Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Delphi Programming Projects
Delphi Programming Projects

Delphi Programming Projects: Build a range of exciting projects by exploring cross-platform development and microservices

eBook
€17.99 €26.99
Paperback
€32.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with eBook?

Product feature icon Instant access to your Digital eBook purchase
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Product feature icon AI Assistant (beta) to help accelerate your learning
OR
Modal Close icon
Payment Processing...
tick Completed

Billing Address

Table of content icon View table of contents Preview book icon Preview Book

Delphi Programming Projects

Building a Facebook REST API

Still talking about social networks, Facebook is undoubtedly the largest one. With more than 2 billion active users in 2018, it had twice the number of users of Instagram and WhatsApp. Curiously, Facebook owns both. Do not be surprised if a new social network belongs to billionaire Mark Zuckerberg.

This chapter will transcend the boundaries of Delphi; you will have to interact with the Facebook platform.

Initially, you will be introduced to Facebook's development platform in order to create an application on the social network. This application will be used to perform the integration between Delphi and Facebook.

You will then learn about Representational State Transfer (REST) concepts and the JavaScript Object Notation (JSON) standard. Basically, we will traffic a file or text in JSON format to a REST server, using the Facebook API.

Finally,...

Technical requirements

Facebook Graph API and more

Delphi comes with all the components you need for you to enjoy this chapter. We will basically use the TRESTClient component to do this. First, you'll be taught how to authenticate with Facebook and get an access token, and then how to run an Open Graph query to get user information. Being able to authenticate on Facebook is very useful if you are creating any kind of content application for Android or iOS.

The Graph API is the key way to interact with the Facebook platform. It is a low-level API that uses applications to query data, publish new posts, manage ads, upload photos, and more.

Project overview

The purpose of this chapter is to develop a hybrid application (Windows, Android, iOS, and macOS) that will connect to Facebook through the Graph API.

The estimated build time is 10 minutes.

Getting started

You must have internet access to register your application on Facebook and consume the REST API.

Creating an application on Facebook

You need to register your project as an application on Facebook before you can access the Facebook API using Delphi. We can do this using the following page: https://developers.facebook.com/apps. The page will look like the following screenshot:

We will create the application on the Facebook platform, which is necessary to perform the integration and log in on the Facebook platform for this project and follow these steps:

  1. Add a new application to Facebook. For this chapter, we will call it DelphiProjectsPackt:

  1. Solve the reCAPTCHA and Submit your information:
  1. Navigate to Select a Scenario | Integrate Facebook Login:
  1. Before saving changes, fill in the two required fields—Privacy Policy URL and Category:
  1. Save the changes.
  2. Click on Finish Quickstart, as shown in the following screenshot:
  1. Select Web in Quickstart options...

Request and response REST services

REST is one of the main models that has been described by Roy Fielding, one of the principal creators of the HTTP protocol, in his Ph.D. thesis and adopted as the model to be used in the evolution of the HTTP protocol architecture.

The Embarcadero REST Library is accessible for all platforms, supported by Delphi.

The framework focuses on JSON as the representation format. The XML format is not supported.

The Embarcadero REST Library consists of three main components—the request, the client, and the response. All are part of a single workflow when submitting, processing, and returning the request with JSON.

TRESTClient

This component performs a request to a REST server. TRESTClient...

Working with JSON

JSON is an open standard file format that utilizes to convey data objects. These objects consist of attribute-value pairs and array data types. Delphi provides a native library for working with JSON containing classes and methods for storing, parsing, reading, writing, and generating data. Facebook works with JSON information traffic through the Graph API. When you use communication with Facebook's REST server, the expected return is the result of the JSON standard.

The following code snippet illustrates an example in JSON:

{
"glossary": {
"title": "example glossary",
"GlossDiv": {
"title": "S",
"GlossList": {
"GlossEntry": {
"ID": "SGML",
"SortAs": "SGML",
...

Logging in with Facebook

You request an access token by opening the page. The access token is valid for only two hours. You can update the token in the background without the user having to log in again.

We have reached the last stage of this chapter. This is where we will add the final seasoning. To finally include the login functionality, you need to create a new form to receive a web page with which the user will interact to confirm their identity and to confirm the permissions requested by the application.

