python - 类型错误 : 'NoneType' object is not subscriptable followed by AttributeError: 'NoneType' object has no attribute 'split'

Question

使用 Django。我有以下模型:

class Postagem(models.Model):
id = models.AutoField(primary_key=True, editable=False)
descricao = models.CharField(max_length=50)
area = models.ForeignKey('core.Area', null=True)
user = models.ForeignKey('User')
categoria = models.CharField(max_length=50, null=True)
post = models.FileField(upload_to='posts/', null=True)
thumbnail = models.FileField(upload_to='posts/', null=True)


def __str__(self):
    return self.descricao

以下形式:

class PostForm(forms.ModelForm):
categoria = forms.ChoiceField(choices=[("Video","Vídeo"),("Audio","Aúdio"),("Imagem","Imagem"),("Musica","Música")], required=True)
thumbnail = forms.FileField(required=False)

class Meta:
    model = Postagem
    fields = ['descricao', 'area', 'user', 'post']

查看:

def profileView(request):
context = getUserContext(request)

if request.method == 'POST':
    exception=None
    userDict = {}
    userDict["user"] = context["user"].id    
    if "categoria" in request.POST:
        newPost = request.POST.copy()
        newPost.update(userDict)
        form = PostForm(newPost,request.FILES)
        print("postform POST: ",newPost, " File ",request.FILES)
        if form.is_valid():
            print("valid")
            try:
                form.save()
                print("saved")
                return HttpResponseRedirect(reverse_lazy('accounts:profile'))
            except IntegrityError as e:
                print("Integrity Error")
                exception=e            
        else:
            print("PostForm error")
            print(form.errors)

    form.non_field_errors=form.errors
    if exception is not None:
        form.non_field_errors.update(exception)
    context['form']=form

posts = Postagem.objects.get_queryset().order_by('id')
paginator = Paginator(posts, 12)
page = request.GET.get('page')
context["areas"] = Area.objects.all()   
try:
    posts = paginator.page(page)
except PageNotAnInteger:
    # If page is not an integer, deliver first page.
    posts = paginator.page(1)
except EmptyPage:
    # If page is out of range (e.g. 9999), deliver last page of results.
    posts = paginator.page(paginator.num_pages)

context["posts"]=posts

return render(
    request,
    'accounts/profile.html',
    context
)

最后是模板:

 {% for post in posts %}
        {% if forloop.counter0|divisibleby:4 or forloop.counter0 == 0 %}    
        <div id="grid-profile" class="row grid">
            <div class="col-md-1"></div>
        {% endif %}

            {% ifnotequal post.categoria "Imagem"%}
            <iframe id=post{{forloop.counter}} width="420" height="315"
                src={{post.post.url}}>
            </iframe>
            {% else %}
            <div class="col-md-2">
                <button type="button" id="modal1trigger" data-toggle="modal" data-target="#modal1"><img class="img-responsive" src={{post.post.url}}></img></button>
            </div>
            {% endifnotequal %}

        {% if forloop.counter|divisibleby:4 or forloop.counter == posts|length %} 
            <div class="col-md-1"></div>
        </div>
        {% endif %}
        {% endfor %}
        <div class="pagination">
            <span class="step-links">
                {% if posts.has_previous %}
                    <a href="?page={{ posts.previous_page_number }}">previous</a>
                {% endif %}

                <span class="current">
                    Page {{ posts.number }} of {{ posts.paginator.num_pages }}.
                </span>

                {% if posts.has_next %}
                    <a href="?page={{ posts.next_page_number }}">next</a>
                {% endif %} 
            </span>
        </div>

我剪了一些模板...不管怎样，我希望能够添加各种帖子。歌曲、视频、图像、文档等。它正在运行。帖子正在添加中。但是，我有一个反复出现的错误，我不知道为什么。那可能非常危险，所以我开始研究它，但没有找到可接受的答案。 错误仅在尝试获取歌曲或视频时发生。

