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annotate roundup/cgi/cgitb.py @ 5418:55f09ca366c4

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Python 3 preparation: StringIO. This generally arranges for StringIO and cStringIO references to use io.StringIO for Python 3 but io.BytesIO for Python 2, consistent with the string representations generally used in Roundup. A special FasterStringIO in the TAL code, which referenced internals of the old Python 2 StringIO module, is cut down so it doesn't actually do anything beyond the StringIO class it inherits from (it would also be reasonable to remove FasterStringIO completely). One place in roundup_server.py clearly needing binary I/O is made to use io.BytesIO unconditionally.
author Joseph Myers <jsm@polyomino.org.uk>
date Wed, 25 Jul 2018 09:08:29 +0000
parents 64b05e24dbd8
children 7172c201dec2
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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 sys, os, types, string, keyword, linecache, tokenize, inspect, cgi
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11 import pydoc, traceback
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12
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13 from roundup.cgi import templating, TranslationService
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14
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15 def get_translator(i18n=None):
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16 """Return message translation function (gettext)
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17
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18 Parameters:
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19 i18n - translation service, such as roundup.i18n module
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20 or TranslationService object.
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21
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22 Return ``gettext`` attribute of the ``i18n`` object, if available
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23 (must be a message translation function with one argument).
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24 If ``gettext`` cannot be obtained from ``i18n``, take default
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25 TranslationService.
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26
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27 """
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28 try:
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29 return i18n.gettext
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30 except:
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31 return TranslationService.get_translation().gettext
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32
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33 def breaker():
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34 return ('<body bgcolor="white">' +
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35 '<font color="white" size="-5"> > </font> ' +
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36 '</table>' * 5)
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37
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38 def niceDict(indent, dict):
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39 l = []
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40 for k in sorted(dict):
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41 v = dict[k]
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42 l.append('<tr><td><strong>%s</strong></td><td>%s</td></tr>'%(k,
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43 cgi.escape(repr(v))))
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44 return '\n'.join(l)
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45
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46 def pt_html(context=5, i18n=None):
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47 _ = get_translator(i18n)
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48 esc = cgi.escape
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49 exc_info = [esc(str(value)) for value in sys.exc_info()[:2]]
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50 l = [_('<h1>Templating Error</h1>\n'
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51 '<p><b>%(exc_type)s</b>: %(exc_value)s</p>\n'
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52 '<p class="help">Debugging information follows</p>'
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53 ) % {'exc_type': exc_info[0], 'exc_value': exc_info[1]},
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54 '<ol>',]
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55 from roundup.cgi.PageTemplates.Expressions import TraversalError
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56 t = inspect.trace(context)
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57 t.reverse()
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58 for frame, file, lnum, func, lines, index in t:
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59 args, varargs, varkw, locals = inspect.getargvalues(frame)
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60 if '__traceback_info__' in locals:
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61 ti = locals['__traceback_info__']
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62 if isinstance(ti, TraversalError):
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63 s = []
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64 for name, info in ti.path:
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65 s.append(_('<li>"%(name)s" (%(info)s)</li>')
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66 % {'name': name, 'info': esc(repr(info))})
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67 s = '\n'.join(s)
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68 l.append(_('<li>Looking for "%(name)s", '
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69 'current path:<ol>%(path)s</ol></li>'
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70 ) % {'name': ti.name, 'path': s})
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71 else:
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72 l.append(_('<li>In %s</li>') % esc(str(ti)))
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73 if '__traceback_supplement__' in locals:
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74 ts = locals['__traceback_supplement__']
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75 if len(ts) == 2:
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76 supp, context = ts
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77 s = _('A problem occurred in your template "%s".') \
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78 % str(context.id)
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79 if context._v_errors:
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80 s = s + '<br>' + '<br>'.join(
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81 [esc(x) for x in context._v_errors])
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82 l.append('<li>%s</li>'%s)
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83 elif len(ts) == 3:
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84 supp, context, info = ts
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85 l.append(_('''
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86 <li>While evaluating the %(info)r expression on line %(line)d
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87 <table class="otherinfo" style="font-size: 90%%">
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88 <tr><th colspan="2" class="header">Current variables:</th></tr>
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89 %(globals)s
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90 %(locals)s
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91 </table></li>
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92 ''') % {
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93 'info': info,
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94 'line': context.position[0],
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95 'globals': niceDict(' ', context.global_vars),
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96 'locals': niceDict(' ', context.local_vars)
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97 })
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98
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99 l.append('''
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100 </ol>
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101 <table style="font-size: 80%%; color: gray">
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102 <tr><th class="header" align="left">%s</th></tr>
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103 <tr><td><pre>%s</pre></td></tr>
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104 </table>''' % (_('Full traceback:'), cgi.escape(''.join(
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105 traceback.format_exception(*sys.exc_info())
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106 ))))
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107 l.append('<p>&nbsp;</p>')
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108 return '\n'.join(l)
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109
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110 def html(context=5, i18n=None):
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111 _ = get_translator(i18n)
