上海交大校外代理初体验

最近忙着熟悉导师的研究方向和OPNET网络仿真工具，做毕设翻译那会找导师要过几篇英文文献，认真翻译了 Enable Pervasive Healthcare through Continuous Remote Health Monitoring 一文，论文前半部分概述了远程医疗监控(RHM)的体系架构，后半部分介绍了ViiCare产品提供的解决方案。概述性的东西毕竟只是起个引导作用，而且短短几页的论文也不可能会交待较多的细节。如果要结合OPNET来分析网络性能什么的显然是不知从何下手，于是乎习惯性的Google了一番，找到了一篇博士论文，正准备下载的时候… 乖乖，现在已经不是校园网了哟，立马向西电的基友求助，短信刚发出去就想到了个令人激动的消息——隐约记得交大网络信息中心是提供校外访问的代理服务器的，那么？Google一下立马找到了这个链接，网页中提供了局域网和ADSL下的使用方法，都是针对IE的。说白了就是提供了代理服务器的地址和端口号，如果只是在浏览器中使用的话SwitchySharp/Foxyproxy插件新增个代理就好了，试了下速度很理想！

代理服务器

代理服务器名：inproxy.sjtu.edu.cn
端口号：8000 OR 80

连通后会让输入jAccount帐号密码，这个新生已经可以申请了，perfect!

全局代理

虽然大部分情况在浏览器中使用代理就足够了，但有时其他应用程序也许也需要代理访问，这个时候就稍微有点麻烦喽。如果想要全局代理的话则需要模拟http认证，Windows下似乎有p-roxycap比较方便，Linux下暂时还没看到类似的软件，之前也没怎么需要用非浏览器应用中使用代理，这方面了解不太多。舍友yqt用Python写了个DXTL的全局代理，于是乎便借过来用了下，还不错，效果就是下边这个样子：

sjtu-inroxy

需要使用时只需在Terminal下运行python sjtu-inproxy.py即可，很方便。

上代码==>

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# Filename: sjtu-inproxy.py

'''
    *major code is retrieved and modified from webvpn_proxy_via_stunnel.py by
    yqt.  
    http://script-holic.appspot.com/2013/04/22/SPDY%20proxy%E2%86%92HTTP%E4%BB%A3%E7%90%86/%E5%85%A8%E5%B1%80%E4%BB%A3%E7%90%86
'''

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from httplib import HTTPResponse
from SocketServer import ThreadingMixIn
import socket, os, select
import threading
import base64

# Minimize Memory Usage
threading.stack_size(128*1024)

BufferSize = 8192

# local proxy
local_proxy_host = '' # bind all network types
local_proxy_port = 8090

# proxy host
proxy_host = 'inproxy.sjtu.edu.cn'
proxy_port = 80
proxy_user = 'your jAccount user name'
proxy_pass = 'your jAccount user secret'

auth = proxy_user + ':' + proxy_pass

class Handler(BaseHTTPRequestHandler):
    remote = None
    
    # Ignore Connection Failure
    def handle(self):
        try:
            BaseHTTPRequestHandler.handle(self)
        except socket.error: pass
    def finish(self):
        try:
            BaseHTTPRequestHandler.finish(self)
        except socket.error: pass
    
    # CONNECT Data Transfer
    def transfer(self, a, b):
        fdset = [a, b]
        while True:
            r,w,e = select.select(fdset, [], [])
            if a in r:
                data = a.recv(BufferSize)
                if not data: break
                b.sendall(data)
            if b in r:
                data = b.recv(BufferSize)
                if not data: break
                a.sendall(data)
    
    def proxy(self):
        if self.remote is None or self.lastHost != self.headers['Host']:
            self.remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            self.remote.connect((proxy_host, proxy_port))
        self.remote.sendall(self.requestline.encode('ascii') + b'\r\n')
        # Add auth inf.
        self.headers['Proxy-Authorization'] = 'Basic %s' % base64.b64encode(auth)
        #self.remote.sendall('Proxy-Authorization: Basic %s\r\n' % base64.b64encode(auth))
        headerstr = str(self.headers).replace('\r\n', '\n').replace('\n', '\r\n')
        self.remote.sendall(headerstr.encode('ascii') + b"\r\n")
        # Send Post data
        if self.command == 'POST':
            self.remote.sendall(self.rfile.read(int(self.headers['Content-Length'])))
        response = HTTPResponse(self.remote, method=self.command)
        response.begin()
        
        # Reply to the browser
        status = 'HTTP/1.1 ' + str(response.status) + ' ' + response.reason
        self.wfile.write(status.encode('ascii') + b'\r\n')
        hlist = []
        for line in response.msg.headers: # Fixed multiple values of a same name
            if 'TRANSFER-ENCODING' not in line.upper():
                hlist.append(line)
        self.wfile.write(''.join(hlist) + b'\r\n')
        
        if self.command == 'CONNECT' and response.status == 200:
            return self.transfer(self.remote, self.connection)
        else:
            while True:
                response_data = response.read(BufferSize)
                if not response_data: break
                self.wfile.write(response_data)
    
    do_POST = do_GET = do_CONNECT = proxy

class ThreadingHTTPServer(ThreadingMixIn, HTTPServer): 
    #address_family = socket.AF_INET6 # IPV6
    address_family = socket.AF_INET # IPV4

server_address = (local_proxy_host, local_proxy_port)
server = ThreadingHTTPServer(server_address, Handler)

print('Proxy over {}:{}\nPlease set your browser\'s or PAC\'s proxy to {}'.format(proxy_host, proxy_port, server_address))
try:
    server.serve_forever()
except:
    os._exit(1)

文章目录

代理服务器

全局代理