介绍
本文介绍如何用python脚本实现socket通信，在一台服务器上开一个端口监听，其他机器通过telnet连进来，模仿B/S模式进行通信。
正文
一共两个文件。
webserver.py
import socket
import re
import os
PORT = 8080
# Create a Server Socket
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind((‘0.0.0.0‘, PORT))
serversocket.listen(5) # Open socket for listening, max of 5 connections
# Take a request "string"
def process_request(reqdata):
request_headers = {}
# Loop through each line and record the request headers
for line in reqdata.split("\r\n"):
# If the line contains a colon, it‘s a header
if (line.find(‘:‘) != -1):
(key, value) = line.split(": ", 1)
request_headers[key] = value
# Maybe it‘s a GET request...
elif (line.find("GET") != -1):
location = re.findall(r‘^GET (.*) HTTP/.*‘, line)
if len(location):
request_headers[‘GET‘] = location[0]
return request_headers
# Get a response
def process_response(request):
r = "HTTP/1.0 200 OK\n"
r += "Content-type: text/html\n\n"
url = request.get(‘GET‘, ‘/index.html‘)
r += "You‘re running: %s<br/>\n" % request.get(‘User-Agent‘, ‘unknown‘)
r += "You asked for: %s<br/>\n" % url
if os.path.isfile("." + url):
r += "Here it is: \n"
f = open("." + url)
r += f.read()
return r
while True:
print "Server listening on port: ", PORT
connection, address = serversocket.accept()
running = True
data = ""
while running:
buf = connection.recv(1024)
requestdone = False
if len(buf) > 0:
data += buf
if buf.find("\r\n") != -1:
requestdone = True
print "End of request found!"
else:
print "read: ‘%s‘" % buf
if requestdone:
# Data should now contain a string of the entire request
request = process_request(data)
connection.send(process_response(request));
# Disconnect our client
connection.close()
running = False
else:
running = False
test.html
<html> <head> <title>Mooo</title> </head> <body> <h1>Sample file</h1> <p>It has some stuff in it. Maybe even some lists.</p> <ul> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> <li>Item 4</li> </ul> </body> </html>
测试
a. 在服务端运行:python webserver.py
[[email protected] socket_lesson]$ python webserver.py
Server listening on port: 8080
End of request found!
Server listening on port: 8080
b. 在另外一台机器上执行：telnet $IP 8080
[[email protected] ~]$ telnet 10.9.214.167 8080 Trying 10.9.214.167... telnet: connect to address 10.9.214.167: Connection refused [[email protected] ~]$ telnet 10.9.214.167 8080 Trying 10.9.214.167... Connected to 10.9.214.167. Escape character is ‘^]‘. GET /test.html HTTP/1.1 HTTP/1.0 200 OK Content-type: text/html You‘re running: unknown<br/> You asked for: /test.html<br/> Here it is: <html> <head> <title>Mooo</title> </head> <body> <h1>Sample file</h1> <p>It has some stuff in it. Maybe even some lists.</p> <ul> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> <li>Item 4</li> </ul> </body> </html> Connection closed by foreign host.
c. 然后输入:GET /test.html HTTP/1.1
这时服务端会把test.html的内容返回。
时间： 2024-08-23 14:34:12