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crawler.py
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crawler.py
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#coding:utf-8
#siddontang@gmail.com
import time
from taskpool import TaskPool
from urllister import URLLister
class Crawler:
def __init__(self, beginUrl):
self._beginUrl = beginUrl
self._urlTasks = []
self._urlMarked = {}
self._imgs = []
self._taskpool = TaskPool(10)
def run(self, depth):
self._crawl(self._beginUrl, depth)
self._taskpool.run()
def getImgs(self):
return self._imgs
def _crawl(self, url, depth):
if depth == 0:
return
if url in self._urlMarked:
return
self._urlMarked[url] = True
def callback(response):
if response.error:
print 'Error', response.error, url
else:
data = response.body
lister = URLLister()
lister.feed(data)
urls = lister.getUrls()
imgs = lister.getImgs()
self._imgs.extend(imgs)
for newUrl in urls:
self._crawl(newUrl, depth - 1)
self._taskpool.spawn(url, callback)
if __name__ == '__main__':
mainPage = Crawler("http://www.qq.com")
mainPage.run(1)
imgs = mainPage.getImgs()
for img in imgs:
print img