Coding login

Before encoding the login, we need to create a new form to display the Facebook authentication Uniform Resource Identifier (URI). By following the next steps alongside the new form, we will finally be able...

Summary

In this chapter, we learned interesting concepts about REST APIs, authentication, security, and, of course, how to log in to one of the most popular social networks, Facebook.

The first step was to create a direct application on the Facebook platform, selecting the desired login type (login flow for web) and some other additional information, such as application name, permissions, and application ID, among others.

With the application ID in hand, we started building our Delphi application to interact using the REST component suite with Facebook.

It is noteworthy that, without the correct configuration of the components and following the technical standards of connection of the platform, none of this would be possible. The same goes for any REST API service that's available. Some will use OAuth2, like Facebook; others will not. What's important to note is the...

Further reading

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • Build responsive user interfaces (UIs) for desktop and mobile with FireMonkey
  • Implement a microservices architecture using the Rapid Application Development(RAD) server
  • Create clones of popular applications like Instagram and Facebook using Delphi 10.3

Description

Delphi is a cross-platform programming language and software development kit that supports rapid application development for Microsoft Windows, Apple Mac OS X, Android, and iOS. With the help of seven practical projects, this book will guide you through the best practices, Delphi Run-Time Library (RTL) resources, and design patterns. Whether you use the Visual Component Library (VCL) or FireMonkey (FMX) framework, these design patterns will be implemented in the same way in Delphi, using Object Pascal. In the first few chapters, you will explore advanced features that will help you build rich applications using the same code base for both mobile and desktop projects. In addition to this, you’ll learn how to implement microservice architecture in Delphi. As you get familiar with the various aspects of Delphi, you will no longer need to maintain source code for similar projects, program business rules on screens, or fill your forms with data access components. By the end of this book, you will have gained an understanding of the principles of clean code and become proficient in building robust and scalable applications in Delphi.

Who is this book for?

This book is for developers, programmers, and IT professionals who want to learn the best market practices by implementing practical projects. Prior knowledge of the Delphi language is a must.

What you will learn

  • Get to grips with the advanced features of RTL
  • Understand how to deal with the paradigm change between multiplatform projects
  • Build rich interfaces with Google s Material Design features
  • Understand how to implement design patterns in Delphi
  • Turn a mobile device into a remote controller with app tethering technology
  • Build a multi-database system using VCL

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : May 03, 2019
Length: 248 pages
Edition : 1st
Language : English
ISBN-13 : 9781789135237
Category :
Languages :

What do you get with eBook?

Product feature icon Instant access to your Digital eBook purchase
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Product feature icon AI Assistant (beta) to help accelerate your learning
OR
Modal Close icon
Payment Processing...
tick Completed

Billing Address

Product Details

Publication date : May 03, 2019
Length: 248 pages
Edition : 1st
Language : English
ISBN-13 : 9781789135237
Category :
Languages :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 111.97
Delphi Cookbook
€41.99
Delphi Programming Projects
€32.99
Hands-On Design Patterns with Delphi
€36.99
Total 111.97 Stars icon
Banner background image

Table of Contents

8 Chapters
Building an Instagram Clone Chevron down icon Chevron up icon
Building a Facebook REST API Chevron down icon Chevron up icon
Cross-Platform Services for Windows, iOS, and Android Chevron down icon Chevron up icon
Design Patterns to Build a Multi-Database System Chevron down icon Chevron up icon
Creating GUI Apps with FireMonkey Chevron down icon Chevron up icon
Implementing Tethering to Create a Remote Control Chevron down icon Chevron up icon
Building Microservices Using the RAD Server Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.2
(9 Ratings)
5 star 55.6%
4 star 22.2%
3 star 11.1%
2 star 11.1%
1 star 0%
Filter icon Filter
Top Reviews

