Rails: Could not authenticate you from Facebook because "Invalid credentials" - facebook

Question

I integrated omniauth-facebook using https://github.com/plataformatec/devise/wiki/OmniAuth%3a-Overview. But I am getting error of :
Could not authenticate you from Facebook because "Invalid credentials".
And in logs, getting this:
Authentication failure! invalid_credentials: OAuth2::Error, : {"error":{"message":"This authorization code has been used.","type":"OAuthException","code":100}}
I have devise installed. When i click on facebook sign in link, it comes back to devise sign "www.mealnut.com/user/sign_in#=" and gives above error. I checked the solution for "Invalid credentials" on https://github.com/plataformatec/devise/wiki/OmniAuth%3a-Overview and as mentioned there, my app is header set for App Type = Web. Not getting why it is not working.
Also my app is pending review from facebook. But i don't think it is related to this error. Following are the things i did for omniauth-facebook:
Gemfile contains:
gem "omniauth", "~> 1.1.4"
gem 'omniauth-facebook', '1.4.1'
In user model, added:
devise :omniauthable, :omniauth_providers => [:facebook]
attr_accessible :provider, :uid
def self.find_for_facebook_oauth(auth, signed_in_resource=nil)
user = User.where(:provider => auth.provider, :uid => auth.uid).first
unless user
user = User.create(name:auth.extra.raw_info.name,
provider:auth.provider,
uid:auth.uid,
email:auth.info.email,
password:Devise.friendly_token[0,20]
)
end
user
end
devise.rb
require "omniauth-facebook"
config.omniauth :facebook, "APP_ID", "APP_SECRET", :scope => "offline_access, email"
omniauth.rb:
OmniAuth.config.logger = Rails.logger
Rails.application.config.middleware.use OmniAuth::Builder do
provider :facebook, ENV['FACEBOOK_KEY'], ENV['FACEBOOK_SECRET'], {:provider_ignores_state => true}
end
route.rb:
devise_for :user, :controllers => { :omniauth_callbacks => "omniauth_callbacks" }
Omniauth controller:
class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
def facebook
#user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user)
if #user.persisted?
sign_in_and_redirect #user, :event => :authentication #this will throw if #user is not activated
set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format?
else
session["devise.facebook_data"] = request.env["omniauth.auth"]
redirect_to new_user_registration_url
end
end
end
Can anybody help in this?

Answer 1

Thought I'd chip in here since this came up for me when trying to search for a solution for Could not authenticate you from Facebook because “Invalid credentials”
The problem is with Facebook API version >=2.3 you need to set {token_params: {parse: :json}} to your provider config.
devise.rb
config.omniauth :facebook,
APP_ID,
APP_SECRET,
token_params: { parse: :json } # <----- this line is NB
Answer found on this issue for omniauth-oauth2
UPDATE Aug 2018: The "invalid credentials" issue reoccurred, I had to remove the token_params setting for it to work again - so this may not be an issue anymore

Answer 2

Got it working!
My routes.rb and user.rb were wrong. And changed omniauth.rb too! Here are the previous and after files:
My routes.rb was:
devise_for :user, controllers: { registration: "registration" }
devise_for :user, controllers: { omniauth_callbacks: "omniauth_callbacks" }
So it was calling devise twice. I changed it to:
devise_for :user, controller: { registration: "registration", omniauth_callbacks: "omniauth_callbacks" }
Changed my omniauth.rb from this:
OmniAuth.config.logger = Rails.logger
Rails.application.config.middleware.use OmniAuth::Builder do
provider :facebook, ENV['FACEBOOK_KEY'], ENV['FACEBOOK_SECRET'], provider_ignores_state: true
end
to this:
OmniAuth.config.logger = Rails.logger
Also, i defined method def self.find_for_facebook_oauth(auth, signed_in_resource=nil) outside user.rb model (major mistake).
So got it working perfectly now :-)
Hope this helps someone.

Answer 3

Got it working too :)
We don't need to add this code in omniauth.rb
Rails.application.config.middleware.use OmniAuth::Builder do
provider :facebook, ENV['FACEBOOK_KEY'], ENV['FACEBOOK_SECRET']
end
if we already declare it in devise.rb
require "omniauth-facebook"
config.omniauth :facebook, "APP_ID", "APP_SECRET"

Answer 4

It helped me to solve a similar problem:
Note: v2.0.1 has an issue with callback url error. You need to add a callback url on config.
config.omniauth :facebook, "APP_ID", "APP_SECRET",
callback_url: "CALLBACK_URL"
https://github.com/plataformatec/devise/wiki/OmniAuth%3a-Overview

Answer 5

Upgrading gem to 4.0.0 and adding require "omniauth-facebook" to devise.rb fixed this for me.

Answer 6

I stack with this problem and no one advice was help me.
Problem was in redirect_uri. Devise omniauth gems generated it without https.
Finally resolved this by two steps:
Add force_ssl for rails.
Do not forget to add proxy_set_header X-Forwarded-Proto https; for nginx config, if you are using it.