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annotate tools/mdx_urlize.py @ 661:15dbe0ccda95

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Prevent exceptions when viewing downloads in the admin when the file doesn't exist on the filesystem. This is usually seen in development but can also happen in production if the file is missing.
author Brian Neal <bgneal@gmail.com>
date Tue, 14 May 2013 21:02:47 -0500
parents 2adf01661ac5
children
rev   line source
bgneal@658 1 """A more liberal autolinker
bgneal@356 2
bgneal@356 3 Inspired by Django's urlize function.
bgneal@356 4
bgneal@356 5 Positive examples:
bgneal@356 6
bgneal@356 7 >>> import markdown
bgneal@356 8 >>> md = markdown.Markdown(extensions=['urlize'])
bgneal@356 9
bgneal@356 10 >>> md.convert('http://example.com/')
bgneal@356 11 u'<p><a href="http://example.com/">http://example.com/</a></p>'
bgneal@356 12
bgneal@356 13 >>> md.convert('go to http://example.com')
bgneal@356 14 u'<p>go to <a href="http://example.com">http://example.com</a></p>'
bgneal@356 15
bgneal@356 16 >>> md.convert('example.com')
bgneal@356 17 u'<p><a href="http://example.com">example.com</a></p>'
bgneal@356 18
bgneal@356 19 >>> md.convert('example.net')
bgneal@356 20 u'<p><a href="http://example.net">example.net</a></p>'
bgneal@356 21
bgneal@356 22 >>> md.convert('www.example.us')
bgneal@356 23 u'<p><a href="http://www.example.us">www.example.us</a></p>'
bgneal@356 24
bgneal@356 25 >>> md.convert('(www.example.us/path/?name=val)')
bgneal@356 26 u'<p>(<a href="http://www.example.us/path/?name=val">www.example.us/path/?name=val</a>)</p>'
bgneal@356 27
bgneal@356 28 >>> md.convert('go to <http://example.com> now!')
bgneal@356 29 u'<p>go to <a href="http://example.com">http://example.com</a> now!</p>'
bgneal@356 30
bgneal@356 31 Negative examples:
bgneal@356 32
bgneal@356 33 >>> md.convert('del.icio.us')
bgneal@356 34 u'<p>del.icio.us</p>'
bgneal@356 35
bgneal@356 36 """
bgneal@356 37
bgneal@356 38 import markdown
bgneal@356 39
bgneal@356 40 # Global Vars
bgneal@356 41 URLIZE_RE = '(%s)' % '|'.join([
bgneal@356 42 r'<(?:f|ht)tps?://[^>]*>',
bgneal@356 43 r'\b(?:f|ht)tps?://[^)<>\s]+[^.,)<>\s]',
bgneal@356 44 r'\bwww\.[^)<>\s]+[^.,)<>\s]',
bgneal@356 45 r'[^(<\s]+\.(?:com|net|org)\b',
bgneal@356 46 ])
bgneal@356 47
bgneal@356 48 class UrlizePattern(markdown.inlinepatterns.Pattern):
bgneal@356 49 """ Return a link Element given an autolink (`http://example/com`). """
bgneal@356 50 def handleMatch(self, m):
bgneal@356 51 url = m.group(2)
bgneal@356 52
bgneal@356 53 if url.startswith('<'):
bgneal@356 54 url = url[1:-1]
bgneal@356 55
bgneal@356 56 text = url
bgneal@356 57
bgneal@356 58 if not url.split('://')[0] in ('http','https','ftp'):
bgneal@356 59 if '@' in url and not '/' in url:
bgneal@356 60 url = 'mailto:' + url
bgneal@356 61 else:
bgneal@356 62 url = 'http://' + url
bgneal@356 63
bgneal@658 64 el = markdown.util.etree.Element("a")
bgneal@356 65 el.set('href', url)
bgneal@658 66 el.text = markdown.util.AtomicString(text)
bgneal@356 67 return el
bgneal@356 68
bgneal@356 69 class UrlizeExtension(markdown.Extension):
bgneal@356 70 """ Urlize Extension for Python-Markdown. """
bgneal@356 71
bgneal@356 72 def extendMarkdown(self, md, md_globals):
bgneal@356 73 """ Replace autolink with UrlizePattern """
bgneal@356 74 md.inlinePatterns['autolink'] = UrlizePattern(URLIZE_RE, md)
bgneal@356 75
bgneal@356 76 def makeExtension(configs=None):
bgneal@356 77 return UrlizeExtension(configs=configs)
bgneal@356 78
bgneal@356 79 if __name__ == "__main__":
bgneal@356 80 import doctest
bgneal@356 81 doctest.testmod()