debug.py :  » Web-Frameworks » Django » django » views » Python Open Source

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Python Open Source » Web Frameworks » Django 
Django » django » views » debug.py
import datetime
import os
import re
import sys

from django.conf import settings
from django.http import HttpResponse,HttpResponseServerError,HttpResponseNotFound
from django.template import (Template,Context,TemplateDoesNotExist
    TemplateSyntaxError)
from django.utils.html import escape
from django.utils.importlib import import_module
from django.utils.encoding import smart_unicode,smart_str


HIDDEN_SETTINGS = re.compile('SECRET|PASSWORD|PROFANITIES_LIST')

def linebreak_iter(template_source):
    yield 0
    p = template_source.find('\n')
    while p >= 0:
        yield p+1
        p = template_source.find('\n', p+1)
    yield len(template_source) + 1

def cleanse_setting(key, value):
    """Cleanse an individual setting key/value of sensitive content.

    If the value is a dictionary, recursively cleanse the keys in
    that dictionary.
    """
    try:
        if HIDDEN_SETTINGS.search(key):
            cleansed = '********************'
        else:
            if isinstance(value, dict):
                cleansed = dict((k, cleanse_setting(k, v)) for k,v in value.items())
            else:
                cleansed = value
    except TypeError:
        # If the key isn't regex-able, just return as-is.
        cleansed = value
    return cleansed

def get_safe_settings():
    "Returns a dictionary of the settings module, with sensitive settings blurred out."
    settings_dict = {}
    for k in dir(settings):
        if k.isupper():
            settings_dict[k] = cleanse_setting(k, getattr(settings, k))
    return settings_dict

def technical_500_response(request, exc_type, exc_value, tb):
    """
    Create a technical server error response. The last three arguments are
    the values returned from sys.exc_info() and friends.
    """
    reporter = ExceptionReporter(request, exc_type, exc_value, tb)
    html = reporter.get_traceback_html()
    return HttpResponseServerError(html, mimetype='text/html')

class ExceptionReporter:
    """
    A class to organize and coordinate reporting on exceptions.
    """
    def __init__(self, request, exc_type, exc_value, tb):
        self.request = request
        self.exc_type = exc_type
        self.exc_value = exc_value
        self.tb = tb

        self.template_info = None
        self.template_does_not_exist = False
        self.loader_debug_info = None

        # Handle deprecated string exceptions
        if isinstance(self.exc_type, basestring):
            self.exc_value = Exception('Deprecated String Exception: %r' % self.exc_type)
            self.exc_type = type(self.exc_value)

    def get_traceback_html(self):
        "Return HTML code for traceback."

        if issubclass(self.exc_type, TemplateDoesNotExist):
            from django.template.loader import template_source_loaders
            self.template_does_not_exist = True
            self.loader_debug_info = []
            for loader in template_source_loaders:
                try:
                    module = import_module(loader.__module__)
                    source_list_func = module.get_template_sources
                    # NOTE: This assumes exc_value is the name of the template that
                    # the loader attempted to load.
                    template_list = [{'name': t, 'exists': os.path.exists(t)} \
                        for t in source_list_func(str(self.exc_value))]
                except (ImportError, AttributeError):
                    template_list = []
                if hasattr(loader, '__class__'):
                    loader_name = loader.__module__ + '.' + loader.__class__.__name__
                else:
                    loader_name = loader.__module__ + '.' + loader.__name__
                self.loader_debug_info.append({
                    'loader': loader_name,
                    'templates': template_list,
                })
        if (settings.TEMPLATE_DEBUG and hasattr(self.exc_value, 'source') and
            isinstance(self.exc_value, TemplateSyntaxError)):
            self.get_template_exception_info()

        frames = self.get_traceback_frames()

        unicode_hint = ''
        if issubclass(self.exc_type, UnicodeError):
            start = getattr(self.exc_value, 'start', None)
            end = getattr(self.exc_value, 'end', None)
            if start is not None and end is not None:
                unicode_str = self.exc_value.args[1]
                unicode_hint = smart_unicode(unicode_str[max(start-5, 0):min(end+5, len(unicode_str))], 'ascii', errors='replace')
        from django import get_version
        t = Template(TECHNICAL_500_TEMPLATE, name='Technical 500 template')
        c = Context({
            'exception_type': self.exc_type.__name__,
            'exception_value': smart_unicode(self.exc_value, errors='replace'),
            'unicode_hint': unicode_hint,
            'frames': frames,
            'lastframe': frames[-1],
            'request': self.request,
            'settings': get_safe_settings(),
            'sys_executable': sys.executable,
            'sys_version_info': '%d.%d.%d' % sys.version_info[0:3],
            'server_time': datetime.datetime.now(),
            'django_version_info': get_version(),
            'sys_path' : sys.path,
            'template_info': self.template_info,
            'template_does_not_exist': self.template_does_not_exist,
            'loader_debug_info': self.loader_debug_info,
        })
        return t.render(c)

