Use built-in basic auth support as it no longer requires JAX-B

Closes gh-28829

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfiguration.java

@@ -16,21 +16,16 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus;
 
-import java.io.IOException;
-import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
-import java.nio.charset.StandardCharsets;
 import java.time.Duration;
-import java.util.Base64;
 import java.util.Map;
 
 import io.micrometer.core.instrument.Clock;
 import io.micrometer.prometheus.PrometheusConfig;
 import io.micrometer.prometheus.PrometheusMeterRegistry;
 import io.prometheus.client.CollectorRegistry;
-import io.prometheus.client.exporter.DefaultHttpConnectionFactory;
-import io.prometheus.client.exporter.HttpConnectionFactory;
+import io.prometheus.client.exporter.BasicAuthHttpConnectionFactory;
 import io.prometheus.client.exporter.PushGateway;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -159,29 +154,4 @@ public class PrometheusMetricsExportAutoConfiguration {
 
 	}
 
-	static class BasicAuthHttpConnectionFactory implements HttpConnectionFactory {
-
-		private final HttpConnectionFactory delegate = new DefaultHttpConnectionFactory();
-
-		private final String authorizationHeader;
-
-		BasicAuthHttpConnectionFactory(String username, String password) {
-			this.authorizationHeader = "Basic " + new String(
-					Base64.getEncoder().encode(new String(username + ":" + password).getBytes(StandardCharsets.UTF_8)),
-					StandardCharsets.UTF_8);
-		}
-
-		String getAuthorizationHeader() {
-			return this.authorizationHeader;
-		}
-
-		@Override
-		public HttpURLConnection create(String url) throws IOException {
-			HttpURLConnection connection = this.delegate.create(url);
-			connection.setRequestProperty("Authorization", this.authorizationHeader);
-			return connection;
-		}
-
-	}
-
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfigurationTests.java

@@ -20,6 +20,7 @@ import io.micrometer.core.instrument.Clock;
 import io.micrometer.prometheus.PrometheusConfig;
 import io.micrometer.prometheus.PrometheusMeterRegistry;
 import io.prometheus.client.CollectorRegistry;
+import io.prometheus.client.exporter.BasicAuthHttpConnectionFactory;
 import io.prometheus.client.exporter.DefaultHttpConnectionFactory;
 import io.prometheus.client.exporter.HttpConnectionFactory;
 import io.prometheus.client.exporter.PushGateway;
@@ -27,7 +28,6 @@ import org.assertj.core.api.ThrowingConsumer;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 
-import org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus.PrometheusMetricsExportAutoConfiguration.BasicAuthHttpConnectionFactory;
 import org.springframework.boot.actuate.autoconfigure.web.server.ManagementContextAutoConfiguration;
 import org.springframework.boot.actuate.metrics.export.prometheus.PrometheusPushGatewayManager;
 import org.springframework.boot.actuate.metrics.export.prometheus.PrometheusScrapeEndpoint;
@@ -192,11 +192,8 @@ class PrometheusMetricsExportAutoConfigurationTests {
 						"management.metrics.export.prometheus.pushgateway.username=admin",
 						"management.metrics.export.prometheus.pushgateway.password=secret")
 				.withUserConfiguration(BaseConfiguration.class)
-				.run(hasHttpConnectionFactory((httpConnectionFactory) -> {
-					assertThat(httpConnectionFactory).isInstanceOf(BasicAuthHttpConnectionFactory.class);
-					assertThat(((BasicAuthHttpConnectionFactory) httpConnectionFactory).getAuthorizationHeader())
-							.isEqualTo("Basic YWRtaW46c2VjcmV0");
-				}));
+				.run(hasHttpConnectionFactory((httpConnectionFactory) -> assertThat(httpConnectionFactory)
+						.isInstanceOf(BasicAuthHttpConnectionFactory.class)));
 	}
 
 	private void hasGatewayURL(AssertableApplicationContext context, String url) {