gin-gonic

When to use this skill

Use this skill whenever the user wants to:

• Build Go HTTP services or REST APIs with Gin-Gonic
• Configure routing, route groups, and middleware
• Implement request binding, validation, and JSON responses
• Set up authentication, logging, or CORS middleware
• Deploy Gin applications with graceful shutdown

How to use this skill

Workflow

1. Initialize the router - gin.Default() includes Logger and Recovery middleware
2. Define routes - Group related routes and attach handlers
3. Bind and validate - Use ShouldBindJSON or ShouldBindQuery with struct tags
4. Return responses - Use c.JSON() for consistent API responses

Quick-Start Example: REST API with Middleware

package main

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

type CreateUserRequest struct {
    Name  string `json:"name" binding:"required,min=2"`
    Email string `json:"email" binding:"required,email"`
}

func main() {
    r := gin.Default()

    // Route group with auth middleware
    api := r.Group("/api/v1")
    {
        api.POST("/users", createUser)
        api.GET("/users/:id", getUser)
    }

    r.Run(":8080")
}

func createUser(c *gin.Context) {
    var req CreateUserRequest
    if err := c.ShouldBindJSON(&req); err != nil {
        c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
        return
    }
    // ... create user logic
    c.JSON(http.StatusCreated, gin.H{"name": req.Name, "email": req.Email})
}

func getUser(c *gin.Context) {
    id := c.Param("id")
    c.JSON(http.StatusOK, gin.H{"id": id})
}

Best Practices

1. Use route groups - Group routes by version or resource (/api/v1/users)
2. Validate with struct tags - Use binding:"required,email" for declarative validation
3. Centralize error handling - Use middleware to catch panics and return consistent error JSON
4. Graceful shutdown - Use http.Server with srv.Shutdown(ctx) for clean connection draining
5. Avoid gin.Default() in production - Use gin.New() and add only the middleware you need

Resources

• Official Docs: https://gin-gonic.com/docs/

Keywords

gin-gonic, gin, Go, web framework, REST API, routing, middleware, JSON binding, 路由, 中间件