def fetch(self, url):
""" Fetch url and return a file-like representation. """
fname = os.path.join(self._cachedir, self._formatter(url))
if not os.path.exists(fname):
time.sleep(self._sleep)
html = urllib.urlopen(url).read()
with codecs.open(fname, 'w', 'utf-8') as f:
soup = BeautifulSoup(html)
f.write(unicode(soup))
return fname
def run(sitemapurl, patt, cachedir, cachejournal, sleep=5):
"""
Args:
sitemapurl: A string URL to an XML sitemap.
patt: A string used for substring matching of the urls in the sitemap.
cachedir: Directory used to cache downloaded HTML files.
cachejournal: A string filename to store records about the
cache directory. Should be considered a tmp file.
sleep: Integer amount of time to sleep between HTTP requests, in seconds.
"""
fetcher = CacheFetcher(cachedir, filename_formatter, sleep)
sitemap = urllib.urlopen(sitemapurl)
with open(cachejournal, 'w') as journal:
for url in extract_sitemap(sitemap, patt):
fname = fetcher.fetch(url)
journal.write('{0},{1}\n'.format(fname, url))