通过python套接字发送json.dumps()

时间:2018-10-25 11:48:06

标签: python json sockets server client

我要创建的是一组服务器和客户端脚本;服务器脚本会提示用户输入原始输入,并将该输入存储在字典中,然后使用json.dumps()函数将其转换为json。然后将转换后的字典存储在jasonFile变量中,然后将其发送给客户端。 json字典正在运行,但我正在努力解决网络方面的问题。

这是我的服务器代码:

def Main():
host = '0.0.0.0'
port = 5000
s.bind((host, port))
s.listen(5)

print "Server Started"


while True:
    addr = s.accept()
    print "Client Connected from IP: " + str(addr)
    serverMessage = "Connection Established: Would you like to download the Json dictionary?"
    s.send(serverMessage)
    clientReply = s.recv(1024)
    if clientReply in ['Y', 'y', 'Yes', 'yes', 'YES']:
        s.send(jasonFile)
        s.close()
    else:
        print "Connection from " + addr + " closed!"
        s.send("Connection Error!")
        s.close()

这是我的客户代码:

def Main():
    host = raw_input("Please enter the server IP you wish to connect to: ")
    port = 5000

    #define client to use socket module to connect via IPV4 and TCP only
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((host, port))

    serverMessage = client.recv(1024)
    print serverMessage

    clientReply = raw_input("Type 'Yes' To download dictionary")
    if clientReply in ['Y', 'Yes', 'y', 'yes', 'YES']:
            client.send(clientReply)
            jasonRecv = client.recv(1024)
            print jasonRecv
    else:
            client.close()
            print "Disconnected from server!"

到目前为止,我还没有将json数据转换回客户端上的字符串,因为服务器在客户端尝试连接时向我抛出错误。

我从IDLE收到的错误消息是:

Server Started
Client Connected from IP: (<socket._socketobject object at 0x000000000401E048>, ('127.0.0.1', 34375))

Traceback (most recent call last): File "D:/Server.py", line 105, in <module>
Main()

File "D:/Server.py", line 94, in Main
s.send(serverMessage)

error: [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

我以为我在addr变量中定义了向其发送数据的地址,但是显然没有?

1 个答案:

答案 0 :(得分:0)

尝试:

conn, addr = s.accept()
...
conn.send(serverMessage)

即将s.调用替换为conn.,该调用代表客户端接受的套接字连接。

来自Python socket API

  

socket.accept()

     

接受连接。套接字必须绑定到一个地址并监听连接。   返回值是一对(conn,地址),其中conn是新的套接字   可用于在连接上发送和接收数据的对象以及地址   是绑定到连接另一端套接字的地址。

示例在页面末尾提供。

另请参阅Python Socket Programming Howto