tcp協議才會有粘包問題，udp協議沒有粘包問題
粘包問題的幾種情況：
d1 和d2間隔時間長，兩者資料量小，不會發生粘包問題
d1和d2間隔時間非常短，資料量小，會發生粘包問題
d2比較大，d1比較小，間隔時間也短，服務端一次性讀取d1和d2的一部分，出現了粘包問題
d1大，d2比較小，獲取d1的一部分，然後獲取了d1的剩餘部分和d2，出現了粘包問題
解決方案：
#tcp服務端.py
import socket
import struct
import subprocess
server = socket.socket(socket.af_inet,socket.sock_stream)
server.bind(('127.0.0.1',8000))
server.listen(5)
print('start...')
while true：
conn, client_address = server.accept()
print(client_address)
while true:
try:
cmd = conn.recv(1024)
print(cmd)
pipeline = subprocess.popen(cmd.decode('utf8'),
shell=true,
stderr=subprocess.pipe, stdout=subprocess.pipe)
stdout = pipeline.stdout.read()
stderr = pipeline.stderr.read()
count_len = len(stdout)+len(stderr)
guding_bytes = struct.pack('i',count_len)
conn.send(guding_bytes)
conn.send(stderr + stdout)
except connectionreseterror:
break
conn.close
#tcp客戶端.py
import struct
from socket import *
client = socket(af_inet,sock_stream)
client.connect(('127.0.0.1',8000))
while true:
cmd = 'dir'
client.send(cmd.encode('utf8'))
guding_bytes = client.recv(4)
count_len = struct.unpack('i',guding_bytes)[0]
data = client.recv(count_len)
print(data.decode('gbk'))
#udp服務端.py
import socket
server = socket.socket(socket.af_inet,socket.sock_dgram)
server.bind(('127.0.0.1',8000))
print('start...')
while true:
data, client_addr = server.recvfrom(1024)
print(client_addr)
print(data)
server.sendto(data.upper(),client_addr)
#udp客戶端.py
import socket
client = socket.socket(socket.af_inet,socket.sock_dgram)
while true:
msg = input('please enter your msg')
client.sendto(msg.encode('utf8'),('127.0.0.1',8000))
data = client.recvfrom(1024)
print(data)
#服務端.py
import socketserver
import subprocess
import struct
class myhandler(socketserver.baserequesthandler):
# 通訊迴圈
def handle(self):
while true:
try:
cmd = self.request.recv(1024)
print(cmd)
pipeline = subprocess.popen(cmd.decode('utf8'),
shell=true,
stderr=subprocess.pipe,
stdout=subprocess.pipe)
stdout = pipeline.stdout.read()
stderr = pipeline.stderr.read()
count_len = len(stdout) + len(stderr)
guding_bytes = struct.pack('i', count_len)
self.request.send(guding_bytes) # 4
self.request.send(stderr + stdout)
except connectionreseterror:
break
# 使用socketserver的連線迴圈(併發),但是使用了自己的通訊迴圈
# myhandler = myhandler()
if __name__ == '__main__':
s = socketserver.threadingtcpserver(('127.0.0.1', 8080), myhandler, bind_and_activate=true)
s.serve_forever()
#客戶端.py
import socket
client = socket.socket(socket.af_inet,socket.sock_stream)
client.connet(('127.0.0.1',8000))
while true:
msg = input(please enter your msg ).strip()
msg = 'client'
if len(msg) == 0: continue
client.send(msg.encode('utf8'))
data =client.recv(1024)
print(data)
#客戶端1.py
import socket
client = socket.socket(socket.af_inet,socket.sock_stream)
client.connet(('127.0.0.1',8000))
while true:
msg = input(please enter your msg ).strip()
msg = 'client'
if len(msg) == 0: continue
client.send(msg.encode('utf8'))
data =client.recv(1024)
print(data)
#客戶端2.py
import socket
client = socket.socket(socket.af_inet,socket.sock_stream)
client.connet(('127.0.0.1',8000))
while true:
msg = input(please enter your msg ).strip()
msg = 'client'
if len(msg) == 0: continue
client.send(msg.encode('utf8'))
data =client.recv(1024)
print(data)
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