    def get_template_exception_info(self):
        origin, (start, end) = self.exc_value.source
        template_source = origin.reload()
        context_lines = 10
        line = 0
        upto = 0
        source_lines = []
        before = during = after = ""
        for num, next in enumerate(linebreak_iter(template_source)):
            if start >= upto and end <= next:
                line = num
                before = escape(template_source[upto:start])
                during = escape(template_source[start:end])
                after = escape(template_source[end:next])
            source_lines.append( (num, escape(template_source[upto:next])) )
            upto = next
        total = len(source_lines)

        top = max(1, line - context_lines)
        bottom = min(total, line + 1 + context_lines)

        self.template_info = {
            'message': self.exc_value.args[0],
            'source_lines': source_lines[top:bottom],
            'before': before,
            'during': during,
            'after': after,
            'top': top,
            'bottom': bottom,
            'total': total,
            'line': line,
            'name': origin.name,
        }

    def _get_lines_from_file(self, filename, lineno, context_lines, loader=None, module_name=None):
        """
        Returns context_lines before and after lineno from file.
        Returns (pre_context_lineno, pre_context, context_line, post_context).
        """
        source = None
        if loader is not None and hasattr(loader, "get_source"):
            source = loader.get_source(module_name)
            if source is not None:
                source = source.splitlines()
        if source is None:
            try:
                f = open(filename)
                try:
                    source = f.readlines()
                finally:
                    f.close()
            except (OSError, IOError):
                pass
        if source is None:
            return None, [], None, []

        encoding = 'ascii'
        for line in source[:2]:
            # File coding may be specified. Match pattern from PEP-263
            # (http://www.python.org/dev/peps/pep-0263/)
            match = re.search(r'coding[:=]\s*([-\w.]+)', line)
            if match:
                encoding = match.group(1)
                break
        source = [unicode(sline, encoding, 'replace') for sline in source]

        lower_bound = max(0, lineno - context_lines)
        upper_bound = lineno + context_lines

        pre_context = [line.strip('\n') for line in source[lower_bound:lineno]]
        context_line = source[lineno].strip('\n')
        post_context = [line.strip('\n') for line in source[lineno+1:upper_bound]]

        return lower_bound, pre_context, context_line, post_context

    def get_traceback_frames(self):
        frames = []
        tb = self.tb
        while tb is not None:
            # support for __traceback_hide__ which is used by a few libraries
            # to hide internal frames.
            if tb.tb_frame.f_locals.get('__traceback_hide__'):
                tb = tb.tb_next
                continue
            filename = tb.tb_frame.f_code.co_filename
            function = tb.tb_frame.f_code.co_name
            lineno = tb.tb_lineno - 1
            loader = tb.tb_frame.f_globals.get('__loader__')
            module_name = tb.tb_frame.f_globals.get('__name__')
            pre_context_lineno, pre_context, context_line, post_context = self._get_lines_from_file(filename, lineno, 7, loader, module_name)
            if pre_context_lineno is not None:
                frames.append({
                    'tb': tb,
                    'filename': filename,
                    'function': function,
                    'lineno': lineno + 1,
                    'vars': tb.tb_frame.f_locals.items(),
                    'id': id(tb),
                    'pre_context': pre_context,
                    'context_line': context_line,
                    'post_context': post_context,
                    'pre_context_lineno': pre_context_lineno + 1,
                })
            tb = tb.tb_next

        if not frames:
            frames = [{
                'filename': '&lt;unknown&gt;',
                'function': '?',
                'lineno': '?',
                'context_line': '???',
            }]

        return frames

    def format_exception(self):
        """
        Return the same data as from traceback.format_exception.
        """
        import traceback
        frames = self.get_traceback_frames()
        tb = [ (f['filename'], f['lineno'], f['function'], f['context_line']) for f in frames ]
        list = ['Traceback (most recent call last):\n']
        list += traceback.format_list(tb)
        list += traceback.format_exception_only(self.exc_type, self.exc_value)
        return list


