socket官方文档：https://docs.python.org/2/library/socket.html
socket中文详细介绍：http://blog.csdn.net/rebelqsp/article/details/22109925
查看某端口是否被占用(如6666端口)：sudo netstat -nap | grep 6666 如果没有查找到6666端口则说明没有被占用（额，有点废话了~~）
客户端
创建 socket
连接到远程服务器
发送数据
接收数据
关闭 socket
#!/usr/bin/env python
# -*- coding=utf-8 -*-
"""
file: client.py
socket client
"""
import socket
import sys
def socket_client():
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 6666))
except socket.error as msg:
print msg
sys.exit(1)
print s.recv(1024)
while 1:
data = raw_input('please input work: ')
s.send(data)
print s.recv(1024)
if data == 'exit':
break
s.close()
if __name__ == '__main__':
socket_client()
服务器端
打开 socket
绑定到特定的地址以及端口上
监听连接
建立连接
接收/发送数据
#!/usr/bin/env python
# -- coding=utf-8 --
"""
file: service.py
socket service
"""
import socket
import threading
import time
import sys
def socket_service():
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 防止socket server重启后端口被占用（socket.error: [Errno 98] Address already in use）
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('127.0.0.1', 6666))
s.listen(10)
except socket.error as msg:
print msg
sys.exit(1)
print 'Waiting connection...'
while 1:
conn, addr = s.accept()
t = threading.Thread(target=deal_data, args=(conn, addr))
t.start()
def deal_data(conn, addr):
print 'Accept new connection from {0}'.format(addr)
conn.send('Hi, Welcome to the server!')
while 1:
data = conn.recv(1024)
print '{0} client send data is {1}'.format(addr, data)
#time.sleep(1)
if data == 'exit' or not data:
print '{0} connection close'.format(addr)
conn.send('Connection closed!')
break
conn.send('Hello, {0}'.format(data))
conn.close()
if __name__ == '__main__':
socket_service()
copy以上两个脚本代码后，如果你想在本地测试，直接运行这两个脚本便是（注：先运行服务端service.py脚本）,下图左边是运行服务端脚本，右边打开两个终端与服务端socket进行通信。
一屏开多个终端是不是很屌（强烈建议安装此工具，非常方便好用）
终端增强工具Terminator
sudo apt-get install terminator # Ubuntu
yum -y install terminator # Centos
如果你想在两台不同机器上测试，把service.py脚本上传到服务器(假设服务器ip是：192.168.1.2)，然后把client.py连接ip改为：192.168.1.2，service.py监听的ip改为：192.168.1.2，接着运行这两个脚本即可
client.py
s.connect((‘192.168.1.2’, 6666))
service.py
s.bind((‘192.168.1.2’, 6666))
利用socket进行文件、图片等传输
传输文件主要分以下两步：
将要传输的文件的基本信息发送到接收端（文件名、大小等其他信息）
发送端读取文件内容并发送过去,接受端将缓存里面的内容写入文件
注：以下发送文件代码参考：http://www.mamicode.com/info-detail-1346172.html
发送端代码
#!/usr/bin/env python
# -*- coding=utf-8 -*-
"""
file: send.py
socket client
"""
import socket
import os
import sys
import struct
def socket_client():
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 6666))
except socket.error as msg:
print msg
sys.exit(1)
print s.recv(1024)
while 1:
filepath = raw_input('please input file path: ')
if os.path.isfile(filepath):
# 定义定义文件信息。128s表示文件名为128bytes长，l表示一个int或log文件类型，在此为文件大小
fileinfo_size = struct.calcsize('128sl')
# 定义文件头信息，包含文件名和文件大小
fhead = struct.pack('128sl', os.path.basename(filepath),
os.stat(filepath).st_size)
s.send(fhead)
print 'client filepath: {0}'.format(filepath)
fp = open(filepath, 'rb')
while 1:
data = fp.read(1024)
if not data:
print '{0} file send over...'.format(filepath)
break
s.send(data)
s.close()
break
if __name__ == '__main__':
socket_client()
接收端代码
#!/usr/bin/env python
# -*- coding=utf-8 -*-
"""
file: recv.py
socket service
"""
import socket
import threading
import time
import sys
import os
import struct
def socket_service():
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('127.0.0.1', 6666))
s.listen(10)
except socket.error as msg:
print msg
sys.exit(1)
print 'Waiting connection...'
while 1:
conn, addr = s.accept()
t = threading.Thread(target=deal_data, args=(conn, addr))
t.start()
def deal_data(conn, addr):
print 'Accept new connection from {0}'.format(addr)
#conn.settimeout(500)
conn.send('Hi, Welcome to the server!')
while 1:
fileinfo_size = struct.calcsize('128sl')
buf = conn.recv(fileinfo_size)
if buf:
filename, filesize = struct.unpack('128sl', buf)
fn = filename.strip('\00')
new_filename = os.path.join('./', 'new_' + fn)
print 'file new name is {0}, filesize if {1}'.format(new_filename,
filesize)
recvd_size = 0 # 定义已接收文件的大小
fp = open(new_filename, 'wb')
print 'start receiving...'
while not recvd_size == filesize:
if filesize - recvd_size > 1024:
data = conn.recv(1024)
recvd_size += len(data)
else:
data = conn.recv(filesize - recvd_size)
recvd_size = filesize
fp.write(data)
fp.close()
print 'end receive...'
conn.close()
break
if __name__ == '__main__':
socket_service()
转载：https://blog.csdn.net/luckytanggu/article/details/53491892