服务器代码开始监听。当我在客户端做F5并等待时，代码运行得很好。如果我再次尝试F5，在上一次尝试连接的过程中，客户端程序无法建立连接（s == None），我需要解决这个问题，特别是因为无论何时我再次运行客户端，它都会停留显示相同的问题以建立连接。在其他工作中，我需要重新启动服务器程序。 在其他调试中，我知道它的工作方式不正常，IDLE打印＆＃34; q＆＃34; s 20次然后
无法打开套接字
无法读取结果。
我接受任何有关我编码的建设性批评。编程对我来说只是一个爱好。这是我的两个代码：
import socket
import sys
import multiprocessing as mp
import time
import psycopg2 as psy
print("server is on!")
HOST = None
PORT = 50007
process = []
def checkin_room(room, passw, user, ip, port):
print("main:checkin_room")
conn = psy.connect("host=localhost dbname=pychat user=root password=codigo64")
cr = conn.cursor()
cr.execute("select * from rooms where name = '%s';")
row = cr.fetchone()
print("main: here")
if row == None:
cr.execute("insert into rooms (name,hashpw) values ('%s','%s');"%(room,passw))
cr.execute("select id from rooms where name = '%s';"%(room))
rid = cr.fetchone()[0]
cr.execute("insert into users (rid,name,ip,port) values (%d,'%s','%s',%d);"%(rid,user,ip,port))
print("new room")
return 1 # room created
else:
cr.execute("select * from rooms where name = '%s' and hashpw = '%s';"%(room,passw))
row = cr.fetchone()
if row == None:
print("wrong password for room")
return 0 # wrong password
else:
cr.execute("select ip, port from users where rid = %d and ip != '%s';"%(row[0],ip))
row = cr.fetchall()
if row == None:
print("no users in room")
return []
print("other users in room")
return row # correct password: return ip and ports of users from room
def check_socket():
print("Socket's being checked.")
while True:
s = None
for res in socket.getaddrinfo(HOST, PORT, socket.AF_UNSPEC,
socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
af, socktype, proto, canonname, sa = res
try:
s = socket.socket(af, socktype, proto)
except OSError as msg:
s = None
continue
try:
s.bind(sa)
s.listen(1)
except OSError as msg:
s.close()
s = None
continue
break
## if s is None:
## print('could not open socket')
## sys.exit(1)
if s != None:
conn, addr = s.accept()
try:
ip, port = addr
except:
print("problem: ",addr)
s.close()
s = None
continue
with conn:
print('Connected by', addr)
while True:
data = conn.recv(1024)
if not data:
break
cmd = eval(data.decode("utf-8"))
if cmd[0] == "checkin":
ret = checkin_room(cmd[1],cmd[2],cmd[3],ip,port)
conn.sendall(str(ret).encode("utf-8"))
s.close()
process.append(mp.Process(target = check_socket))
process[-1].start()
print("process started...")
time.sleep(1)
print("Command line ready for use.")
while True:
cmd = input()
if cmd == "end":
for p in process:
p.terminate()
break
print("Program's over.")
import socket, sys
HOST = "123.123.123.123" # fake host
PORT = 50007
ROOM = "ufrj"
PASSW = "fundao"
USER = "coresh"
friends = []
def send_server(host, port, cmd):
s = None
print("client: here1")
for i in range(20):
for res in socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
af, socktype, proto, canonname, sa = res
try:
s = socket.socket(af, socktype, proto)
except socket.error as msg:
s = None
continue
try:
s.connect(sa)
except socket.error as msg:
s.close()
s = None
continue
break
if s == None:
print("qq")
else:
break
if s is None:
print ('could not open socket')
return
print("client: here2")
s.sendall(bytearray(str(cmd).encode("utf-8")))
print("here3")
data = s.recv(1024)
print("here4")
s.close()
print("closed")
return eval(data.decode("utf-8"))
def checkin_room(room, passw, user):
cmd = ["checkin", room, passw, user]
ret = send_server(HOST, PORT, cmd)
if ret == 1:
print("Room's been created.")
elif ret == 0:
print("Wrong password.")
elif type(ret) == list:
if ret == []:
print("Only you in the room.")
else:
friends += ret
else:
print("Can't read result.")
checkin_room(ROOM, PASSW, USER)
答案 0 :(得分：0)
再次按F5时，您正在执行的操作是在不先关闭套接字的情况下切断程序。这导致它挂起，您不能再次使用该套接字。重新启动程序之前，使客户端进入s.close()。这将完全关闭插槽，并阻止插槽挂起。
关于编码方式，请尝试在每行代码之间插入空白行。这将帮助您阅读和调试代码。