页面静态化
商城的首页频繁被访问，为了提升访问速度，除了我们之前已经学过的使用缓存技术外，还可以使用页面静态化技术。
页面静态化即将动态渲染生成的页面结果保存成html文件，放到静态文件服务器中。用户访问的时候访问的直接是处理好之后的html静态文件。
对于页面中属于每个用户展示不同数据内容的部分，可以在用户请求完静态化之后的页面后，在页面中向后端发送请求，获取属于用户的特殊的数据。
我们现在将首页进行页面静态化处理。
在广告内容应用contents中，新建crons.py文件（该文件会用于后面讲解的定时任务），在该文件中编写处理页面静态化的逻辑。
from collections import OrderedDict
from django.conf import settings
from django.template import loader
import os
import time
from goods.models import GoodsChannel
from .models import ContentCategory
def generate_static_index_html():
"""
生成静态的主页html文件
"""
print('%s: generate_static_index_html' % time.ctime())
# 商品频道及分类菜单
# 使用有序字典保存类别的顺序
# categories = {
# 1: { # 组1
# 'channels': [{'id':, 'name':, 'url':},{}, {}...],
# 'sub_cats': [{'id':, 'name':, 'sub_cats':[{},{}]}, {}, {}, ..]
# },
# 2: { # 组2
#
# }
# }
categories = OrderedDict()
channels = GoodsChannel.objects.order_by('group_id', 'sequence')
for channel in channels:
group_id = channel.group_id # 当前组
if group_id not in categories:
categories[group_id] = {'channels': [], 'sub_cats': []}
cat1 = channel.category # 当前频道的类别
# 追加当前频道
categories[group_id]['channels'].append({
'id': cat1.id,
'name': cat1.name,
'url': channel.url
})
# 构建当前类别的子类别
for cat2 in cat1.goodscategory_set.all():
cat2.sub_cats = []
for cat3 in cat2.goodscategory_set.all():
cat2.sub_cats.append(cat3)
categories[group_id]['sub_cats'].append(cat2)
# 广告内容
contents = {}
content_categories = ContentCategory.objects.all()
for cat in content_categories:
contents[cat.key] = cat.content_set.filter(status=True).order_by('sequence')
# 渲染模板
context = {
'categories': categories,
'contents': contents
}
template = loader.get_template('index.html')
html_text = template.render(context)
file_path = os.path.join(settings.GENERATED_STATIC_HTML_FILES_DIR, 'index.html')
with open(file_path, 'w', encoding='utf-8') as f:
f.write(html_text)
在配置文件中添加保存静态文件的目录
# 生成的静态html文件保存目录
GENERATED_STATIC_HTML_FILES_DIR = os.path.join(os.path.dirname(os.path.dirname(BASE_DIR)), 'front_end_pc')
在meiduo_mall 中新建templates模板目录，配置模板目录
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
在模板目录中新建index.html模板文件
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>美多商城-首页</title>
<link rel="stylesheet" type="text/css" href="css/reset.css">
<link rel="stylesheet" type="text/css" href="css/main.css">
<script type="text/javascript" src="js/host.js"></script>
<script type="text/javascript" src="js/vue-2.5.16.js"></script>
<script type="text/javascript" src="js/axios-0.18.0.min.js"></script>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript" src="js/slide.js"></script>
</head>
<body>
<div id="app" v-cloak>
<div class="header_con">
<div class="header">
<div class="welcome fl">欢迎来到美多商城!</div>
<div class="fr">
<div v-if="username" class="login_btn fl">
欢迎您：<em>[[ username ]]</em>
<span>|</span>
<a @click="logout">退出</a>
</div>
<div v-else class="login_btn fl">
<a href="login.html">登录</a>
<span>|</span>
<a href="register.html">注册</a>
</div>
<div class="user_link fl">
<span>|</span>
<a href="user_center_info.html">用户中心</a>
<span>|</span>
<a href="cart.html">我的购物车</a>
<span>|</span>
<a href="user_center_order.html">我的订单</a>
</div>
</div>
</div>
</div>
<div class="search_bar clearfix">
<a href="index.html" class="logo fl"><img src="images/logo.png"></a>
<div class="search_wrap fl">
<form method="get" action="/search.html" class="search_con">
