Created
August 5, 2010 13:19
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Create cache from a files containing url (multi-threaded python script)
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| import threading, time, urllib | |
| import fileinput, io | |
| class UrlDownloadThread ( threading.Thread ): | |
| def __init__(self, url): | |
| self.url = url | |
| threading.Thread.__init__(self) | |
| def run(self): | |
| file = urllib.urlopen(self.url) | |
| if file.getcode() != 200: | |
| self.error = 'http code is not 200 : %s' % self.url | |
| class CacheCrawler: | |
| def __init__(self, number, file): | |
| self.number = number | |
| self.pool = {} | |
| self.pos = 0 | |
| self.stream = io.open(file) | |
| self.count = 0; | |
| def start(self): | |
| print "starting thread" | |
| ## init thread | |
| for x in range(0, self.number): | |
| url = self.get_next_url() | |
| if url: | |
| self.pool[x] = UrlDownloadThread(url) | |
| self.pool[x].start() | |
| ## loop accros thread and check status | |
| try: | |
| while True: | |
| time.sleep(0.1) | |
| for x in self.pool: | |
| if not isinstance(self.pool[x], UrlDownloadThread): | |
| #print 'not a valid thread' | |
| continue | |
| if self.pool[x].isAlive(): | |
| #print 'thread is running nothing to do' | |
| continue | |
| url = self.get_next_url() | |
| if not url: | |
| raise StopIteration() | |
| if self.count % 100 == 0: | |
| print "urls downloaded : %s" % self.count | |
| self.pool[x] = UrlDownloadThread(url) | |
| self.pool[x].start() | |
| except StopIteration: | |
| print 'no more url to fetch' | |
| pass | |
| def get_next_url(self): | |
| line = self.stream.readline() | |
| if line: | |
| self.count += 1 | |
| return line | |
| CacheCrawler(5, "urls/recipes.txt").start() |
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