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Deprecated offline_access on facebook with RoR

We have a problem in our RoR application. We use facebook authentication with omniauth and make friends with Koala. But recently, when we try to show a photo of a friend, we got this error:

Koala::Facebook::APIError in Homes#show

Showing /home/daniel/Homes/app/views/shared/_event.html.erb where line #19 raised:

OAuthException: Error validating access token: Session has expired at unix time 1328727600. The current unix time is 1328802133.
Extracted source (around line #19):

16:     <img src="../assets/friends-icon.png" alt="User  profile apicture" height="33" width="43">
17:         <% if current_user %>
18:           <% event.friends_in_event(@person).each do |f| %>
19:             <%= link_to(image_tag(f.fb_picture, :size => "43x33"), person_path(f.id)) %>
20:           <% end %>
21:         <% end %>
22:       </div>

Authentication works well, but the offline_access option is already outdated on facebook, which works well, but now we have this problem. Is this any way to extend access_token ?, or is there another solution ?.

This is our omniauth.rb

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :facebook, ENV['FB_KEY'], ENV['FB_SECRET'], 
  { :scope => 'email,offline_access,user_photos,publish_stream',
    :client_options => { :ssl => { :ca_path => "/etc/ssl/certs" } } }
end

And our koala.rb

Koala.http_service.http_options = {
  :ssl => { :ca_path => "/etc/ssl/certs" }
}

Thanks in advance.

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2 answers

There are 2 solutions to this problem:

  • Extend user access token:
    • Facebook 60 . , , .
    • PHP, fooobar.com/questions/92742/....
      • API: https://graph.facebook.com/oauth/access_token?client_id=APP_ID&client_secret=APP_SECRET&grant_type=fb_exchange_token&fb_exchange_token=EXISTING_ACCESS_TOKEN
  • OAuthException :
    • Facebook PHP, dev.
    • :
      • access_token.
      • , access_token . OAuthException, https://www.facebook.com/dialog/oauth?client_id=APP_ID&redirect_uri=CALLBACK_URL
      • URL-, CALLBACK_URL code .
      • URL- code, access_token: https://graph.facebook.com/oauth/access_token?client_id=APP_ID&redirect_uri=CALLBACK_URL&client_secret=APP_SECRET&code=CODE&display=popup

dev .

( Ruby on Rails code):

ApplicationController:

rescue_from Koala::Facebook::APIError, :with => :handle_fb_exception

protected ApplicationController:

def handle_fb_exception exception
  if exception.fb_error_type.eql? 'OAuthException'
    logger.debug "[OAuthException] Either the user access token has expired, they've logged out of Facebook, deauthorized the app, or changed their password"
    oauth = Koala::Facebook::OAuth.new

    # If there is a code in the url, attempt to request a new access token with it
    if params.has_key? 'code'
      code = params['code']
      logger.debug "We have the following code in the url: #{code}"
      logger.debug "Attempting to fetch a new access token..."
      token_hash = oauth.get_access_token_info code
      logger.debug "Obtained the following hash for the new access token:"
      logger.debug token_hash.to_yaml
      redirect_to root_path
    else # Since there is no code in the url, redirect the user to the Facebook auth page for the app
      oauth_url = oauth.url_for_oauth_code :permissions => 'email'
      logger.debug "No code was present; redirecting to the following url to obtain one: #{oauth_url}"
      redirect_to oauth_url
    end
  else
    logger.debug "Since the error type is not an 'OAuthException', this is likely a bug in the Koala gem; reraising the exception..."
    raise exception
  end
end

- :

+9

, , , → . : " offline_access:"

+2

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