django 下载文件

方法一、

from django.http import StreamingHttpResponse 

def big_file_download(request):   

 # do something...    

    def file_iterator(file_name, chunk_size=512):        

        with open(file_name) as f:            

            while True:                

                c = f.read(chunk_size)                

                    if c:                    

                        yield c                

                    else:                    

                        break   

    the_file_name = "file_name.txt"   

    response = StreamingHttpResponse(file_iterator(the_file_name))    

    return response
 

方法二、

　csv格式

#urls.py

url(r'download/(?P<FILE>.*)$', views.DownLoadView.as_view(), name='download'),



#views.py

class DownLoadView(View):

    def get(self, request, FILE):

        file_path = STATICFILES_DIRS[0] +"/"+FILE

        response = HttpResponse(content_type="text/csv") 

        response['Content-Disposition'] = 'attachment; filename=%s' %FILE

        response['Content-Length'] = os.path.getsize(file_path) 

        data = csv.reader(file(file_path, 'rb'))

        writer = csv.writer(response)

        for item in data:

           writer.writerow(item) 

        return response

　　

方法三、

#urls.py

url(r'loadkml/(.*)$', 'django.views.static.serve', {'document_root':settings.DOWNLOAD_DIR}, name='loadkml'),



#settings.py

DOWNLOAD_DIR = os.path.join(BASE_DIR, "data").replace('\', '/')