT))
except socket.error as msg:
    print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
    sys.exit()
print 'Socket bind complete'
#Start listening on socket
s.listen(10)
print 'Socket now listening'
#now keep talking with the client
while 1:
    #wait to accept a connection - blocking call
    conn, addr = s.accept()
    print 'Connected with ' + addr[0] + ':' + str(addr[1])
    conn.send('beer tastyn')   # <==
    conn.close()
s.close()

在Linux中使用Netcat进行测试。（Telnet也应该工作）

试验

$ echo beer | nc -q1 localhost 8888
Connected with 127.0.0.1:37484
beer tasty