解决粘包-复杂版

服务端：
import socket
import subprocess
import json
import struct

server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
server.bind(('192.168.43.177',8095))
server.listen(5)
while True:
    conn,client_addr = server.accept()
    while True:
        try:
            cmd = conn.recv(8096)
            if not cmd :break
             #数据解析
            obj = subprocess.Popen(cmd.decode('utf-8'),shell=True,
                                   stdout = subprocess.PIPE,
                                   stderr = subprocess.PIPE)
            stdout = obj.stdout.read()
            stderr = obj.stderr.read()
            total_size = len(stdout)+len(stderr)
            header = {'filename':'djaidj',
                      'total_size':total_size
            }
            header_json = json.dumps(header)
            header_bytes = header_json.encode('utf-8')
            conn.send(struct.pack('i',len(header_bytes)))
            conn.send(header_bytes)
            conn.send(stdout)
            conn.send(stderr)
        except ConnectionResetError:
            break
    conn.close()
server.close()

客户端

import socket
import subprocess
import json
import struct

client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
client.connect(('192.168.43.177',8095))
while True:
    cmd = input('>>:').strip()
    if not cmd:continue
    client.send(cmd.encode('utf-8'))

    obj = client.recv(4)
    header_size = struct.unpack('i',obj)[0]
    header_bytes = client.recv(header_size)
    header_json = header_bytes.decode('utf-8')
    header = json.loads(header_json)
    total_size = header['total_size']
    recv_data = b''
    recv_size = 0
    while recv_size < total_size:
        res = client.recv(1024)
        recv_data += res
        recv_size += len(res)
    print(recv_data.decode('gbk'))
client.close()