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WebSockets Protocol Explained – Master Web Development

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WebSockets Protocol Explained – Master Web Development

位教师：Packt - Course Instructors

包含在中

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7个模块

深入了解一个主题并学习基础知识。

中级等级

推荐体验

1 周完成

在 10 小时一周

灵活的计划

自行安排学习进度

7个模块

深入了解一个主题并学习基础知识。

中级等级

推荐体验

1 周完成

在 10 小时一周

灵活的计划

自行安排学习进度

您将学到什么

Learn how to establish and manage WebSocket connections in real-time applications.
Understand the WebSocket handshake, headers, and security measures like Sec-WebSocket-Key.
Gain hands-on experience with the WebSocket API to build interactive, event-driven web apps.
Explore WebSocket data frames, including control frames, masking, and efficient payload handling.

您将获得的技能

要了解的详细信息

可分享的证书

添加到您的领英档案

作业

8 项作业

授课语言：英语（English）

了解顶级公司的员工如何掌握热门技能

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Petrobras, TATA, Danone, Capgemini, P&G 和 L'Oreal 的徽标

该课程共有7个模块

Updated in May 2025.

This course now features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. In this course, you will master WebSockets, learning to create real-time, interactive web applications with efficient two-way communication. By the end, you will be able to establish WebSocket connections, handle secure communication, and manage data transfer through WebSocket frames. You’ll also learn how to implement WebSocket headers, use the WebSocket API for event-driven applications, and troubleshoot using tools like Wireshark. Additionally, you will understand the key differences between WebSockets, AJAX, polling, and other real-time communication methods. The course starts with an introduction to core concepts like HTTP, TCP, and WebSockets. You’ll explore their roles in internet communication and the evolution of real-time data exchange. Following this, we’ll dive into opening WebSocket connections, examining the handshake process, headers, and security features such as the Sec-WebSocket-Key. You'll learn how these elements work together to enable seamless communication between clients and servers. Next, we will examine WebSocket data frames, focusing on types, fragmentation, and payload handling. You will also explore WebSockets over HTTP/2 and HTTP/3 and compare them to older technologies like AJAX and Server-Sent Events. By the end of the course, you will be able to integrate WebSockets into web applications and scale them efficiently. This course is designed for developers who want to build real-time, interactive applications. Whether you're new to WebSockets or looking to enhance your expertise, you'll gain the knowledge to implement WebSockets in web applications. It is suitable for anyone familiar with web development basics and requires no prior experience with WebSocket-specific technologies.

In this module, we will introduce WebSockets as a modern communication protocol designed for real-time, two-way communication. We will also explore the foundational concepts of the internet, HTTP, and the evolution of WebSockets. Finally, we will cover the protocol’s history, specifications, and key use cases.

涵盖的内容

14个视频1篇阅读材料1个作业

14个视频总计81分钟

Section Intro3分钟
What Is the Internet?9分钟
What Is the HTTP Protocol9分钟
Using Wireshark to Prove TCP Is Persistent6分钟
AJAX and Comet6分钟
WebSockets Introduction3分钟
WebSocket History and Specifications7分钟
RFCs - Did You Know?3分钟
WebSocket - Use Cases2分钟
WebSockets as a Communications Protocol4分钟
Examining the HTTP protocol using Dev Console and CURL5分钟
Introduction to WebSockets, TCP, and IP10分钟
MTU and Maximum Segment Size5分钟
Summary of TCP and IP3分钟

1篇阅读材料总计10分钟

Full Course Resources10分钟

1个作业总计15分钟

WebSockets Introduction - Assessment15分钟

In this module, we will dive into the networking fundamentals that WebSockets rely on, including TCP/IP layers and the TCP handshake. We will explore the network layer's structure, port handling, and the importance of IP addresses and MAC addresses. Additionally, we will compare traditional socket communication with WebSocket technology.

涵盖的内容

12个视频1个作业

12个视频总计65分钟

TCP Handshake Introduction4分钟
Examining the TCP Handshake in Wireshark5分钟
The TCP/IP model (4 layer model)4分钟
Layer 1: Application Layer5分钟
Layer 2: Transport Layer - Ports5分钟
Example: Creating a Custom Port Number to Establish a Connection1分钟
Layer 2: Transport Layer: Segments and Headers7分钟
Layer 3: Internet Layer6分钟
Layer 4: Network Layer & MAC addresses9分钟
Using Tracert to Analyze Hops, and Network Layer Summary6分钟
Summary - WebSockets and the Network Layers4分钟
Sockets vs WebSockets4分钟

1个作业总计15分钟

WebSocket Networking - Assessment15分钟

In this module, we will walk you through the process of opening a WebSocket connection, including the HTTP handshake and WebSocket-specific headers. You will gain hands-on experience with Base64 encoding, learn about key headers like Sec-WebSocket-Key, and explore how WebSocket is event-driven to support real-time communication.

涵盖的内容

18个视频1个作业

18个视频总计119分钟

Section Intro1分钟
Opening a WebSocket Connection8分钟
The HTTP Handshake Process4分钟
The WebSocket API in the Dev Console and the TCP Handshake10分钟
WebSocket is an Event-Driven API2分钟
End-to-End vs Hop-by-Hop HTTP Headers6分钟
The Upgrade and Connection Headers Explained8分钟
Sec-WebSocket- Headers Introduction10分钟
Sec-WebSocket- Key Header5分钟
Manually Calculating Sec-WebSocket-Key8分钟
Final Words on Sec-WebSocket-Key1分钟
Base64 Encoding - Intro8分钟
Base64 Encoding - Summary and Example8分钟
Fun Example: How to Encode the Rocket Emoji?3分钟
Sec-WebSocket-Accept7分钟
Sec-WebSocket-Protocol12分钟
Sec-WebSocket-Version & Sec-WebSocket-Extensions5分钟
Section Summary & Outro3分钟

1个作业总计15分钟

Opening A WebSocket Connection - Assessment 215分钟

In this module, we will teach you how to leverage the WebSocket API to build interactive real-time web applications. You’ll learn to establish connections, handle events, and send and receive messages through WebSockets. We will also implement error handling and status updates to ensure a seamless user experience in your project.

涵盖的内容

35个视频1个作业

35个视频总计213分钟

Section Intro1分钟
The Client WebSocket Object - Opening a WebSocket Connection8分钟
Project Introduction and Overview3分钟
WebSocket Demo - Building the HTML6分钟
WebSocket Demo - Building the CSS9分钟
WebSocket Server Code - Part 1 - Creating the HTTP server11分钟
WebSocket Server Code - Part 2 - Importing the "websocket" Module Using NPM6分钟
WebSocket Server Code - Part 3 - Spinning Up Our WebSocket Server13分钟
Project: The WebSocket API - Establishing a WebSocket Connection7分钟
WebSockets Are HTTP Compatible5分钟
Example- A Server Can Run Multiple Socket Connections Simultaneously7分钟
WebSocket API - binaryType and bufferedAmount6分钟
WebSocket API - Extensions and Protocols3分钟
Introduction to the readyState Property2分钟
Project Code - Disable Button When Clicked, and Add Dynamic Status Update8分钟
Project: Listen for the Open Event6分钟
Using the "onopen" Event to Change Text Dynamically3分钟
WebSocket Messages and Data - Introduction11分钟
Project: Listening for the Message Event4分钟
Styling Our Table Element4分钟
Project: Listening for the Close Event5分钟
Project: Listening for the Error Event3分钟
Closure Codes and the wasClean Property3分钟
Examining All 4 Values of the readyState Property5分钟
WebSocket API Methods - send() and close()4分钟
The CloseEvent and MessageEvent Interface1分钟
Project: Using the send() Method to Send Data to the Server8分钟
Closing a Connection6分钟
Project: Using the close() Method to Close the WebSocket Connection5分钟
The "Reason" Argument to the close() Method2分钟
Examining the Closing Handshake at the TCP & WebSocket Level3分钟
Challenge: Improve Project Code5分钟
Solution: Amending Project Code to Handle Different Closure Types9分钟
Using the Switch Expression to Improve Code3分钟
Fun Lecture - Examining Live Server WebSocket Code11分钟

1个作业总计15分钟

Using the WebSocket API - Assessment15分钟

In this module, we will focus on the structure of WebSocket data frames and their role in communication. We’ll cover the different frame types, including control and non-control frames, and explore security features like masking. Additionally, we’ll delve into data fragmentation and payload sizes to better understand how WebSockets handle large volumes of data.

涵盖的内容

21个视频1个作业

21个视频总计123分钟

Section Intro2分钟
How HTTP/1.1 Handles Data13分钟
How HTTP/2 Handles Data6分钟
Capturing SSL/TLS Keys and Configuring Wireshark to Capture HTTP/2 Traffic7分钟
HTTP/2 Binary Frames - Intro to How the HTTP/2 Protocol Is Negotiated5分钟
HTTP/2 Binary Frames - Intro to HPACK8分钟
HTTP/2 Binary Frames - What a Frame Looks Like4分钟
WebSocket Frames - The 6 Types3分钟
Examining a WebSocket Closure Frame - Opcode 0x87分钟
Examining a WebSocket Ping Frame - Opcode 0x98分钟
WebSocket Frame Header Size - Min and Max7分钟
WebSocket Data Fragmentation5分钟
What Are WebSocket Reserved Bits Used For?1分钟
Control and Non-Control Frames3分钟
Masking Bit2分钟
Masking - Introduction9分钟
Example of Cache Poisoning6分钟
Payload Length Bits3分钟
Maximum Size of a WebSocket Frame Payload3分钟
HTTP vs WebSockets6分钟
Outro2分钟

1个作业总计15分钟

WebSocket Data Frames - Assessment15分钟

In this module, we will explore the alternatives to WebSockets, including AJAX, short and long polling, and Server-Sent Events (SSE). You’ll also learn about CORS security mechanisms, the challenges of using WebSockets over different HTTP versions, and the best practices for scaling WebSocket connections to support high-demand environments.

涵盖的内容

9个视频1个作业

9个视频总计57分钟

Misconceptions About Concurrent WebSocket Connections8分钟
Short Polling - An Alternative to WebSockets6分钟
Long Polling - An Alternative to WebSockets5分钟
Server-Sent Events - An Alternative to WebSockets4分钟
WebSockets Over HTTP/212分钟
Does HTTP/2 Replace WebSockets?6分钟
WebSockets Over HTTP/33分钟
CORS and WebSockets4分钟
Scaling WebSockets5分钟

1个作业总计15分钟

AJAX, Polling, Server-Sent Events, and CORS - Assessment15分钟

In this final module, we will recap all the core concepts covered in the course. We’ll review the practical applications of WebSockets, emphasizing how they can be used to build real-time, scalable, and interactive web applications. This is your opportunity to solidify your understanding and prepare for implementing WebSockets in future projects.

涵盖的内容

1个视频2个作业

位教师

Packt - Course Instructors

Packt

1,186 门课程291,155 名学生

提供方

Packt

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