How to access headers and cookies 🤗

[ManojKumarChauhan]

Question description How to access headers and cookies from fiber's request and response. Code snippet Optional

package main

import "github.com/gofiber/fiber/v2"

func main() {
  app := fiber.New()
  // ..
}

I have following function where fiber context is passed func handle(c *fiber.Ctx) { }

I can access request headers using following code req := c.Request() headerString := req.Header.GetHeaders()

But I didn't find the code to access response header.

Also I didn't find any code to print all the cookies from fiber's request/response.

Can someone suggest?

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[ReneWerner87]

https://docs.gofiber.io/api/ctx#response https://docs.gofiber.io/api/ctx#request

short methods for request header access https://docs.gofiber.io/api/ctx#get short methods for response header access https://docs.gofiber.io/api/ctx#getrespheader

cookie https://docs.gofiber.io/api/ctx#cookies

[ManojKumarChauhan]

As per https://docs.gofiber.io/api/ctx#getrespheader, if we know the header name then we can pick its value. I don't have header name and need some method which returns the name for all headers in response. Similarly, I need a function which returns all the cookies from request/response header.

[ReneWerner87]

app.Get("/test", func(ctx *fiber.Ctx) error {
        // request
        ctx.Request().Header.VisitAll(func(key, value []byte) {
            fmt.Println("req headerKey", string(key), "value", string(value))
        })

        ctx.Request().Header.VisitAllCookie(func(key, value []byte) {
            fmt.Println("req cookieKey", string(key), "value", string(value))
        })

        // response
        ctx.Response().Header.VisitAll(func(key, value []byte) {
            fmt.Println("res headerKey", string(key), "value", string(value))
        })

        ctx.Response().Header.VisitAllCookie(func(key, value []byte) {
            fmt.Println("res cookieKey", string(key), "value", string(value))
        })

        return ctx.SendStatus(fiber.StatusOK)
    })

[ManojKumarChauhan]

Hi @ReneWerner87 , using above code for response header, i am able to get "Content-Type" only. Not able to get Content-Length. What about the case if response header also contains other keys like content-encoding etc? Will above function return other response headers also?

[ReneWerner87]

the header for the length of the content is set by fasthttp at the end, automatically

could show you how to set it manually, but i think we don't need that

yes all other headers you get like this

[ManojKumarChauhan]

Thanks

[chalukyaj]

Not sure who this might help, but a simpler method to just get one header is ctx.Fasthttp.Request.Header.Peek("header-name")

[yangqingrong]

token := c.GetReqHeaders()["Token"]

it don't support UTF-8 chars

eg:

curl -X 'POST' \
  'http://127.0.0.1:8080/api/test/token' \
  -H 'accept: application/json' \
  -H 'Token: testUtf-8中文' \
  -d ''

output:

Undocumented | TypeError: Failed to execute 'fetch' on 'Window': Failed to read the 'headers' property from 'RequestInit': String contains non ISO-8859-1 code point.