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import logging
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import os
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import uuid
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from django.conf import settings
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from django.core.paginator import Paginator
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from django.http import HttpResponse, HttpResponseForbidden
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from django.shortcuts import get_object_or_404
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from django.shortcuts import render
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from django.templatetags.static import static
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from django.utils import timezone
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from django.utils.translation import gettext_lazy as _
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from django.views.decorators.csrf import csrf_exempt
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from django.views.generic.detail import DetailView
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from django.views.generic.list import ListView
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from haystack.views import SearchView
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from blog.models import Article, Category, LinkShowType, Links, Tag
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from comments.forms import CommentForm
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from djangoblog.plugin_manage import hooks
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from djangoblog.plugin_manage.hook_constants import ARTICLE_CONTENT_HOOK_NAME
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from djangoblog.utils import cache, get_blog_setting, get_sha256
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logger = logging.getLogger(__name__)
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class ArticleListView(ListView):
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"""
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文章列表基类视图
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提供通用的文章列表功能和缓存机制
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"""
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# template_name属性用于指定使用哪个模板进行渲染
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template_name = 'blog/article_index.html'
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# context_object_name属性用于给上下文变量取名（在模板中使用该名字）
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context_object_name = 'article_list'
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# 页面类型，分类目录或标签列表等
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page_type = ''
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paginate_by = settings.PAGINATE_BY
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page_kwarg = 'page'
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link_type = LinkShowType.L
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def get_view_cache_key(self):
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"""获取视图缓存键 - 需要子类实现"""
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return self.request.get['pages']
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@property
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def page_number(self):
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"""获取当前页码"""
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page_kwarg = self.page_kwarg
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page = self.kwargs.get(
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page_kwarg) or self.request.GET.get(page_kwarg) or 1
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return page
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def get_queryset_cache_key(self):
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"""
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获取查询集缓存键
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子类必须重写此方法
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"""
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raise NotImplementedError()
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def get_queryset_data(self):
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"""
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获取查询集数据
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子类必须重写此方法
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"""
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raise NotImplementedError()
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def get_queryset_from_cache(self, cache_key):
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"""
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从缓存获取查询集数据
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Args:
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cache_key: 缓存键
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Returns:
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QuerySet: 文章查询集
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"""
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value = cache.get(cache_key)
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if value:
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logger.info('get view cache.key:{key}'.format(key=cache_key))
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return value
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else:
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article_list = self.get_queryset_data()
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cache.set(cache_key, article_list)
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logger.info('set view cache.key:{key}'.format(key=cache_key))
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return article_list
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def get_queryset(self):
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"""
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获取查询集 - 从缓存获取数据
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Returns:
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QuerySet: 文章查询集
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"""
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key = self.get_queryset_cache_key()
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value = self.get_queryset_from_cache(key)
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return value
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def get_context_data(self, **kwargs):
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"""添加上下文数据"""
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kwargs['linktype'] = self.link_type
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return super(ArticleListView, self).get_context_data(**kwargs)
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class IndexView(ArticleListView):
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"""
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首页视图
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显示最新的文章列表
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"""
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# 友情链接类型
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link_type = LinkShowType.I
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def get_queryset_data(self):
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"""获取首页文章数据"""
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article_list = Article.objects.filter(type='a', status='p')
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return article_list
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def get_queryset_cache_key(self):
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"""获取首页缓存键"""
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cache_key = 'index_{page}'.format(page=self.page_number)
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return cache_key
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class ArticleDetailView(DetailView):
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"""
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文章详情页面视图
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显示单篇文章的详细内容和评论
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"""
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template_name = 'blog/article_detail.html'
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model = Article
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pk_url_kwarg = 'article_id'
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context_object_name = "article"
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def get_context_data(self, **kwargs):
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"""添加上下文数据 - 文章详情和评论信息"""
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comment_form = CommentForm()
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article_comments = self.object.comment_list()
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parent_comments = article_comments.filter(parent_comment=None)
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blog_setting = get_blog_setting()
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paginator = Paginator(parent_comments, blog_setting.article_comment_count)
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page = self.request.GET.get('comment_page', '1')
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if not page.isnumeric():
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page = 1
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else:
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page = int(page)
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if page < 1:
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page = 1
