python实现多线程采集的2个代码例子
代码一：
#!/usr/bin/python
# -*- coding: utf-8 -*-
#encoding=utf-8
import threading
import Queue
import sys
import urllib2
import re
import MySQLdb
#
# 数据库变量设置
#
DB_HOST = '127.0.0.1'
DB_USER = "XXXX"
DB_PASSWD = "XXXXXXXX"
DB_NAME = "xxxx"
#
# 变量设置
#
THREAD_LIMIT = 3
jobs = Queue.Queue(5)
singlelock = threading.Lock()
info = Queue.Queue()
def workerbee(inputlist):
for x in xrange(THREAD_LIMIT):
print 'Thead {0} started.'.format(x)
t = spider()
t.start()
for i in inputlist:
try:
jobs.put(i, block=True, timeout=5)
except:
singlelock.acquire()
print "The queue is full !"
singlelock.release()
# Wait for the threads to finish
singlelock.acquire() # Acquire the lock so we can print
print "Waiting for threads to finish."
singlelock.release() # Release the lock
jobs.join() # This command waits for all threads to finish.
# while not jobs.empty():
# print jobs.get()
def getTitle(url,time=10):
response = urllib2.urlopen(url,timeout=time)
html = response.read()
response.close()
reg = r'<title>(.*?)</title>'
title = re.compile(reg).findall(html)
# title = title[0].decode('gb2312','replace').encode('utf-8')
title = title[0]
return title
class spider(threading.Thread):
def run(self):
while 1:
try:
job = jobs.get(True,1)
singlelock.acquire()
title = getTitle(job[1])
info.put([job[0],title], block=True, timeout=5)
# print 'This {0} is {1}'.format(job[1],title)
singlelock.release()
jobs.task_done()
except:
break;
if __name__ == '__main__':
con = None
urls = []
try:
con = MySQLdb.connect(DB_HOST,DB_USER,DB_PASSWD,DB_NAME)
cur = con.cursor()
cur.execute('SELECT id,url FROM `table_name` WHERE `status`=0 LIMIT 10')
rows = cur.fetchall()
for row in rows:
# print row
urls.append([row[0],row[1]])
workerbee(urls)
while not info.empty():
print info.get()
finally:
if con:
con.close()
代码二：
#!/usr/bin/python
# -*- coding: utf-8 -*-
#encoding=utf-8
#Filename:robot.py
import threading,Queue,sys,urllib2,re
#
# 变量设置
#
THREAD_LIMIT = 3 #设置线程数
jobs = Queue.Queue(5) #设置队列长度
singlelock = threading.Lock() #设置一个线程锁,避免重复调用
urls = ['http://games.sina.com.cn/w/n/2013-04-28/1634703505.shtml','http://games.sina.com.cn/w/n/2013-04-28/1246703487.shtml','http://games.sina.com.cn/w/n/2013-04-28/1028703471.shtml','http://games.sina.com.cn/w/n/2013-04-27/1015703426.shtml','http://games.sina.com.cn/w/n/2013-04-26/1554703373.shtml','http://games.sina.com.cn/w/n/2013-04-26/1512703346.shtml','http://games.sina.com.cn/w/n/2013-04-26/1453703334.shtml','http://games.sina.com.cn/w/n/2013-04-26/1451703333.shtml','http://games.sina.com.cn/w/n/2013-04-26/1445703329.shtml','http://games.sina.com.cn/w/n/2013-04-26/1434703322.shtml','http://games.sina.com.cn/w/n/2013-04-26/1433703321.shtml','http://games.sina.com.cn/w/n/2013-04-26/1433703320.shtml','http://games.sina.com.cn/w/n/2013-04-26/1429703318.shtml','http://games.sina.com.cn/w/n/2013-04-26/1429703317.shtml','http://games.sina.com.cn/w/n/2013-04-26/1409703297.shtml','http://games.sina.com.cn/w/n/2013-04-26/1406703296.shtml','http://games.sina.com.cn/w/n/2013-04-26/1402703292.shtml','http://games.sina.com.cn/w/n/2013-04-26/1353703286.shtml','http://games.sina.com.cn/w/n/2013-04-26/1348703284.shtml','http://games.sina.com.cn/w/n/2013-04-26/1327703275.shtml','http://games.sina.com.cn/w/n/2013-04-26/1239703265.shtml','http://games.sina.com.cn/w/n/2013-04-26/1238703264.shtml','http://games.sina.com.cn/w/n/2013-04-26/1231703262.shtml','http://games.sina.com.cn/w/n/2013-04-26/1229703261.shtml','http://games.sina.com.cn/w/n/2013-04-26/1228703260.shtml','http://games.sina.com.cn/w/n/2013-04-26/1223703259.shtml','http://games.sina.com.cn/w/n/2013-04-26/1218703258.shtml','http://games.sina.com.cn/w/n/2013-04-26/1202703254.shtml','http://games.sina.com.cn/w/n/2013-04-26/1159703251.shtml','http://games.sina.com.cn/w/n/2013-04-26/1139703233.shtml']
def workerbee(inputlist):
for x in xrange(THREAD_LIMIT):
print 'Thead {0} started.'.format(x)
t = spider()
t.start()
for i in inputlist:
try:
jobs.put(i, block=True, timeout=5)
except:
singlelock.acquire()
print "The queue is full !"
singlelock.release()
# Wait for the threads to finish
singlelock.acquire() # Acquire the lock so we can print
print "Waiting for threads to finish."
singlelock.release() # Release the lock
jobs.join() # This command waits for all threads to finish.
# while not jobs.empty():
# print jobs.get()
def getTitle(url,time=10):
response = urllib2.urlopen(url,timeout=time)
html = response.read()
response.close()
reg = r'<title>(.*?)</title>'
title = re.compile(reg).findall(html)
title = title[0].decode('gb2312','replace').encode('utf-8')
return title
class spider(threading.Thread):
def run(self):
while 1:
try:
job = jobs.get(True,1)
singlelock.acquire()
title = getTitle(job)
print 'This {0} is {1}'.format(job,title)
singlelock.release()
jobs.task_done()
except:
break;
if __name__ == '__main__':
workerbee(urls)
