def Download(request):
 def readFile(fn, buf_size=262144):
 f = open(fn, "rb")
 while True:
 c = f.read(buf_size)
 if c:
 yield c
 else:
 break
 f.close()
 filename = '/usr/local/1.jpg'
 try:
 response = HttpResponse(readFile(file),mimetype='application/octet-stream')
 response['Content-Disposition'] = 'attachment; filename=%s' %'附件'
 except:
 response = HttpResponse('')
 return response