django rest框架返回文件

Question

我在views.py中有以下视图 -

class FilterView(generics.ListAPIView):
    model = cdx_composites_csv

    def get(self, request, format=None):
        vendor = self.request.GET.get('vendor')
        filename = self.request.GET.get('filename')
        tablename = filename.replace(".","_")
        model = get_model(vendor, tablename)
        filedate = self.request.GET.get('filedate')        
        snippets = model.objects.using('markitdb').filter(Date__contains=filedate)
        serializer = cdx_compositesSerializer(snippets, many=True)
        if format == 'raw':
            zip_file = open('C:\temp\core\files\CDX_COMPOSITES_20140626.zip', 'rb')
            response = HttpResponse(zip_file, content_type='application/force-download')
            response['Content-Disposition'] = 'attachment; filename="%s"' % 'CDX_COMPOSITES_20140626.zip'
            return response

        else:
            return Response(serializer.data)

它适用于xml,json,csv,但是当我尝试使用raw时,它不会返回文件,而是提供""详细信息":"未找到""为什么会发生这种情况？

我正在点击的URL如下 -

有效的json示例 -

http://dt-rpittom:8000/testfilter/?vendor=markit&filename=cdx_composites.csv&filedate=2014-06-26&format=json

这应该返回一个zip文件供下载.

http://dt-rpittom:8000/testfilter/?vendor=markit&filename=cdx_composites.csv&filedate=2014-06-26&format=raw

Answer 1

我不知道为什么我必须这样做 - 可能是Django Rest Framework内部的东西,它不允许将自定义方法放到格式上？

我只是将其更改为以下内容 -

if fileformat == 'raw':
    zip_file = open('C:\temp\core\files\CDX_COMPOSITES_20140626.zip', 'rb')
    response = HttpResponse(FileWrapper(zip_file), content_type='application/zip')
    response['Content-Disposition'] = 'attachment; filename="%s"' % 'CDX_COMPOSITES_20140626.zip'
    return response

然后在我的URL中点击新值,它工作正常.我很想知道为什么我不能使用格式来提供文件.

Answer 2

尝试使用FileWrapper:

from django.core.servers.basehttp import FileWrapper

...

if format == 'raw':
    zip_file = open('C:\temp\core\files\CDX_COMPOSITES_20140626.zip', 'rb')
    response = HttpResponse(FileWrapper(zip_file), content_type='application/zip')
    response['Content-Disposition'] = 'attachment; filename="%s"' % 'CDX_COMPOSITES_20140626.zip'
    return response
...

另外,我会用application/zip而不是application/force-download.