Add examples folder.

Author: zac

examples/waf_rate_limit.rb

@@ -0,0 +1,36 @@
+# CFNDSL
+
+Resource('RateLimitRule') {
+    Type 'Custom::WAFRateLimit'
+    Property('ServiceToken', FnGetAtt('WAFRateLimitFunction', 'Arn'))
+    Property('EnvironmentName', Ref('EnvironmentName'))
+    Property('Region', Ref("AWS::Region"))
+    Property('Rate', 5000)
+    Property('Negated', true)
+    Property('Action', 'BLOCK')
+    Property('IPSet', waf_ip_set(ip_blocks, ['rate_limited']))
+    Property('WebACLId', Ref('WebACL'))
+    Property('Priority', 2)
+}
+
+Resource('WAFRateLimitFunction') {
+    Type 'AWS::Lambda::Function'
+    Property('Code', './waf_rate_limit/')
+    Property('Handler', 'handler.lambda_handler')
+    Property('Runtime', 'python3.6')
+    Property('Timeout', 60)
+    Property('Role', FnGetAtt('WAFRole', 'Arn'))
+}
+
+Resource("WAFRole") {
+    Type 'AWS::IAM::Role'
+    Property('AssumeRolePolicyDocument', {
+      Statement: [
+        Effect: 'Allow',
+        Principal: { Service: [ 'lambda.amazonaws.com' ] },
+        Action: [ 'sts:AssumeRole' ]
+      ]
+    })
+    Property('Path','/')
+    Property('Policies', Policies.new.get_policies('waf'))
+}