Fiber: 🤔 How can i get response body after Next()

[ferdigokdemir]

Example for Gin framework here. How can do this in fiber?

package main

import (
    "bytes"
    "fmt"

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

type responseBodyWriter struct {
    gin.ResponseWriter
    body *bytes.Buffer
}

func (r responseBodyWriter) Write(b []byte) (int, error) {
    r.body.Write(b)
    return r.ResponseWriter.Write(b)
}

func logResponseBody(c *gin.Context) {
    w := &responseBodyWriter{body: &bytes.Buffer{}, ResponseWriter: c.Writer}
    c.Writer = w
    c.Next()
    fmt.Println("Response body: " + w.body.String())
}

func sayHello(c *gin.Context) {
    c.JSON(200, gin.H{
        "hello": "privationel",
    })
}

func main() {
    r := gin.Default()
    r.Use(logResponseBody)
    r.GET("/", sayHello)
    r.Run()
}

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[Fenny]

Hi @ferdigokdemir, you can still access the Fasthttp core properties if you want to visit the response body.

c.Fasthttp.Response.Body()

[ferdigokdemir]

Hi @ferdigokdemir, you can still access the Fasthttp core properties if you want to visit the response body.

c.Fasthttp.Response.Body()

Like this?

app.Use(func(c *fiber.Ctx) {
        c.Next()
        print(c.Fasthttp.Response.Body())
    })

[ferdigokdemir]

Hi @ferdigokdemir, you can still access the Fasthttp core properties if you want to visit the response body.

c.Fasthttp.Response.Body()

Working! thanks a lot.
But i have a another problem. When i activate gzip, body returning byte array :)
I disable it, and i can see json response.
Must i disable gzip? have a another fix for this?

Example byte array response here

[ferdigokdemir]

I found a solution :) c.Fasthttp.Response.BodyGunzip() for gzip body.

    app.Use(func(c *fiber.Ctx) {
        c.Next()
        body, err := c.Fasthttp.Response.BodyGunzip()
        if err != nil {
            log.Println(err)
        }
        log.Println(string(body))
    })

[ferdigokdemir]

Fixed!