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WebSocket (eBook, ePUB)

Until recently, creating desktop-like applications in the browser meant using inefficient Ajax or Comet technologies to communicate with the server. With this practical guide, youll learn how to use WebSocket, a protocol that enables the client and server to communicate with each other on a single connection simultaneously. No more asynchronous communication or long polling!For developers with a good grasp of JavaScript (and perhaps Node.js), author Andrew Lombardi provides useful hands-on examples throughout the book to help you get up to speed with the WebSocket API. Youll also learn how to use WebSocket with Transport Layer Security (TLS).Learn how to use WebSocket API events, messages, attributes, and methods within your client applicationBuild bi-directional chat applications on the client and server with WebSocket as the communication layerCreate a subprotocol over WebSocket for STOMP 1.0, the Simple Text Oriented Messaging ProtocolUse options for older browsers that dont natively support WebSocketProtect your WebSocket application against various attack vectors with TLS and other toolsDebug applications by learning aspects of the WebSocket lifecycle

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Price: 14.95 EUR excl. shipping

JSON at Work (eBook, ePUB)

JSON is becoming the backbone for meaningful data interchange over the internet. This format is now supported by an entire ecosystem of standards, tools, and technologies for building truly elegant, useful, and efficient applications. With this hands-on guide, author and architect Tom Marrs shows you how to build enterprise-class applications and services by leveraging JSON tooling and message/document design.JSON at Work provides application architects and developers with guidelines, best practices, and use cases, along with lots of real-world examples and code samples. Youll start with a comprehensive JSON overview, explore the JSON ecosystem, and then dive into JSONs use in the enterprise.Get acquainted with JSON basics and learn how to model JSON dataLearn how to use JSON with Node.js, Ruby on Rails, and JavaStructure JSON documents with JSON Schema to design and test APIsSearch the contents of JSON documents with JSON Search toolsConvert JSON documents to other data formats with JSON Transform toolsCompare JSON-based hypermedia formats, including HAL and jsonapiLeverage MongoDB to store and access JSON documentsUse Apache Kafka to exchange JSON-based messages between services

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Price: 24.95 EUR excl. shipping

JavaScript

- Syntax und Konzeption von JavaScript- JavaScript im Umfeld des modernen Webs- Programmierung von leistungsfähige Rich Internet Applications (RIAs)- Fortgeschrittene Techniken rund um HTML5- Extra: E-Book insideMit JavaScript steht die derzeit einzige Möglichkeit bereit, mit der Sie plattformübergreifend im WWW auf Seiten des Clients (also im Browser) programmieren können. Sie können damit beispielsweise eine Webseite an unterschiedliche Browser und Plattformeinstellungen des Besuchers anpassen, Benutzereingaben in einer Webseite plausibilisieren, Teile einer Webseite durch dynamisch nachgeladene Daten austauschen (AJAX), die Webseite nach dem Laden dynamisch verändern (DHTML) oder auch gezielt auf Aktionen eines Besuchers in der Webseite reagieren. Aber auch auf Serverseite oder bei mobilen Anwendungen gewinnt JavaSript an Bedeutung. Das vorliegende Buch vermittelt Ihnen zunächst das Basiswissen, um die Skriptsprache JavaScript in Verbindung mit internen JavaScript-Objekten undvor allem DOM-Objekten optimal zu nutzen. Berücksichtigt werden dabei auch die neuen Spracheigenschaften und Aspekte von HTML5/DOM5 sowie erweiterte JavaScript-Möglichkeiten wie Ausnahmebehandlung, Prototyping und die Umsetzung der objektorientierten Programmierung (OOP) in JavaScript sowie insbesondere AJAX. AUS DEM INHALT // Grundlagen und Umfeld von JavaScript / Vorbereitendes Basiswissen (HTML und XHTML mit den Neuerungen von HTML5, CSS mit den Neuerungen von CSS3, XML) / JavaScript in Webseiten einbinden / Elementare Grundstrukturen in JavaScript / Fehlersuche und -behandlung / Alles zu JavaScript und Objekten / Ereignisbehandlung / Ausnahmebehandlung / DHTML / AJAX / Fortgeschrittene JavaScript-Techniken (Objekterweiterung und Prototyping, Zeichnen mit Canvas- und SVG-Objekten, Local Storage, Push-Services, serverseitiges JavaScript mit Node.JS, Geodating etc.)

