Lambda for extensible redirect / rewrite rules

main.tf

@@ -31,6 +31,7 @@ module "cloudfront" {
   module.waf]
   cloudfront_class = var.cloudfront_class
   waf_acl_arn      = var.waf_enabled ? module.waf[0].waf_acl_arn : null
+  rewrite_rules    = var.rewrite_rules
 }
 
 module "waf" {

modules/cloudfront/lambda_rewrite/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const RuleSet = require('./rules.js');
+
+let ruleSet = new RuleSet();
+
+module.exports.handler = (e, ctx, cb) => {
+  return ruleSet
+    .loadRules()
+    .then(() => {
+      cb(null,ruleSet.applyRules(e).res);
+    });
+};