tornado实现文件下载的代码，tornado实现文件下载,获取请求参数；请求参数生

tornado实现文件下载的代码，tornado实现文件下载,获取请求参数；请求参数生

获取请求参数；请求参数生成json格式，存入文件；下载json文件```javaclass SpockDataIntegrationDownloadHandler(tornado.web.RequestHandler): def post(self): selectname = self.get_argument('selectname') json_string = {}

    """    将请求参数放到dict中    """      type = self.get_argument('type')      starttime = self.get_argument('starttime')      endtime = self.get_argument('end_time')      json_string['starttime'] = starttime      json_string['endtime'] = endtime      json_string['type'] = type    """    生成json文件    """    if json_string:      filepath = './jsonfile.conf'      if os.path.exists(filepath):        os.remove(filepath)      ff = open(filepath, 'w')      json.dump(json_string, ff)  # 将json格式数据写入文件      ff.close()      """      下载文件      """      filename = "jsonfile.conf"      self.set_header ('Content-Type', 'application/octet-stream')      self.set_header ('Content-Disposition', 'attachment; filename=' + filename)      buf_size = 4096      with open(os.path.join('',filepath), 'rb') as f:        while True:          data = f.read(buf_size)          if not data:            break          self.write(data)      self.finish()

```