http post 返回application/octet-stream;charset=UTF-8

inbl={} **json
httpObj = createobject("Msxml2.serverXMLHTTP")
httpObj .open("POST",postDataUrl,.f.)
httpObj .setRequestHeader("Content-Type","application/json")
httpObj .setRequestHeader("APIkey","dbc19bce-55fa-4d27-93dd-93f4fe07f274")
httpObj .send(inbl)
ww = httpObj .ResponseText

ww返回一个文件流，application/octet-stream

求教，VFP中怎么接收转存文件？？？