Our everyday digital experiences are in the midst of a
realtime revolution. Whether we’re talking about virtual
events, EdTech, news and financial information, IoT
devices, asset tracking and logistics, live score updates, or
gaming, consumers increasingly expect realtime digital
experiences as standard. And what better to power these
realtime interactions than WebSockets?
Until the emergence of WebSockets, the “realtime” web was difficult to achieve and
slower than we’re used to nowadays; it was delivered by hacking existing HTTP-based
technologies that were not designed and optimized for realtime applications.
WebSockets mark a turning point for web development. Designed to be event-driven
& full-duplex, and optimized for minimum overhead and low latency, WebSockets have
become a preferred choice for many organizations and developers seeking to build
interactive, realtime digital experiences that provide delightful user experiences.
Who this book is for
This book is intended for developers (and any other types of technical audiences) who
want to:
• Explore the core building blocks of the WebSocket technology, its characteristics, and
its advantages.
• Build realtime web apps with WebSockets.
• Discover the benefits of event-driven architectures with WebSockets.
• Learn about the engineering challenges you will face when building scalable systems
with WebSockets.
Knowledge of/familiarity with HTML, JavaScript (and Node.js), HTTP, web APIs, and web
development is required to get the most out of this book.
07 The WebSocket Handbook Preface
What this book covers
Chapter 1: The Road to WebSockets looks at how web technologies evolved since the
inception of the World Wide Web, culminating with the emergence of WebSockets, a vastly
superior improvement on HTTP for building realtime web apps.
Chapter 2: The WebSocket Protocol covers key considerations related to the WebSocket
protocol. You’ll find out how to establish a WebSocket connection and exchange
messa
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Brief outline
【One-Line Pitch】
Our everyday digital experiences are in the midst of a
realtime revolution. Whether we’re talking about virtual
eve…
【Book Arc】
- **Opening (~0%–12%)**: And what better to power these realtime interactions than WebSockets?; And what better to power these realtime interactions than WebSockets?
- **Early (~12%–35%)**: response (HTTP version number, status code, content type).; nevitably added on a regular basis to their browsers.
- **Middle (~35%–65%)**: ocket protocol consists of an opening handshake (upgrading the connection from HTTP to WebSockets), followed by data transfer.; Upgrade Yes Indicates that the client wants to upgrade the connection to alternative means of communication.
- **Late (~65%–88%)**: Together, Sec-WebSocket-Key and Sec-WebSocket-Accept ensure that both the client and the server can, in fact, communicate over WebSockets.; a Web App with WebSockets to learn how to create your own WebSocket server in Node.js.
- **Ending (~88%–100%)**: Remember that every time the WebSocket server receives a message, it’ll forward it to all connected clients.; const timer setInterval(() { if (ws.readyState 1) { clearInterval(timer) resolve(ws);
【Key Takeaways】
- **And what better to pow…** (Opening): And what better to power these realtime interactions than WebSockets?
- **And what better to pow…** (Opening): And what better to power these realtime interactions than WebSockets?
- **• Build realtime web a…** (Opening): • Build realtime web apps with WebSockets.
- **response (HTTP version…** (Early): response (HTTP version number, status code, content type).
- **nevitably added on a r…** (Early): nevitably added on a regular basis to their browsers.
- **Whenever there’s an up…** (Early): Whenever there’s an update available, the server sends a response, and only closes the connection when explicitly told to do so.
【Reading Tips】
- Use Passage locations below to jump into the text and set reading anchors
- If this is a brief outline, click Regenerate (top right) for a synthesized guide
【Coverage Limits】
Compressed outline without the model (~33 index chunks). Full structured guide needs AI available.
Page 7
covers key considerations related to the WebSocket protocol. You’ll find out how to establish a WebSocket connection and exchange messa The WebSocket Handboo...
nevitably added on a regular basis to their browsers. This competition for supremacy was a catalyst for fast technological breakthroughs. In 1995, Netscape h...
larly keenly by developers Michael Carter and Ian Hickson. Through collaboration on IRC13 and W3C mailing lists14, they came up with a plan to introduce a ne...
r. The connection will be rejected if the Origin indicated is unacceptable to the server. Table 2.1: Opening handshake headers Some common, optional headers...
there is a need to hide specific details about the policy. 1009 Message too big The endpoint is terminating the connection due to receiving a data frame that...
the WebSocket connection closes. This can be for a variety of reasons, such as a connection failure, a successful closing handshake, or TCP errors. Once the...
y calling get and providing a WebSocket instance later on. Using the newly connected WebSocket instance, we subscribe to that instance’s message event, and p...
efix path on the server URL. The rest of the app/script.js file requires no change. 34 SockJS-client 35 SockJS-node 55 The WebSocket Handbook Chapter 4: Buil...
Support this siteYour recognition and a small knowledge-service contribution help keep this technical work open source.
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