class ImageDown:
def __init__(self, urls, location, urlCache):
self._urls = list(set(urls))
self._location = location
if not os.path.exists(location):
os.mkdir(location)
self._cache = urlCache
self._taskpool = TaskPool(10)
def addUrls(self, urls):
self._urls.extend(list(set(urls)))
def run(self):
urls = []
urls, self._urls = self._urls, urls
for url in urls:
self._down(url)
self._taskpool.run()
def _down(self, url):
if self._cache.get(url):
return
def callback(response):
if response.error:
print 'Error', response.error, url
else:
data = response.body
self._writeImage(url, data)
self._taskpool.spawn(url, callback)
def _writeImage(self, url, data):
try:
fileName = (url.split('/')[-1])
fileExt = os.path.splitext(fileName)[-1]
fileName = hashlib.md5(data).hexdigest() + fileExt
fullName = os.path.join(self._location, fileName)
if not os.path.exists(fullName):
with open(fullName, 'wb') as f:
f.write(data)
self._cache.set(url, fullName)
except:
print 'write image %s error %s' % (url, traceback.format_exc())
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)
