CODEWITHSUNDEEP
pythonhtmlhtml-parsing
Mridang Agarwalla
Mridang Agarwalla

Reputation: 44958

Extract absolute links from a page using HTMLParser

I'm using the following snippet to extract all the links on a page using HTMLParser. I get quite a few relative URLs. How can I convert these to absolute URLs for a domain e.g. www.exmaple.com

import htmllib, formatter
import urllib, htmllib, formatter

class LinksExtractor(htmllib.HTMLParser):

   def __init__(self, formatter):
      htmllib.HTMLParser.__init__(self, formatter)
      self.links = []

   def start_a(self, attrs):
      if len(attrs) > 0 :
         for attr in attrs :
            if attr[0] == "href":
                self.links.append(attr[1])

   def get_links(self):
      return self.links


format = formatter.NullFormatter()
htmlparser = LinksExtractor(format)

data = urllib.urlopen("http://cis.poly.edu/index.htm")
htmlparser.feed(data.read())
htmlparser.close()

links = htmlparser.get_links()
print links

Thanks

Upvotes: 3

Views: 2975

Answers (1)

agf
agf

Reputation: 176730

You want 

urlparse.urljoin(base, url[, allow_fragments])

http://docs.python.org/library/urlparse.html#urlparse.urljoin

This allows you to give an absolute or base url, and join it with a relative url. Even if they have overlapping pieces, it should work.

Upvotes: 7

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