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112 etype, evalue = sys.exc_info()[0], sys.exc_info()[1]
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113 if type(etype) is type:
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114 etype = etype.__name__
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115 pyver = 'Python ' + string.split(sys.version)[0] + '<br>' + sys.executable
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116 head = pydoc.html.heading(
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117 _('<font size=+1><strong>%(exc_type)s</strong>: %(exc_value)s</font>')
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118 % {'exc_type': etype, 'exc_value': evalue},
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119 '#ffffff', '#777777', pyver)
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120
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121 head = head + (_('<p>A problem occurred while running a Python script. '
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122 'Here is the sequence of function calls leading up to '
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123 'the error, with the most recent (innermost) call first. '
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124 'The exception attributes are:'))
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125
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126 indent = '<tt><small>%s</small>&nbsp;</tt>' % ('&nbsp;' * 5)
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127 traceback = []
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128 for frame, file, lnum, func, lines, index in inspect.trace(context):
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129 if file is None:
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130 link = _("&lt;file is None - probably inside <tt>eval</tt> "
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131 "or <tt>exec</tt>&gt;")
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132 else:
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133 file = os.path.abspath(file)
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134 link = '<a href="file:%s">%s</a>' % (file, pydoc.html.escape(file))
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135 args, varargs, varkw, locals = inspect.getargvalues(frame)
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136 if func == '?':
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137 call = ''
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138 else:
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139 call = _('in <strong>%s</strong>') % func + inspect.formatargvalues(
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140 args, varargs, varkw, locals,
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141 formatvalue=lambda value: '=' + pydoc.html.repr(value))
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142
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143 level = '''
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144 <table width="100%%" bgcolor="#dddddd" cellspacing=0 cellpadding=2 border=0>
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145 <tr><td>%s %s</td></tr></table>''' % (link, call)
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146
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147 if index is None or file is None:
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148 traceback.append('<p>' + level)
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149 continue
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150
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151 # do a file inspection
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152 names = []
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153 def tokeneater(type, token, start, end, line, names=names):
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154 if type == tokenize.NAME and token not in keyword.kwlist:
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155 if token not in names:
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156 names.append(token)
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157 if type == tokenize.NEWLINE: raise IndexError
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158 def linereader(file=file, lnum=[lnum]):
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159 line = linecache.getline(file, lnum[0])
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160 lnum[0] = lnum[0] + 1
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161 return line
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162
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163 try:
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164 tokenize.tokenize(linereader, tokeneater)
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165 except IndexError:
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166 pass
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167 lvals = []
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168 for name in names:
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169 if name in frame.f_code.co_varnames:
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170 if name in locals:
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171 value = pydoc.html.repr(locals[name])
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172 else:
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173 value = _('<em>undefined</em>')
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174 name = '<strong>%s</strong>' % name
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175 else:
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176 if name in frame.f_globals:
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177 value = pydoc.html.repr(frame.f_globals[name])
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178 else:
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179 value = _('<em>undefined</em>')
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180 name = '<em>global</em> <strong>%s</strong>' % name
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181 lvals.append('%s&nbsp;= %s'%(name, value))
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182 if lvals:
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183 lvals = string.join(lvals, ', ')
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184 lvals = indent + '<small><font color="#909090">%s'\
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185 '</font></small><br>'%lvals
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186 else:
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187 lvals = ''
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188
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189 excerpt = []
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190 i = lnum - index
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191 for line in lines:
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192 number = '&nbsp;' * (5-len(str(i))) + str(i)
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193 number = '<small><font color="#909090">%s</font></small>' % number
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194 line = '<tt>%s&nbsp;%s</tt>' % (number, pydoc.html.preformat(line))
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195 if i == lnum:
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196 line = '''
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197 <table width="100%%" bgcolor="white" cellspacing=0 cellpadding=0 border=0>
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198 <tr><td>%s</td></tr></table>''' % line
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199 excerpt.append('\n' + line)
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200 if i == lnum:
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201 excerpt.append(lvals)
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202 i = i + 1
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203 traceback.append('<p>' + level + string.join(excerpt, '\n'))
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204
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205 traceback.reverse()
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206
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207 exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
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208 attribs = []
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209 if type(evalue) is types.InstanceType:
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210 for name in dir(evalue):
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211 value = pydoc.html.repr(getattr(evalue, name))
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212 attribs.append('<br>%s%s&nbsp;= %s' % (indent, name, value))
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213
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214 return head + string.join(attribs) + string.join(traceback) + '<p>&nbsp;</p>'
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215
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216 def handler():
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217 print(breaker())
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218 print(html())
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219
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220 # vim: set filetype=python ts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/