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Protecting a Single Page Application (SPA) - Advanced Integration

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Summary

This article outlines a method for integrating CrowdHandler with a single page application (SPA) to protect it from excessive traffic and ensure a smooth user experience. The integration consists of two components: (1) CrowdHandler's Javascript integration with SPA mode enabled, and (2) a custom server-side integration protecting the API(s) that power the SPA. The Javascript integration is responsible for blocking user requests, managing promotion state, and redirecting users to the waiting room if necessary. The server-side integration guards against anyone savvy enough to bypass the Javascript integration, and it feeds CrowdHandler performance information. The article also provides example code for Express Framework and Lambda@Edge environments.

Q&As

What does CrowdHandler's Javascript integration with SPA mode enabled do?
CrowdHandler's Javascript integration with SPA mode enabled works as the first and primary layer of protection, responsible for checking user requests, managing promotion state in-browser, and redirecting users to the waiting room if necessary.

What is the role of the server-side integration in protecting a single page application?
The role of the Server-Side integration is to act as a second layer of protection, guarding against anyone savvy enough to bypass the Javascript integration as well as being responsible for feeding CrowdHandler performance information.

How can additional fields be added to API request payloads?
Additional fields can be added to API request payloads by adding and extracting the additional fields as query string parameters.

What can be done to play nice with users accessing an API directly?
To play nice with users accessing an API directly, the example code can be altered to return a JSON response containing a fully formed waiting room URL. The client-side code can then rewrite the current URL to the waiting room URL.

How can a specialist be contacted for advice and clarification?
A specialist can be contacted for advice and clarification via support@crowdhandler.com.

AI Comments

👍 This article provides an insightful and comprehensive approach to protecting a single page application from excessive traffic. It includes detailed instructions and code examples to facilitate the integration process.

👎 This article is quite long and technical, making it difficult for readers who are not familiar with coding to understand the concepts.

AI Discussion

Me: It's about how to protect a single page application (SPA) with advanced integration. It outlines a two-layer approach for integrating CrowdHandler with a SPA to protect it from excessive traffic and maintain a smooth user experience. The first layer is a Javascript integration with SPA mode enabled, and the second layer is a custom server-side integration to protect the API.

Friend: That's interesting. What are the implications of this approach?

Me: Well, by implementing this two-layer approach, developers can ensure that their SPA is protected against unauthorized access and that their user experience is maintained. It also provides an extra layer of security to protect the API from malicious attacks, which is important for protecting sensitive data. Additionally, developers can use the server-side integration to feed CrowdHandler performance information, which can be used to fine-tune the integration and improve the overall user experience.

Action items

Research and implement the CrowdHandler Javascript integration with SPA mode enabled.
Create a custom server-side integration to protect the API(s) that power your SPA.
Add additional fields to your API request payloads and install server-side code to validate requests against CrowdHandler for promotion state.

Technical terms

Single Page Application (SPA): A type of web application that loads a single HTML page and dynamically updates the page as the user interacts with the application.
CrowdHandler: A cloud-based platform that helps protect websites and applications from excessive traffic.
Javascript Integration: The integration of CrowdHandler's Javascript code into a website or application to enable protection against excessive traffic.
Server-Side Integration: The integration of custom code on the server-side to protect the API (or APIs) that power a single page application.
DOM Reload: A full page refresh of the browser window.
URL State: The current URL of the page.
Event Listener: A function that is triggered when a specific event occurs.
API Request Payloads: The data sent to an API when making a request.
PUT & POST Methods: HTTP methods used to send data to an API.
Lambda@Edge: A feature of Amazon CloudFront that allows users to run custom code at the edge of the cloud.
Viewer Request: A request made by a user to view a web page.
Origin Response: The response sent back to the user from the origin server.