Posting yammer feeds from SharePoint 2010 webpart

Hi All,

 

I've SharePoint 2010 document library, it contains lots of ASPX pages, a SP2010 web part will be available to view those pages and its description like image carousel/add rotator, as off now the user can able to like and comment on it. I would like to add another button called "Post to Yammer&Slack", when the button is clicked the page has to posted into yammer and slack.  

 

My Thoughts on yammer

• when the buttton clicked, get the access token for the current logged user, without navigating to the yammer login page.
• After successful authentication, post the page into yammer.

Questions on yammer

• what is the best method?(sever side flow)
• .Net 3.5 will be supported for this (my solution will be developed into .net 3.5)

 Your thoughts are welcome, share some good reference for server side flow.

Thanks in advance.