LinkedIn API oauth issues with sending message node.js -

i have same issue:

how post linkedin "share" node-auth?

essentially using linkedin-js npm module works great requests. using module in conjuncture passport , generating oauth token , secret. when post did not work messaging went oauth dependency library , changed content-type headers application/json , x-li-format headers json. also, other bases covered. have "w_messages" set in scope , other requests working.

i not need x-li-format header since have application/json header. thing can think of access tokens off (perhaps step missing - unlikely since other requests requiring authentication work) or plaintext signature thrown off application/json content-type (following error not thrown):

  if( signaturemethod != "plaintext" && signaturemethod != "hmac-sha1") throw new error("un-supported signature method: " + signaturemethod ) 

i went error message:

{ statuscode: 401, data: '<?xml version="1.0" encoding="utf-8" standalone="yes"?>\n<error>\n  <status>401</status>\n  <timestamp>1375876823051</timestamp>\n   <request-id>0wfu40uzp8</request-id>\n  <error-code>0</error-code>\n  <message>[unauthorized]. oau:fgb949d9gb66|427a55ea-a05e-4494-88f5-a33230bd719a|*01|*01:1375876915:wwqvtae9wqneef8ezl6yl7dmyv4=</message>\n</error>\n' } 

to error message:

{ statuscode: 401, data: '{\n  "errorcode": 0,\n  "message": "[unauthorized].  oau:fgb949d9gb66|ce1f124c-1e10-4abc-8777-55bbd9621100|*01|*01:1375913097:eh90q69mhgrwicvcknimzaunlqi=",\n   "requestid": "koyhe8k0m6",\n  "status": 401,\n  "timestamp": 1375913004009\n}' } 

here api call , corresponding oauth calls:

linkedinclient.apicall('post', '/people/~/mailbox',     {         "token": {             "oauth_token_secret": tokensecret             , "oauth_token": token         },         "mailbox-item": {"recipients": {             "values": [                 {                     "person": {                         "_path": people,                     }                 }]         },         "subject": subject,         "body": body}     }     , function (error, result) {         if (result){             req.io.emit('success', {success : "linkedin message sent successfully."});         }         console.log(error);     } );  var client = { oauth: new oauth(   'https://api.linkedin.com/uas/oauth/requesttoken' , 'https://api.linkedin.com/uas/oauth/accesstoken' , key , secret , '1.0a' , redirect , 'hmac-sha1' , null , {'accept': '*/*', 'connection': 'close', 'x-li-format': 'json', 'content-type': 'application/json'} ) }  client.oauth.post(     _rest_base + path   , token.oauth_token   , token.oauth_token_secret   , params   , 'application/json'   , requestcallback(callback)   );