socket&socket實現ftp的get方法、socketserver
阿新 • • 發佈：2017-06-11
socket&socket實現ftp的get方法、socketserver
首先了解socket工作原理，client－server模式
1、socket客戶端：
2、socket類型
3、socket數據流
4、實驗
（1）寫一個client
服務端啟動監聽ip和端口
admindeMacBook-Air-62:~ admin$ nc -l 1234
客戶端連接服務端，發數據，關閉socket
pycharm中添加一個socket_client.py並之行：
import socket HOST = ‘127.0.0.1‘ PORT = 1234 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((HOST,PORT)) s.sendall(‘hello world‘) s.close()
服務端退出socket
admindeMacBook-Air-62:~ admin$ nc -l 1234 hello world admindeMacBook-Air-62:~ admin$
客戶端發送10次
socket_client10.py
#-*-coding: UTF-8 -*-
#coding=utf-8
import socket
import time
HOST = ‘127.0.0.1‘
PORT = 1234
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #元祖（網絡socket，tcp）
s.connect((HOST,PORT))
for i in range(10):
s.sendall(‘%s hello, world\n‘ %i)
time.sleep(1)
s.close()服務端打印10次退出
admindeMacBook-Air-62:~ admin$ nc -l 1234 0 hello, world 1 hello, world 2 hello, world 3 hello, world 4 hello, world 5 hello, world 6 hello, world 7 hello, world 8 hello, world 9 hello, world admindeMacBook-Air-62:~ admin$
（2）寫一個server
socket_server01.py
#coding=UTF-8
import socket
import time
HOST = ‘‘ #表示監聽0.0.0.0
PORT = 1234
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #網絡，tcp
s.bind((HOST,PORT))
s.listen(1) #一次接受一個,寫2也是一次接受一個
connect, address = s.accept() #接受客戶端的請求，返回的是一個連結句柄connect＋地址
print ‘connent‘,connect
print ‘Connected by‘, address
while 1:
data = connect.recv(1024)
if not data: break
connect.sendall(data.upper())
connect.close()admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server01.py
啟動程序並查看端口
admindeMacBook-Air-62:~ admin$ netstat -an | grep 1234 tcp4 0 0 *.1234 *.* LISTEN
客戶端：
socket-client for server.py
#-*-coding: UTF-8 -*- #coding=utf-8 import socket import time HOST = ‘127.0.0.1‘ PORT = 1234 s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #網絡socket，tcp s.connect((HOST,PORT)) s.sendall(‘hello, world‘) #客戶端發送1024字節 data = s.recv(1024) #接受服務器發送過來的數據 s.close() print ‘Received‘, repr(data) #打印服務端發送過來的數據 print data
客戶端之行發送hello world，接受HELLO WORLD
python socket-client for server.py Received ‘HELLO, WORLD‘ HELLO, WORLD admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server01.py connent <socket._socketobject object at 0x10427ec20> Connected by (‘127.0.0.1‘, 63878)
現在讓客戶端一直發，服務端一直接受數據，一端關閉socket連接，另一端也自動關閉連接
server端代碼基本上不變
socket_server01.py
#coding=UTF-8
import socket
import time
HOST = ‘‘ #表示監聽0.0.0.0
PORT = 1234
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #網絡，tcp
s.bind((HOST,PORT))
s.listen(1) #一次接受一個,寫2也是一次接受一個
connect, address = s.accept() #接受客戶端的請求，返回的是一個連結句柄connect＋地址
print ‘connent‘,connect
print ‘Connected by‘, address
while 1:
data = connect.recv(1024)
print data
if not data: break
connect.sendall(data.upper())
connect.close()啟動server，並查看端口：
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server01.py admindeMacBook-Air-62:~ admin$ netstat -an | grep 1234 tcp4 0 0 *.1234 *.* LISTEN
client端代碼：
vim clinet_not_stop.py #-*-coding: UTF-8 -*- #coding=utf-8 import socket import time HOST = ‘127.0.0.1‘ PORT = 1234 s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #網絡socket，tcp s.connect((HOST,PORT)) while True: s.sendall(‘hello, world‘) #客戶端發送1024字節 data = s.recv(1024) #接受服務器發送過來的數據 print data time.sleep(1) s.close()
admindeMacBook-Air-62:host_performance-monitor admin$ python python clinet_not_stop.py client接受到server大寫返回 HELLO, WORLD HELLO, WORLD HELLO, WORLD HELLO, WORLD HELLO, WORLD HELLO, WORLD HELLO, WORLD HELLO, WORLD
同時可以看到server端的來自client的發送數據，全部小寫的hello world
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server01.py connent <socket._socketobject object at 0x10baedc20> Connected by (‘127.0.0.1‘, 64589) hello, world hello, world hello, world hello, world hello, world hello, world hello, world hello, world
按ctrl＋c終止傳輸
新的需求，客戶端發送命令，服務端接收命令並之行，並返回結果，客戶端使用exit或者quit，退出。
server：socket_server_command.py
#-*-coding: UTF-8 -*-
#coding=UTF-8
import socket