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if page > paginator.num_pages:
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page = paginator.num_pages
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p_comments = paginator.page(page)
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next_page = p_comments.next_page_number() if p_comments.has_next() else None
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prev_page = p_comments.previous_page_number() if p_comments.has_previous() else None
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if next_page:
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kwargs[
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'comment_next_page_url'] = self.object.get_absolute_url() + f'?comment_page={next_page}#commentlist-container'
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if prev_page:
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kwargs[
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'comment_prev_page_url'] = self.object.get_absolute_url() + f'?comment_page={prev_page}#commentlist-container'
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kwargs['form'] = comment_form
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kwargs['article_comments'] = article_comments
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kwargs['p_comments'] = p_comments
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kwargs['comment_count'] = len(
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article_comments) if article_comments else 0
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kwargs['next_article'] = self.object.next_article
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kwargs['prev_article'] = self.object.prev_article
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context = super(ArticleDetailView, self).get_context_data(**kwargs)
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article = self.object
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# Action Hook, 通知插件"文章详情已获取"
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hooks.run_action('after_article_body_get', article=article, request=self.request)
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# # Filter Hook, 允许插件修改文章正文
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article.body = hooks.apply_filters(ARTICLE_CONTENT_HOOK_NAME, article.body, article=article,
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request=self.request)
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return context
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class CategoryDetailView(ArticleListView):
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"""
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分类目录列表视图
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显示指定分类下的所有文章
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"""
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page_type = "分类目录归档"
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def get_queryset_data(self):
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"""获取分类文章数据"""
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slug = self.kwargs['category_name']
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category = get_object_or_404(Category, slug=slug)
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categoryname = category.name
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self.categoryname = categoryname
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categorynames = list(
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map(lambda c: c.name, category.get_sub_categorys()))
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article_list = Article.objects.filter(
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category__name__in=categorynames, status='p')
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return article_list
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def get_queryset_cache_key(self):
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"""获取分类页面缓存键"""
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slug = self.kwargs['category_name']
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category = get_object_or_404(Category, slug=slug)
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categoryname = category.name
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self.categoryname = categoryname
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cache_key = 'category_list_{categoryname}_{page}'.format(
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categoryname=categoryname, page=self.page_number)
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return cache_key
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def get_context_data(self, **kwargs):
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"""添加上下文数据"""
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categoryname = self.categoryname
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try:
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categoryname = categoryname.split('/')[-1]
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except BaseException:
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pass
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kwargs['page_type'] = CategoryDetailView.page_type
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kwargs['tag_name'] = categoryname
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return super(CategoryDetailView, self).get_context_data(**kwargs)
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class AuthorDetailView(ArticleListView):
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"""
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作者详情页视图
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显示指定作者的所有文章
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"""
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page_type = '作者文章归档'
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def get_queryset_cache_key(self):
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"""获取作者页面缓存键"""
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from uuslug import slugify
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author_name = slugify(self.kwargs['author_name'])
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cache_key = 'author_{author_name}_{page}'.format(
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author_name=author_name, page=self.page_number)
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return cache_key
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def get_queryset_data(self):
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"""获取作者文章数据"""
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author_name = self.kwargs['author_name']
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article_list = Article.objects.filter(
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author__username=author_name, type='a', status='p')
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return article_list
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def get_context_data(self, **kwargs):
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"""添加上下文数据"""
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author_name = self.kwargs['author_name']
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kwargs['page_type'] = AuthorDetailView.page_type
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kwargs['tag_name'] = author_name
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return super(AuthorDetailView, self).get_context_data(**kwargs)
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class TagDetailView(ArticleListView):
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"""
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标签列表页面视图
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显示指定标签下的所有文章
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"""
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page_type = '分类标签归档'
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def get_queryset_data(self):
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"""获取标签文章数据"""
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slug = self.kwargs['tag_name']
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tag = get_object_or_404(Tag, slug=slug)
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tag_name = tag.name
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self.name = tag_name
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article_list = Article.objects.filter(
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tags__name=tag_name, type='a', status='p')
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return article_list
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def get_queryset_cache_key(self):
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"""获取标签页面缓存键"""
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slug = self.kwargs['tag_name']
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tag = get_object_or_404(Tag, slug=slug)
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tag_name = tag.name
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self.name = tag_name
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cache_key = 'tag_{tag_name}_{page}'.format(
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tag_name=tag_name, page=self.page_number)
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return cache_key
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def get_context_data(self, **kwargs):
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"""添加上下文数据"""
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# tag_name = self.kwargs['tag_name']
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tag_name = self.name
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kwargs['page_type'] = TagDetailView.page_type
