tcp套接字粘包解决办法

 1 # Author : Kelvin
 2 # Date : 2019/2/2 17:38
 3 from socket import *
 4 import subprocess
 5 
 6 ip_conf = ("127.0.0.1", 8888)
 7 buffer_capacity = 1024
 8 tcp_server = socket(AF_INET, SOCK_STREAM)
 9 tcp_server.bind(ip_conf)
10 tcp_server.listen(5)
11 while True:
12     conn, addr = tcp_server.accept()
13     while True:
14         try:
15             cmd = conn.recv(buffer_capacity)  # 如果强制断开连接会触发try，try正是解决强制中断连接的问题
16             print("收到的cmd：%s" % cmd)
17             if not cmd:  # 如果使用quit断开连接，服务器会死循环收到空，该判断正是解决此问题
18                 break
19             res = subprocess.Popen(cmd.decode("utf8"), shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE,
20                                    stderr=subprocess.PIPE)
21             err = res.stderr.read()
22             if err:
23                 back_msg = err
24             else:
25                 back_msg = res.stdout.read()
26             if not back_msg:
27                 back_msg = "acute successful!".encode("gbk")
28             length = len(back_msg)
29             conn.send(str(length).encode("gbk"))
30             re_ready = conn.recv(buffer_capacity).decode("utf8")
31             if re_ready == "ready":
32                 conn.send(back_msg)
33         except Exception as e:
34             print(e)
35             break
36 tcp_server.close()

 1 # Author : Kelvin
 2 # Date : 2019/2/2 17:38
 3 from socket import *
 4 
 5 ip_conf = ("127.0.0.1", 8888)
 6 buffer_capacity = 1024
 7 tcp_client = socket(AF_INET, SOCK_STREAM)
 8 tcp_client.connect(ip_conf)
 9 while True:
10     cmd = input("Please input cmd : ")
11     if not cmd:
12         continue
13     if cmd == "quit":
14         break
15     tcp_client.send(cmd.encode("utf8"))
16     re_size = int(tcp_client.recv(buffer_capacity).decode("utf-8"))
17     print("大小:", re_size)
18     tcp_client.send("ready".encode("utf8"))
19     recved_size = 0
20     recved_data = b""
21     while recved_size < re_size:
22         recved_data += tcp_client.recv(buffer_capacity)
23         recved_size = len(recved_data)
24     back_msg = recved_data.decode("gbk")
25     print(back_msg)
26 tcp_client.close()

 1 # Author : Kelvin
 2 # Date : 2019/2/2 17:38
 3 from socket import *
 4 import subprocess
 5 import struct
 6 
 7 ip_conf = ("127.0.0.1", 8888)
 8 buffer_capacity = 1024
 9 tcp_server = socket(AF_INET, SOCK_STREAM)
10 tcp_server.bind(ip_conf)
11 tcp_server.listen(5)
12 while True:
13     conn, addr = tcp_server.accept()
14     while True:
15         try:
16             cmd = conn.recv(buffer_capacity)  # 如果强制断开连接会触发try，try正是解决强制中断连接的问题
17             print("收到的cmd：%s" % cmd)
18             if not cmd:  # 如果使用quit断开连接，服务器会死循环收到空，该判断正是解决此问题
19                 break
20             res = subprocess.Popen(cmd.decode("utf8"), shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE,
21                                    stderr=subprocess.PIPE)
22             err = res.stderr.read()
23             if err:
24                 back_msg = err
25             else:
26                 back_msg = res.stdout.read()
27             if not back_msg:
28                 back_msg = "acute successful!".encode("gbk")
29             length = len(back_msg)
30             re_length = struct.pack("i", length)
31             conn.send(re_length)
32             conn.send(back_msg)
33         except Exception as e:
34             print(e)
35             break
36 tcp_server.close()

 1 # Author : Kelvin
 2 # Date : 2019/2/2 17:38
 3 from socket import *
 4 import struct
 5 ip_conf = ("127.0.0.1", 8888)
 6 buffer_capacity = 1024
 7 tcp_client = socket(AF_INET, SOCK_STREAM)
 8 tcp_client.connect(ip_conf)
 9 while True:
10     cmd = input("Please input cmd : ")
11     if not cmd:
12         continue
13     if cmd == "quit":
14         break
15     tcp_client.send(cmd.encode("utf8"))
16     re_size = struct.unpack("i",tcp_client.recv(4))[0]
17     print("大小:", re_size)
18     recved_size = 0
19     recved_data = b""
20     while recved_size < re_size:
21         recved_data += tcp_client.recv(buffer_capacity)
22         recved_size = len(recved_data)
23     back_msg = recved_data.decode("gbk")
24     print(back_msg)
25 tcp_client.close()