def technical_404_response(request, exception):
    "Create a technical 404 error response. The exception should be the Http404."
    try:
        tried = exception.args[0]['tried']
    except (IndexError, TypeError, KeyError):
        tried = []
    else:
        if not tried:
            # tried exists but is an empty list. The URLconf must've been empty.
            return empty_urlconf(request)

    t = Template(TECHNICAL_404_TEMPLATE, name='Technical 404 template')
    c = Context({
        'root_urlconf': settings.ROOT_URLCONF,
        'request_path': request.path_info[1:], # Trim leading slash
        'urlpatterns': tried,
        'reason': smart_str(exception, errors='replace'),
        'request': request,
        'settings': get_safe_settings(),
    })
    return HttpResponseNotFound(t.render(c), mimetype='text/html')

def empty_urlconf(request):
    "Create an empty URLconf 404 error response."
    t = Template(EMPTY_URLCONF_TEMPLATE, name='Empty URLConf template')
    c = Context({
        'project_name': settings.SETTINGS_MODULE.split('.')[0]
    })
    return HttpResponse(t.render(c), mimetype='text/html')

#
# Templates are embedded in the file so that we know the error handler will
# always work even if the template loader is broken.
#

TECHNICAL_500_TEMPLATE = """
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <meta name="robots" content="NONE,NOARCHIVE">
  <title>{{ exception_type }} at {{ request.path_info|escape }}</title>
  <style type="text/css">
    html * { padding:0; margin:0; }
    body * { padding:10px 20px; }
    body * * { padding:0; }
    body { font:small sans-serif; }
    body>div { border-bottom:1px solid #ddd; }
    h1 { font-weight:normal; }
    h2 { margin-bottom:.8em; }
    h2 span { font-size:80%; color:#666; font-weight:normal; }
    h3 { margin:1em 0 .5em 0; }
    h4 { margin:0 0 .5em 0; font-weight: normal; }
    table { border:1px solid #ccc; border-collapse: collapse; width:100%; background:white; }
    tbody td, tbody th { vertical-align:top; padding:2px 3px; }
    thead th { padding:1px 6px 1px 3px; background:#fefefe; text-align:left; font-weight:normal; font-size:11px; border:1px solid #ddd; }
    tbody th { width:12em; text-align:right; color:#666; padding-right:.5em; }
    table.vars { margin:5px 0 2px 40px; }
    table.vars td, table.req td { font-family:monospace; }
    table td.code { width:100%; }
    table td.code div { overflow:hidden; }
    table.source th { color:#666; }
    table.source td { font-family:monospace; white-space:pre; border-bottom:1px solid #eee; }
    ul.traceback { list-style-type:none; }
    ul.traceback li.frame { margin-bottom:1em; }
    div.context { margin: 10px 0; }
    div.context ol { padding-left:30px; margin:0 10px; list-style-position: inside; }
    div.context ol li { font-family:monospace; white-space:pre; color:#666; cursor:pointer; }
    div.context ol.context-line li { color:black; background-color:#ccc; }
    div.context ol.context-line li span { float: right; }
    div.commands { margin-left: 40px; }
    div.commands a { color:black; text-decoration:none; }
    #summary { background: #ffc; }
    #summary h2 { font-weight: normal; color: #666; }
    #explanation { background:#eee; }
    #template, #template-not-exist { background:#f6f6f6; }
    #template-not-exist ul { margin: 0 0 0 20px; }
    #unicode-hint { background:#eee; }
    #traceback { background:#eee; }
    #requestinfo { background:#f6f6f6; padding-left:120px; }
    #summary table { border:none; background:transparent; }
    #requestinfo h2, #requestinfo h3 { position:relative; margin-left:-100px; }
    #requestinfo h3 { margin-bottom:-1em; }
    .error { background: #ffc; }
    .specific { color:#cc3300; font-weight:bold; }
    h2 span.commands { font-size:.7em;}
    span.commands a:link {color:#5E5694;}
    pre.exception_value { font-family: sans-serif; color: #666; font-size: 1.5em; margin: 10px 0 10px 0; }
  </style>
  <script type="text/javascript">
  //<!--
    function getElementsByClassName(oElm, strTagName, strClassName){
        // Written by Jonathan Snook, http://www.snook.ca/jon; Add-ons by Robert Nyman, http://www.robertnyman.com
        var arrElements = (strTagName == "*" && document.all)? document.all :
        oElm.getElementsByTagName(strTagName);
        var arrReturnElements = new Array();
        strClassName = strClassName.replace(/\-/g, "\\-");
        var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
        var oElement;
        for(var i=0; i<arrElements.length; i++){
            oElement = arrElements[i];
            if(oRegExp.test(oElement.className)){
                arrReturnElements.push(oElement);
            }
