feat: add token auth support for event sink (#3197)

feat: add token auth and custom headers support for http event sink

fixes issue #3187

Signed-off-by: Ramkumar Chinchani <rchincha.dev@gmail.com>

Author: rchincha

pkg/extensions/config/events/config.go

@@ -40,12 +40,14 @@ type SinkConfig struct {
 	Channel string
 	Timeout time.Duration
 	Proxy   *string
+	Headers map[string]string
 }
 
 type Credentials struct {
 	Username string
 	Password string
 	File     *string
+	Token    string
 }
 
 type TLSConfig struct {

pkg/extensions/events/http_sink.go

@@ -41,9 +41,20 @@ func NewHTTPSink(config eventsconf.SinkConfig) (*HTTPSink, error) {
 		cehttp.WithClient(*httpClient),
 	}
 
-	if config.Credentials != nil && config.Credentials.Username != "" {
-		opts = append(opts, cehttp.WithHeader("Authorization",
-			"Basic "+BasicAuth(config.Credentials.Username, config.Credentials.Password)))
+	if config.Credentials != nil {
+		if config.Credentials.Username != "" {
+			opts = append(opts, cehttp.WithHeader("Authorization",
+				"Basic "+BasicAuth(config.Credentials.Username, config.Credentials.Password)))
+		} else if config.Credentials.Token != "" {
+			opts = append(opts, cehttp.WithHeader("Authorization",
+				"Bearer "+config.Credentials.Token))
+		}
+	}
+
+	if config.Headers != nil {
+		for key, value := range config.Headers {
+			opts = append(opts, cehttp.WithHeader(key, value))
+		}
 	}
 
 	// Create CloudEvents HTTP protocol

pkg/extensions/events/http_sink_test.go

@@ -63,6 +63,34 @@ func TestHTTPSink(t *testing.T) {
 		So(sink, ShouldNotBeNil)
 	})
 
+	Convey("NewHTTPSink handles token auth config", t, func() {
+		cfg := eventsconf.SinkConfig{
+			Type:    eventsconf.HTTP,
+			Address: "http://localhost",
+			Credentials: &eventsconf.Credentials{
+				Token: "thisisamocktoken",
+			},
+		}
+
+		sink, err := events.NewHTTPSink(cfg)
+		So(err, ShouldBeNil)
+		So(sink, ShouldNotBeNil)
+	})
+
+	Convey("NewHTTPSink handles custom headers config", t, func() {
+		cfg := eventsconf.SinkConfig{
+			Type:    eventsconf.HTTP,
+			Address: "http://localhost",
+			Headers: map[string]string{
+				"X-Tenant-ID": "tenant-abc123",
+			},
+		}
+
+		sink, err := events.NewHTTPSink(cfg)
+		So(err, ShouldBeNil)
+		So(sink, ShouldNotBeNil)
+	})
+
 	Convey("GetHTTPClientForConfig returns error for invalid proxy", t, func() {
 		badProxy := "://bad-url"
 		cfg := eventsconf.SinkConfig{