59 lines
1.5 KiB
Python
Executable File
59 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python3
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import re
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# https://stackoverflow.com/a/6041965
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RE_URL = re.compile(r'(https?://([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-]))')
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RE_EM = re.compile(r'\*(.*?)\*')
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RE_LIST = re.compile(r'(-|[0-9]\.) .*')
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def html(text):
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# Replace angle brackets to prevent XSS
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# Also replace ampersands to prevent surprises.
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text = text.replace('&', '&').replace('<', '<').replace('>', '>')
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html = ['<p>']
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lines = text.split('\n')
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in_code = False
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in_list = False
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for l in lines:
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if l == '':
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in_list = False
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if in_code:
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html.append('</pre>')
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in_code = False
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html.append('</p><p>')
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continue
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if l.startswith(' '):
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in_list = False
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l = l[2:]
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if not in_code:
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html.append('<pre>')
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in_code = True
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html.append(l)
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continue
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if in_code:
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html.append('</pre>')
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in_code = False
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l = RE_EM.sub(r'<em>\1</em>', l)
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l = RE_URL.sub(r'<a href="\1">\1</a>', l)
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if RE_LIST.match(l):
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if in_list:
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html.append('<br>')
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in_list = True
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else:
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in_list = False
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html.append(l)
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if in_code:
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html.append('</pre>')
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html.append('</p>')
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return '\n'.join(html)
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if __name__ == '__main__':
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import sys
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print(html(sys.stdin.read()))
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