edge-connect-client/sdk/client/auth.go

// ABOUTME: Authentication providers for EdgeXR Master Controller API
// ABOUTME: Supports Bearer token authentication with pluggable provider interface

package client

import (
	"context"
	"net/http"
)

// AuthProvider interface for attaching authentication to requests
type AuthProvider interface {
	// Attach adds authentication headers to the request
	Attach(ctx context.Context, req *http.Request) error
}

// StaticTokenProvider implements Bearer token authentication with a fixed token
type StaticTokenProvider struct {
	Token string
}

// NewStaticTokenProvider creates a new static token provider
func NewStaticTokenProvider(token string) *StaticTokenProvider {
	return &StaticTokenProvider{Token: token}
}

// Attach adds the Bearer token to the request Authorization header
func (s *StaticTokenProvider) Attach(ctx context.Context, req *http.Request) error {
	if s.Token != "" {
		req.Header.Set("Authorization", "Bearer "+s.Token)
	}
	return nil
}

// NoAuthProvider implements no authentication (for testing or public endpoints)
type NoAuthProvider struct{}

// NewNoAuthProvider creates a new no-auth provider
func NewNoAuthProvider() *NoAuthProvider {
	return &NoAuthProvider{}
}

// Attach does nothing (no authentication)
func (n *NoAuthProvider) Attach(ctx context.Context, req *http.Request) error {
	return nil
}