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Gin Web Framework

Redirect

Gin mendukung redirect HTTP (mengirim klien ke URL berbeda) dan redirect router (meneruskan request secara internal ke handler lain tanpa round-trip ke klien).

Redirect HTTP

Gunakan c.Redirect dengan kode status HTTP yang sesuai untuk mengarahkan klien:

  • 301 (http.StatusMovedPermanently) — resource telah pindah secara permanen. Browser dan mesin pencari memperbarui cache mereka.
  • 302 (http.StatusFound) — redirect sementara. Browser mengikuti tetapi tidak menyimpan URL baru di cache.
  • 307 (http.StatusTemporaryRedirect) — seperti 302, tetapi browser harus mempertahankan metode HTTP asli (berguna untuk redirect POST).
  • 308 (http.StatusPermanentRedirect) — seperti 301, tetapi browser harus mempertahankan metode HTTP asli.
package main


import (
  "net/http"


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


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


  // External redirect (GET)
  router.GET("/old", func(c *gin.Context) {
    c.Redirect(http.StatusMovedPermanently, "https://www.google.com/")
  })


  // Redirect from POST -- use 302 or 307 to preserve behavior
  router.POST("/submit", func(c *gin.Context) {
    c.Redirect(http.StatusFound, "/result")
  })


  // Internal router redirect (no HTTP round-trip)
  router.GET("/test", func(c *gin.Context) {
    c.Request.URL.Path = "/final"
    router.HandleContext(c)
  })


  router.GET("/final", func(c *gin.Context) {
    c.JSON(http.StatusOK, gin.H{"hello": "world"})
  })


  router.GET("/result", func(c *gin.Context) {
    c.String(http.StatusOK, "Redirected here!")
  })


  router.Run(":8080")
}

Uji coba

Terminal window
# GET redirect -- follows to Google (use -L to follow, -I to see headers only)
curl -I http://localhost:8080/old
# Output includes: HTTP/1.1 301 Moved Permanently
# Output includes: Location: https://www.google.com/


# POST redirect -- returns 302 with new location
curl -X POST -I http://localhost:8080/submit
# Output includes: HTTP/1.1 302 Found
# Output includes: Location: /result


# Internal redirect -- handled server-side, client sees final response
curl http://localhost:8080/test
# Output: {"hello":"world"}

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