Pre-call the app on request phase for configuration hook. Closes #62

oa-core/lib/omniauth/strategy.rb

@@ -6,7 +6,7 @@ module OmniAuth
     
     def self.included(base)
       base.class_eval do
-        attr_reader :app, :name, :env, :options
+        attr_reader :app, :name, :env, :options, :response
       end
     end
      
@@ -23,6 +23,8 @@ module OmniAuth
     def call!(env)
       @env = env
       if request.path == request_path
+        status, headers, body = *call_app!
+        @response = Rack::Response.new(body, status, headers)
         request_phase
       elsif request.path == callback_path
         callback_phase

oa-core/spec/omniauth/strategy_spec.rb

@@ -3,7 +3,9 @@ require 'spec_helper'
 class ExampleStrategy
   include OmniAuth::Strategy
   def call(env); self.call!(env) end
+  attr_reader :last_env
   def request_phase
+    @last_env = env
     raise "Request Phase"
   end
   def callback_phase
@@ -38,6 +40,15 @@ describe OmniAuth::Strategy do
       end
     end
     
+    it 'should be able to modify the env on the fly before the request_phase' do
+      app = lambda{|env| env['omniauth.boom'] = true; [404, {}, ['Whatev']] }
+      
+      s = ExampleStrategy.new(app, 'test')
+      lambda{ s.call({'PATH_INFO' => '/auth/test'}) }.should raise_error("Request Phase")
+      s.response.status.should == 404
+      s.last_env.should be_key('omniauth.boom')
+    end
+    
     context 'custom paths' do
       it 'should use a custom request_path if one is provided' do
         @options = {:request_path => '/awesome'}