def downloadFromList(alist, directory=".", timeout=10):
"""Get files from a list of urls.
return : list, contained the failure fetch"""
failure = []
for url in alist:
print alist.index(url),
stream = getStream(url, timeout=timeout)
file_name = getFilenameFromURL(url)
if not stream or not writeBinFile(stream, file_name, directory):
failure.append(url)
return failure
def downloadFromQueue(queue, failure, directory='.', timeout=10):
"""Get files from a list of urls.
return : list, contained the failure fetch"""
while not queue.empty():
url = queue.get()
stream = getStream(url, timeout=timeout)
file_name = getFilenameFromURL(url)
if stream and writeBinFile(stream, file_name, directory):
queue.task_done()
print "Fetching", url, 'done.'
continue
failure.append(url)
queue.task_done()
return failure
def main():
# 开始准备
prepare()
while_n = 0 # 循环计数器
imglist = []
makedir(Config.directory)
print 'Generate search url'
URL = baseURL()
# 下载 #############
# 获取搜索结果数量并与_count比较取其较小值
count = min(searchResult(URL), Config.count)
# 没有搜索结果时退出
if not count:
print "No search result at current condition."
sys.exit(1)
# 获得指定数量的url, 存放于list
print 'Fetching page',
while len(imglist) < count:
print while_n,
while_n += 1
tmplist = getImageUrlList(URL)
imglist = imglist + tmplist
URL = nextPage(URL, len(tmplist))
print '' # 换行
count = len(imglist)
print "There're %d files to download" % count
# 将已有文件从imglist中去除
imglist = [url for url in imglist
if not getFilenameFromURL(url) in os.listdir(Config.directory)]
print "There's %d files already downloaded." % (count - len(imglist))
# 下载该list
print 'Fetching list of %d files' % len(imglist)
queue = Queue()
for url in imglist:
queue.put(url)
failure = []
for i in range(Config.thread_count):
start_new_thread(downloadFromQueue, (
queue, failure, Config.directory, Config.timeout))
queue.join()
print "%d failed to fetch." % len(failure)
count = min(searchResult(searchURL), count)
# 没有搜索结果时退出
if not count:
print "No search result at current condition."
sys.exit(1)
# 获得指定数量的url, 存放于list ,one page by one page
print 'Fetching page',
while len(imglist) < count:
print while_n,
#mark the times of while
while_n += 1
tmplist = getImageUrlList(searchURL)
imglist = imglist + tmplist
searchURL = nextPage(searchURL, len(tmplist))
print '' # 换行
count = len(imglist)
print "There're %d files to download" % count
# 将已有文件从imglist中去除
imglist = [url for url in imglist if not getFilenameFromURL(url) in os.listdir(directory)]
print "There's %d files already downloaded." % (count - len(imglist))
# 下载该list 使用超时20 10好像小了点
print 'Fetching list of %d files' % len(imglist)
failure = threadDownloadFromList(imglist, directory=directory, timeout=20)
print "%d failed to fetch." % len(failure)
# 清理
# 1.添加后缀
print 'Adding extension ...',
for fname in os.listdir(directory):
addExtension(directory + os.sep + fname, '.jpg')
print 'done.'
def run(self):
stream = getStream(self.url, timeout=self.timeout)
file_name = getFilenameFromURL(self.url)
if not stream or not writeBinFile(stream, file_name, self.directory):
self.failure.append(self.url)
self.finished = True