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Price: 30.90 EUR excl. shipping

Mastering Swoole PHP (eBook, ePUB)

Build your high performance large scale concurrent system in a more flexible and efficient way than ever before with this first & only Swoole PHP book, with PHP 8 ready. Introduction Introducing a new execution model of PHP applications, how Swoole PHP works and the pitfalls of new developers coming into the Swoole PHP world. This book is also about the general concepts behind building a high concurrency and high-performance web system and how these concepts are implemented in Swoole PHP and how advanced PHP works. This book provides just enough Linux OS kernel knowledges with code samples helping you understand how async I/O, concurrency and coroutine works. When start learning or using a new framework, people always carry some assumption coming from the previous experience. Some of these experiences are helpful to understand the new system, but some of these experiences may lead to the misunderstanding of the new system. This book introduces the pitfalls to avoid if you are an experienced PHP developer. This book is for the developers who have already know the basics about how a web system works such as PHP web application or application in the other programming languages such as Node.js, Golang or Java. After reading this book, you should be able to build a high concurrent Swoole PHP system with confidence.

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Price: 22.95 EUR excl. shipping

Build Talking Apps

Voice recognition is here at last. Alexa and other voice assistants have now become widespread and mainstream. Is your app ready for voice interaction? Learn how to develop your own voice applications for Amazon Alexa. Start with techniques for building conversational user interfaces and dialog management. Integrate with existing applications and visual interfaces to complement voice-first applications. The future of human-computer interaction is voice, and we'll help you get ready for it. For decades, voice-enabled computers have only existed in the realm of science fiction. But now the Alexa Skills Kit (ASK) lets you develop your own voice-first applications. Leverage ASK to create engaging and natural user interfaces for your applications, enabling them to listen to users and talk back. You'll see how to use voice and sound as first-class components of user-interface design. We'll start with the essentials of building Alexa voice applications, called skills, including useful tools for creating, testing, and deploying your skills. From there, you can define parameters and dialogs that will prompt users for input in a natural, conversational style. Integrate your Alexa skills with Amazon services and other backend services to create a custom user experience. Discover how to tailor Alexa's voice and language to create more engaging responses and speak in the user's own language. Complement the voice-first experience with visual interfaces for users on screen-based devices. Add options for users to buy upgrades or other products from your application. Once all the pieces are in place, learn how to publish your Alexa skill for everyone to use. Create the future of user interfaces using the Alexa Skills Kit today. What You Need: You will need a computer capable of running the latest version of Node.js, a Git client, and internet access.

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Price: 38.99 EUR excl. shipping

Building Telegram Bots (eBook, PDF)

Learn about bot programming, using all the latest and greatest programming languages, including Python, Go, and Clojure, so you can feel at ease writing your Telegram bot in a way that suits you. This book shows how you can use bots for just about everything: they connect, they respond, they enhance your job search chances, they do technical research for you, they remind you about your last train, they tell the difference between a horse and a zebra, they can tell jokes, and they can cheer you up in the middle of the night. Bots used to be hard to set up and enhance, but with the help of Building Telegram Bots you'll see how the Telegram platform is now making bot creation easier than ever. You will begin by writing a simple bot at the start and then gradually build upon it. The simple yet effective Telegram Bot API makes it very easy to develop bots in a number of programming languages. Languages featured in the book include Node.js, Java, Rust, and Elixir. This book encourages you to not only learn the basic process of creating a bot but also lets you spend time exploring its possibilities. By the end of the book you will be able create your own Telegram Bot with the programming language of your choice. What You Will LearnCarry out simple bot design and deployment in various programming languages including Ruby, D, Crystal, Nim, and C++ Create engaging bot interactions with your users Add payments and media capabilities to your bots Master programming language abstraction Who This Book Is For Engineers who want to get things done. People who are curious. Programming beginners. Advanced engineers with little time to do research.