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kwargs['tag_name'] = tag_name
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return super(TagDetailView, self).get_context_data(**kwargs)
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class ArchivesView(ArticleListView):
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"""
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文章归档页面视图
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按时间顺序显示所有文章
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"""
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page_type = '文章归档'
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paginate_by = None
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page_kwarg = None
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template_name = 'blog/article_archives.html'
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def get_queryset_data(self):
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"""获取归档数据"""
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return Article.objects.filter(status='p').all()
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def get_queryset_cache_key(self):
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"""获取归档页面缓存键"""
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cache_key = 'archives'
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return cache_key
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class LinkListView(ListView):
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"""
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友情链接列表视图
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显示所有启用的友情链接
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"""
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model = Links
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template_name = 'blog/links_list.html'
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def get_queryset(self):
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"""获取启用的友情链接"""
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return Links.objects.filter(is_enable=True)
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class EsSearchView(SearchView):
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"""
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Elasticsearch搜索视图
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扩展Haystack的搜索功能
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"""
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def get_context(self):
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"""获取搜索上下文数据"""
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paginator, page = self.build_page()
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context = {
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"query": self.query,
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"form": self.form,
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"page": page,
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"paginator": paginator,
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"suggestion": None,
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}
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if hasattr(self.results, "query") and self.results.query.backend.include_spelling:
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context["suggestion"] = self.results.query.get_spelling_suggestion()
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context.update(self.extra_context())
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return context
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@csrf_exempt
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def fileupload(request):
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"""
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文件上传视图
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提供图床功能，支持图片和文件上传
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Args:
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request: HTTP请求对象
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Returns:
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HttpResponse: 上传结果
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"""
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if request.method == 'POST':
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sign = request.GET.get('sign', None)
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if not sign:
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return HttpResponseForbidden()
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if not sign == get_sha256(get_sha256(settings.SECRET_KEY)):
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return HttpResponseForbidden()
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response = []
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for filename in request.FILES:
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timestr = timezone.now().strftime('%Y/%m/%d')
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imgextensions = ['jpg', 'png', 'jpeg', 'bmp']
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fname = u''.join(str(filename))
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isimage = len([i for i in imgextensions if fname.find(i) >= 0]) > 0
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base_dir = os.path.join(settings.STATICFILES, "files" if not isimage else "image", timestr)
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if not os.path.exists(base_dir):
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os.makedirs(base_dir)
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savepath = os.path.normpath(os.path.join(base_dir, f"{uuid.uuid4().hex}{os.path.splitext(filename)[-1]}"))
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if not savepath.startswith(base_dir):
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return HttpResponse("only for post")
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with open(savepath, 'wb+') as wfile:
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for chunk in request.FILES[filename].chunks():
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wfile.write(chunk)
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if isimage:
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from PIL import Image
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image = Image.open(savepath)
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image.save(savepath, quality=20, optimize=True)
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url = static(savepath)
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response.append(url)
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return HttpResponse(response)
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else:
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return HttpResponse("only for post")
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def page_not_found_view(
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request,
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exception,
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template_name='blog/error_page.html'):
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"""
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404页面未找到视图
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"""
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if exception:
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logger.error(exception)
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url = request.get_full_path()
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return render(request,
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template_name,
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{'message': _('Sorry, the page you requested is not found, please click the home page to see other?'),
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'statuscode': '404'},
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status=404)
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def server_error_view(request, template_name='blog/error_page.html'):
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"""
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500服务器错误视图
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"""
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return render(request,
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template_name,
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{'message': _('Sorry, the server is busy, please click the home page to see other?'),
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'statuscode': '500'},
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status=500)
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def permission_denied_view(
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request,
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exception,
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template_name='blog/error_page.html'):
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"""
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403权限拒绝视图
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"""
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if exception:
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logger.error(exception)
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return render(
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request, template_name, {
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'message': _('Sorry, you do not have permission to access this page?'),
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'statuscode': '403'}, status=403)
|
|
|
|
|
|
|
|
|
def clean_cache_view(request):
|
|
|
"""
|
|
|
清理缓存视图
|
|
|
用于手动清理系统缓存
|
|
|
"""
|
|
|
cache.clear()
|
|
|
return HttpResponse('ok')
|
