🌐 Chapter 7 – HTTP Services

Welcome to Chapter 7 of the Practice Golang for Beginners mentorship program.

In this chapter, we move from core language concepts into real-world backend development by building HTTP services using Go. This is where Go truly shines in production environments, especially in cloud-native and microservices architectures.

🎯 Learning Objectives

By the end of this chapter, you will be able to:

Build HTTP servers using Go’s standard library (net/http)
Design and implement RESTful APIs
Work with JSON encoding and decoding
Structure handlers and middleware cleanly
Implement logging and request tracing basics
Write and test HTTP handlers effectively
Handle graceful shutdown of services

🧠 Why This Chapter Matters

Most real-world Go applications are:

Backend services
Microservices
APIs serving high-performance workloads

Understanding HTTP services in Go will enable you to:

Contribute to production systems
Build scalable backend services
Work with cloud-native platforms like Kubernetes and OpenShift

📚 Chapter Structure

This chapter is divided into the following sections:

📖 Study Material

Core concepts and explanations with examples:

net/http fundamentals
Handlers and routing
JSON processing
Middleware patterns
Logging and observability basics

🧪 Testing HTTP Services

Learn how to:

Test HTTP handlers
Use httptest
Write table-driven API tests
Validate responses and status codes

🧩 Exercises

Hands-on practice to reinforce learning:

Build simple endpoints
Add middleware
Handle request/response flows
Improve existing implementations

📝 Assessment

Evaluate your understanding through:

Conceptual questions
Scenario-based problems
Debugging challenges

✅ Solutions

Detailed and idiomatic solutions:

Clean and production-style code
Explanations for design decisions
Best practices highlighted

💬 Weekly Discussion Questions

Designed for mentor-led discussions:

Design trade-offs
Real-world scenarios
Performance considerations

🚀 Mini Project – HTTP Service

Build a complete service by applying all concepts:

REST API with multiple endpoints
Middleware integration
Logging and error handling
Basic production readiness

🛠️ Prerequisites

Before starting this chapter, you should be comfortable with:

Structs, interfaces, and error handling
Slices, maps, and pointers
Basic concurrency concepts (goroutines and channels)

📅 Suggested Weekly Plan

Day	Focus Area
Day 1–2	Study Material
Day 3–4	Exercises + Testing
Day 5	Assessment + Review
Friday	Mentor Discussion & Feedback

💡 Mentor Notes

Focus on clarity over complexity
Encourage writing small, testable handlers
Reinforce idiomatic Go practices
Discuss real-world usage patterns

📌 Key Takeaway

This chapter bridges the gap between:

“Learning Go” → “Building real backend services in Go”

Mastering this will significantly increase your confidence in working on production-grade Go applications.

👨‍💻 Maintained by Aditya Pratap Bhuyan 📜 Licensed under GNU GPL v3