门卫/ oauth /令牌 - 空白响应

Question

I have a front-end in AngularJS and back-end in RoR with Devise + Doorkeeper + RocketPants. For now I have properly working CORS, I can succesfully get json responses from my API (if I turn off doorkeeper protection). But now I'm trying to implement user password credentials flow:

On doorkeeper:

  resource_owner_from_credentials do |routes|
    request.params[:user] = {:email => request.params[:username], :password => request.params[:password]}
    request.env["devise.allow_params_authentication"] = true
    request.env["warden"].authenticate!(:scope => :user)
  end

On angularjs (src: nils-blum ):

var payload = "username="+username+"&password="+password+"&" +
        "client_id="+client_id+"&client_secret="+client_secret+
        "&grant_type=password"

$http({method: 'POST',
    url: scope.booksh_server + '/oauth/token',
    data:   payload,
    headers: {'Content-Type':'application/x-www-form-urlencoded'}
    }
).success(function (data) {
            tokenHandler.set(data.access_token);
            scope.$broadcast('event:authenticated');
});

Note: Nils's approach uses payload as object with params, not a string. In my case it gives me POST with payload, not with FORM params, and thus not working.

When I enter wrong user/password, rails log says:

    Started POST "/oauth/token" for 127.0.0.1 at 2013-11-22 15:21:08 +0400
  Doorkeeper::Application Load (0.5ms)  SELECT "oauth_applications".* FROM "oauth_applications" WHERE "oauth_applications"."uid" = '981d6d654f5e709b2ca3437401c993a6d09cc91cc3fb16b8e2b3191e6421029c' AND "oauth_applications"."secret" = 'f92c4ec969525352bd03ec1eb810a9952cd0814d37ce5b2b02e8a928b2561e10' ORDER BY "oauth_applications"."id" ASC LIMIT 1
  User Load (0.9ms)  SELECT "users".* FROM "users" WHERE "users"."email" = 'undefined' ORDER BY "users"."id" ASC LIMIT 1

Chrome dev tools show this request as cancelled. Firebug shows empty response with 302 Found status. When I perform same POST from chrome REST App , UPD: server does the same, and I get 302 Found and then it's redirected to sign_in page of devise.

Moreover, if I enter correct user/password, firefox shows empty response with 200 OK, REST receives proper json with access token, and chrome shows cancelled response and throws CORS error:

XMLHttpRequest cannot load http://0.0.0.0:3000/oauth/token. Origin http://0.0.0.0:9000 is not allowed by Access-Control-Allow-Origin. 

Server log:

Started POST "/oauth/token" for 127.0.0.1 at 2013-11-22 15:33:22 +0400
  Doorkeeper::Application Load (0.5ms)  SELECT "oauth_applications".* FROM "oauth_applications" WHERE "oauth_applications"."uid" = '981d6d654f5e709b2ca3437401c993a6d09cc91cc3fb16b8e2b3191e6421029c' AND "oauth_applications"."secret" = 'f92c4ec969525352bd03ec1eb810a9952cd0814d37ce5b2b02e8a928b2561e10' ORDER BY "oauth_applications"."id" ASC LIMIT 1
  User Load (0.5ms)  SELECT "users".* FROM "users" WHERE "users"."email" = '123@gmail.com' ORDER BY "users"."id" ASC LIMIT 1
   (0.2ms)  BEGIN
  SQL (0.4ms)  UPDATE "users" SET "last_sign_in_at" = $1, "current_sign_in_at" = $2, "sign_in_count" = $3, "remember_token" = $4, "updated_at" = $5 WHERE "users"."id" = 1  [["last_sign_in_at", Fri, 22 Nov 2013 11:32:49 UTC +00:00], ["current_sign_in_at", Fri, 22 Nov 2013 11:33:23 UTC +00:00], ["sign_in_count", 24], ["remember_token", "N5sRI6vE7B6vRNUlih3G2Q"], ["updated_at", Fri, 22 Nov 2013 11:33:23 UTC +00:00]]
   (17.5ms)  COMMIT
   (1.6ms)  BEGIN
  Doorkeeper::AccessToken Exists (0.3ms)  SELECT 1 AS one FROM "oauth_access_tokens" WHERE "oauth_access_tokens"."token" = '72dd81fd85b638fb14f9d081193b1eda0e58f85d6820718ab635fe195c36a689' LIMIT 1
  SQL (0.3ms)  INSERT INTO "oauth_access_tokens" ("application_id", "created_at", "expires_in", "resource_owner_id", "scopes", "token") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["application_id", 1], ["created_at", Fri, 22 Nov 2013 11:33:23 UTC +00:00], ["expires_in", 7200], ["resource_owner_id", 1], ["scopes", ""], ["token", "72dd81fd85b638fb14f9d081193b1eda0e58f85d6820718ab635fe195c36a689"]]
   (28.1ms)  COMMIT

How can I make this work? I need POST /oauth/token to process authentication and respond with access_token in case email/password were correct. Any help is appreciated, I'm tired of being stuck at this )

Answer 1

Yay! Finally I made it work. Still dunno why in tutorials all over the web it's much easier.

So, where the problem comes from: in my ApplicationController (root one, not the one that handles API) I had following for CORS:

  before_filter :set_headers

  def set_headers
    headers['Access-Control-Allow-Origin'] = 'http://0.0.0.0:9000'
    headers['Access-Control-Allow-Methods'] = 'GET, POST, PATCH, PUT, DELETE, OPTIONS, HEAD'
    headers['Access-Control-Allow-Headers'] = '*,X-Requested-With,Content-Type,If-Modified-Since,If-None-Match'
    headers['Access-Control-Max-Age'] = '86400'
  end

Digging into the problem I've found that this function is not called when I call /oauth/token but is called when I go to any other route outside of API which is processed with ApplicationController

Doorkeeper has its own controllers independent from your app controller. Docs describes changing of their behavior well ( link ), so here is what helped me:

routes.rb:

use_doorkeeper do
    controllers tokens: 'custom_tokens'
end

custom_tokens_controller.rb:

class CustomTokensController < Doorkeeper::TokensController

  include AbstractController::Callbacks
  before_filter :set_headers

  def set_headers
    puts 'headers set'
    headers['Access-Control-Allow-Origin'] = 'http://0.0.0.0:9000'
    headers['Access-Control-Allow-Methods'] = 'GET, POST, PATCH, PUT, DELETE, OPTIONS, HEAD'
    headers['Access-Control-Allow-Headers'] = '*,X-Requested-With,Content-Type,If-Modified-Since,If-None-Match'
    headers['Access-Control-Max-Age'] = '86400'
  end
end

Important thing is to include Callbacks into controller, as Doorkeeper controllers are inherited from Metal , so without inclusion rails can't find before_filter .

It looks good now: It authenticates my user/password pair, and returns access_token (I hope, it works :D ). If something is wrong, now there should come redirect. This is the problem which I know solution to (custom warden failure), so everything is OK now. Huh! It was long... If anyone knows why internet-based recipes didn't help, please post your thoughts =)