def main():
while (True):
# get the file queue for this run (this will lock the queue until it finishes)
feedQueue = FileQueue(crawling_config.DIR_QUEUE, crawling_config.DIR_LOCKS, 'r')
links = feedQueue.getItems()
# goes through links
for linkRaw in links:
linkParts = linkRaw.split('|')
if (len(linkParts) != 2):
# invalid!
continue
link = linkParts[0]
section = linkParts[1]
linkFile = getLinkFile(link)
if (fileExists(linkFile) == False):
# the link is not fetched, we will do it now
crawling_config.DEBUG('Fetching %s.' % link)
fetchLink(link, linkFile, section)
feedQueue.delete()
# count queue files
# do not wait if there are 3+ queue files...
queueFiles = glob.glob(crawling_config.DIR_QUEUE + '*')
if (len(queueFiles) < 3):
crawling_config.DEBUG('Sleeping for %d seconds' % crawling_config.SLEEP_TIME)
time.sleep(crawling_config.SLEEP_TIME)
else:
print 'There are %d queue files, continue immediately!' % (len(queueFiles))
print 'Bye bye'
def main():
global FLAG_SLEEPING # will be set True if sleeping
# get the list of feeds from the 'feeds' directory in the same directory with this script
feedLists = glob.glob(crawling_config.DIR_FEED_LISTS + '*')
while (True):
# get the file queue for this run (this will lock the queue until it finishes)
feedQueue = FileQueue(crawling_config.DIR_QUEUE, crawling_config.DIR_LOCKS)
saved = 0
# goes through feeds
for feedList in feedLists:
feedLock = FileLock(crawling_config.DIR_LOCKS + os.path.basename(feedList))
if (feedLock.isLocked() == False):
# the feed is not locked atm, we may proceed...
# but first, we have to lock it
feedLock.lock()
try:
feedFile = open(feedList, 'r')
crawling_config.DEBUG('Processing %s' % feedList)
feedMode = feedFile.readline().strip()
feedModeConfig = feedFile.readline().strip()
feedUrls = feedFile.read().strip().split('\n')
feedFile.close()
for feedUrl in feedUrls:
feedUrlParts = feedUrl.split(' ')
links = readFeed(feedUrlParts[0], feedMode, feedModeConfig, feedUrlParts[1])
saved += feedQueue.saveList(links)
except IOError:
pass
# removes the lock for other sessions
feedLock.unlock()
else:
# oops, it's locked atm
crawling_config.DEBUG('Bypassed %s because it is being locked.' % feedList)
# frees the file queue
feedQueue.close()
crawling_config.DEBUG('Saved %d links to queue.' % saved)
# checks if SIGINT is sent to this script
if (FLAG_EXIT_NOW):
print 'Stopping now!'
break
FLAG_SLEEPING = True
crawling_config.DEBUG('Sleeping for %d seconds' % crawling_config.SLEEP_TIME)
time.sleep(crawling_config.SLEEP_TIME)
FLAG_SLEEPING = False
print 'Bye bye'