python tcp 客户端服务端通信，使用json数据格式

最近在做项目中使用python,tcp发送json数据格式，但是网上大都是python2版本的，因此自己弄了一个python3的版本，特此记录一下。

客户端代码如下：

# python 3
#客户端

import numpy as np
import socket
import json

TCP_PORT = 12005



class tcp_client():
    def __init__(self, tcp_port):
        self.s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

        self.s.connect(('127.0.0.1',tcp_port))

        print( self.s.recv(1024).decode())

        data = {'command':'init'}
        str_json = json.dumps(data)
        self.s.send( str_json.encode() )
        str_recv = self.s.recv(1024).decode()
        #print(str_recv)
        data_json = json.loads( str_recv )
        
        
    def step(self):
        
        data ={'command':"take_picture",'parameters':{'position':"1"}}
        #print(data2['parameters']['position'])
        str_json = json.dumps(data)
        self.s.send( str_json.encode() )
        str_recv = self.s.recv(1024).decode()
        data_json = json.loads( str_recv )
        
        
        print("获得拍照结果")
        photo_result = data_json['return']['result']
    
        return photo_result

    def get_result(self):
        data ={'command':"get_result"}

        str_json = json.dumps(data)

        self.s.send(str_json.encode())

        str_recv = self.s.recv(1024).decode()
        
        data_json = json.loads( str_recv )

        res = data_json['return']['result']

        print(res)


    #发送关闭客户端命令
    def close_tcp(self):
        print(" close tcp ... ")
        data = { 'command' : 'close' } 

        str_json = json.dumps(data)
        self.s.send( str_json.encode() )
        self.s.close()    


client = tcp_client( tcp_port = TCP_PORT )

# 测试步骤

client.step()

client.get_result()

client.close_tcp()

服务端代码如下：

# python 3
# 服务端


import numpy as np
import socket
import threading
import json
import logging

TCP_PORT = 12005



def one_servicer():
    #Create The Socket
    s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

    #Listen The Port
    s.bind(('',TCP_PORT))
    s.listen(5)
    print('Waiting for connection...')

    def tcplink(sock,addr):
        print('Accept new connection from %s:%s...' % addr)
        sock.send( ('connect success!').encode() )
        while True:
            data=sock.recv(1024).decode()
            print("data: ", data)

            data_json = json.loads( data )
            #print('data_json["type"]: ', data_json["type"])
            print('data_json["command"]: ', data_json["command"])
            #if data_json["type"] == "step":
                #data = { 'state' : "123", 'reward' : "456", 'done' : "789", 'info' : "ok" } 

            if data_json["command"] == "get_result":
                #返回图片检测结果是ok或者ng
                data = {'command':"get_result",'return':{'result':"ok"}}

            elif data_json["command"] == "take_picture":
            
                if data_json['parameters']['position']== "1":
                    #执行相机拍照代码
                    print("第一次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}} 

                if data_json['parameters']['position']== "2":
                    #执行相机拍照代码
                    print("第二次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}} 

                if data_json['parameters']['position']== "3":
                    #执行相机拍照代码
                    print("第三次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}} 
                
                if data_json['parameters']['position']== "4":
                    #执行相机拍照代码
                    print("第四次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}}

                if data_json['parameters']['position']== "5":
                    #执行相机拍照代码
                    print("第五次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}}

                if data_json['parameters']['position']== "6":
                    #执行相机拍照代码
                    print("第六次拍照完成")
                    data = {'command':"take_picture",'return':{'result':"ok"}}


            elif data_json["command"] == "close":
                break
            str_json = json.dumps(data)
            sock.send( str_json.encode() )
        sock.close()
        print('Connection from %s:%s closed.'%addr)
        
    while True:
        # 开始一个新连接
        sock,addr=s.accept()
        
        # 创建一个线程来处理连接
        t=threading.Thread(target=tcplink(sock,addr))


if __name__ == "__main__":
        one_servicer()