Login

DebugFooter middleware with textmate links

Author:
crucialfelix
Posted:
September 7, 2008
Language:
Python
Version:
1.0
Tags:
middleware debug textmate
Score:
4 (after 4 ratings)

a minor remix of simon's debug footer: http://www.djangosnippets.org/snippets/766/

Adds a hidden footer to the bottom of every text/html page containing a list of SQL queries executed and templates that were loaded (including their full filesystem path to help debug complex template loading scenarios).

This version adds TextMate links : if you are working on your local machine and using TextMate you can click on the template paths and they will be opened in TextMate. This speeds up development time considerably !

also, this works with django 1.0 (simon's version got broke by the 'connect' refactor)

update: the view function is now linked

To use, drop in to a file called 'debug_middleware.py' on your Python path and add 'debug_middleware.DebugFooter' to your MIDDLEWARE_CLASSES setting.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
# minor remix of
# http://www.djangosnippets.org/snippets/766/
# by simon

import time
from django.dispatch import dispatcher
from django.core.signals import request_started
from django.test.signals import template_rendered
from django.conf import settings
from django.db import connection
from django.utils.encoding import force_unicode
from django.utils.safestring import mark_safe

TEMPLATE = """
<div id="debug" style="clear:both;">
<a href="#debugbox"
    onclick="this.style.display = 'none';
        document.getElementById('debugbox').style.display = 'block';
        return false;"
    style="font-size: small; color: red; text-decoration: none; display: block; margin: 12px;"
>+</a>

<div style="display: none;clear: both; border: 1px solid red; padding: 12px; margin: 12px; overflow: scroll" id="debugbox">

<p>Server-time taken: {{ server_time|floatformat:"5" }} seconds</p>
<p>View: <strong>{{view}}</strong></p>
<p>Templates used:</p>
{% if templates %}
<ol>
    {% for template in templates %}
        <li><strong>{{ template.0 }}</strong> loaded from <samp>{{ template.1 }}</samp></li>
    {% endfor %}
</ol>
{% else %}
    None
{% endif %}
<p>Template path:</p>
{% if template_dirs %}
    <ol>
    {% for template in template_dirs %}
        <li>{{ template }}</li>
    {% endfor %}
    </ol>
{% else %}
    None
{% endif %}
<p>SQL executed:</p>
{% if sql %}
<ol>
{% for query in sql %}
    <li><pre>{{ query.sql|linebreaksbr }}</pre><p>took {{ query.time|floatformat:"3" }} seconds</p></li>
{% endfor %}
</ol>
<p>Total SQL time: {{ sql_total }}</p>
{% else %}
    None
{% endif %}
</div>
</div>
</body>
"""

# Monkeypatch instrumented test renderer from django.test.utils - we could use
# django.test.utils.setup_test_environment for this but that would also set up
# e-mail interception, which we don't want
from django.test.utils import instrumented_test_render
from django.template import Template, Context
if Template.render != instrumented_test_render:
    Template.original_render = Template.render
    Template.render = instrumented_test_render
# MONSTER monkey-patch
old_template_init = Template.__init__
def new_template_init(self, template_string, origin=None, name='<Unknown Template>'):
    old_template_init(self, template_string, origin, name)
    self.origin = origin
Template.__init__ = new_template_init

class DebugFooter:
    def process_request(self, request):
        self.time_started = time.time()
        self.templates_used = []
        self.contexts_used = []
        self.sql_offset_start = len(connection.queries)
        template_rendered.connect(self._storeRenderedTemplates)

    def process_response(self, request, response):
        # Only include debug info for text/html pages not accessed via Ajax
        if 'text/html' not in response['Content-Type']:
            return response
        if request.is_ajax():
            return response
        if not settings.DEBUG:
            return response
        if response.status_code != 200:
            return response

        templates = [
            (t.name, t.origin and _txtmate(t.origin.name,t.origin.name) or 'No origin')
            for t in self.templates_used
        ]

        sql_queries = connection.queries[self.sql_offset_start:]
        # Reformat sql queries a bit
        sql_total = 0.0
        for query in sql_queries:
            query['sql'] = reformat_sql(query['sql'])
            sql_total += float(query['time'])

        from django.core.urlresolvers import resolve
        view_func, args, kwargs = resolve(request.META['PATH_INFO'])

        if hasattr(view_func,'view_func'):
            # it the view_func has a view_func then its a decorator
            co = view_func.view_func.func_code
        else:
            co = view_func.func_code
            
        co.co_filename
        co.co_firstlineno

        view =  '%s.%s' % (view_func.__module__, view_func.__name__)
        view = _txtmate(co.co_filename,view,co.co_firstlineno)
        debug_content = Template(TEMPLATE).render(Context({
            'server_time': time.time() - self.time_started,
            'templates': templates,
            'sql': sql_queries,
            'sql_total': sql_total,
            'template_dirs': settings.TEMPLATE_DIRS,
            'view': view
        }))

        content = response.content
        response.content = force_unicode(content).replace('</body>', debug_content)

        return response

    def _storeRenderedTemplates(self, **kwargs):
        #signal=signal, sender=sender, template=template, context=context):
        template = kwargs.get('template')
        if(template):
            self.templates_used.append(template)
        context = kwargs.get('context')
        if(context):
            self.contexts_used.append(context)


def reformat_sql(sql):
    sql = sql.replace('`,`', '`, `')
    sql = sql.replace('` FROM `', '` \n  FROM `')
    sql = sql.replace('` WHERE ', '` \n  WHERE ')
    sql = sql.replace(' ORDER BY ', ' \n  ORDER BY ')
    return sql

def _txtmate(path,name,lineno=""):
    return mark_safe("<a href='txmt://open/?url=file://%s&line=%s'>%s</a>" % (path,lineno,name))

More like this

  1. DebugMiddleware footer with links to quick open file/line# in TextMate on local machine by felix_the_third 5 years, 5 months ago
  2. DebugFooter middleware with Pygments sql syntax highlighting by monolar 7 years ago
  3. EditingMiddleware (quickly open views and templates in your text editor!) by johnboxall 6 years, 1 month ago
  4. DebugFooter middleware by simon 7 years, 1 month ago
  5. DebugFooter middleware for django 1.0 and higher by ngadimin 5 years, 7 months ago

Comments

Please login first before commenting.