    """
    cgitb.py
      By Ka-Ping Yee <ping@lfw.org> http://web.lfw.org/python/
      Modified for Webware by Ian Bicking <ianb@colorstudy.com>
    """

    import sys, os, types, string, keyword, linecache, tokenize
    # We include a copy of pydoc but since it's in the Python 2.1
    # standard library, we'll try to import it there first.
    try:
        import pydoc
    except ImportError:
        from MiscUtils import pydoc
    # But we need to use a fixed version of inspect, so we won't use the one that comes with Python 2.1.
    from MiscUtils import inspect

    DefaultOptions = {
        'table.bgcolor':        '#F0F0F0',
        'default.fgcolor':      '#000000',
        'row.location.fgcolor': '#0000AA',
        'row.code.fgcolor':     '#FF0000',
        'header.fgcolor':       '#ffffff',
        'header.bgcolor':       '#a00000',
        'subheader.fgcolor':    '#000000',
        'subheader.bgcolor':    '#ccccff',
        'code.accent.bgcolor':  '#ddeeff',
        'code.unaccent.fgcolor':'#909090',
    }

    def breaker():
        return ('<body bgcolor="#f0f0ff">' +
                '<font color="#f0f0ff" size="-5"> > </font> ' +
                '</table>' * 5)

    def html(context=5, options = None):
        if options:
            opt = DefaultOptions.copy()
            opt.update(options)
        else:
            opt = DefaultOptions

        etype, evalue = sys.exc_info()[:2]
        if type(etype) is types.ClassType:
            etype = etype.__name__
        inspect_trace = inspect.trace(context)
        inspect_trace.reverse()

        pyver = 'Python ' + string.split(sys.version)[0] + '<br>' + sys.executable
        javascript = """
        <script language="JavaScript"><!--
        function popup_repr(title, value) {
            var w = window.open('', '_blank',
                            'directories=no,height=200,width=400,location=no,menubar=yes,scrollbars=yes,status=no,toolbar=no');
            w.document.write('<html><head><title>' + title + '</title></head><body bgcolor="#ffffff">');
            w.document.write(value);
            w.document.write('<form><input type="button" onClick="window.close()" value="close window"></form></body></html>');
        }
        // --></script>"""

        traceback_summary = []
        for frame, file, lnum, func, lines, index in inspect_trace:
            traceback_summary.append('<a href="#%s%i"><font color="%s">%s</font></a><font color="%s">:<tt style="font-family: Courier, sans-serif">%s</tt></font>' %
                                     (string.replace(file, "/", "_"),
                                      lnum,
                                      opt["header.fgcolor"],
                                      os.path.splitext(os.path.basename(file))[0],
                                      opt["header.fgcolor"],
                                      string.replace("%5i" % lnum, " ", " ")))
        head = '<table bgcolor="%s" cellspacing=0 border=0><tr><td valign=top align=left><font color="%s"><big><big><strong>%s</strong></big></big>: %s</font></td><td rowspan=2 valign=top align=right>%s</td></tr>' % \
            (opt['header.bgcolor'], opt['header.fgcolor'], str(etype),
             pydoc.html.escape(str(evalue)),
             string.join(traceback_summary, "<br>\n"))

        head = head + '<tr><td valign=top bgcolor="#ffffff"><br>\n'
        head = head + ('<p>A problem occurred while running a Python script. '
                       'Here is the sequence of function calls leading up to '
                       'the error, with the most recent (innermost) call first.')
        head = head + '</td></tr></table>\n'

        indent = '<tt><small>%s</small> </tt>' % (' ' * 5)
        traceback = []
        for frame, file, lnum, func, lines, index in inspect_trace:
            if not file: file = "not found"
            file = os.path.abspath(file)
            try:
                file_list = string.split(file, "/")
                display_file = string.join(file_list[file_list.index("Webware") + 1:], "/")
            except ValueError:
                display_file = file
            if display_file[-3:] == ".py":
                display_file = display_file[:-3]
            link = '<a name="%s%i"></a><a href="file:%s">%s</a>' % (string.replace(file, "/", "_"), lnum, file, pydoc.html.escape(display_file))
            args, varargs, varkw, locals = inspect.getargvalues(frame)
            if func == '?':
                call = ''
            else:
                call = 'in <strong>%s</strong>' % func + inspect.formatargvalues(
                        args, varargs, varkw, locals,
                        formatvalue=lambda value: '=' + html_repr(value))

