网上的爬虫不能用,还是先表达谢意,不过我比较懒不喜欢重复写别人写的教程,只贴出修改,怎么用自己看教程吧。
我自己改了一版可以正常爬:
#!/usr/bin/env python
#coding=utf-8
#
# Openwrt Package Grabber
#
# Copyright (C) 2016 sohobloo.me
# import urllib2
import re
import os
import time # the url of package list page, end with "/"
baseurl = 'https://downloads.openwrt.org/snapshots/trunk/ramips/mt7620/packages/' # which directory to save all the packages, end with "/"
time = time.strftime("%Y%m%d%H%M%S", time.localtime())
savedir = './' + time + '/'
pattern = r'<a href="([^\?].*?)">'
cnt = 0
def fetch(url, path = ''):
if not os.path.exists(savedir + path):
os.makedirs(savedir + path)
print 'fetching package list from ' + url
content = urllib2.urlopen(url + path, timeout=15).read()
items = re.findall(pattern, content)for item in items:
if item == '../':
continue
elif item.endswith('/'):
fetch(url, path + item)
else:
cnt += 1
print 'downloading item %d: '%(cnt) + path + item
if os.path.isfile(savedir + path + item):
print 'file exists, ignored.'
else:
rfile = urllib2.urlopen(baseurl + path + item)
with open(savedir + path + item, "wb") as code:
code.write(rfile.read()) fetch(baseurl) print 'done!'
修改内容:
1. 增加了一级当前时间格式的根目录
2. 修改正则,过滤无效的地址(问号开头)
3. 改为递归爬目录结构
另外很高兴Python知识终于可以用了,撒花。
想更新截图失败,博客园看上去是要死了。