SetAuthScheme("") doesn't remove default prefix "Bearer "

[biggerevil]

In my case, I needed to send a token without any prefixes. I attempted to achieve this by using SetAuthScheme(""), but it still added the "Bearer " prefix. The only workaround I found was to set the Authorization header explicitly instead of using SetAuthToken().

I'm not sure if this is considered a bug, but I found the behavior unexpected. It took me some time to diagnose why my code wasn't working as expected.

Here is an example:

package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/go-resty/resty/v2"
)

func main() {
	// Start a local HTTP server in the background
	go func() {
		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
			fmt.Println("Authorization header:", r.Header.Get("Authorization"))
			w.WriteHeader(http.StatusOK)
			_, _ = w.Write([]byte("OK"))
		})
		log.Fatal(http.ListenAndServe(":8080", nil))
	}()

	fmt.Println("1) Resty without setting auth scheme:")
	resty.New().
		SetAuthToken("MY_SUPER_SECRET_TOKEN").
		R().Get("http://localhost:8080/")
	fmt.Println()

	fmt.Println("2) Resty with setting auth scheme to \"\":")
	resty.New().
		SetAuthScheme("").
		SetAuthToken("MY_SUPER_SECRET_TOKEN").
		R().Get("http://localhost:8080/")
	fmt.Println()

	fmt.Println("3) Resty with setting header Authorization:")
	resty.New().
		SetHeader("Authorization", "MY_SUPER_SECRET_TOKEN").
		R().Get("http://localhost:8080/")
	fmt.Println()
}

Output:

1) Resty without setting auth scheme:
Authorization header: Bearer MY_SUPER_SECRET_TOKEN

2) Resty with setting auth scheme to "":
Authorization header: Bearer MY_SUPER_SECRET_TOKEN

3) Resty with setting header Authorization:
Authorization header: MY_SUPER_SECRET_TOKEN

[jeevatkm]

@biggerevil Thanks for reaching out. I will analyze the SetAuthScheme behavior and get back to you.

[jeevatkm]

@biggerevil I have added a fix, it is currently available in the branch fix-auth-scheme-override-empty. Can you try and share feedback?

[biggerevil]

@jeevatkm works like a charm, thanks a lot!