python - How does tornado post xml data when using AsyncHTTPClient? -


i use tornado 4.2 , need send xml data post request. if use requests library it's working expected:

 r = requests.post(url, headers=headers, data=send_xml, verify=false)  prepay_result_dic = cls.trans_xml_to_dict(r.content)

how can achieve same functionality tornado.httpclient.asynchttpclient? i've tried:

@tornado.gen.coroutine def post_async_url(url, payload={}, headers={}):     '''     post url，to replace requests lib...     :param url: "http://www.google.com/"     :param payload: {'userid': user_id}     :return: response.body     '''     import urllib     http_client = tornado.httpclient.asynchttpclient()     payload = urllib.urlencode(payload)     response = yield tornado.gen.task(http_client.fetch, url, method="post", headers=headers, body=payload, validate_cert=false)     raise tornado.gen.return(response.body)

but above code raises error:

typeerror: not valid non-string sequence or mapping object

this error isn't coming tornado, it's coming urllib.urlencode, , can happen when try call function on string instead of dict. comments indicate payload supposed dict, since question asking xml, payload string instead? if so, can pass directly body of request, without url-encoding it.


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