Python多线程下载文件的方法

import httplib
import urllib2
import time
from threading import Thread
from Queue import Queue
from time import sleep
proxy = 'your proxy';
opener = urllib2.build_opener( urllib2.ProxyHandler({'http':proxy}) )
urllib2.install_opener( opener )
ids = {};
for i in range(1,110):
 try:
 listUrl = "http://www.someweb.net/sort/list_8_%d.shtml" % (i);
 print listUrl;
 page = urllib2.urlopen(listUrl).read();
 speUrl = "http://www.someweb.net/soft/";
 speUrlLen = len(speUrl);
 idx = page.find(speUrl,0);
 while idx!=-1:
 dotIdx = page.find(".",idx + speUrlLen);
 if dotIdx != -1:
 id = page[idx + speUrlLen:dotIdx];
 ids[id] = 1;
 idx = page.find("http://www.someweb.net/soft/",idx + speUrlLen);
 except:
 pass;
q = Queue()
NUM = 5
failedId = [];
def do_somthing_using(id):
 try:
 url = "http://www.someweb.net/download.php?softid=%s&type=dx" % (id);
 h2 = httplib.HTTPConnection("your proxy", "you port");
 h2.request("HEAD", url);
 resp = h2.getresponse();
 header = resp.getheaders();
 location = header[3][1]; 
 sContent = urllib2.urlopen(location).read();
 savePath = "C:\someweb\%s.rar" % (id);
 file=open(savePath,'wb');
 file.write(sContent);
 file.close(); 
 print savePath + " saved";
 except:
 pass;
def working():
 while True:
 arguments = q.get()
 do_somthing_using(arguments)
 sleep(1)
 q.task_done()
for i in range(NUM):
 t = Thread(target=working)
 t.setDaemon(True)
 t.start()
for id in ids:
 q.put(id)
q.join()