Created
October 25, 2016 22:05
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#!/usr/bin/env python | |
'''Build up a set of URLs using the common crawl index. See | |
http://commoncrawl.org/2015/04/announcing-the-common-crawl-index/ for more info. | |
''' | |
from __future__ import print_function | |
import gzip | |
import logging | |
import os | |
import random | |
import boto3 | |
log = logging.getLogger('urlutils.profiling.get_urls') | |
_here = lambda *paths: os.path.join(os.path.dirname(os.path.abspath(__file__)), *paths) | |
def get_common_crawl_urls(week='2016-07', max_urls=10000000): | |
num_urls = 0 | |
bucket = boto3.resource('s3').Bucket('commoncrawl') | |
objects = bucket.objects.filter(Prefix='cc-index/collections/CC-MAIN-{}/indexes/'.format(week)) | |
objects = [o for o in objects if o.key.endswith('.gz')] | |
# Common Crawl URLS are alphabetically sorted so we don't want to grab only | |
# stuff like http://69.30.227.140/showthread.php?tid=35992 | |
objects = random.sample(objects, 3) | |
for object_ in objects: | |
filename = _here(os.path.basename(object_.key)) | |
if not os.path.exists(filename): | |
log.info('Downloading common crawl index file %s to %s', object_.key, filename) | |
bucket.download_file(object_.key, filename) | |
log.info('Downloaded %s to %s', object_.key, filename) | |
with gzip.open(filename) as fp: | |
for line in fp: | |
if num_urls == max_urls: | |
break | |
yield line.split(' ')[3][1:-2] | |
num_urls += 1 | |
os.unlink(filename) | |
if num_urls == max_urls: | |
break | |
logging.basicConfig(level=logging.INFO) | |
[logging.getLogger(l).setLevel(logging.WARN) for l in ('boto3', 'botocore')] | |
filename = _here('urls.txt') | |
max_urls = 10000000 | |
log.info('Writing {:,} URLs to %s'.format(max_urls), filename) | |
with open(filename, 'w') as fp: | |
for i, url in enumerate(get_common_crawl_urls()): | |
print(url, file=fp) |
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