from subprocess import Popen,PIPE
HOST = ‘‘ #表示監聽0.0.0.0
PORT = 1234
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #網絡，tcp
s.bind((HOST,PORT))
s.listen(1) #一次接受一個,寫2也是一次接受一個
connect, address = s.accept() #接受客戶端的請求，返回的是一個連結句柄connect＋地址
print ‘connent‘,connect
print ‘Connected by‘, address
while 1:
cmd = connect.recv(1024)
p = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)
stdout = p.stdout.read()
stderr = p.stderr.read()
if stdout:
connect.sendall(stdout)
if stderr:
connect.sendall(stderr)
if not cmd: break
connect.close()client：socket_clinet_command.py
#-*-coding: UTF-8 -*-
#coding=utf-8
import socket
import time
import tab #參考：http://daixuan.blog.51cto.com/5426657/1934112
HOST = ‘127.0.0.1‘
PORT = 1234
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #網絡socket，tcp
s.connect((HOST,PORT))
while True:
cmd = raw_input("Please input cmd:").strip() #把空字符串命令去掉，做一個判斷，非空再發送
if cmd.lower() == ‘exit‘ or cmd.lower() == ‘quit‘:
break
if cmd:
s.sendall(cmd) #客戶端發送命令
data = s.recv(1024) #接受服務器發送過來的數據
print data
s.close()server啟動服務：（有客戶端連接會顯示連接句柄）
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server_command.py connent <socket._socketobject object at 0x109192de0> Connected by (‘127.0.0.1‘, 65512)
客戶端啟動並之行命令：
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_clinet_command.py Please input cmd:date 2017年 6月10日 星期六 18時34分21秒 CST Please input cmd:pwd /Users/admin/Desktop/project/host_performance-monitor Please input cmd:exit
5、實現FTP下載功能：
1、get source dest
2、重復文件，加.new
3、打印出來get下來的文件名是/tmp/hosts 還是/tmp/hosts.new
服務端：socket_server_ftp.py
#-*-coding: UTF-8 -*-
#coding=UTF-8
import socket
from subprocess import Popen,PIPE
HOST = ‘‘ #表示監聽0.0.0.0
PORT = 1234
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #網絡，tcp
s.bind((HOST,PORT))
s.listen(1) #一次接受一個,寫2也是一次接受一個
connect, address = s.accept() #接受客戶端的請求，返回的是一個連結句柄connect＋地址
print ‘connent‘,connect
print ‘Connected by‘, address
while 1:
cmd = connect.recv(1024)
cmd_list = cmd.split()
if cmd_list[0] == ‘get‘: #如果是get方法，讀數據
with open(cmd_list[1]) as fd:
while True: #循環讀取1024字節，然後返回一個數
data = fd.read(1024)
connect.sendall(data)
if not data: #數據讀完了，跳出while循環
connect.sendall(‘EOF‘)
break
if not cmd: break
connect.close()客戶端：socket_clinet_ftp.py
#-*-coding: UTF-8 -*-
#coding=utf-8
import socket
import time
import tab #參考：http://daixuan.blog.51cto.com/5426657/1934112
import os
HOST = ‘127.0.0.1‘
PORT = 1234
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #網絡socket，tcp
s.connect((HOST,PORT))
while True:
cmd = raw_input("Please input cmd:").strip() #把空字符串命令去掉，做一個判斷，非空再發送
if cmd.lower() == ‘exit‘ or cmd.lower() == ‘quit‘:
break
cmd_list = cmd.split()
if len(cmd_list) != 3:
print "Ex: get file1 file2"
continue
else:
s.sendall(cmd) #客戶端發送命令
if not os.path.exists(cmd_list[2]):
dst_file = cmd_list[2]
else:
dst_file = cmd_list[2]+‘.new‘
n = 1 #定義一個變量，第一次打開文件是wb方式，第二次打開文件是a（追加）的方式打開。
while True:
data_rev = s.recv(1024) # 接受服務器發送過來的數據,但是服務器發送完數據，客戶端仍在等待，就會卡住。用EOF，就break
if data_rev.endswith(‘EOF‘):
data = data_rev[:-3]
else:
data = data_rev
if n == 1:
with open(dst_file, ‘wb‘) as fd:
fd.write(data)
else:
with open(dst_file, ‘a‘) as fd:
fd.write(data)
print data
n +=1
print "destination file is %s" %dst_file
if data_rev[-3:] == ‘EOF‘: #如果最後三個字符是EOF，退出ftp
break
s.close()啟動服務端：
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_server_ftp.py connent <socket._socketobject object at 0x104ecbde0> Connected by (‘127.0.0.1‘, 53858)
啟動客戶端：
admindeMacBook-Air-62:host_performance-monitor admin$ python socket_clinet_ftp.py Please input cmd:get /etc/hosts /tmp/hosts destination file is /tmp/hosts Please input cmd:get /etc/hosts /tmp/hosts destination file is /tmp/hosts.new
6、SocketServer
socketserver是一個類，自帶多線程
編寫一個hander類，繼承BaseRequestHander，重寫handle()方法
針對tcp還是udp生成一個server對象
調用server對象的handle_request或者sever_forver方法
本文出自 “梅花香自苦寒來！” 博客，請務必保留此出處http://daixuan.blog.51cto.com/5426657/1934168
socket&socket實現ftp的get方法、socketserver