golang gin何时使用收件箱上下文以及何时重定向

不同之处在于，HandleContext()执行客户端从未注意到的internal redirection，而Redirect()实际上向https客户端发送响应，通知其资源已更改.

我认为通过观察浏览器的DevTools可以最好地说明这一点.

HandleContext(): As you can see, here the client never even noticed that the request was redirected to another handler internally.

Redirect(): Here the client was forced to make two requests to get the actual resource. Also notice that the URL bar now displays the URL of the redirected request.

显然是two requests leads to worse performance，这就是为什么内部重定向应该首选router.HandleContext().

如果您想测试自己，请参阅以下代码:

package main

import (
    "net/http"

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

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

    // Switch the uncommented block in order to see the effect of HandleContext.
    /* r.GET("/test", func(c *gin.Context) {
        c.Request.URL.Path = "/test2"
        r.HandleContext(c)
    })
    r.GET("/test2", func(c *gin.Context) {
        c.JSON(200, gin.H{"hello": "world"})
    }) */

    r.GET("/test", func(c *gin.Context) {
        c.Redirect(http.StatusMovedPermanently, "/test2")
    })
    r.GET("/test2", func(c *gin.Context) {
        c.JSON(200, gin.H{"hello": "world"})
    })

    r.Run()
}