def crawl(self):
worker_init = WorkerInit(self.config.worker_config, self.input_queue,
self.output_queue, self.build_logger())
self.workers = self.get_workers(self.config, worker_init)
queue_size = len(self.start_url_splits)
for start_url_split in self.start_url_splits:
self.input_queue.put(
WorkerInput(start_url_split, True, 0, start_url_split.netloc,
self.config.content_check), False)
self.start_workers(self.workers, self.input_queue, self.output_queue)
self.start_progress()
while True:
page_crawl = self.output_queue.get()
queue_size -= 1
new_worker_inputs = self.process_page_crawl(page_crawl)
# We only process new pages if we did not exceed configured depth
for worker_input in new_worker_inputs:
queue_size += 1
self.input_queue.put(worker_input, False)
self.progress(page_crawl, len(self.site.pages), queue_size)
if queue_size <= 0:
self.stop_workers(self.workers, self.input_queue,
self.output_queue)
self.stop_progress()
return self.site
def test_base_url(self):
page_crawler, url_split = self.get_page_crawler("/alone.html")
page_crawl = page_crawler._crawl_page(
WorkerInput(url_split, True, 0, url_split.netloc))
self.assertEqual(1, len(page_crawl.links))
self.assertEqual('http://www.example.com/test.html',
page_crawl.links[0].url_split.geturl())
def test_crawl_404(self):
page_crawler, url_split = self.get_page_crawler(
"/sub/small_image_bad.gif")
page_crawl = page_crawler._crawl_page(
WorkerInput(url_split, True, 0, url_split.netloc))
self.assertEqual(404, page_crawl.status)
self.assertFalse(page_crawl.links)
self.assertFalse(page_crawl.is_html)
self.assertFalse(page_crawl.is_timeout)
self.assertFalse(page_crawl.is_redirect)
def test_crawl_resource(self):
page_crawler, url_split = self.get_page_crawler("/sub/small_image.gif")
page_crawl = page_crawler._crawl_page(
WorkerInput(url_split, True, 0, url_split.netloc))
self.assertEqual(200, page_crawl.status)
self.assertFalse(page_crawl.links)
self.assertFalse(page_crawl.is_html)
self.assertFalse(page_crawl.is_timeout)
self.assertFalse(page_crawl.is_redirect)
self.assertTrue(page_crawl.exception is None)
def test_page_crawler(self):
page_crawler, url_split = self.get_page_crawler("/index.html")
input_queue = page_crawler.input_queue
output_queue = page_crawler.output_queue
input_queue.put(WorkerInput(url_split, True, 0, url_split.netloc))
input_queue.put(WORK_DONE)
page_crawler.crawl_page_forever()
page_crawl = output_queue.get()
self.assertEqual(200, page_crawl.status)
self.assertTrue(len(page_crawl.links) > 0)
def process_links(self, page_crawl):
links_to_process = []
source_url_split = page_crawl.original_url_split
if page_crawl.final_url_split:
source_url_split = page_crawl.final_url_split
for link in page_crawl.links:
url_split = link.url_split
if not self.config.should_download(url_split):
self.logger.debug(
"Won't download %s. Is local? %s", url_split,
LazyLogParam(lambda: self.config.is_local(url_split)))
continue
page_status = self.page_statuses.get(url_split, None)
page_source = PageSource(source_url_split, link.source_str,
link.target)
if not page_status:
# We never encountered this url before
self.page_statuses[url_split] = PageStatus(
PAGE_QUEUED, [page_source])
should_crawl = self.config.should_crawl(
url_split, page_crawl.depth)
links_to_process.append(
WorkerInput(url_split, should_crawl, page_crawl.depth + 1,
page_crawl.site_origin,
self.config.content_check))
elif page_status.status == PAGE_CRAWLED:
# Already crawled. Add source
if url_split in self.pages:
self.pages[url_split].add_sources([page_source])
else:
# TODO the final url is different. need a way to link it...
pass
elif page_status.status == PAGE_QUEUED:
# Already queued for crawling. Add source.
page_status.sources.append(page_source)
return links_to_process
def test_crawl_page(self):
page_crawler, url_split = self.get_page_crawler("/index.html")
page_crawl = page_crawler._crawl_page(
WorkerInput(url_split, True, 0, url_split.netloc))
self.assertEqual(200, page_crawl.status)
self.assertTrue(page_crawl.is_html)
self.assertFalse(page_crawl.is_timeout)
self.assertFalse(page_crawl.is_redirect)
self.assertTrue(page_crawl.exception is None)
a_links = [link for link in page_crawl.links if link.type == 'a']
img_links = [link for link in page_crawl.links if link.type == 'img']
script_links = [link for link in page_crawl.links
if link.type == 'script']
link_links = [link for link in page_crawl.links if link.type == 'link']
self.assertEqual(5, len(a_links))
self.assertEqual(1, len(img_links))
self.assertEqual(1, len(script_links))
self.assertEqual(1, len(link_links))
