la til lambdaffunksjon for å skrive om request

aws/beta.ordbok.uib.no_stack.yaml

@@ -38,6 +38,38 @@ Parameters:
 Resources:
 ###############################################################################
 
+  LambdaRole:
+    Type: "AWS::IAM::Role"
+    Properties:
+      AssumeRolePolicyDocument:
+        Version: "2012-10-17"
+        Statement:
+          - Effect: "Allow"
+            Principal:
+              Service:
+                - "lambda.amazonaws.com"
+                - "edgelambda.amazonaws.com"
+            Action:
+              - "sts:AssumeRole"
+  RewriteLambda:
+    Type: "AWS::Lambda::Function"
+    Properties:
+      Code:
+        ZipFile: !Sub |
+          'use strict';
+
+          // lambda@edge Origin Request trigger to remove the first path element
+          // compatible with either Node.js 6.10 or 8.10 Lambda runtime environment
+
+          exports.handler = (event, context, callback) => {
+            const request = event.Records[0].cf.request;           // extract the request object
+            request.uri = request.uri.replace(/^\/[^\/]+\//,'/');  // modify the URI
+            return callback(null, request);                        // return control to CloudFront
+          };
+    Handler: index.handler
+    Role: !GetAtt LambdaRole.Arn
+    Runtime: node8.10
+
   DNS:
     Type: "AWS::Route53::RecordSet"
     Properties: