Go语言之gin框架源码学习
gin 框架路由注册与路由匹配、中间件
package main
import (
"fmt"
"github.com/gin-gonic/gin"
"net/http"
)
func func1(c *gin.Context) {
fmt.Println("func1")
}
func func2(c *gin.Context) {
fmt.Println("func2 before")
c.Next()
fmt.Println("func2 after")
}
func func3(c *gin.Context) {
fmt.Println("func3")
//c.Abort()
}
func func4(c *gin.Context) {
fmt.Println("func4")
c.Set("name", "test")
}
func func5(c *gin.Context) {
fmt.Println("func5")
v, ok := c.Get("name")
if ok {
vStr := v.(string) // 类型转换
fmt.Println("vStr", vStr)
}
}
func main() {
r := gin.Default()
r.GET("/hello", func(c *gin.Context) {
c.String(http.StatusOK, "ok")
})
shopGroup := r.Group("/shop", func1, func2) // 针对当前路由组生效的中间件
shopGroup.Use(func3)
{
shopGroup.GET("/index", func4, func5)
}
r.Run()
}
运行
Code/go/gin_demo via 🐹 v1.20.3 via 🅒 base
➜ go run main.go
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env: export GIN_MODE=release
- using code: gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET /hello --> main.main.func1 (3 handlers)
[GIN-debug] GET /shop/index --> main.func5 (7 handlers)
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
[GIN-debug] Environment variable PORT is undefined. Using port :8080 by default
[GIN-debug] Listening and serving HTTP on :8080
func1
func2 before
func3
func4
func5
func2 after
[GIN] 2023/06/10 - 18:14:44 | 200 | 24.167µs | ::1 | GET "/shop/index"
[GIN] 2023/06/10 - 18:14:44 | 404 | 1.292µs | ::1 | GET "/favicon.ico"
^Csignal: interrupt
Code/go/gin_demo via 🐹 v1.20.3 via 🅒 base took 2m 12.5s
➜ go run main.go
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env: export GIN_MODE=release
- using code: gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET /hello --> main.main.func1 (3 handlers)
[GIN-debug] GET /shop/index --> main.func5 (7 handlers)
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
[GIN-debug] Environment variable PORT is undefined. Using port :8080 by default
[GIN-debug] Listening and serving HTTP on :8080
func1
func2 before
func3
func2 after
[GIN] 2023/06/10 - 18:16:06 | 200 | 46.792µs | ::1 | GET "/shop/index"
^Csignal: interrupt
Code/go/gin_demo via 🐹 v1.20.3 via 🅒 base took 5m 4.4s
➜ go run main.go
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env: export GIN_MODE=release
- using code: gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET /hello --> main.main.func1 (3 handlers)
[GIN-debug] GET /shop/index --> main.func5 (7 handlers)
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
[GIN-debug] Environment variable PORT is undefined. Using port :8080 by default
[GIN-debug] Listening and serving HTTP on :8080
func1
func2 before
func3
func2 after
[GIN] 2023/06/10 - 18:21:12 | 200 | 44.917µs | ::1 | GET "/shop/index"
^Csignal: interrupt
Code/go/gin_demo via 🐹 v1.20.3 via 🅒 base took 22.0s
➜ go run main.go
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
- using env: export GIN_MODE=release
- using code: gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET /hello --> main.main.func1 (3 handlers)
[GIN-debug] GET /shop/index --> main.func5 (7 handlers)
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
[GIN-debug] Environment variable PORT is undefined. Using port :8080 by default
[GIN-debug] Listening and serving HTTP on :8080
func1
func2 before
func3
func4
func5
vStr test
func2 after
[GIN] 2023/06/10 - 18:21:34 | 200 | 55.666µs | ::1 | GET "/shop/index"
访问：http://localhost:8080/shop/index
