python - 渲染抛出错误 AttributeError META -(异常位置 : __getattr__ in urllib2)

Question

我关注了this文章尝试从外部网站加载图像。我正在尝试从外部链接中提取所有图像。我已经使用 BeautifulSoup 来解析链接并获取所有必需的链接。

在 View 调用代码末尾的 render() 函数之前，image_list 和 return_dict 具有所需的值。但是，渲染函数似乎正在生成 AttributeError 异常。请协助。

我收到以下错误:

    AttributeError at /post/add_new/
    META
    Request Method: POST
    Request URL:    http://localhost:8000/post/add_new/
    Django Version: 1.4.1
    Exception Type: AttributeError
    Exception Value:    
    META
    Exception Location: C:\Python27\lib\urllib2.py in __getattr__, line 225
    Python Executable:  C:\Python27\python.exe
    Python Version: 2.7.3
    Python Path:    
    ['C:\\Users\\Talal\\Python Workspace\\talal_ynd',
     'C:\\Python27\\lib\\site-packages\\ipython-0.13-py2.7.egg',
     'C:\\Python27\\lib\\site-packages\\pyreadline-2.0_dev1-py2.7-win32.egg',
     'C:\\Python27\\lib\\site-packages\\pil-1.1.7-py2.7-win32.egg',
     'C:\\Python27\\lib\\site-packages\\setuptools-0.6c11-py2.7.egg',
     'C:\\windows\\system32\\python27.zip',
     'C:\\Python27\\DLLs',
     'C:\\Python27\\lib',
     'C:\\Python27\\lib\\plat-win',
     'C:\\Python27\\lib\\lib-tk',
     'C:\\Python27',
     'C:\\Python27\\lib\\site-packages']
    Server time:    Thu, 13 Sep 2012 17:30:45 +0500

这是我的 View 文件:

# Create your views here.
from django.shortcuts import render
from django.http import HttpResponseRedirect
from posts.models import Post, PostForm
from django.template.loader import get_template
from talal_ynd.settings import TEMPLATE_DIRS


def post_view(request):
    if request.method == 'POST':
        post_form = PostForm(request.POST)
        if post_form.is_valid():
            success_message = 'Thank you.'

            link = post_form.cleaned_data['link']
            if 'get_link' in request.POST:
                import urllib2
                request = urllib2.Request(link)
                response = urllib2.urlopen(request)
                html=response.read()
                from BeautifulSoup import BeautifulSoup
                soup=BeautifulSoup(html)
                import re
                title=''; description=''
                description=soup.findAll('meta',
                    attrs={'name':re.compile("description$",
                        re.I)})[0].get('content')
                try: 
                    title=soup.findAll('meta',
                        attrs={'name':re.compile("^title$",re.I)})[0].get('content')
                except:
                    pass
                if not title:
                    title=soup.title.string
                max_images=10
                image_tags=soup.findAll('img',limit=max_images)
                image_urls_list=[]
                image_urls_list2=[]
                from urlparse import urljoin
                for image_tag in image_tags:
                    url=image_tag.get('src')
                    #image_urls_list.append(request.build_absolute_uri(url))#urljoin(link,url))#HttpRequest.build_absolute_uri(url))
                    #image_urls_list.append(request.urljoin(link,url))
                    image_urls_list.append(url)
                image_list=[]
                for url in image_urls_list:
                    image_list.append({'url':url})
                return_dict={'title':title, 'description':description}
                return_dict.update({'images':image_list})

            else:
                post_form = PostForm()
    else:

        post_form = PostForm()


    return render(request, 'posts/post_form.html', locals())

Answer 1

您已经覆盖了函数内的 request 变量，因为您在调用 urllib2.Request 时重用了它。在那里使用不同的变量名称。