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Vanessa Talbot

Integrating User Authentication in Your Qodly Applications

In this week’s blog, we will focus on the crucial topic of authentication. To illustrate our discussion, we will use the example of an application designed for writing annual performance reviews for employees. This application enables users to securely access their accounts by authenticating with their email and password.

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Nicolas Brachfogel
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Building evaluation applications

In previous versions of 4D, developers could request evaluation licenses for development purposes, but providing end users with evaluation versions of built applications—whether standalone or client/server—was challenging or even impossible.

Starting with 4D 20.7 and 20 R8, you can now create evaluation versions of your applications. When a user runs an evaluation application for the first time on a new machine, it will automatically contact a 4D service to obtain a 14-day evaluation license—without any manual action required from the user.

This blog post will guide you through the process of creating an evaluation version of your application for demo purposes.

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Vanessa Talbot
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Master Web Applications with 4D Qodly Pro: A Tutorial Series

Welcome to our tutorial series on creating powerful web applications with 4D Qodly Pro and 4D Server! Whether you’re a seasoned web developer or just starting, 4D Qodly Pro transforms your 4D development platform into a powerful hybrid low-code solution that brings your 4D data to the web without requiring deep expertise in front-end technologies.

With 4D Qodly Pro, you can seamlessly extend your existing 4D applications to interactive, responsive web interfaces and design modern Web Business applications powered by 4D Technology, such as the amazing 4D Write Pro. The best part? You’ll build on what you already know while unlocking new possibilities for your users.

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Master HTTP Requests with 4D Request Handlers

In today’s web-driven world, servers process an overwhelming number of requests. Efficiently analyzing, counting, interpreting, and rerouting these requests is essential, especially when applying MVC principles.

In 4D 20 R8, with the introduction of HTTP Request Handlers on the 4D HTTP Server, you can define accurately which business logic you want to trigger regarding specific URLs patterns.

Main advantages of this feature are:

  • Offering more granularity in implementing the code handling received requests. This business logic can be split in several classes. Forget extensive Case of statements in the On Web Connection database method.
  • Allowing a redirection on a Qodly page which opens up new perspectives to extend 4D application on the web

 

This powerful feature unlocks many possibilities, as detailed below. Keep reading to learn more and work with concrete examples.

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Nicolas Brachfogel
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New class to perform TCP connections

With the release of 4D 20 R8, a game-changing feature has arrived:: the TCPConnection class. This modern class leverages object-oriented syntax and supports asynchronous network connection handling, providing a fresh and powerful alternative to the 4D Internet Commands. Using TCPConnection, you can connect to virtually anything—whether it’s servers, printers, cash registers, or industrial devices—making it a versatile tool for handling unique networking requirements.

In this release, the TCP client functionality is available, allowing you to connect to external servers and seamlessly exchange data.

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Roland Lannuzel
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4D Write Pro – Sign and secure documents

The purpose of this article is to show how, in an easy-to-implement way, you can sign and verify documents transparently.
The obvious benefit of this approach is peace of mind when the documents are opened again, safe in the knowledge that they have not been modified in the meantime.

This is especially important if you store 4D Write Pro documents as smart templates containing 4D code as external files on disk. Before executing this code you want to ensure the file was not externally modified.

Or, in the case of external documents, to be certain that they have come from the right sender and have not been altered during their digital journey.
The principle we’re about to describe applies to 4D Write Pro documents but applies to any other type of document with a few minor modifications.

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