        }
        return (arrReturnElements)
    }
    function hideAll(elems) {
      for (var e = 0; e < elems.length; e++) {
        elems[e].style.display = 'none';
      }
    }
    window.onload = function() {
      hideAll(getElementsByClassName(document, 'table', 'vars'));
      hideAll(getElementsByClassName(document, 'ol', 'pre-context'));
      hideAll(getElementsByClassName(document, 'ol', 'post-context'));
      hideAll(getElementsByClassName(document, 'div', 'pastebin'));
    }
    function toggle() {
      for (var i = 0; i < arguments.length; i++) {
        var e = document.getElementById(arguments[i]);
        if (e) {
          e.style.display = e.style.display == 'none' ? 'block' : 'none';
        }
      }
      return false;
    }
    function varToggle(link, id) {
      toggle('v' + id);
      var s = link.getElementsByTagName('span')[0];
      var uarr = String.fromCharCode(0x25b6);
      var darr = String.fromCharCode(0x25bc);
      s.innerHTML = s.innerHTML == uarr ? darr : uarr;
      return false;
    }
    function switchPastebinFriendly(link) {
      s1 = "Switch to copy-and-paste view";
      s2 = "Switch back to interactive view";
      link.innerHTML = link.innerHTML == s1 ? s2 : s1;
      toggle('browserTraceback', 'pastebinTraceback');
      return false;
    }
    //-->
  </script>
</head>
<body>
<div id="summary">
  <h1>{{ exception_type }} at {{ request.path_info|escape }}</h1>
  <pre class="exception_value">{{ exception_value|escape }}</pre>
  <table class="meta">
    <tr>
      <th>Request Method:</th>
      <td>{{ request.META.REQUEST_METHOD }}</td>
    </tr>
    <tr>
      <th>Request URL:</th>
      <td>{{ request.build_absolute_uri|escape }}</td>
    </tr>
    <tr>
      <th>Django Version:</th>
      <td>{{ django_version_info }}</td>
    </tr>
    <tr>
      <th>Exception Type:</th>
      <td>{{ exception_type }}</td>
    </tr>
    <tr>
      <th>Exception Value:</th>
      <td><pre>{{ exception_value|escape }}</pre></td>
    </tr>
    <tr>
      <th>Exception Location:</th>
      <td>{{ lastframe.filename|escape }} in {{ lastframe.function|escape }}, line {{ lastframe.lineno }}</td>
    </tr>
    <tr>
      <th>Python Executable:</th>
      <td>{{ sys_executable|escape }}</td>
    </tr>
    <tr>
      <th>Python Version:</th>
      <td>{{ sys_version_info }}</td>
    </tr>
    <tr>
      <th>Python Path:</th>
      <td>{{ sys_path }}</td>
    </tr>
    <tr>
      <th>Server time:</th>
      <td>{{server_time|date:"r"}}</td>
    </tr>
  </table>
</div>
{% if unicode_hint %}
<div id="unicode-hint">
    <h2>Unicode error hint</h2>
    <p>The string that could not be encoded/decoded was: <strong>{{ unicode_hint|escape }}</strong></p>
</div>
{% endif %}
{% if template_does_not_exist %}
<div id="template-not-exist">
    <h2>Template-loader postmortem</h2>
    {% if loader_debug_info %}
        <p>Django tried loading these templates, in this order:</p>
        <ul>
        {% for loader in loader_debug_info %}
            <li>Using loader <code>{{ loader.loader }}</code>:
                <ul>{% for t in loader.templates %}<li><code>{{ t.name }}</code> (File {% if t.exists %}exists{% else %}does not exist{% endif %})</li>{% endfor %}</ul>
            </li>
        {% endfor %}
        </ul>
    {% else %}
        <p>Django couldn't find any templates because your <code>TEMPLATE_LOADERS</code> setting is empty!</p>
    {% endif %}
</div>
{% endif %}
{% if template_info %}
<div id="template">
   <h2>Template error</h2>
   <p>In template <code>{{ template_info.name }}</code>, error at line <strong>{{ template_info.line }}</strong></p>
   <h3>{{ template_info.message }}</h3>
   <table class="source{% if template_info.top %} cut-top{% endif %}{% ifnotequal template_info.bottom template_info.total %} cut-bottom{% endifnotequal %}">
   {% for source_line in template_info.source_lines %}
   {% ifequal source_line.0 template_info.line %}
       <tr class="error"><th>{{ source_line.0 }}</th>
       <td>{{ template_info.before }}<span class="specific">{{ template_info.during }}</span>{{ template_info.after }}</td></tr>
   {% else %}
      <tr><th>{{ source_line.0 }}</th>
      <td>{{ source_line.1 }}</td></tr>
   {% endifequal %}
   {% endfor %}
   </table>
</div>
{% endif %}
<div id="traceback">
  <h2>Traceback <span class="commands"><a href="#" onclick="return switchPastebinFriendly(this);">Switch to copy-and-paste view</a></span></h2>
  {% autoescape off %}
  <div id="browserTraceback">
    <ul class="traceback">
      {% for frame in frames %}
        <li class="frame">
          <code>{{ frame.filename|escape }}</code> in <code>{{ frame.function|escape }}</code>

