Django的Httpresponse對(duì)象允許將迭代器作為傳入?yún)?shù)。StreamingHttpResponse對(duì)象取代HttpRseponse對(duì)象，更適合與文件下載。服務(wù)器上的文件已經(jīng)通過文件流傳輸?shù)綖g覽器上，單文件流會(huì)一亂碼的方式顯示在瀏覽器中，而不是下載在硬盤中，可以給StreamHttpResponse對(duì)象的Content_type 和 Content_Disposition字段賦值 Content_type :http://tool.oschina.net/commons(指明文件的格式)
當(dāng)文件為多個(gè)文件是自動(dòng)生成zip格式的壓縮包

from django.http import StreamingHttpResponse
def big_file_download(request):
   def file_iterator(file_name, chunk_size=512):    
      with open('static/app/app.apk') as f:       
           while True:            
                c = f.read(chunk_size)            
                if c:                
                      yield c            
                else:                
                      break
  the_file_name = "big_file.apk"
  response = StreamingHttpResponse(file_iterator(the_file_name))
  response['Content-Type'] = 'application/application/vnd.android.package-archive'
  response['Content-Disposition'] = 'attachment;filename="  {0}"'.format(the_file_name)
  return response