关于服务器——安装配置django
django是一个基于python语言的服务器框架，能够帮助我们轻易开发一个web应用，下面记录一些简单的安装使用方法。
sudo pip install Django==1.5.1
创建一个新的web服务（mysite，可以进行路由路径配置，数据库配置等）
django-admin.py startproject mysite
创建一个新的web应用（books，具体代码实现）
django-admin.py start app books
?
类似MVC框架，django提供model，view等模块供我们使用（不过django的model更类似于数据库定义，view类似MVC中的controller，template才是MVC中的view）编辑代码如下
books/models.py
from django.db import models# Create your models here.class Publisher(models.Model): name = models.CharField(max_length=30) address = models.CharField(max_length=50) city = models.CharField(max_length=60) state_province = models.CharField(max_length=30) country = models.CharField(max_length=50) website = models.URLField() def __unicode__(self): return self.name#class Author(models.Model):# first_name = models.CharField(max_length=30)# last_name = models.CharField(max_length=40)# email = models.EmailField()## def __unicode__(self):# return u'%s %s' % (self.first_name, self.last_name)#class Book(models.Model):# title = models.CharField(max_length=100)# authors = models.ManyToManyField(Author)# publisher = models.ForeignKey(Publisher)# publication_date = models.DateField()## def __unicode__(self):# return self.title
?books/views.py
# Create your views here.from django.shortcuts import render_to_responsefrom books.models import Publisherdef list_publishers(request): publishers = Publisher.objects.all() return render_to_response('list_publishers.html', {'publishers': publishers})?templates/list_publishers.html
<table> {% for p in publishers %} <tr> <td>Id #{{ p.id }}</td> <td>Name #{{ p.name }}</td> </tr> {% endfor %}</table>自定义配置web，设置数据库连接等
mysite/settings.py
INSTALLED_APPS = ( 'books',)DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'. 'NAME': '/home/ciaos/django.sqlite3', # Or path to database file if using sqlite3. # The following settings are not used with sqlite3: 'USER': '', 'PASSWORD': '', 'HOST': '', # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP. 'PORT': '', # Set to empty string for default. }}TEMPLATE_DIRS = ( '/home/ciaos/mysite/templates',)mysite/urls.py（利用python强大的正则表达式配置路由）
urlpatterns = patterns('', # Examples: # url(r'^$', 'mysite.views.home', name='home'), # url(r'^mysite/', include('mysite.foo.urls')), # Uncomment the admin/doc line below to enable admin documentation: # url(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: url(r'^publishers/',list_publishers))python manager.py syncdb同步models到数据库
通过python manage.py shell简单操作查询数据库
运行数据库如下（如果要后台运行可以使用nohup）
python manage.py runserver
?用ab测试
ciaos@linux-53dr:~/mysite> sudo /usr/sbin/ab2 -c 10 -n 10000 http://127.0.0.1:8000/publishers/This is ApacheBench, Version 2.3 <$Revision: 655654 $>Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/Licensed to The Apache Software Foundation, http://www.apache.org/Benchmarking 127.0.0.1 (be patient)Completed 1000 requestsCompleted 2000 requestsCompleted 3000 requestsCompleted 4000 requestsCompleted 5000 requestsCompleted 6000 requestsCompleted 7000 requestsCompleted 8000 requestsCompleted 9000 requestsCompleted 10000 requestsFinished 10000 requestsServer Software: WSGIServer/0.1Server Hostname: 127.0.0.1Server Port: 8000Document Path: /publishers/Document Length: 69 bytesConcurrency Level: 10Time taken for tests: 49.311 secondsComplete requests: 10000Failed requests: 0Write errors: 0Total transferred: 2020000 bytesHTML transferred: 690000 bytesRequests per second: 202.80 [#/sec] (mean)Time per request: 49.311 [ms] (mean)Time per request: 4.931 [ms] (mean, across all concurrent requests)Transfer rate: 40.00 [Kbytes/sec] receivedConnection Times (ms) min mean[+/-sd] median maxConnect: 0 2 38.6 0 1001Processing: 22 47 82.8 36 2562Waiting: 6 41 82.7 31 2553Total: 22 49 91.3 36 2562Percentage of the requests served within a certain time (ms) 50% 36 66% 39 75% 41 80% 42 90% 52 95% 63 98% 100 99% 428 100% 2562 (longest request)
并发数据等没有参考意义，因为是在我笔记本的虚拟机上测试的，主要是与tornado服务器做对比。用django实现一个简易的web应用还是非常方便的。