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issue2551350 - Python changes for 3.12 with roundup 2.3.0 cgitb.py Fix change in pydoc.html.header() signature. It dropped foreground and background color arguments in 3.11 and newer. Also enable test code for the html function.
author John Rouillard <rouilj@ieee.org>
date Tue, 14 May 2024 21:27:28 -0400
parents 6c5f8da9fca7
children 9c3ec0a5c7fc
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1 #
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2 # This module was written by Ka-Ping Yee, <ping@lfw.org>.
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3 #
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4
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5 """Extended CGI traceback handler by Ka-Ping Yee, <ping@lfw.org>.
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6 """
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7 from __future__ import print_function
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8 __docformat__ = 'restructuredtext'
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9
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10 import inspect
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11 import keyword
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12 import linecache
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13 import os
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14 import pydoc
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15 import sys
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16 import tokenize
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17 import traceback
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18
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19 from roundup.anypy.html import html_escape
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20 from roundup.anypy.strings import s2b
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21 from roundup.cgi import TranslationService
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22
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23
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24 def get_translator(i18n=None):
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25 """Return message translation function (gettext)
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26
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27 Parameters:
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28 i18n - translation service, such as roundup.i18n module
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29 or TranslationService object.
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30
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31 Return ``gettext`` attribute of the ``i18n`` object, if available
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32 (must be a message translation function with one argument).
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33 If ``gettext`` cannot be obtained from ``i18n``, take default
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34 TranslationService.
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35
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36 """
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37 try:
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38 return i18n.gettext
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39 except AttributeError:
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40 return TranslationService.get_translation().gettext
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41
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42
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43 def breaker():
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44 return ('<body bgcolor="white">' +
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45 '<font color="white" size="-5"> > </font> ' +
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46 '</table>' * 5)
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47
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48
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49 def niceDict(indent, dict):
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50 l = []
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51 for k in sorted(dict):
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52 v = dict[k]
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53 l.append('<tr><td><strong>%s</strong></td><td>%s</td></tr>' % (
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54 k, html_escape(repr(v))))
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55 return '\n'.join(l)
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56
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57
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58 def pt_html(context=5, i18n=None):
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59 _ = get_translator(i18n)
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60 esc = html_escape
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61 exc_info = [esc(str(value)) for value in sys.exc_info()[:2]]
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62 l = [_('<h1>Templating Error</h1>\n'
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63 '<p><b>%(exc_type)s</b>: %(exc_value)s</p>\n'
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64 '<p class="help">Debugging information follows</p>'
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65 ) % {'exc_type': exc_info[0], 'exc_value': exc_info[1]},
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66 '<ol>', ]
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67 from roundup.cgi.PageTemplates.Expressions import TraversalError
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68 t = inspect.trace(context)
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69 t.reverse()
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70 for frame, _file, _lnum, _func, _lines, _index in t:
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71 args, varargs, varkw, locals = inspect.getargvalues(frame)
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72 if '__traceback_info__' in locals:
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73 ti = locals['__traceback_info__']
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74 if isinstance(ti, TraversalError):
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75 s = []
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76 for name, info in ti.path:
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77 s.append(_('<li>"%(name)s" (%(info)s)</li>')
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78 % {'name': name, 'info': esc(repr(info))})
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79 s = '\n'.join(s)
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80 l.append(_(
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81 '<li>Looking for "%(name)s", '
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82 'current path:<ol>%(path)s</ol></li>'
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83 ) % {'name': ti.name, 'path': s})
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84 else:
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85 l.append(_('<li>In %s</li>') % esc(str(ti)))
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86 if '__traceback_supplement__' in locals:
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87 ts = locals['__traceback_supplement__']
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88 if len(ts) == 2:
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89 supp, context = ts
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90 s = _('A problem occurred in your template "%s".') \
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91 % str(context.id)
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92 if context._v_errors:
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93 s = s + '<br>' + '<br>'.join(
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94 [esc(x) for x in context._v_errors])
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95 l.append('<li>%s</li>' % s)
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96 elif len(ts) == 3:
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97 supp, context, info = ts
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98 l.append(_('''
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99 <li>While evaluating the %(info)r expression on line %(line)d
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100 <table class="otherinfo" style="font-size: 90%%">
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101 <tr><th colspan="2" class="header">Current variables:</th></tr>
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102 %(globals)s
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103 %(locals)s
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104 </table></li>
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105 ''') % {
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106 'info': info,
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107 'line': context.position[0] or -1,
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108 'globals': niceDict(' ', context.global_vars),
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109 'locals': niceDict(' ', context.local_vars)
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110 })
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111
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112 l.append('''
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113 </ol>
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114 <table style="font-size: 80%%; color: gray">
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115 <tr><th class="header" align="left">%s</th></tr>
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116 <tr><td><pre>%s</pre></td></tr>
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117 </table>''' % (_('Full traceback:'), html_escape(''.join(
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118 traceback.format_exception(*sys.exc_info())
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119 ))))
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120 l.append('<p>&nbsp;</p>')
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121 return '\n'.join(l)
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122
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123
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124 def html(context=5, i18n=None):
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125 _ = get_translator(i18n)
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126 etype, evalue = sys.exc_info()[0], sys.exc_info()[1]
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127 if type(etype) is type:
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128 etype = etype.__name__
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129 pyver = 'Python ' + sys.version.split()[0] + '<br>' + sys.executable