<input type="text" class="input_text fl" name="q" placeholder="搜索商品">
<input type="submit" class="input_btn fr" name="" value="搜索">
</form>
<ul class="search_suggest fl">
<li><a href="#">索尼微单</a></li>
<li><a href="#">优惠15元</a></li>
<li><a href="#">美妆个护</a></li>
<li><a href="#">买2免1</a></li>
</ul>
</div>
<div class="guest_cart fr">
<a href="#" class="cart_name fl">我的购物车</a>
<div class="goods_count fl" id="show_count">15</div>
<ul class="cart_goods_show">
<li>
<img src="images/goods/goods001.jpg" alt="商品图片">
<h4>商品名称手机</h4>
<div>4</div>
</li>
<li>
<img src="images/goods/goods002.jpg" alt="商品图片">
<h4>商品名称手机</h4>
<div>5</div>
</li>
<li>
<img src="images/goods/goods003.jpg" alt="商品图片">
<h4>商品名称手机</h4>
<div>6</div>
</li>
<li>
<img src="images/goods/goods003.jpg" alt="商品图片">
<h4>商品名称手机</h4>
<div>6</div>
</li>
</ul>
</div>
</div>
<div class="navbar_con">
<div class="navbar">
<h1 class="fl">商品分类</h1>
<ul class="navlist fl">
<li><a href="">首页</a></li>
<li class="interval">|</li>
<li><a href="">真划算</a></li>
<li class="interval">|</li>
<li><a href="">抽奖</a></li>
</ul>
</div>
</div>
<div class="pos_center_con clearfix">
<ul class="slide">
{% for content in contents.index_lbt %}
<li><a href="{{ content.url }}"><img src="{{ content.image.url }}" alt="{{ content.title }}"></a></li>
{% endfor %}
</ul>
<div class="prev"></div>
<div class="next"></div>
<ul class="points">
<!-- <li class="active"></li>
<li></li>
<li></li>
<li></li> -->
</ul>
<ul class="sub_menu">
{% for group in categories.values %}
<li>
<div class="level1">
{% for channel in group.channels %}
<a href="{{ channel.url }}">{{ channel.name }}</a>
{% endfor %}
</div>
<div class="level2">
{% for cat2 in group.sub_cats %}
<div class="list_group">
<div class="group_name fl">{{cat2.name}} ></div>
<div class="group_detail fl">
{% for cat3 in cat2.sub_cats %}
<a href="/list.html?cat={{cat3.id}}">{{cat3.name}}</a>
{% endfor %}
</div>
</div>
{% endfor %}
</div>
</li>
{% endfor %}
</ul>
<div class="news">
<div class="news_title">
<h3>快讯</h3>
<a href="#">更多 ></a>
</div>
<ul class="news_list">
{% for content in contents.index_kx %}
<li><a href="{{ content.url }}">{{ content.title }}</a></li>
{% endfor %}
</ul>
{% for content in contents.index_ytgg %}
<a href="{{ content.url }}" class="advs"><img src="{{ content.image.url }}"></a>
{% endfor %}
</div>
</div>
<div class="list_model">
<div class="list_title clearfix">
<h3 class="fl" id="model01">1F 手机通讯</h3>
<div class="subtitle fr">
<a @mouseenter="f1_tab=1" :class="f1_tab===1?'active':''">时尚新品</a>
<a @mouseenter="f1_tab=2" :class="f1_tab===2?'active':''">畅想低价</a>
<a @mouseenter="f1_tab=3" :class="f1_tab===3?'active':''">手机配件</a>
</div>
</div>
<div class="goods_con clearfix">
<div class="goods_banner fl">
<img src="{{ contents.index_1f_logo.0.image.url }}">
<div class="channel">
{% for content in contents.index_1f_pd %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
<div class="key_words">
{% for content in contents.index_1f_bq %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
</div>
<ul v-show="f1_tab===1" class="goods_list fl">
{% for content in contents.index_1f_ssxp %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
<ul v-show="f1_tab===2" class="goods_list fl">
{% for content in contents.index_1f_cxdj %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
