UnicodeDecodeError - Django 上传文件

Question

我正在使用 Django Rest Framework，并在前端使用一个简单的表单，我将一些数据和附件上传到 Django 中的模型。

我将文件存储在 AWS S3 中，并且我正在使用 Django S3 存储。

当我上传一个文件时，我得到一个 UnicodeDecodeError 如下。 （见底部的踪迹）

我的文件模型

class JourAttachment(models.Model):
    jourreport = models.ForeignKey(JourReport,related_name="jourattachments", on_delete=models.CASCADE)
    file = models.FileField(null=False)

查看

class JourReportListView(APIView):
    serializer_class = JourReportListSerializer
    permission_classes = (IsAuthenticated, )
    parser_classes = (MultiPartParser,)
    

    def post(self,request,*args, **kwargs):
        
        user_making_request = request.user
        if not user_is_admin(user_making_request):
            return UserNotAdminResponse()

        attachments = request.FILES.getlist('attachment', None)
        
        serializer = JourReportCreateUpdateSerializer(data=request.data,partial=True,context={'attachments': attachments})
        valid = serializer.is_valid(raise_exception=True)
        if valid:
            report = serializer.save()
            
            status_code = status.HTTP_201_CREATED
 
            #send_mail_with_jourreport(report)
            return SuccessfulResponse(data=request.data, message="Jour report successfully registered!" ,status_code=status_code)
    
        return ErrorResponse()

序列化器

class JourReportCreateUpdateSerializer(serializers.ModelSerializer):
    class Meta:
        model = JourReport
        fields = ('apartment_number', 'address', 'tenant_name','tenant_phone', 'debit_tenant','worker','total_hours', 'additional_workers','defect_description','actions_made','actions_to_be_made')

    

    def create(self, validated_data):
        users = []
        attachments = self.context['attachments']
        if "additional_workers" in validated_data:
            users = [w.id for w in validated_data["additional_workers"]]
            del validated_data["additional_workers"]
        
        report = JourReport.objects.create(**validated_data)
        
        for a in attachments:
            
            JourAttachment.objects.create(file=a,jourreport=report) # Add attachments to instance

        if(len(users) > 0):
            report.additional_workers.add(*users)

        return report

模型已正确添加并存储了所有文件，但无论哪种方式，我都会收到 UnicodeDecodeError 的 500 响应 追踪

Traceback (most recent call last):
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/django/core/handlers/base.py", line 145, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/django/core/handlers/base.py", line 143, in _get_response
    response = response.render()
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/django/template/response.py", line 105, in render
    self.content = self.rendered_content
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/rest_framework/response.py", line 70, in rendered_content
    ret = renderer.render(self.data, accepted_media_type, context)
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/rest_framework/renderers.py", line 100, in render
    ret = json.dumps(
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/rest_framework/utils/json.py", line 25, in dumps
    return json.dumps(*args, **kwargs)
  File "/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/__init__.py", line 234, in dumps
    return cls(
  File "/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/Users/jakobkarlstrand/Documents/Programming/weknowit/HaningeBostader/backend/venv/lib/python3.9/site-packages/rest_framework/utils/encoders.py", line 50, in default
    return obj.decode()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa2 in position 50: invalid start byte

我还有一个自定义 S3 存储处理程序：

class CustomS3Storage(S3Storage,ABC):

    def _save(self, name, content):
        """
        We create a clone of the content file as when this is passed to boto3 it wrongly closes
        the file upon upload where as the storage backend expects it to still be open
        """
        # Seek our content back to the start
        content.seek(0, os.SEEK_SET)

        # Create a temporary file that will write to disk after a specified size
        content_autoclose = self.new_temporary_file()

        # Write our original content into our copy that will be closed by boto3
        
        content_autoclose.write(content.read().strip())
        content_autoclose.file = content.file


        # Upload the object which will auto close the content_autoclose instance
        result = super()._save(strip_non_ascii(name), content_autoclose)

        # Cleanup if this is fixed upstream our duplicate should always close
        if not content_autoclose.closed:
            content_autoclose.close()
        

        return result

Answer 1

问题出在响应中：

return SuccessfulResponse(data=request.data,message="Jour report successfully registered!" ,status_code=status_code)

我正在返回包含文件的请求数据，这会引发错误。 删除它，或者先序列化以消除错误