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Gin Web Framework

Bind header

ShouldBindHeader melakukan bind header request HTTP langsung ke struct menggunakan tag struct header. Ini berguna untuk mengekstrak metadata seperti batas rate API, token autentikasi, atau header domain kustom dari request yang masuk.

package main


import (
  "net/http"


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


type testHeader struct {
  Rate   int    `header:"Rate"`
  Domain string `header:"Domain"`
}


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


  r.GET("/", func(c *gin.Context) {
    h := testHeader{}


    if err := c.ShouldBindHeader(&h); err != nil {
      c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
      return
    }


    c.JSON(http.StatusOK, gin.H{"Rate": h.Rate, "Domain": h.Domain})
  })


  r.Run(":8080")
}

Uji coba

Terminal window
# Pass custom headers
curl -H "Rate:300" -H "Domain:music" http://localhost:8080/
# Output: {"Domain":"music","Rate":300}


# Missing headers -- zero values are used
curl http://localhost:8080/
# Output: {"Domain":"","Rate":0}

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