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


#//python/6889