Recognize and raise an exception on 405 Method Not Allowed responses. Closes #7692.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6864 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activeresource/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Recognize and raise an exception on 405 Method Not Allowed responses.  #7692 [Josh Peek]
+
 * Handle string and symbol param keys when splitting params into prefix params and query params.
 
     Comment.find(:all, :params => { :article_id => 5, :page => 2 }) or Comment.find(:all, :params => { 'article_id' => 5, :page => 2 })

activeresource/lib/active_resource/connection.rb

@@ -24,6 +24,13 @@ module ActiveResource
 
   class ServerError < ConnectionError;  end  # 5xx Server Error
 
+  # 405 Method Not Allowed
+  class MethodNotAllowed < ClientError
+    def allowed_methods
+      @response['Allow'].split(',').map { |verb| verb.strip.downcase.to_sym }
+    end
+  end
+
   # Class to handle connections to remote services.
   class Connection
     attr_reader :site
@@ -99,6 +106,8 @@ module ActiveResource
             response
           when 404
             raise(ResourceNotFound.new(response))
+          when 405
+            raise(MethodNotAllowed.new(response))
           when 409
             raise(ResourceConflict.new(response))
           when 422

activeresource/test/connection_test.rb

@@ -41,6 +41,9 @@ class ConnectionTest < Test::Unit::TestCase
     # 404 is a missing resource.
     assert_response_raises ActiveResource::ResourceNotFound, 404
 
+    # 405 is a missing not allowed error
+    assert_response_raises ActiveResource::MethodNotAllowed, 405
+
     # 409 is an optimistic locking error
     assert_response_raises ActiveResource::ResourceConflict, 409
 
@@ -63,6 +66,16 @@ class ConnectionTest < Test::Unit::TestCase
     end
   end
 
+  ResponseHeaderStub = Struct.new(:code, 'Allow')
+  def test_should_return_allowed_methods_for_method_no_allowed_exception
+    begin
+      handle_response ResponseHeaderStub.new(405, "GET, POST")
+    rescue ActiveResource::MethodNotAllowed => e
+      assert_equal "Failed with 405", e.message
+      assert_equal [:get, :post], e.allowed_methods
+    end
+  end
+
   def test_initialize_raises_argument_error_on_missing_site
     assert_raise(ArgumentError) { ActiveResource::Connection.new(nil) }
   end