oahth_token is access-token got from yahoo. oauth_signature is access-token-secret got from yahoo, and has encrypt using sha1.
I got the error return from yahoo:
<yahoo:description>Please provide valid credentials. OAuth oauth_problem="unable_to_determine_oauth_type", realm="yahooapis.com"</yahoo:description>
what "unable_to_determine_oauth_type" means here?, encrypted access-token-secrect is not right? how server side encrypt? I used general encrypt, not use any key.
also, after I pass this step, how to make a api call, say call "getuserData", do I need to this "oauth-header" + params needed for this api? or just params for this api. Why all examples of yahoo mail api is SOAP? not JSON?