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网络编程之socket

时间:2016-09-27 11:44:41      阅读:176      评论:0      收藏:0      [点我收藏+]

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网络编程之socket
socket:在网络编程中的一个基本组件,也称套接字。
一个套接字就是socket模块中的socket类的一个实例。
套接字包括两个:
  服务器套接字和客户机套接字
套接字的实例化需要3个参数:
  1.地址簇:socket.AF_INET
  2. 流:socket.SOCK_STREAM
  3.使用的协议: 默认为0
服务器套接字:以下简称socket_server
客户端套接字:以下简称socket_client
地址:address=(127.0.0.1,8000)
socket_server使用bind方法绑定address,再调用listen方法去监听,控制排队等候连接的最大数
socket_client使用connect方法连接到服务器,使用的地址与服务器bind的地址相同
套接字有两个方法:
  send(1024) #发送数据,每次最多发送1024bytes
  recv(1024) #接收数据,每次最多接收1024bytes
**python库相关参考文档地址:http:python.org/doc/lib/module_socket.html
*****简单的套接字交互*****
server端:
import socket
# #family type
sk=socket.socket()
print(sk)
address=(127.0.0.1,8000)
sk.bind(address)
sk.listen(3)
print(waiting......)

while 1:
conn, addr = sk.accept()
print(addr)
while 1:
try:
data = conn.recv(1024)
except Exception:
break
if not data: break
print(........., str(data, utf8))
inp=input(>>>)
conn.send(bytes(inp,utf8))

sk.close()

client端:
import socket

sk=socket.socket()
print(sk)

address=(127.0.0.1,8000)
sk.connect(address)

while True:
inp=input(>>>)
if inp == exit:
break
sk.send(bytes(inp,utf8))
data=sk.recv(1024)
print(str(data,utf8))
sk.close()


*****在client端输入shell命令,在服务器端执行命令后,返回结果*****
server端:
import subprocess
import socket
# #family type
sk=socket.socket()
print(sk)
address=(127.0.0.1,8000)
sk.bind(address)
sk.listen(3)
print(waiting......)

 

while 1:
conn, addr = sk.accept()
print(addr)
while 1:
try:
data = conn.recv(1024)
except Exception:
break
if not data: break
print(........., str(data, utf8))

obj=subprocess.Popen(data.decode(utf8),shell=True,stdout=subprocess.PIPE)
cmd_result=obj.stdout.read()

result_len=bytes(str(len(cmd_result)),utf8)
print(>>>>>>,result_len)
conn.sendall(result_len)#粘包现象 1600

conn.recv(1024)#解决粘包

conn.sendall(cmd_result)

sk.close()

client端:
import subprocess
import socket
# #family type
sk=socket.socket()
print(sk)
address=(127.0.0.1,8000)
sk.bind(address)
sk.listen(3)
print(waiting......)

 

while 1:
conn, addr = sk.accept()
print(addr)
while 1:
try:
data = conn.recv(1024)
except Exception:
break
if not data: break
print(........., str(data, utf8))

obj=subprocess.Popen(data.decode(utf8),shell=True,stdout=subprocess.PIPE)
cmd_result=obj.stdout.read()

result_len=bytes(str(len(cmd_result)),utf8)
print(>>>>>>,result_len)
conn.sendall(result_len)#粘包现象 1600

conn.recv(1024)#解决粘包

conn.sendall(cmd_result)

sk.close()

 

*****ftp*****
server端:

import subprocess
import socket
# #family type
import os
sk=socket.socket()
print(sk)
address=(127.0.0.1,8000)
sk.bind(address)
sk.listen(3)
print(waiting......)
BASE_DIR=os.path.dirname(os.path.abspath(__file__))


while 1:
conn, addr = sk.accept()
while 1:
data=conn.recv(1024)
cmd,filename,filesize=str(data,utf8).split(|)
path=os.path.join(BASE_DIR,yuan,filename)
filesize=int(filesize)


f=open(path,ab)

has_receive=0
while has_receive!=filesize:
data=conn.recv(1024)
f.write(data)
has_receive+=len(data)

f.close()


client端:

import socket
import os
sk=socket.socket()
print(sk)

address=(127.0.0.1,8000)
sk.connect(address)

BASE_DIR=os.path.dirname(os.path.abspath(__file__))

while True:
inp=input(>>>).strip()# post|11.png

cmd,path=inp.split(|)

path=os.path.join(BASE_DIR,path)
filename=os.path.basename(path)
file_size=os.stat(path).st_size

file_info=post|%s|%s%(filename,file_size)

sk.sendall(bytes(file_info,utf8))

f=open(path,rb)

has_sent=0
while has_sent!=file_size:
data=f.read(1024)
sk.sendall(data)
has_sent+=len(data)

f.close()
print(上传成功)

 

网络编程之socket

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原文地址:http://www.cnblogs.com/bk770466199/p/5912020.html

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