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Price: 26.95 EUR excl. shipping

Eloquent JavaScript

Completely revised and updated, this best-selling introduction to programming in JavaScript focuses on writing real applications.JavaScript lies at the heart of almost every modern web application, from social apps like Twitter to browser-based game frameworks like Phaser and Babylon. Though simple for beginners to pick up and play with, JavaScript is a flexible, complex language that you can use to build full-scale applications.This much anticipated and thoroughly revised third edition of Eloquent JavaScript dives deep into the JavaScript language to show you how to write beautiful, effective code. It has been updated to reflect the current state of Java¬Script and web browsers and includes brand-new material on features like class notation, arrow functions, iterators, async functions, template strings, and block scope. A host of new exercises have also been added to test your skills and keep you on track. As with previous editions, Haverbeke continues to teach through extensive examples and immerses you in code from the start, while exercises and full-chapter projects give you hands-on experience with writing your own programs. You start by learning the basic structure of the JavaScript language as well as control structures, functions, and data structures to help you write basic programs. Then you'll learn about error handling and bug fixing, modularity, and asynchronous programming before moving on to web browsers and how JavaScript is used to program them. As you build projects such as an artificial life simulation, a simple programming language, and a paint program, you'll learn how to:- Understand the essential elements of programming, including syntax, control, and data- Organize and clarify your code with object-oriented and functional programming techniques- Script the browser and make basic web applications- Use the DOM effectively to interact with browsers- Harness Node.js to build servers and utilitiesIsn't it time you became fluent in the language of the Web?* All source code is available online in an inter¬active sandbox, where you can edit the code, run it, and see its output instantly.

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Price: 24.99 EUR excl. shipping

IoT Development for ESP32 and ESP8266 with JavaScript

This book introduces a new approach to embedded development, grounded in modern, industry-standard JavaScript. Using the same language that powers web browsers and Node.js, the Moddable SDK empowers IoT developers to apply many of the same tools and techniques used to build sophisticated websites and mobile apps.The Moddable SDK enables you to unlock the full potential of inexpensive microcontrollers like the ESP32 and ESP8266. Coding for these microcontrollers in C or C++ with the ESP-IDF and Arduino SDKs works for building basic products but doesn't scale to handle the increasingly complex IoT products that customers expect. The Moddable SDK adds the lightweight XS JavaScript engine to those traditional environments, accelerating development with JavaScript while keeping the performance benefits of a native SDK.Building user interfaces and communicating over the network are two areas where JavaScript really shines. IoT Development for ESP32 and ESP8266 with JavaScript shows you how to build responsive touch screen user interfaces using the Piu framework. You'll learn how easy it is to securely send and receive JSON data over Wi-Fi with elegant JavaScript APIs for common IoT protocols, including HTTP/HTTPS, WebSocket, MQTT, and mDNS. You'll also learn how to integrate common sensors and actuators, Bluetooth Low Energy (BLE), file systems, and more into your projects, and you'll see firsthand how JavaScript makes it easier to combine these diverse technologies.If you're an embedded C or C++ developer who has never worked in JavaScript, don't worry. This book includes an introduction to the JavaScript language just for embedded developers experienced with C or C++.What You'll Learn Building, installing, and debugging JavaScript projects on the ESP32 and ESP8266 Using modern JavaScript for all aspects of embedded development with the Moddable SDK Developing IoT products with animated user interfaces, touch input, networking, BLE, sensors, actuators, and more Who This Book Is For Professional embedded developers who want the speed, flexibility, and power of web development in their embedded software work Makers who want a faster, easier way to build their hobby projects Web developers working in JavaScript who want to extend their skills to hardware products

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Price: 26.99 EUR excl. shipping