            names = []
            dotted = [0, []]
            def tokeneater(type, token, start, end, line, names=names, dotted=dotted):
                if type == tokenize.OP and token == ".":
                    dotted[0] = 1
                if type == tokenize.NAME and token not in keyword.kwlist:
                    if dotted[0]:
                        dotted[0] = 0
                        dotted[1].append(token)
                        if token not in names:
                            names.append(dotted[1][:])
                    elif token not in names:
                        if token != "self": names.append(token)
                        dotted[1] = [token]
                if type == tokenize.NEWLINE: raise IndexError
            def linereader(file=file, lnum=[lnum]):
                line = linecache.getline(file, lnum[0])
                lnum[0] = lnum[0] + 1
                return line

            try:
                tokenize.tokenize(linereader, tokeneater)
            except IndexError: pass
            lvals = []
            for name in names:
                if type(name) is type([]):
                    if locals.has_key(name[0]) or frame.f_globals.has_key(name[0]):
                        name_list, name = name, name[0]
                        if locals.has_key(name_list[0]):
                            value = locals[name_list[0]]
                        else:
                            value = frame.f_globals[name_list[0]]
                            name = "<em>global</em> %s" % name
                        for subname in name_list[1:]:
                            if hasattr(value, subname):
                                value = getattr(value, subname)
                                name = name + "." + subname
                            else:
                                name = name + "." + "(unknown: %s)" % subname
                                break
                        name = '<strong>%s</strong>' % name
                        if type(value) is types.MethodType and 1:
                            value = None
                        else:
                            value = html_repr(value)
                elif name in frame.f_code.co_varnames:
                    if locals.has_key(name):
                        value = html_repr(locals[name])
                    else:
                        value = '<em>undefined</em>'
                    name = '<strong>%s</strong>' % name
                else:
                    if frame.f_globals.has_key(name):
                        value = html_repr(frame.f_globals[name])
                    else:
                        value = '<em>undefined</em>'
                    name = '<em>global</em> <strong>%s</strong>' % name
                if value is not None:
                    lvals.append('%s = %s' % (name, value))
            if lvals:
                lvals = string.join(lvals, ', ')
                lvals = indent + '''
    <small><font color="%s">%s</font></small><br>''' % (opt['code.unaccent.fgcolor'], lvals)
            else:
                lvals = ''

            level = '''
    <table width="100%%" bgcolor="%s" cellspacing=0 cellpadding=2 border=0>
    <tr><td><font color="%s">%s %s</font></td></tr></table>''' % (opt['subheader.bgcolor'], opt['subheader.fgcolor'], link, call)
            excerpt = []
            try:
                i = lnum - index
            except TypeError:
                i = lnum
            lines = lines or ['file not found']
            for line in lines:
                number = ' ' * (5-len(str(i))) + str(i)
                number = '<small><font color="%s">%s</font></small>' % (opt['code.unaccent.fgcolor'], number)
                line = '<tt>%s %s</tt>' % (number, pydoc.html.preformat(line))
                if i == lnum:
                    line = '''
    <table width="100%%" bgcolor="%s" cellspacing=0 cellpadding=0 border=0>
    <tr><td>%s</td></tr></table>''' % (opt['code.accent.bgcolor'], line)
                excerpt.append('\n' + line)
                if i == lnum:
                    excerpt.append(lvals)
                i = i + 1
            traceback.append('<p>' + level + string.join(excerpt, '\n'))

        exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
        attribs = []
        if type(evalue) is types.InstanceType:
            for name in dir(evalue):
                value = html_repr(getattr(evalue, name))
                attribs.append('<br>%s%s = %s' % (indent, name, value))

        return javascript + head + string.join(traceback) + exception + string.join(attribs)

    def handler():
        print breaker()
        print html()

    def html_repr(value):
        html_repr_instance = pydoc.html._repr_instance
        enc_value = pydoc.html.repr(value)
        if len(enc_value) > html_repr_instance.maxstring:
            plain_value = pydoc.html.escape(repr(value))
            return '%s <a href="#" onClick="popup_repr(\'Long repr\', \'Full representation:<br>\\n%s\'); return false">(complete)</a>' \
                   % (enc_value, string.replace(string.replace(pydoc.html.escape(plain_value), "'", "\\'"), '"', '"'))
        else:
            return enc_value

    if __name__ == '__main__':
        try: import tester
        except: handler()