          {% if frame.context_line %}
            <div class="context" id="c{{ frame.id }}">
              {% if frame.pre_context %}
                <ol start="{{ frame.pre_context_lineno }}" class="pre-context" id="pre{{ frame.id }}">{% for line in frame.pre_context %}<li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')">{{ line|escape }}</li>{% endfor %}</ol>
              {% endif %}
              <ol start="{{ frame.lineno }}" class="context-line"><li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')">{{ frame.context_line|escape }} <span>...</span></li></ol>
              {% if frame.post_context %}
                <ol start='{{ frame.lineno|add:"1" }}' class="post-context" id="post{{ frame.id }}">{% for line in frame.post_context %}<li onclick="toggle('pre{{ frame.id }}', 'post{{ frame.id }}')">{{ line|escape }}</li>{% endfor %}</ol>
              {% endif %}
            </div>
          {% endif %}

          {% if frame.vars %}
            <div class="commands">
                <a href="#" onclick="return varToggle(this, '{{ frame.id }}')"><span>&#x25b6;</span> Local vars</a>
            </div>
            <table class="vars" id="v{{ frame.id }}">
              <thead>
                <tr>
                  <th>Variable</th>
                  <th>Value</th>
                </tr>
              </thead>
              <tbody>
                {% for var in frame.vars|dictsort:"0" %}
                  <tr>
                    <td>{{ var.0|escape }}</td>
                    <td class="code"><div>{{ var.1|pprint|escape }}</div></td>
                  </tr>
                {% endfor %}
              </tbody>
            </table>
          {% endif %}
        </li>
      {% endfor %}
    </ul>
  </div>
  {% endautoescape %}
  <form action="http://dpaste.com/" name="pasteform" id="pasteform" method="post">
  <div id="pastebinTraceback" class="pastebin">
    <input type="hidden" name="language" value="PythonConsole">
    <input type="hidden" name="title" value="{{ exception_type|escape }} at {{ request.path_info|escape }}">
    <input type="hidden" name="source" value="Django Dpaste Agent">
    <input type="hidden" name="poster" value="Django">
    <textarea name="content" id="traceback_area" cols="140" rows="25">
Environment:

Request Method: {{ request.META.REQUEST_METHOD }}
Request URL: {{ request.build_absolute_uri|escape }}
Django Version: {{ django_version_info }}
Python Version: {{ sys_version_info }}
Installed Applications:
{{ settings.INSTALLED_APPS|pprint }}
Installed Middleware:
{{ settings.MIDDLEWARE_CLASSES|pprint }}

