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annotate test/html_norm.py @ 8408:e882a5d52ae5

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refactor: move RateLimitExceeded to roundup.cgi.exceptions RateLimitExceeded is an HTTP exception that raises code 429. Move it to roundup.cgi.exceptions where all the other exceptions that result in http status codes are located. Also make it inherit from HTTPException since it is one. Also add docstrings for all HTTP exceptions and order HTTPExceptions by status code. BREAKING CHANGE: if somebody is importing RateLimitExceeded they will need to change their import. I consider it unlikely anybody is using RateLimitExceeded. Detectors and extensions are unlikely to raise RateLimitExceeded. So I am leaving it out of the upgrading doc. Just doc in change log.
author John Rouillard <rouilj@ieee.org>
date Sun, 10 Aug 2025 21:27:06 -0400
parents 5cadcaa13bed
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """Minimal html parser/normalizer for use in test_templating.
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2
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3 When testing markdown -> html conversion libraries, there are
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4 gratuitous whitespace changes in generated output that break the
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5 tests. Use this to try to normalize the generated HTML into something
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6 that tries to preserve the semantic meaning allowing tests to stop
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7 breaking.
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8
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9 This is not a complete parsing engine. It supports the Roundup issue
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10 tracker unit tests so that no third party libraries are needed to run
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11 the tests. If you find it useful enjoy.
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12
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13 Ideally this would be done by hijacking in some way
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14 lxml.html.usedoctest to get a liberal parser that will ignore
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15 whitespace. But that means the user has to install lxml to run the
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16 tests. Similarly BeautifulSoup could be used to pretty print the html
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17 but again, BeautifulSoup would need to be installed to run the
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18 tests.
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19
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20 """
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21 try:
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22 from html.parser import HTMLParser
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23 except ImportError:
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24 from HTMLParser import HTMLParser # python2
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26 try:
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27 from htmlentitydefs import name2codepoint
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28 except ImportError:
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29 pass # assume running under python3, name2codepoint predefined
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31
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32 class NormalizingHtmlParser(HTMLParser):
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33 """Handle start/end tags and normalize whitespace in data.
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34 Strip doctype, comments when passed in.
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35
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36 Implements normalize method that takes input html and returns a
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37 normalized string leaving the instance ready for another call to
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38 normalize for another string.
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40
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41 Note that using this rewrites all attributes parsed by HTMLParser
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42 into attr="value" form even though HTMLParser accepts other
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43 attribute specification forms.
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44 """
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45
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46 debug = False # set to true to enable more verbose output
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47
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48 current_normalized_string = "" # accumulate result string
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49 preserve_data = False # if inside pre preserve whitespace
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50
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51 def handle_starttag(self, tag, attrs):
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52 """put tag on new line with attributes.
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53 Note valid attributes according to HTMLParser:
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54 attrs='single_quote'
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55 attrs=noquote
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56 attrs="double_quote"
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57 """
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58 if self.debug: print("Start tag:", tag)
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59
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60 self.current_normalized_string += "\n<%s" % tag
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61
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62 for attr in attrs:
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63 if self.debug: print(" attr:", attr)
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64 self.current_normalized_string += ' %s="%s"' % attr
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65
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66 self.current_normalized_string += ">\n"
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67
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68 if tag == 'pre':
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69 self.preserve_data = True
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70
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71 def handle_endtag(self, tag):
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72 if self.debug: print("End tag :", tag)
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73
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74 self.current_normalized_string += "\n</%s>" % tag
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75
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76 if tag == 'pre':
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77 self.preserve_data = False
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78
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79 def handle_data(self, data):
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80 if self.debug: print("Data :", data)
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81 if not self.preserve_data:
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82 # normalize whitespace remove leading/trailing
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83 data = " ".join(data.strip().split())
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84
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85 if data:
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86 self.current_normalized_string += "%s" % data
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87
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88 def handle_comment(self, data):
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89 print("Comment :", data)
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90
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91 def handle_decl(self, data):
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92 print("Decl :", data)
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93
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94 def reset(self):
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95 """wrapper around reset with clearing of csef.current_normalized_string
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96 and reset of self.preserve_data
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97 """
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98 HTMLParser.reset(self)
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99 self.current_normalized_string = ""
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100 self.preserve_data = False
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101
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102 def normalize(self, html):
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103 self.feed(html)
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104 result = self.current_normalized_string
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105 self.reset()
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106 return result
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107
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108
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109 if __name__ == "__main__":
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110 parser = NormalizingHtmlParser()
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111
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112 parser.feed('<div class="markup"><p> paragraph text with whitespace\n and more space <pre><span class="f" data-attr="f">text more text</span></pre></div>')
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113 print("\n\ntest1", parser.current_normalized_string)
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114
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115 parser.reset()
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116
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117 parser.feed('''<div class="markup">
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118 <p> paragraph text with whitespace\n and more space
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119 <pre><span class="f" data-attr="f">text \n more text</span></pre>
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120 </div>''')
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121 print("\n\ntest2", parser.current_normalized_string)
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122 parser.reset()
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123 print("\n\nnormalize", parser.normalize('''<div class="markup">
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124 <p> paragraph text with whitespace\n and more space
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125 <pre><span class="f" data-attr="f">text \n more text &lt;</span></pre>
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126 </div>'''))
Roundup Issue Tracker: http://roundup-tracker.org/