Tips

Web Scraping using object notation

Want to retrieve data that isn’t available via REST or Web Services? What if it’s only available on a website? The data is easy enough for a human to read, but reading HTML data with a programming language isn’t so simple. Some developers try to use Position and Substring, others try Regex, but it’s unpleasant and time-consuming. A very different approach is to convert the HTML into an object and get the data via object notation. Table rows are handled as collections and are easy to loop through!

This blog post describes how to use this approach and provides some handy tips.

Tips

Test the powerful 4D REST server with Postman

4D provides a powerful REST server that enables direct access to data stored in your 4D databases. This makes it possible, for example, to build an API to use with a modern front-end technology (e.g., Angular, React, etc.). In this blog post, we’ll provide the first introduction to the 4D robust REST server. You’ll see how to configure it and test the create, retrieve, update, and delete (CRUD) operations using the API testing tool, Postman.

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More information about web processes

You asked for more information about web processes to better identify requests that might be slowing down or blocking your server. We heard you and in 4D v17 R5, we’ve added information about the URL used by web processes. This information can be retrieved two ways: via the 4D Server Administration Window or via the 4D language with the Get process activity command.

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New server administration commands

4D continues to deliver features to help you create your own applications to monitor your servers. From programmatically retrieving information about sessions, processes, and the application server, to getting information about the web server.

Having already provided you commands to read about statuses, 4D v17 R4 now gives you the ability to change statuses. You can now create your own administration interfaces as dialogs on the server, client, or even as HTML pages for web access. It’s up to you. These commands allow you to perform the same actions as the standard 4D administration interface. For example, you can send a message to your users to notify them of scheduled maintenance, or block new connections to the application server while you perform an operation on it.

Tips

Bootstrap and 4D transformation tags

Do you need to access your 4D data from a web page but don’t have a designer in your team? Are you uncomfortable designing the pages yourself because deep down you believe that it’s full of complicated and unwritten rules? Well, have you ever thought about Bootstrap?
In this blog post, we’ll look at how to take advantage of Bootstrap’s framework to design web pages in no time! We’ll also provide you with a database example to see how it can be combined with 4D transformation tags.

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Higher security ranking for 4D web sites

HTTPS is a well-known HTTP protocol, covered with a layer of SSL/TLS encryption goodness. This protocol is intended to provide confidentiality and integrity by encrypting communications between your server and your end users, rendering your data secure from prying eyes.

4D v16 R6 takes it a step further: 4D Web server now supports Perfect Forward Secrecy (PFS). This provides you with the highest security level for your communications – by default! Beyond the protection it provides, the support of PFS also increases the SSL audit test results of an out-of-the-box 4D server, which is great for our customers. Especially those working with sensitive information.

Tips

Play videos with 4D

We’re in the visual and interactive content era. It’s becoming increasingly more and more prominent. Take a look at digital community statistics and you’ll discover that YouTube is the second most popular social network.

At some point, most web developers want to include videos in their sites and coincidentally, databases frequently contain links to videos (either hosted locally or on the web). This post shows you two ways to include videos in your 4D applications.

Product The 4D WEB Server information by programming

New command to get Web Server information

This feature is another way of providing you the ability to create your own server administration dialog. Following the ability to retrieve information for all processes (added in 4D v16 R4), we are now offering you a new command which returns, as a whole, all runtime information about 4D Web server.

With 4D v16 R5, retrieving web server information has never been easier, thanks to a single command: WEB Get server info.