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本帖最后由 当回首遇上转身 于 2017-4-30 21:01 编辑
系统版本 windows7 python版本3.5.2
网站图片源码没有http:前缀该如何处理?
参考于:小甲鱼python爬虫教程《论一只爬虫的自我修养4:OOXX》
- import urllib.request
- import os
- def url_open(url):
- req =urllib.request.Request(url)
- req.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36')
- response = urllib.request.urlopen(url)
- html = response.read()
- print(url)
- return html
-
- def get_page(url):
- html = url_open(url).decode('utf-8')
- a = html.find('current-comment-page') + 23
- b = html.find(']',a)
- return html[a:b]
-
- def find_imgs(url):
- html = url_open(url).decode('utf-8')
- img_addrs = []
- a = html.find('img src=')
-
- while a!= -1:
- b = html.find('.jpg', a, a+255)
- if b != -1:
- img_addrs.append(html[a+9:b+4])
- else:
- b = a + 9
-
- a = html.find('img src=',b)
- for each in img_addrs:
- print(each)
- return img_addrs
-
- def save_imgs(folder, img_addrs):
- for each in img_addrs:
- filename = each.split('/')[-1]
- with open(filename, 'wb') as f:
- img = url_open(each)
- f.write(img)
-
- def download_mm(folder='OOXX', pages=10):
- os.mkdir(folder)
- os.chdir(folder)
- url = "http://jandan.net/ooxx/"
- page_num = int(get_page(url))
- for i in range(pages):
- page_num -= i
- page_url = url + 'page-' + str(page_num) + '#comments'
- img_addrs = find_imgs(page_url)
- save_imgs(folder, img_addrs)
-
- if __name__ == '__main__':
- download_mm()
复制代码
显示错误
- ============ RESTART: E:\python\practice\2017.4.30\download_mm.py ============
- [url]http://jandan.net/ooxx/[/url]
- [url]http://jandan.net/ooxx/page-26#comments[/url]
- //wx2.sinaimg.cn/mw600/661eb95cly1ff3biqf7yqj20iz0sgq7o.jpg
- Traceback (most recent call last):
- File "E:\python\practice\2017.4.30\download_mm.py", line 69, in <module>
- download_mm()
- File "E:\python\practice\2017.4.30\download_mm.py", line 65, in download_mm
- save_imgs(folder, img_addrs)
- File "E:\python\practice\2017.4.30\download_mm.py", line 50, in save_imgs
- img = url_open(each)
- File "E:\python\practice\2017.4.30\download_mm.py", line 7, in url_open
- req =urllib.request.Request(url)
- File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 269, in __init__
- self.full_url = url
- File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 295, in full_url
- self._parse()
- File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 324, in _parse
- raise ValueError("unknown url type: %r" % self.full_url)
- ValueError: unknown url type: '//wx2.sinaimg.cn/mw600/661eb95cly1ff3biqf7yqj20iz0sgq7o.jpg'
- >>>
复制代码
本帖最后由 ooxx7788 于 2017-5-6 09:09 编辑
自己在前面加上http呗
33行
img_addrs.append('http:'+tml[a+9:b+4])
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