Django中实现点击图片链接强制直接下载的方法

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