    [21/Sep/2017 23:32:44] "GET /media/posts/13567830_1641362072853439_1924036772_n.mp4 HTTP/1.1" 200 1171456
Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 279, in write
    self._write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 453, in _write

    result = self.stdout.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
ConnectionResetError: [WinError 10054] Foi forçado o cancelamento de uma conexão existente pelo host remoto
[21/Sep/2017 23:32:44] "GET /media/posts/13567830_1641362072853439_1924036772_n.mp4 HTTP/1.1" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 53113)
Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 279, in write
    self._write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 453, in _write

    result = self.stdout.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
ConnectionResetError: [WinError 10054] Foi forçado o cancelamento de uma conexão existente pelo host remoto

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 141, in run
    self.handle_error()
  File "C:\Users\eduardo\Envs\ProExC\lib\site-packages\django\core\servers\basehttp.py", line 88, in handle_erro
r
    super(ServerHandler, self).handle_error()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 368, in handle
_error
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 331, in send_h
eaders
    if not self.origin_server or self.client_is_modern():
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 344, in client
_is_modern
    return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 639, in process_re
quest_thread
    self.finish_request(request, client_address)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 361, in finish_req
uest
    self.RequestHandlerClass(request, client_address, self)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 696, in __init__
    self.handle()
  File "C:\Users\eduardo\Envs\ProExC\lib\site-packages\django\core\servers\basehttp.py", line 155, in handle
    handler.run(self.server.get_app())
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 144, in run
    self.close()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\simple_server.py", line 35, in cl
ose
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------
[21/Sep/2017 23:32:44] "GET /media/posts/03_-_The_Mute.mp3 HTTP/1.1" 200 1179648
Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 279, in write
    self._write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 453, in _write

    result = self.stdout.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
ConnectionResetError: [WinError 10054] Foi forçado o cancelamento de uma conexão existente pelo host remoto
[21/Sep/2017 23:32:44] "GET /media/posts/03_-_The_Mute.mp3 HTTP/1.1" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 53114)
Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 279, in write
    self._write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 453, in _write

    result = self.stdout.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
ConnectionResetError: [WinError 10054] Foi forçado o cancelamento de uma conexão existente pelo host remoto

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 141, in run
    self.handle_error()
  File "C:\Users\eduardo\Envs\ProExC\lib\site-packages\django\core\servers\basehttp.py", line 88, in handle_erro
r
    super(ServerHandler, self).handle_error()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 368, in handle
_error
    self.finish_response()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 180, in finish
_response
    self.write(data)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 331, in send_h
eaders
    if not self.origin_server or self.client_is_modern():
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 344, in client
_is_modern
    return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 639, in process_re
quest_thread
    self.finish_request(request, client_address)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 361, in finish_req
uest
    self.RequestHandlerClass(request, client_address, self)
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\socketserver.py", line 696, in __init__
    self.handle()
  File "C:\Users\eduardo\Envs\ProExC\lib\site-packages\django\core\servers\basehttp.py", line 155, in handle
    handler.run(self.server.get_app())
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\handlers.py", line 144, in run
    self.close()
  File "c:\users\eduardo\appdata\local\programs\python\python36-32\Lib\wsgiref\simple_server.py", line 35, in cl
ose
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
---------------------------------------

编辑:

使用 Django 1.11.3， window 10，经过 Opera 和 Chrome 测试，使用 gulp 运行服务器

**编辑2:**

嘿，如果 html 中有 iframe 标记，错误只会发生!!

Answer 1

看来这是一个 python 错误:

Django 票:https://code.djangoproject.com/ticket/26995 python 票:https://bugs.python.org/issue14574

还没有设法解决，如果可以的话我会编辑这个答案详细解释如何解决它。

编辑

这似乎是 chrome 上的错误。我没有想到，因为我正在使用 Opera，但 Opera 也使用 Chromium。在 Internet Explorer 中没有显示错误。

https://code.djangoproject.com/ticket/21227#no1

这是错误跟踪器