基于django的个人博客网站建立（七）

前言

这次在原来的基础上添加或修改一些小功能

具体内容

1.代码高亮

在原来的blog-details.html页面添加下面的代码：

<link href="Http://cdn.bootCSS.com/highlight.js/9.12.0/styles/Googlecode.min.css" rel="stylesheet">

<script src="http://cdn.bootcss.com/highlight.js/8.0/highlight.min.js"></script>

<script>hljs.initHighlightingOnLoad();</script>

它会自动高亮由markdown转换成的代码部分，即

<pre><code></code></pre>

2.统计文章阅读数量

通过在用户浏览器上存储唯一id来保证识别用户

每篇文章每个浏览器只能够每天一次增加浏览数目

首先先为article表添加浏览数目字段

class Article(models.Model):
    title = models.CharField(max_length=128)
    markdownContent = models.TextField(default='')
    htmlContent = models.TextField()
    read_num = models.IntegerField(default=0)
    creationTime = models.DateTimeField(auto_now_add=True)

然后通过中间件的方式来为用户浏览器设置唯一id

from Django.utils.deprecation import MiddlewareMixin
import uuid

class UserIdMiddleware(MiddlewareMixin):

    def process_request(self, request):
        try:
            uid = request.COOKIES['uid']
        except KeyError:
            uid = uuid.uuid4().hex
        request.uid = uid

    def process_response(self, request, response):
        response.set_cookie('uid',request.uid,max_age=60*60*24*365*10,httponly=True)
        return response

并在setting中把中间件加入

接下来修改视图函数，为了方便将原来的视图函数改成了CBV

class Blog_details(View):
    def get(self,request,*args,**kwargs):
        all_type = models.ArticleType.objects.all()
        article_id = request.GET.get('article_id')

        if self.is_increase():
            models.Article.objects.filter(id=article_id).update(read_num=F('read_num') + 1)
        else:
            pass
        article_obj = models.Article.objects.filter(id=article_id).first()
        return render(request, 'show/blog-details.html', {'article_obj': article_obj, 'all_type': all_type})

    def is_increase(self):
        increase = False
        uid = self.request.uid
        read_id =uid+self.request.path+str(date.today())
        if not cache.get(read_id):
            increase = True
            cache.set(read_id,1,24*60*60)
        return increase

最后在页面一并将浏览数目显示即可

3.添加sitemap

在blog下建立sitemap.py

from django.contrib.sitemaps import Sitemap
from django.urls import reverse

from backend import models

class ArticleSitemap(Sitemap):
    changefreq = 'always'
    priority = 1.0
    protocol = 'http'

    def items(self):
        return models.Article.objects.all()

    def lastmod(self,obj):
        return obj.creationTime

    def location(self,obj):
        return 'blog-details/?article_id='+str(obj.id)

在temlpates下编写sitemap.xml

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">

{% spaceless %}
{% for url in urlset %}
<url>
<loc>
{{ url.location }}
</loc>
<lastmod>{{ url.lastmod|date:"Y-m-d" }}</lastmod>
<changefreq>{{ url.changefreq }}</changefreq>

<priority>{{ url.priority }}</priority>

</url>

{% endfor %}

{% endspaceless %}
</urlset>

添加url

from django.contrib.sitemaps import views as sitemap_views
from blog.sitemap import ArticleSitemap

urlpatterns = [
    path('admin/', admin.site.urls),
    path('',views.index),
    path('index/',views.index),
    path('backend/',include('backend.urls')),
    path('blog-details/',views.Blog_details.as_view(),name="blog-details"),
    path('saysomethingtome/', views.saysomethingtome),
    path('article_comment/',views.article_comment),
    path('category/',views.category),
    path('category/details/', views.category_details),
    path('record/', views.record),
    path('about/', views.about),
    path('sitemap.xml/',sitemap_views.sitemap,{'sitemaps':{'article':ArticleSitemap}})
]

之后访问127.0.0.1:8000/sitemap.xml 就可以得到