Filter reviews by




Anônimo Dec 13, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Recomendo os capítulos do RAD Server e de material design especialmente. O livro é uma jóia.
Amazon Verified review Amazon
Nivaldo de Amorim Assis Jul 24, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Ótimo livro.
Amazon Verified review Amazon
Seeker Nov 15, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I have a requirement for a Rad Server project from a client and I read up all the information on Embarcadero web sites and looked at a few videos, even got their official PDF that describes it. But there were several issues not explained properly. Luckily I discovered this book and bought from Packt directly as ebook. Went straight to the chapter on Micro services with Rad Server and found all the information with neat screenshots explaining all the steps right till the deployment stage. Very nice! It takes effort to compile such complex information in logical steps that are easy to understand.
Amazon Verified review Amazon
Fabio Cardoso Chagas Jun 10, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Conciso, e excelente fluxo de aprendizado. Os tópicos associados facilitam o entendimento. Ótimo para consultas rápidas de técnicas atuais que melhoram a aplicação.
Amazon Verified review Amazon
Mauricio Abreu Jul 09, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
O produto é exatamente o que eu precisava e tem a qualidade muito boa.A entrega da Amazon foi incrível chegou antes da data estimada.
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

How do I buy and download an eBook? Chevron down icon Chevron up icon

Where there is an eBook version of a title available, you can buy it from the book details for that title. Add either the standalone eBook or the eBook and print book bundle to your shopping cart. Your eBook will show in your cart as a product on its own. After completing checkout and payment in the normal way, you will receive your receipt on the screen containing a link to a personalised PDF download file. This link will remain active for 30 days. You can download backup copies of the file by logging in to your account at any time.

If you already have Adobe reader installed, then clicking on the link will download and open the PDF file directly. If you don't, then save the PDF file on your machine and download the Reader to view it.

Please Note: Packt eBooks are non-returnable and non-refundable.

Packt eBook and Licensing When you buy an eBook from Packt Publishing, completing your purchase means you accept the terms of our licence agreement. Please read the full text of the agreement. In it we have tried to balance the need for the ebook to be usable for you the reader with our needs to protect the rights of us as Publishers and of our authors. In summary, the agreement says:

  • You may make copies of your eBook for your own use onto any machine
  • You may not pass copies of the eBook on to anyone else
How can I make a purchase on your website? Chevron down icon Chevron up icon

If you want to purchase a video course, eBook or Bundle (Print+eBook) please follow below steps:

  1. Register on our website using your email address and the password.
  2. Search for the title by name or ISBN using the search option.
  3. Select the title you want to purchase.
  4. Choose the format you wish to purchase the title in; if you order the Print Book, you get a free eBook copy of the same title. 
  5. Proceed with the checkout process (payment to be made using Credit Card, Debit Cart, or PayPal)
Where can I access support around an eBook? Chevron down icon Chevron up icon
  • If you experience a problem with using or installing Adobe Reader, the contact Adobe directly.
  • To view the errata for the book, see www.packtpub.com/support and view the pages for the title you have.
  • To view your account details or to download a new copy of the book go to www.packtpub.com/account
  • To contact us directly if a problem is not resolved, use www.packtpub.com/contact-us
What eBook formats do Packt support? Chevron down icon Chevron up icon

Our eBooks are currently available in a variety of formats such as PDF and ePubs. In the future, this may well change with trends and development in technology, but please note that our PDFs are not Adobe eBook Reader format, which has greater restrictions on security.

You will need to use Adobe Reader v9 or later in order to read Packt's PDF eBooks.

What are the benefits of eBooks? Chevron down icon Chevron up icon
  • You can get the information you need immediately
  • You can easily take them with you on a laptop
  • You can download them an unlimited number of times
  • You can print them out
  • They are copy-paste enabled
  • They are searchable
  • There is no password protection
  • They are lower price than print
  • They save resources and space
What is an eBook? Chevron down icon Chevron up icon

Packt eBooks are a complete electronic version of the print edition, available in PDF and ePub formats. Every piece of content down to the page numbering is the same. Because we save the costs of printing and shipping the book to you, we are able to offer eBooks at a lower cost than print editions.

When you have purchased an eBook, simply login to your account and click on the link in Your Download Area. We recommend you saving the file to your hard drive before opening it.

For optimal viewing of our eBooks, we recommend you download and install the free Adobe Reader version 9.