def get(self):
'''
get????
'''
echo_str = self.get_argument('echostr', default='_ARG_DEFAULT')
# ????????
if echo_str.strip() != '_ARG_DEFAULT':
self.write(echo_str)
else:
htmp_file_name = self.get_argument(request_params.KEY_REQ_GET_HTML_FILE_NAME, default='_ARG_DEFAULT')
# ??????
if htmp_file_name == '_ARG_DEFAULT':
self.write('this is a tornador web server!')
else:
# ????html????
get_process_rst = yield self.get_thread(htmp_file_name)
self.render(get_process_rst)
# self.finish()
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