golang framework source code source code reading notes

Answer: Gin Framework Guide: Based on the net/http package, providing middleware, routers and utility functions. Speed, scalability and customizability. Middleware is executed before and after request processing and can be used for authentication, logging, etc. Routers are used to define application routes, handle requests and return responses. Practical example: By registering the middleware and defining a handler, you create a simple application that executes custom middleware logic before processing the request.

Go framework source code reading notes: Exploring the mysteries of the Gin framework

Introduction

Gin is a lightweight, high-performance Go web framework that is widely praised among developers. By reading its source code, we can gain an in-depth understanding of the design patterns of the Go framework and how to use Go to write high-quality web applications.

Gin Framework Introduction

The Gin framework is based on the net/http package and provides a series of middleware, routers and utility functions to simplify the web development process. It is known for its speed, scalability, and customizability.

Middleware

Middleware is the core of the Gin framework. They are a series of functions that are executed before or after processing a request. Middleware can be used for various purposes such as authentication, logging, caching, etc. Here is a simple example that can demonstrate Gin middleware:

func Middleware(c *gin.Context) {
    // 执行自定义逻辑
    fmt.Println("Middleware 执行中...")
    c.Next()
}

router

Gin framework's router allows you to define different routes in your application. It provides a flexible way to handle requests and return appropriate responses. The following is an example of how to use Gin to define routes:

func main() {
    router := gin.Default()
    
    router.GET("/", func(c *gin.Context) {
        c.String(200, "Hello, World!")
    })
    
    router.Run()
}

Practical case

package main

import (
    "github.com/gin-gonic/gin"
)

func main() {
    router := gin.Default()
    
    router.Use(Middleware) // 注册中间件
    
    router.GET("/", func(c *gin.Context) {
        c.String(200, "Hello, World!")
    })
    
    router.Run()
}

func Middleware(c *gin.Context) {
    // 执行自定义逻辑
    fmt.Println("Middleware 执行中...")
    c.Next()
}

By registering the middleware in the main function and defining the handler using Gin's router , we created a simple Gin application that executes custom middleware logic before processing requests.

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