{% if template_does_not_exist %}Template Loader Error:
{% if loader_debug_info %}Django tried loading these templates, in this order:
{% for loader in loader_debug_info %}Using loader {{ loader.loader }}:
{% for t in loader.templates %}{{ t.name }} (File {% if t.exists %}exists{% else %}does not exist{% endif %})
{% endfor %}{% endfor %}
{% else %}Django couldn't find any templates because your TEMPLATE_LOADERS setting is empty!
{% endif %}
{% endif %}{% if template_info %}
Template error:
In template {{ template_info.name }}, error at line {{ template_info.line }}
   {{ template_info.message }}{% for source_line in template_info.source_lines %}{% ifequal source_line.0 template_info.line %}
   {{ source_line.0 }} : {{ template_info.before }} {{ template_info.during }} {{ template_info.after }}
{% else %}
   {{ source_line.0 }} : {{ source_line.1 }}
{% endifequal %}{% endfor %}{% endif %}
Traceback:
{% for frame in frames %}File "{{ frame.filename|escape }}" in {{ frame.function|escape }}
{% if frame.context_line %}  {{ frame.lineno }}. {{ frame.context_line|escape }}{% endif %}
{% endfor %}
Exception Type: {{ exception_type|escape }} at {{ request.path_info|escape }}
Exception Value: {{ exception_value|escape }}
</textarea>
  <br><br>
  <input type="submit" value="Share this traceback on a public Web site">
  </div>
</form>
</div>

<div id="requestinfo">
  <h2>Request information</h2>

  <h3 id="get-info">GET</h3>
  {% if request.GET %}
    <table class="req">
      <thead>
        <tr>
          <th>Variable</th>
          <th>Value</th>
        </tr>
      </thead>
      <tbody>
        {% for var in request.GET.items %}
          <tr>
            <td>{{ var.0 }}</td>
            <td class="code"><div>{{ var.1|pprint }}</div></td>
          </tr>
        {% endfor %}
      </tbody>
    </table>
  {% else %}
    <p>No GET data</p>
  {% endif %}

  <h3 id="post-info">POST</h3>
  {% if request.POST %}
    <table class="req">
      <thead>
        <tr>
          <th>Variable</th>
          <th>Value</th>
        </tr>
      </thead>
      <tbody>
        {% for var in request.POST.items %}
          <tr>
            <td>{{ var.0 }}</td>
            <td class="code"><div>{{ var.1|pprint }}</div></td>
          </tr>
        {% endfor %}
      </tbody>
    </table>
  {% else %}
    <p>No POST data</p>
  {% endif %}
  <h3 id="files-info">FILES</h3>
  {% if request.FILES %}
    <table class="req">
        <thead>
            <tr>
                <th>Variable</th>
                <th>Value</th>
            </tr>
        </thead>
        <tbody>
            {% for var in request.FILES.items %}
                <tr>
                    <td>{{ var.0 }}</td>
                    <td class="code"><div>{{ var.1|pprint }}</div></td>
                </tr>
            {% endfor %}
        </tbody>
    </table>
  {% else %}
    <p>No FILES data</p>
  {% endif %}


  <h3 id="cookie-info">COOKIES</h3>
  {% if request.COOKIES %}
    <table class="req">
      <thead>
        <tr>
          <th>Variable</th>
          <th>Value</th>
        </tr>
      </thead>
      <tbody>
        {% for var in request.COOKIES.items %}
          <tr>
            <td>{{ var.0 }}</td>
            <td class="code"><div>{{ var.1|pprint }}</div></td>
          </tr>
        {% endfor %}
      </tbody>
    </table>
  {% else %}
    <p>No cookie data</p>
  {% endif %}

  <h3 id="meta-info">META</h3>
  <table class="req">
    <thead>
      <tr>
        <th>Variable</th>
        <th>Value</th>
      </tr>
    </thead>
    <tbody>
      {% for var in request.META.items|dictsort:"0" %}
        <tr>
          <td>{{ var.0 }}</td>
          <td class="code"><div>{{ var.1|pprint }}</div></td>
        </tr>
      {% endfor %}
    </tbody>
  </table>

  <h3 id="settings-info">Settings</h3>
  <h4>Using settings module <code>{{ settings.SETTINGS_MODULE }}</code></h4>
  <table class="req">
    <thead>
      <tr>
        <th>Setting</th>
        <th>Value</th>
      </tr>
    </thead>
    <tbody>
      {% for var in settings.items|dictsort:"0" %}
        <tr>
          <td>{{ var.0 }}</td>
          <td class="code"><div>{{ var.1|pprint }}</div></td>
        </tr>
      {% endfor %}
    </tbody>
  </table>

</div>

<div id="explanation">
  <p>
    You're seeing this error because you have <code>DEBUG = True</code> in your
    Django settings file. Change that to <code>False</code>, and Django will
    display a standard 500 page.
  </p>
</div>
</body>
</html>
"""

