Question

我正在尝试与另一个java程序和raspebrry pi连接的python应用程序。我的程序应该不断地从java和raspberry听，并能够响应。我不知道该怎么做。我正在使用几个线程，我可以向raspberry发送消息并在同一时间听java，但我不能听两个连接，这对我来说是必要的。

def startProgram(sock):
try:
    sock.setblocking(False)
    sock.settimeout(10)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.connect((JAVA_HOST, JAVA_PORT))

    data = sock.recv(1024)

    if (data == "abc\r\n"):
         sock.sendall("abc otrzymane!!!\n")
         global ROBOT_IP_ADDRESS
         ROBOT_IP_ADDRESS = sys.argv[0] + "." + sys.argv[1] + "." + sys.argv[2] + "." + sys.argv[3]
         threading.Thread(target=Steering, args=[order]).start()
         threading.Thread(target=GetDistance, args=[sock]).start()
except:
    sock.close()
finally:
    return sock

//program starts here!
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock = startProgram(sock)
sock.listen(1)
sock.setblocking(0)

while 1:
  conn, addr = sock.accept()
  data = conn.recv(1024)
  if (data == "camera\r\n"):
    isCameraOn = ~isCameraOn
    if isCameraOn == True:
        SendOrder("camera_on")
    else:
        SendOrder("camera_off")
  if(data == "order\r\n"):
    order = data

这是我从java运行这个程序时执行的代码。它的功能代码是来自raspberry的收听信息：

def GetDistance(s):
 s.bind((MY_IP_ADDRESS, FROM_ROBOT_PORT)) // EXCEPTION
 s.listen(1)
 while (True):
    conn, addr = s.accept()
    print('Connection address:', addr)
    while 1:
        data = conn.recv(BUFFER_SIZE_DISTANCE)
        if not data: break
        print("received data:", data)
        conn.send(data)  # echo
    conn.close()

一般问题是socket。我不能创建两个套接字变量并同时在不同的端口监听，我不知道为什么。例外：

File "pythonScript.py", line 32, in GetDistance
   s.bind((JAVA_HOST, FROM_ROBOT_PORT))
File "<string>", line 1, in bind
File "C:\jython2.5.0\Lib\socket.py", line 777, in bind
  assert not self.sock_impl
AssertionError

我也不知道这个例外究竟意味着什么。

Python套接字多个连接

0 个答案: