385 lines
14 KiB
Python
385 lines
14 KiB
Python
"""
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Django Admin扩展
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提供增强的管理界面功能
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"""
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import logging
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from datetime import datetime, timedelta
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from django.contrib import admin
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from django.contrib.admin import SimpleListFilter
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from django.contrib.admin.utils import model_format_dict
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from django.contrib import messages
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from django.http import HttpResponseRedirect
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from django.urls import path, reverse
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from django.utils.html import format_html
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from django.utils import timezone
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from django.db.models import Count, Q
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from django.core.cache import cache
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from .models import Website, Article
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from .tasks import crawl_website, crawl_all_websites, cleanup_old_articles
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from .distributed_crawler import distributed_crawler
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logger = logging.getLogger(__name__)
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class WebsiteStatusFilter(SimpleListFilter):
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"""网站状态过滤器"""
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title = '网站状态'
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parameter_name = 'status'
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def lookups(self, request, model_admin):
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return (
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('enabled', '已启用'),
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('disabled', '已禁用'),
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('no_articles', '无文章'),
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('recent_crawl', '最近爬取'),
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)
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def queryset(self, request, queryset):
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if self.value() == 'enabled':
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return queryset.filter(enabled=True)
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elif self.value() == 'disabled':
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return queryset.filter(enabled=False)
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elif self.value() == 'no_articles':
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return queryset.annotate(article_count=Count('article')).filter(article_count=0)
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elif self.value() == 'recent_crawl':
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week_ago = timezone.now() - timedelta(days=7)
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return queryset.filter(last_crawl__gte=week_ago)
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return queryset
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class ArticleDateFilter(SimpleListFilter):
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"""文章日期过滤器"""
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title = '发布时间'
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parameter_name = 'date_range'
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def lookups(self, request, model_admin):
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return (
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('today', '今天'),
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('week', '本周'),
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('month', '本月'),
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('quarter', '本季度'),
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)
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def queryset(self, request, queryset):
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now = timezone.now()
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if self.value() == 'today':
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return queryset.filter(created_at__date=now.date())
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elif self.value() == 'week':
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week_start = now - timedelta(days=now.weekday())
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return queryset.filter(created_at__gte=week_start.replace(hour=0, minute=0, second=0))
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elif self.value() == 'month':
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return queryset.filter(created_at__year=now.year, created_at__month=now.month)
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elif self.value() == 'quarter':
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quarter = (now.month - 1) // 3
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quarter_start_month = quarter * 3 + 1
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return queryset.filter(
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created_at__year=now.year,
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created_at__month__gte=quarter_start_month,
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created_at__month__lt=quarter_start_month + 3
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)
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return queryset
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class WebsiteAdmin(admin.ModelAdmin):
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"""网站管理"""
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list_display = [
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'name', 'base_url', 'enabled', 'article_count',
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'last_crawl_display', 'status_indicator', 'actions_column'
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]
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list_filter = [WebsiteStatusFilter, 'enabled']
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search_fields = ['name', 'base_url']
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readonly_fields = ['article_count']
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actions = ['enable_websites', 'disable_websites', 'crawl_selected', 'crawl_all']
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fieldsets = (
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('基本信息', {
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'fields': ('name', 'base_url', 'enabled')
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}),
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('统计信息', {
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'fields': ('article_count',),
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'classes': ('collapse',)
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}),
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('时间信息', {
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'fields': (),
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'classes': ('collapse',)
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}),
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)
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# 添加get_websites方法以支持模板中的网站选择
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def get_websites(self, request):
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"""获取所有启用的网站，用于模板中的选择框"""
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return Website.objects.filter(enabled=True)
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def article_count(self, obj):
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"""文章数量"""
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return obj.article_set.count()
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article_count.short_description = '文章数量'
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def last_crawl_display(self, obj):
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"""最后爬取时间显示"""
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return '未实现'
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last_crawl_display.short_description = '最后爬取'
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def status_indicator(self, obj):
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"""状态指示器"""
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if obj.enabled:
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return format_html('<span style="color: green;">●</span> 正常')
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else:
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return format_html('<span style="color: red;">●</span> 禁用')
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status_indicator.short_description = '状态'
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def actions_column(self, obj):
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"""操作列"""
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return format_html(
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'<a href="{}" class="button">爬取</a> '
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'<a href="{}" class="button">查看文章</a>',
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reverse('admin:crawl_website', args=[obj.id]),
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reverse('admin:core_article_changelist') + f'?website__id__exact={obj.id}'
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)
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actions_column.short_description = '操作'
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def enable_websites(self, request, queryset):
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"""启用选中的网站"""
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updated = queryset.update(enabled=True)
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self.message_user(request, f'成功启用 {updated} 个网站')
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enable_websites.short_description = '启用选中的网站'
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def disable_websites(self, request, queryset):
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"""禁用选中的网站"""
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updated = queryset.update(enabled=False)
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self.message_user(request, f'成功禁用 {updated} 个网站')
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disable_websites.short_description = '禁用选中的网站'
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def crawl_selected(self, request, queryset):
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"""爬取选中的网站"""
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for website in queryset:
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try:
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task = crawl_website.delay(website.id)
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self.message_user(
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request,
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f'网站 {website.name} 爬取任务已启动 (任务ID: {task.id})',
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messages.SUCCESS
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)
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except Exception as e:
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error_msg = str(e)
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if "[Errno 61] Connection refused" in error_msg:
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detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
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else:
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detailed_msg = error_msg
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self.message_user(
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request,
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f'网站 {website.name} 爬取任务启动失败: {detailed_msg}',
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messages.ERROR
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)
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crawl_selected.short_description = '爬取选中的网站'
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def crawl_all(self, request, queryset):
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try:
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task = crawl_all_websites.delay()
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self.message_user(
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request,
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f'批量爬取任务已启动 (任务ID: {task.id})',
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messages.SUCCESS
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)
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except Exception as e:
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error_msg = str(e)
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if "[Errno 61] Connection refused" in error_msg:
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detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
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else:
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detailed_msg = error_msg
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self.message_user(
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request,
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f'批量爬取任务启动失败: {detailed_msg}',
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messages.ERROR
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)
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# crawl_all.short_description = '爬取所有网站'
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def get_urls(self):
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"""添加自定义URL"""
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urls = super().get_urls()
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custom_urls = [
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path(
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'<int:website_id>/crawl/',
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self.admin_site.admin_view(self.crawl_website_view),
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name='crawl_website',
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),
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path(
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'run-crawler/',
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self.admin_site.admin_view(self.run_crawler_view),
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name='run_crawler',
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),
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]
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return custom_urls + urls
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def crawl_website_view(self, request, website_id):
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"""爬取单个网站视图"""
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try:
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website = Website.objects.get(id=website_id)
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task = crawl_website.delay(website_id)
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self.message_user(
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request,
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f'网站 {website.name} 爬取任务已启动 (任务ID: {task.id})',
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messages.SUCCESS
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)
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except Website.DoesNotExist:
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self.message_user(request, '网站不存在', messages.ERROR)
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except Exception as e:
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error_msg = str(e)
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if "[Errno 61] Connection refused" in error_msg:
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detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
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else:
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detailed_msg = error_msg
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self.message_user(request, f'爬取任务启动失败: {detailed_msg}', messages.ERROR)
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return HttpResponseRedirect(reverse('admin:core_website_changelist'))
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def run_crawler_view(self, request):
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"""运行爬虫视图"""
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try:
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task = crawl_all_websites.delay()
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self.message_user(
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request,
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f'批量爬取任务已启动 (任务ID: {task.id})',
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messages.SUCCESS
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)
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except Exception as e:
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error_msg = str(e)
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if "[Errno 61] Connection refused" in error_msg:
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detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
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else:
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detailed_msg = error_msg
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self.message_user(
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request,
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f'批量爬取任务启动失败: {detailed_msg}',
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messages.ERROR
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)
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return HttpResponseRedirect(reverse('admin:core_website_changelist'))
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class ArticleAdmin(admin.ModelAdmin):
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"""文章管理"""
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list_display = [
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'title', 'website', 'created_at',
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'media_count', 'actions_column'
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]
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list_filter = [
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ArticleDateFilter, 'website', 'created_at'
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]
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search_fields = ['title', 'content', 'url']
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readonly_fields = ['created_at', 'media_files_display']
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date_hierarchy = 'created_at'
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fieldsets = (
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('基本信息', {
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'fields': ('title', 'url', 'website')
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}),
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('内容', {
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'fields': ('content',)
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}),
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('媒体文件', {
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'fields': ('media_files_display',),
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'classes': ('collapse',)
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}),
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('时间信息', {
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'fields': ('created_at',),
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'classes': ('collapse',)
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}),
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)
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def content_preview(self, obj):
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"""内容预览"""
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return obj.content[:100] + '...' if len(obj.content) > 100 else obj.content
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content_preview.short_description = '内容预览'
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def media_count(self, obj):
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"""媒体文件数量"""
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if obj.media_files:
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return len(obj.media_files)
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return 0
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media_count.short_description = '媒体文件'
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def media_files_display(self, obj):
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"""媒体文件显示"""
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if not obj.media_files:
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return '无媒体文件'
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html = '<div style="max-height: 300px; overflow-y: auto;">'
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for i, media in enumerate(obj.media_files):
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if media.get('type') == 'image':
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html += f'<div style="margin: 10px 0;"><img src="{media["url"]}" style="max-width: 200px; max-height: 150px;" /></div>'
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elif media.get('type') == 'video':
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html += f'<div style="margin: 10px 0;"><video controls style="max-width: 200px;"><source src="{media["url"]}" type="video/mp4"></video></div>'
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html += '</div>'
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return format_html(html)
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media_files_display.short_description = '媒体文件'
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def actions_column(self, obj):
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"""操作列"""
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# 修改: 添加跳转到本地文章详情页的链接
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return format_html(
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'<a href="{}" target="_blank" class="button">查看原文</a> '
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'<a href="{}" target="_blank" class="button">本地查看</a>',
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obj.url,
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reverse('article_detail', args=[obj.id])
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)
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actions_column.short_description = '操作'
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class CrawlerStatusAdmin(admin.ModelAdmin):
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"""爬虫状态管理"""
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change_list_template = 'admin/crawler_status.html'
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def changelist_view(self, request, extra_context=None):
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"""爬虫状态视图"""
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# 获取分布式爬虫状态
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nodes = distributed_crawler.get_available_nodes()
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node_statuses = []
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for node_id in nodes:
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status = distributed_crawler.get_node_status(node_id)
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node_statuses.append(status)
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# 获取最近的批次
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batches = distributed_crawler.get_all_batches()[:10]
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# 获取任务统计
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task_stats = {
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'active_tasks': len([n for n in node_statuses if n['active_tasks'] > 0]),
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'total_nodes': len(nodes),
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'total_batches': len(batches),
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}
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extra_context = extra_context or {}
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extra_context.update({
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'nodes': node_statuses,
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'batches': batches,
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'task_stats': task_stats,
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})
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return super().changelist_view(request, extra_context)
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# 注册管理类
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admin.site.register(Website, WebsiteAdmin)
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admin.site.register(Article, ArticleAdmin)
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# 自定义管理站点标题
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admin.site.site_header = 'Green Classroom 管理系统'
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admin.site.site_title = 'Green Classroom'
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admin.site.index_title = '欢迎使用 Green Classroom 管理系统'
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