How to build a RESTful API using Golang and use logging?

When using Golang to build a RESTful API, you can take the following steps: create routes and handle requests. Start the API. Use logging: Configure logging. Use logging in API handlers.

How to use Golang to build a RESTful API and use logging

Introduction

Building a RESTful API is a common task for Go developers. Logging is also crucial for any application. This article will guide you in building a basic RESTful API using Golang and introduce how to implement logging.

Prerequisites

• Go 1.18 or higher
• Text Editor or IDE

Create Project

Create a new Go project:

go mod init golang-restful-api

Build API

1. Routing

Create a new filerouter.go, which contains the route to handle the request:

package main import ( "github.com/gin-gonic/gin" ) func main() { router := gin.Default() router.GET("/ping", func(c *gin.Context) { c.JSON(200, gin.H{ "message": "pong", }) }) router.Run() }

2. Start the API

In themainfunction,gin.Engineis instantiated and a route handler is added that handles GET requests from the/pingroute. It will return message"pong".

Logging

1. Configure logging

Create a new filelogger.go, which contains logging configuration:

package main import ( "log" "os" ) var logger = log.New(os.Stdout, "", 0)

2. Using logging

In the API handler, useloggerto log information:

func main() { // ... router.GET("/ping", func(c *gin.Context) { logger.Println("Received ping request") // ... }) }

Practical case

Use curl to test the API:

curl http://localhost:8080/ping

This will output the following log record:

Received ping request

Conclusion

You have learned how to build a basic RESTful API using Golang with integrated logging. By following these steps, you can build powerful and scalable APIs for your applications.

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