TECHNICAL_404_TEMPLATE = """
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <title>Page not found at {{ request.path_info|escape }}</title>
  <meta name="robots" content="NONE,NOARCHIVE">
  <style type="text/css">
    html * { padding:0; margin:0; }
    body * { padding:10px 20px; }
    body * * { padding:0; }
    body { font:small sans-serif; background:#eee; }
    body>div { border-bottom:1px solid #ddd; }
    h1 { font-weight:normal; margin-bottom:.4em; }
    h1 span { font-size:60%; color:#666; font-weight:normal; }
    table { border:none; border-collapse: collapse; width:100%; }
    td, th { vertical-align:top; padding:2px 3px; }
    th { width:12em; text-align:right; color:#666; padding-right:.5em; }
    #info { background:#f6f6f6; }
    #info ol { margin: 0.5em 4em; }
    #info ol li { font-family: monospace; }
    #summary { background: #ffc; }
    #explanation { background:#eee; border-bottom: 0px none; }
  </style>
</head>
<body>
  <div id="summary">
    <h1>Page not found <span>(404)</span></h1>
    <table class="meta">
      <tr>
        <th>Request Method:</th>
        <td>{{ request.META.REQUEST_METHOD }}</td>
      </tr>
      <tr>
        <th>Request URL:</th>
      <td>{{ request.build_absolute_uri|escape }}</td>
      </tr>
    </table>
  </div>
  <div id="info">
    {% if urlpatterns %}
      <p>
      Using the URLconf defined in <code>{{ settings.ROOT_URLCONF }}</code>,
      Django tried these URL patterns, in this order:
      </p>
      <ol>
        {% for pattern in urlpatterns %}
          <li>{{ pattern }}</li>
        {% endfor %}
      </ol>
      <p>The current URL, <code>{{ request_path|escape }}</code>, didn't match any of these.</p>
    {% else %}
      <p>{{ reason }}</p>
    {% endif %}
  </div>

  <div id="explanation">
    <p>
      You're seeing this error because you have <code>DEBUG = True</code> in
      your Django settings file. Change that to <code>False</code>, and Django
      will display a standard 404 page.
    </p>
  </div>
</body>
</html>
"""

EMPTY_URLCONF_TEMPLATE = """
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en"><head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <meta name="robots" content="NONE,NOARCHIVE"><title>Welcome to Django</title>
  <style type="text/css">
    html * { padding:0; margin:0; }
    body * { padding:10px 20px; }
    body * * { padding:0; }
    body { font:small sans-serif; }
    body>div { border-bottom:1px solid #ddd; }
    h1 { font-weight:normal; }
    h2 { margin-bottom:.8em; }
    h2 span { font-size:80%; color:#666; font-weight:normal; }
    h3 { margin:1em 0 .5em 0; }
    h4 { margin:0 0 .5em 0; font-weight: normal; }
    table { border:1px solid #ccc; border-collapse: collapse; width:100%; background:white; }
    tbody td, tbody th { vertical-align:top; padding:2px 3px; }
    thead th { padding:1px 6px 1px 3px; background:#fefefe; text-align:left; font-weight:normal; font-size:11px; border:1px solid #ddd; }
    tbody th { width:12em; text-align:right; color:#666; padding-right:.5em; }
    ul { margin-left: 2em; margin-top: 1em; }
    #summary { background: #e0ebff; }
    #summary h2 { font-weight: normal; color: #666; }
    #explanation { background:#eee; }
    #instructions { background:#f6f6f6; }
    #summary table { border:none; background:transparent; }
  </style>
</head>

<body>
<div id="summary">
  <h1>It worked!</h1>
  <h2>Congratulations on your first Django-powered page.</h2>
</div>

<div id="instructions">
  <p>Of course, you haven't actually done any work yet. Here's what to do next:</p>
  <ul>
    <li>If you plan to use a database, edit the <code>DATABASES</code> setting in <code>{{ project_name }}/settings.py</code>.</li>
    <li>Start your first app by running <code>python {{ project_name }}/manage.py startapp [appname]</code>.</li>
  </ul>
</div>

<div id="explanation">
  <p>
    You're seeing this message because you have <code>DEBUG = True</code> in your
    Django settings file and you haven't configured any URLs. Get to work!
  </p>
</div>
</body></html>
"""
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