[aws|storage] Add get/put bucket policy support

lib/fog/storage/aws.rb

@@ -24,6 +24,7 @@ module Fog
       request :get_bucket_location
       request :get_bucket_logging
       request :get_bucket_object_versions
+			request :get_bucket_policy
       request :get_bucket_versioning
       request :get_bucket_website
       request :get_object
@@ -40,6 +41,7 @@ module Fog
       request :put_bucket
       request :put_bucket_acl
       request :put_bucket_logging
+			request :put_bucket_policy
       request :put_bucket_versioning
       request :put_bucket_website
       request :put_object

lib/fog/storage/requests/aws/get_bucket_policy.rb

@@ -0,0 +1,37 @@
+module Fog
+  module AWS
+    class Storage
+      class Real
+
+				# Get bucket policy for an S3 bucket
+        #
+        # ==== Parameters
+        # * bucket_name<~String> - name of bucket to get policy for
+        #
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash> - policy document 
+				#     
+        # ==== See Also
+        # http://docs.amazonwebservices.com/AmazonS3/latest/API/RESTBucketGETpolicy.html
+				
+				def get_bucket_policy(bucket_name)
+          unless bucket_name
+            raise ArgumentError.new('bucket_name is required')
+          end
+          response = request({
+            :expects    => 200,
+            :headers    => {},
+            :host       => "#{bucket_name}.#{@host}",
+            :idempotent => true,
+            :method     => 'GET',
+            :query      => {'policy' => nil}
+          })
+					response.body = JSON.parse(response.body) unless response.body.nil?
+        end
+
+      end
+
+		end
+  end
+end

lib/fog/storage/requests/aws/put_bucket_policy.rb

@@ -0,0 +1,30 @@
+module Fog
+  module AWS
+    class Storage
+      class Real
+
+        # Change bucket policy for an S3 bucket
+        #
+        # ==== Parameters
+        # * bucket_name<~String> - name of bucket to modify
+        # * policy<~Hash> - policy document 
+        #
+        # ==== See Also
+        # http://docs.amazonwebservices.com/AmazonS3/latest/API/RESTBucketPUTpolicy.html 
+
+        def put_bucket_policy(bucket_name, policy)
+          request({
+            :body     => policy.to_json,
+            :expects  => 204,
+            :headers  => {},
+            :host     => "#{bucket_name}.#{@host}",
+            :method   => 'PUT',
+            :query    => {'policy' => nil}
+          })
+        end
+
+      end
+    end
+  end
+end
+