LinkedIn Gem Ruby: OAuth (permission_unknown) - ruby

Question

I am trying to use the LinkedIn gem to access LinkedIn. I can't seem to get past getting access.
My code is this:
#client = LinkedIn::Client.new(API_KEY, SECRET)
#rtoken = client.request_token.token
#rsecret = client.request_token.secret
puts "token: #{#rtoken} secret #{#rsecret}"
#authorize_url = client.request_token.authorize_url
puts "authorize url: #{#authorize_url}"
#pin = #authorize_url.split("oauth_token=").last.strip
puts "pin #{#pin}"
#keys = #client.authorize_from_request(#rtoken, #rsecret, #pin)
#client.authorize_from_access(#keys)
And that produces the error:
token: sdklghsdgksdghskdhg secret shdlgkshdgshsdk
authorize url: https://www.linkedin.com/uas/oauth/authorize?oauth_token=sdkghskldghsdkg
pin fslkdghskdghdsgkhsdkhg
OAuth::Problem: permission_unknown
Not really sure where to start on this. I've tried to find what permission is missing, but I'm at a loss.
Thoughts?

Answer 1

I've just started playing with this myself. I hit this same issue unless I manually paste the authorize URL into my browser, and then click Accept to allowing the requested permissions to my account. Then a pin is printed on the screen which I enter in for the authorize_from_request call.
So this line in your code is incorrect - the last part of the URL is a generated_token as the README indicates, not a pin. I'm not sure of a programmatic way to do this.
#pin = #authorize_url.split("oauth_token=").last.strip

Answer 2

I discovered the issue. It turns out request_token.authorize_url does not return the pin. It just gives you a URL to visit where you can authenticate and generate a pin. Then you'll have to copy the pin into your application. A more elegant solution is this:
puts request_token.authorize_url
puts "Access the URL above. Authenticate. Enter the PIN here:"
pin = gets.strip
access_keys = client.authorize_from_request(rtoken, rsecret, pin)
This prints the URL and directs the user to authenticate, then enter the pin into the application.