socket粘包实例解决

server.py

import socket
import subprocess

sk = socket.socket()

sk.bind(('127.0.0.1', 8081))
sk.listen(5)

while True:
conn, addr = sk.accept()
while True:
try:

        recv_data = conn.recv(1024)
        if len(recv_data) == 0:break
        p = subprocess.Popen(str(recv_data, encoding='utf8'), shell=True, stdout=subprocess.PIPE)
        res = p.stdout.read()
        if len(res) == 0:
            send_data = 'cmd_err'

        else:
            send_data = str(res, encoding='gbk')

        send_data = bytes(send_data, encoding='utf8')

        ready_tag = 'Ready|%s' % len(send_data)
        conn.send(bytes(ready_tag, encoding='utf8'))

        feedback = conn.recv(1024)
        feedback = str(feedback, encoding='utf8')

        if feedback.startswith('Start'):
            conn.send(send_data)
    except Exception:
        break

conn.close()

client.py

import socket

cli = socket.socket()

cli.connect(('127.0.0.1', 8081))

while True:

send_data = input('>>:').strip()
if send_data == 'exit':break
if len(send_data) == 0:continue
cli.send(bytes(send_data, encoding='utf-8'))

ready_tag = cli.recv(1024)
ready_tag = str(ready_tag, encoding='utf-8')
if ready_tag.startswith('Ready'):
    msg_size = int(ready_tag.split('|')[-1])

start_tag = 'Start'
cli.send(bytes(start_tag, encoding='utf8'))

recv_size = 0
recv_msg = b''

while recv_size<msg_size:
    recv_data = cli.recv(1024)
    recv_msg += recv_data
    recv_size += len(recv_data)

    print('MSG SIZE %s RECE SIZE %s' % (msg_size, recv_size))
print(str(recv_msg, encoding='utf8'))

cli.close()