連接客戶端套接字和服務器套接字的問題

Question

我有一台在 IP 地址為 192.168.1.11 的台式機上運行的服務器，客戶端代碼在通過 OpenVPN 連接訪問的服務器上運行。 當我運行下面的代碼客戶端發送請求但服務器沒有收到它。

服務器.py：

context=zmq.Context()
socket=context.socket(zmq.REP)
socket.bind("tcp://*:8080")
while True:
  message=socket.recv_pyobj()
  print("%s:%s" %(message.get(1)[0],message.get(1)[1]))
  socket.send_pyobj({1:[message.get(1)[0],message.get(1)[1]]})

客戶端.py

socket=context.socket(zmq.REQ)
socket.connect("tcp://192.168.1.11:8080")
name="Test"
while True:
   message=input("Test Message")
   socket.send_pyobj(({1:[name,message]}))

非常感謝您的幫助。

Answer 1

問： “連接客戶端套接字和服務器套接字的問題”

步驟 0：證明已實現 OSI-ISO-Layer-3 可見性traceroute <targetIP>

第 1 步：實現到<targetIP>的可見路由后，修復代碼以滿足記錄的REQ/REP屬性

第 2 步：在實現了到<targetIP>和REQ/REP的可見路由之后，我們應該提高代碼的健壯性

context = zmq.Context()
socket  = context.socket( zmq.REP )
socket.bind( "tcp://*:8080" )
#---------------------------------------------- # ROBUSTNESS CONFIGs
socket.setsockopt( zmq.LINGER,     0   )        # .set explicitly
socket.setsockopt( zmq.MAXMSGSIZE, ... )        # .set safety ceiling
socket.setsockopt( ...,            ... )        # .set ...
#---------------------------------------------- # ROBUSTNESS CONFIGs

while True:
    message = socket.recv_pyobj()            # .recv() a request from REQ-side
    print( "%s:%s" % ( message.get(1)[0],    #         shall improve robustness
                       message.get(1)[1]     #         for cases other than this
                       )
           )
    socket.send_pyobj( { 1: [ message.get(1)[0], # REP must "answer" to REQ
                              message.get(1)[1]
                              ]
                         }
                  )

---

TARGET_IP   = "<targetIP>"                      # <targetIP> from Step 0
PORT_NUMBER = 8080

socket = context.socket( zmq.REQ )
socket.connect( "tcp://{0:}:{1:}".format( TARGET_IP, PORT_NUMBER ) )
#---------------------------------------------- # ROBUSTNESS CONFIGs
socket.setsockopt( zmq.LINGER,     0   )        # .set explicitly
socket.setsockopt( zmq.MAXMSGSIZE, ... )        # .set safety ceiling
socket.setsockopt( ...,            ... )        # .set ...
#---------------------------------------------- # ROBUSTNESS CONFIGs

name = "Test"
while True:
    message = input( "Test Message" )
    socket.send_pyobj( ( { 1: [ name,           # REQ-side sends a request
                                message         #                  here
                                ]               #          bearing a tuple
                           }                    #             with a dict
                         )                      #           having a list
                       )                        #              for a single key
    #------------------------------------------ # REQ-side now MUST also .recv()
    _ = socket.recv()                           #          before it can .send() again