<ul v-show="f1_tab===3" class="goods_list fl">
{% for content in contents.index_1f_sjpj %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
</div>
</div>
<div class="list_model model02">
<div class="list_title clearfix">
<h3 class="fl" id="model01">2F 电脑数码</h3>
<div class="subtitle fr">
<a @mouseenter="f2_tab=1" :class="f2_tab===1?'active':''">加价换购</a>
<a @mouseenter="f2_tab=2" :class="f2_tab===2?'active':''">畅享低价</a>
</div>
</div>
<div class="goods_con clearfix">
<div class="goods_banner fl">
<img src="{{ contents.index_2f_logo.0.image.url}}">
<div class="channel">
{% for content in contents.index_2f_pd %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
<div class="key_words">
{% for content in contents.index_2f_bq %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
</div>
<ul v-show="f2_tab===1" class="goods_list fl">
{% for content in contents.index_2f_jjhg %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
<ul v-show="f2_tab===2" class="goods_list fl">
{% for content in contents.index_2f_cxdj %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
</div>
</div>
<div class="list_model model03">
<div class="list_title clearfix">
<h3 class="fl" id="model01">3F 家居家装</h3>
<div class="subtitle fr">
<a @mouseenter="f3_tab=1" :class="f3_tab===1?'active':''">生活用品</a>
<a @mouseenter="f3_tab=2" :class="f3_tab===2?'active':''">厨房用品</a>
</div>
</div>
<div class="goods_con clearfix">
<div class="goods_banner fl">
<img src="{{ contents.index_3f_logo.0.image.url }}">
<div class="channel">
{% for content in contents.index_3f_pd %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
<div class="key_words">
{% for content in contents.index_3f_bq %}
<a href="{{ content.url }}">{{ content.title }}</a>
{% endfor %}
</div>
</div>
<ul v-show="f3_tab===1" class="goods_list fl">
{% for content in contents.index_3f_shyp %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
<ul v-show="f3_tab===2" class="goods_list fl">
{% for content in contents.index_3f_cfyp %}
<li>
<a href="{{ content.url }}" class="goods_pic"><img src="{{ content.image.url }}"></a>
<h4><a href="{{ content.url }}" title="{{ content.title }}">{{ content.title }}</a></h4>
<div class="prize">{{ content.text }}</div>
</li>
{% endfor %}
</ul>
</div>
</div>
<div class="footer">
<div class="foot_link">
<a href="#">关于我们</a>
<span>|</span>
<a href="#">联系我们</a>
<span>|</span>
<a href="#">招聘人才</a>
<span>|</span>
<a href="#">友情链接</a>
</div>
<p>CopyRight © 2016 北京美多商业股份有限公司 All Rights Reserved</p>
<p>电话：010-****888 京ICP备*******8号</p>
</div>
</div>
<script type="text/javascript" src="js/index.js"></script>
</body>
</html>
在前端js目录中新建index.js文件
var vm = new Vue({
el: '#app',
delimiters: ['[[', ']]'],
data: {
host,
username: sessionStorage.username || localStorage.username,
user_id: sessionStorage.user_id || localStorage.user_id,
token: sessionStorage.token || localStorage.token,
cart_total_count: 0, // 购物车总数量
cart: [], // 购物车数据,
f1_tab: 1, // 1F 标签页控制
f2_tab: 1, // 2F 标签页控制
f3_tab: 1, // 3F 标签页控制
},
mounted: function(){
this.get_cart();
},
methods: {
// 退出
logout: function(){
sessionStorage.clear();
localStorage.clear();
location.href = '/login.html';
},
// 获取购物车数据
get_cart: function(){
}
}
});
注意
在页面中既会用到Django的模板语法，也会用到前端Vue的模板语法，可以通过在前端中修改Vue的模板变量语法来避免冲突
var vm = new Vue({
el: '#app',
delimiters: ['[[', ']]'],
...
})
通过delimiters声明，将Vue的模板变量变为了[[、]]