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130
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131 if sys.version_info[0:2] >= (3,11):
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132 head = pydoc.html.heading(
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133 _('<font size=+1><strong>%(exc_type)s</strong>: '
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134 '%(exc_value)s</font>')
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135 % {'exc_type': etype, 'exc_value': evalue}, pyver)
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136 else:
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137 head = pydoc.html.heading(
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138 _('<font size=+1><strong>%(exc_type)s</strong>: '
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139 '%(exc_value)s</font>')
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140 % {'exc_type': etype, 'exc_value': evalue},
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141 '#ffffff', '#777777', pyver)
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142
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143 head = head + (_('<p>A problem occurred while running a Python script. '
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144 'Here is the sequence of function calls leading up to '
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145 'the error, with the most recent (innermost) call first. '
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146 'The exception attributes are:'))
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147
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148 indent = '<tt><small>%s</small>&nbsp;</tt>' % ('&nbsp;' * 5)
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149 traceback = []
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150 for frame, file, lnum, func, lines, index in inspect.trace(context):
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151 if file is None:
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152 link = _("&lt;file is None - probably inside <tt>eval</tt> "
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153 "or <tt>exec</tt>&gt;")
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154 else:
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155 file = os.path.abspath(file)
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156 link = '<a href="file:%s">%s</a>' % (file, pydoc.html.escape(file))
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157 args, varargs, varkw, locals = inspect.getargvalues(frame)
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158 if func == '?':
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159 call = ''
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160 else:
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161 call = _('in <strong>%s</strong>') % \
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162 func + inspect.formatargvalues(
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163 args, varargs, varkw, locals,
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164 formatvalue=lambda value: '=' + pydoc.html.repr(value))
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165
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166 level = '''
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167 <table width="100%%" bgcolor="#dddddd" cellspacing=0 cellpadding=2 border=0>
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168 <tr><td>%s %s</td></tr></table>''' % (link, call)
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169
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170 if index is None or file is None:
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171 traceback.append('<p>' + level)
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172 continue
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173
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174 # do a file inspection
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175 names = []
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176
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177 def tokeneater(type, token, start, end, line, names=names):
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178 if type == tokenize.NAME and token not in keyword.kwlist:
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179 if token not in names:
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180 names.append(token)
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181 if type == tokenize.NEWLINE: raise IndexError # noqa: E701
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182
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183 def linereader(file=file, lnum=[lnum]):
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184 line = s2b(linecache.getline(file, lnum[0]))
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185 lnum[0] = lnum[0] + 1
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186 return line
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187
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188 # The interface that is tokenize.tokenize in Python 3 is
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189 # called tokenize.generate_tokens in Python 2. However,
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190 # Python 2 has tokenize.tokenize with a different interface,
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191 # and Python 3 has an undocumented generate_tokens function,
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192 # also with a different interface, so a version check is
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193 # needed instead of checking for which functions exist.
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194 if sys.version_info[0] > 2:
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195 tokenize_fn = tokenize.tokenize
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196 else:
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197 tokenize_fn = tokenize.generate_tokens
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198 try:
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199 for t in tokenize_fn(linereader):
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200 tokeneater(*t)
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201 except IndexError:
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202 pass
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203 lvals = []
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204 for name in names:
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205 if name in frame.f_code.co_varnames:
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206 if name in locals:
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207 value = pydoc.html.repr(locals[name])
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208 else:
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209 value = _('<em>undefined</em>')
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210 name = '<strong>%s</strong>' % name
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211 else:
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212 if name in frame.f_globals:
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213 value = pydoc.html.repr(frame.f_globals[name])
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214 else:
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215 value = _('<em>undefined</em>')
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216 name = '<em>global</em> <strong>%s</strong>' % name
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217 lvals.append('%s&nbsp;= %s' % (name, value))
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218 if lvals:
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219 lvals = ', '.join(lvals)
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220 lvals = indent + '<small><font color="#909090">%s'\
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221 '</font></small><br>' % lvals
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222 else:
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223 lvals = ''
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224
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225 excerpt = []
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226 i = lnum - index
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227 for line in lines:
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228 number = '&nbsp;' * (5-len(str(i))) + str(i)
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229 number = '<small><font color="#909090">%s</font></small>' % number
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230 line = '<tt>%s&nbsp;%s</tt>' % (number, pydoc.html.preformat(line))
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231 if i == lnum:
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232 line = '''
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233 <table width="100%%" bgcolor="white" cellspacing=0 cellpadding=0 border=0>
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234 <tr><td>%s</td></tr></table>''' % line
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235 excerpt.append('\n' + line)
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236 if i == lnum:
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237 excerpt.append(lvals)
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238 i = i + 1
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239 traceback.append('<p>' + level + '\n'.join(excerpt))
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240
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241 traceback.reverse()
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242
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243 exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
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244 attribs = []
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245 for name in dir(evalue):
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246 value = pydoc.html.repr(getattr(evalue, name))
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247 attribs.append('<br>%s%s&nbsp;= %s' % (indent, name, value))
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248
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249 return head + ' '.join(attribs) + ' '.join(traceback) + '<p>&nbsp;</p>'
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250
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251
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252 def handler():
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253 print(breaker())
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254 print(html())
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255
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256 # vim: set filetype=python ts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/