解决粘包问题终极版

服务端：

import socket
import subprocess
import struct
import json
#买手机
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
#print(phone)
#绑定手
server.bind(('192.168.0.102', 8080))
server.listen(5)
while True:
    conn, cent = server.accept()
    while True:
        try:
            cmd = conn.recv(1024)
            obj = subprocess.Popen(cmd.decode('utf-8'), shell = True, stdout = subprocess.PIPE, stderr = subprocess.PIPE)
            stdout = obj.stdout.read()
            stderr = obj.stderr.read()
            # 第一步制作固定长度报头
            header_dic = {'md5':'ssssss',
                          'filename':'a.txt',
                          'total_saze':len(stdout)+len(stderr)}
            head_json = json.dumps(header_dic)
            head_bytes = head_json.encode('utf-8')
            #第二部发送报头长度
            conn.send(struct.pack('i', len(head_bytes)))

            # total_saze = len(stdout)+len(stderr)
            # header = struct.pack('i', total_saze)
            #第三步发送报头
            conn.send(head_bytes)
            #第四步发送真是数据
            conn.send(stdout+stderr)

        except ConnectionResetError:
            break
    conn.close()
server.close()





客户端：

import socket
import struct
import json
#买手机
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#拨号
client.connect(('192.168.0.102', 8080))
while True:
    cmd = input('请输入你的指令>>>')
    client.send(cmd.encode('utf-8'))

    # 第一步接收报头长度
    obj = client.recv(4)
    head_saze = struct.unpack('i', obj)[0]
    #header = client.recv(4)
    #第二步再收报头
    head_bytes = client.recv(head_saze)
    # 第三步从报头中解释出报头包含的所有信息
    head_json = head_bytes.decode('utf-8')
    head_dic = json.loads(head_json)
    print(head_dic)


    total_saze = head_dic['total_saze']
    print(total_saze)
    # 第四步接收真实数据
    recv_save = 0
    data_recv = b''
    while recv_save < total_saze:
        res = client.recv(1024)
        data_recv+=res
        recv_save+=len(res)
    #data = client.recv(1024)
    print(len(data_recv.decode('GBK')),'
',data_recv.decode('GBK'))
client.close()