Yammer API - Posting to External Networks - rest

Question

I've used the Yammer API extensively for accessing current users internal network. All API calls have been working correctly (GET's and POST's) with the original token extracted from;
"https://www.yammer.com/oauth2/access_token.json?client_id={App ID}&client_secret={App Secret}&code={Access Code}"
and using the headers; "Authorization : Bearer {Token}" and "Cookie : {Cookies Received from HTML request}.
I've gotten the tokens for all accessible networks using;
"https://www.yammer.com/api/v1/oauth/tokens.json".
Accessing external networks beyond this point has proved troublesome. I changed the header to "Authorization : Bearer {NetworkToken}". While I am able to GET details from external networks, I cannot POST to external networks. I always receive a '401 Unauthorized' response. The 'Unauthorized' requests include deleting messages and liking messages in external networks.
Is there another step between being able to read data from an external network and enabling POST methods?
If I could get any insight into this i'd be extremely grateful!
Cheers!

Answer 1

When accessing external networks, you need to set the authToken to the authToken for that external network.
Step 1 - Get all auth tokens:
yam.platform.request({
url: "oauth/tokens.json",
type: 'GET',
success: function (msg) {
accessTokens = msg;
/....
},
error: function (msg) {
console.log(msg);
error(msg);
}
Step 2: Set the authToken to the correct external network
var currentToken = "";
$.each(accessTokens, function (i,val) {
if (val.network_permalink == $.cookie('networkPermalink')) {
currentToken = val;
}
});

Answer 2

While I was working on a project last month, I used the following way to post message.
The message has to be Byte encrypted in UTF-8 format.
Specify the content type as "application/x-www-form-urlencoded".
So, an example code would be:
HttpWebRequest a = (HttpWebRequest)WebRequest.Create(postUrl);
a.Headers.Add("Authorization", "Bearer" + authToken);
a.Method = "POST";
byte[] message = Encoding.UTF8.GetBytes("body=" + message + "&replied_to_id=" + threadID);
a.ContentType = "application/x-www-form-urlencoded";
a.ContentLength = message.Length;
using (var postStream = request.GetRequestStream())
{
postStream.Write(message, 0, message.Length);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (var postStreamForResponse = response.GetResponseStream())
{
StreamReader postReader = new StreamReader(postStreamForResponse);
string results = postReader.ReadToEnd();
postReader.Close();
}

Answer 3

I've discovered quite a few inconsistencies quirks with the Yammer API. I've figured out external networks in their totality now. Here are some things that may not be clear;
When doing a POST or DELETE request, do not include the network_permalink in the url! Only include the network_permalink when you're doing a GET request. This was my main issue.
Required request headers;
Content-Type : application/x-www-form-urlencoded
Accept : application/json
Cookie : _workfeed_session_id=(A code that can be extracted from the response from your first request with an auth token)
Authorization : Bearer (Access token for whichever network you wish to access)
Oh and just FYI, to request threads within the 'All Company' group this is the url; https://www.yammer.com/(network_permalink)/api/v1/messages/general.json
Thanks for the answers!