constructor()

in lib/module_2/ab_testing_module_2.ts [29:133]
48 lines of code
1 McCabe index (conditional complexity)

  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const hostingBucket = new s3.Bucket(this, 'hosting-bucket');
    const myOrigin = new origins.S3Origin(hostingBucket);

    new s3.Bucket(this, 'my-config-ab-testing-bucket');

    const viewerRequestFunction = new cloudfront.Function(this, 'StatefulViewerRequest', {
      code: cloudfront.FunctionCode.fromInline(`
      var X_Experiment_A = "index.html";
      var X_Experiment_B = "index_b.html";
      var X_Experiment_Value = 0;

      function handler(event) {
          console.log(JSON.stringify(event));
          var request = event.request;
          var headers = request.headers;

          // If no experiment value, generate it, and store it in a header, else read it.
          if (!request.cookies['X-Experiment']) {
              X_Experiment_Value = Math.floor(Math.random() * 100);
              console.log("X_Experiment_U NEW_USER");
          } else {
              X_Experiment_Value = parseInt(request.cookies["X-Experiment"].value);
              console.log("X_Experiment_U RETURNING_USER");

          }

          headers.createcookie = {value:(X_Experiment_Value).toString()};

          if (X_Experiment_Value < 80) {
              request.uri = '/index_b.html';
          } else {
              request.uri = '/index.html';
          }
          console.log("after="+JSON.stringify(event));

          console.log("X_Experiment_V " + (request.uri == '/index.html' ? 'A_VERSION' : 'B_VERSION'));
          return request;

      };
      `),
    });

    const viewerResponseFunction = new cloudfront.Function(this, 'StatefulViewerResponse', {
      code: cloudfront.FunctionCode.fromInline(`
      function handler(event) {
        console.log(JSON.stringify(event));
        var response = event.response;
        var headers = event.request.headers;
        var request = event.request;
        var X_Experiment_Value = 0;

        if(headers.createcookie){
          console.log("create cookie exist");
          X_Experiment_Value = headers["createcookie"].value;
          response.cookies['X-Experiment'] = { "value": X_Experiment_Value};
          console.log("setting X-Experiment=" + X_Experiment_Value);

        }else {
          console.log("cookie missing");
        }

        return response;
    }
      `),
    });

    new s3deployment.BucketDeployment(this, "myDeployment", {
      sources: [s3deployment.Source.asset("./resources/website")],
      destinationBucket: hostingBucket,
    });

    const myDistribution = new cloudfront.Distribution(this, 'myDistribution', {
      defaultBehavior: {
        origin: myOrigin,
        viewerProtocolPolicy: cloudfront.ViewerProtocolPolicy.REDIRECT_TO_HTTPS
      },
      additionalBehaviors: {
        '/': {
          origin: myOrigin,
          viewerProtocolPolicy: cloudfront.ViewerProtocolPolicy.REDIRECT_TO_HTTPS,
          functionAssociations: [{
            function: viewerRequestFunction,
            eventType: cloudfront.FunctionEventType.VIEWER_REQUEST,
          },
          {
            function: viewerResponseFunction,
            eventType: cloudfront.FunctionEventType.VIEWER_RESPONSE,
          }],
        }
      },
      comment : 'AB Testing Workshop - Module 2'
    });

    const dashboard = new ABDashboard(this, "MonitoringDashboard");
    dashboard.createModule2Dashboard(viewerRequestFunction.functionName, viewerResponseFunction.functionName, "ABTestingWorkshopModule2");

    new cdk.CfnOutput(this, 'CloudFrontURL', {
      description: 'The CloudFront distribution URL',
      value: 'https://' + myDistribution.domainName,
  })

  }