Rust from Sockets to Servers

Building a High-Performance Web Server in Rust from First Principles

Introduction: Why Build Your Own Server?

1. What You Will Build
2. Prerequisites and Setup
3. The Architecture at a Glance
4. How to Read This Book

Chapter 1: Networking Fundamentals

1. The Internet Protocol Stack
2. IP Addresses and Ports
3. TCP Connections and the Three-Way Handshake
4. Raw Sockets in Rust
5. Your First Listening Socket
6. Exercise: Echo Server

Chapter 2: Understanding HTTP/1.1

1. Anatomy of an HTTP Request
2. Anatomy of an HTTP Response
3. HTTP Methods and Status Codes
4. Parsing the First Request
5. Sending Your First Response
6. Exercise: Minimal HTTP Server

Chapter 3: Asynchronous Programming with Tokio

1. The Problem with Blocking I/O
2. Futures and the Event Loop
3. Tokio Runtime Architecture
4. Async TCP Listeners
5. Spawning Concurrent Tasks
6. Exercise: Async Echo Server

Chapter 4: Building the Request and Response Types

1. The HttpRequest Struct
2. Parsing Headers into a HashMap
3. The HttpResponse Struct
4. Status Code Enum
5. Converting to Wire Format
6. Exercise: Round-Trip Request/Response

Chapter 5: Connection Handling and Keep-Alive

1. The Connection Lifecycle
2. HTTP Keep-Alive Semantics
3. Reading Multiple Requests Per Connection
4. Timeout and Idle Connection Management
5. Backpressure and Flow Control
6. Exercise: Persistent Connection Server

Chapter 6: Routing and Endpoint Registration

1. The Router Data Structure
2. Exact Path Matching
3. Parameterized Routes
4. Method Dispatching
5. Handler Traits and Closures
6. Exercise: Multi-Route Server

Chapter 7: Middleware and the Request Pipeline

1. The Middleware Pattern
2. Building a Middleware Chain
3. Common Middleware: Logging and Timing
4. CORS Middleware
5. Error Handling Middleware
6. Exercise: Custom Rate Limiter

Chapter 8: Static File Serving

1. Detecting Static Routes
2. Reading Files Asynchronously
3. MIME Type Detection
4. Content-Encoding and Compression
5. Cache-Control and ETag Headers
6. Exercise: Production Static Server

Chapter 9: Templating and Dynamic HTML

1. Why Server-Side Rendering Still Matters
2. The Tera Template Engine
3. Passing Context Data
4. Layouts and Partials
5. Security: Escaping and XSS Prevention
6. Exercise: Blog Frontend

Chapter 10: Building REST APIs

1. REST Design Principles
2. JSON Serialization with serde
3. The In-Memory Store Pattern
4. CRUD Endpoint Implementation
5. Error Responses and Validation
6. Exercise: Task Manager API

Chapter 11: Concurrency Patterns and Performance

1. Tokio’s Work-Stealing Scheduler
2. Channels for Inter-Task Communication
3. Shared State with Arc and Mutex
4. Connection Limits and Graceful Shutdown
5. Load Testing with wrk
6. Exercise: Stress-Tested Server

Chapter 12: HTTP/2 Fundamentals

1. Why HTTP/2
2. Binary Framing and Multiplexing
3. HPACK Header Compression
4. The h2 Crate
5. Upgrading from HTTP/1.1 to HTTP/2
6. Exercise: Dual-Protocol Server

Chapter 13: TLS and HTTPS

1. Why Encryption Matters
2. The TLS Handshake
3. Generating Self-Signed Certificates
4. Rustls vs native-tls
5. Integrating TLS with Tokio
6. Exercise: HTTPS Server

Chapter 14: Security Hardening

1. Common HTTP Attacks
2. Security Headers
3. Input Validation and Request Size Limits
4. Rate Limiting Implementation
5. Content Security Policy
6. Exercise: Security Audit Checklist

Chapter 15: Testing, Benchmarking, and Logging

1. Unit Testing Handlers and Routes
2. Integration Tests with Test Clients
3. Property-Based Testing for Parsers
4. Structured Logging with tracing
5. Benchmarking with criterion
6. Exercise: Test Suite

Chapter 16: Performance Optimization and Deployment

1. Profiling with flamegraphs
2. Memory Allocation Strategies
3. Connection Pooling
4. Docker Containerization
5. Reverse Proxy with Caddy or Nginx
6. Exercise: Production Deployment

Conclusion: What Comes Next

1. Recap of the Architecture
2. Extending Your Server
3. When Frameworks Make Sense
4. Continuing Your Rust Journey

References