django通过middleware计算每个页面的详细执行时间

你可以自定义一个MiddleWare类，然后在settings.py引用这个中间件，添加到MIDDLEWARE_CLASSES里，然后在公共模板里添显示代码即可。

添加到公共模板里的代码：

<div id="stats"><!-- STATS: Total: %(totTime).2fs <br/>Python: %(pyTime).2fs<br/>DB: %(dbTime).2fs <br/>Queries: %(queries)d --></div>

StatsMiddleware 中间件代码

from django.db import connection

from time import time

from operator import add

import re

class StatsMiddleware(object):

def process_view(self, request, view_func, view_args, view_kwargs):

"""

In your base template, put this:

{% if debug %}  <div id="stats"><!-- STATS: Total: %(totTime).2fs <br/>

Python: %(pyTime).2fs <br/>

DB: %(dbTime).2fs <br/>

Queries: %(queries)d --></div> {% endif %}

Here's the css style I use:

#stats { font-size: 65%; padding: 5px;

z-index: 1000; position: absolute; right: 5px; top: 5px;

-moz-opacity: .7; opacity: .7;}

"""

#This stuff will only happen if debug is already on

if not settings.DEBUG:

return None

# get number of db queries before we do anything

n = len(connection.queries)

# time the view

start = time()

response = view_func(request, *view_args, **view_kwargs)

totTime = time() - start

# compute the db time for the queries just run

queries = len(connection.queries) - n

if queries:

dbTime = reduce(add, [float(q['time'])

for q in connection.queries[n:]])

else:

dbTime = 0.0

# and backout python time

pyTime = totTime - dbTime

stats = {

'totTime': totTime,

'pyTime': pyTime,

'dbTime': dbTime,

'queries': queries,

}

# replace the comment if found

if response and response.content:

s = response.content

regexp = re.compile(r'(?P<cmt><!--\s*STATS:(?P<fmt>.*?)-->)')

match = regexp.search(s)

if match:

s = s[:match.start('cmt')] + \

match.group('fmt') % stats + \

s[match.end('cmt'):]

response.content = s

return response

保存为：statsmiddleware.py， 
然后添加到settings.py的MIDDLEWARE_CLASSES里

文章转载：http://www.sharejs.com/codes/python/8638