JSON, Files, I/O, HTTP Clients, and Practical Integration Work
Handle the kinds of integration tasks Go is widely used for: JSON processing, file work, and communication with other services.
Inside this chapter
- JSON Encoding and Decoding
- Files and Streams
- HTTP Client Basics
- Resource Management
- Business Example
Series navigation
Study the chapters in order for the clearest path from Golang basics to advanced concurrency, service design, and production engineering. Use the navigation at the bottom to move smoothly through the full tutorial series.
JSON Encoding and Decoding
type Course struct {
Title string `json:"title"`
Level string `json:"level"`
}JSON is central to APIs, configs, message payloads, and service communication. Go’s struct tags make it straightforward to map data between JSON and typed models.
Files and Streams
Go is often used for utilities that read logs, process files, transform exports, or stream data between systems. The language’s standard I/O abstractions support these tasks well.
HTTP Client Basics
resp, err := http.Get("https://example.com/api/health")Calling external services is common in modern backends. Go developers need to understand request timeouts, response handling, retries, and error propagation when integrating with remote systems.
Resource Management
One of the important Go habits is closing resources properly, such as response bodies or file handles. This matters for performance and reliability, especially in long-running services.
Business Example
A data-ingestion service might download JSON payloads from a partner API, decode them into structs, transform the records, and write summarized output files for downstream analytics. Go is a strong fit for this kind of integration-heavy workflow.