Fix URI tag on RestTemplate requests based on URIs

Move leading slash logic from `MetricsClientHttpRequestInterceptor` to
`RestTemplateExchangeTags` so that URI based calls are also managed.

Closes gh-12126

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/client/MetricsClientHttpRequestInterceptor.java

@@ -93,14 +93,9 @@ class MetricsClientHttpRequestInterceptor implements ClientHttpRequestIntercepto
 
 	private Timer.Builder getTimeBuilder(HttpRequest request,
 			ClientHttpResponse response) {
-		String url = ensureLeadingSlash(urlTemplate.get());
 		return Timer.builder(this.metricName)
-				.tags(this.tagProvider.getTags(url, request, response))
+				.tags(this.tagProvider.getTags(urlTemplate.get(), request, response))
 				.description("Timer of RestTemplate operation");
 	}
 
-	private String ensureLeadingSlash(String url) {
-		return (url == null || url.startsWith("/") ? url : "/" + url);
-	}
-
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/client/RestTemplateExchangeTags.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,7 +55,7 @@ public final class RestTemplateExchangeTags {
 	 * @return the uri tag
 	 */
 	public static Tag uri(HttpRequest request) {
-		return Tag.of("uri", stripUri(request.getURI().toString()));
+		return Tag.of("uri", ensureLeadingSlash(stripUri(request.getURI().toString())));
 	}
 
 	/**
@@ -65,13 +65,17 @@ public final class RestTemplateExchangeTags {
 	 */
 	public static Tag uri(String uriTemplate) {
 		String uri = StringUtils.hasText(uriTemplate) ? uriTemplate : "none";
-		return Tag.of("uri", stripUri(uri));
+		return Tag.of("uri", ensureLeadingSlash(stripUri(uri)));
 	}
 
 	private static String stripUri(String uri) {
 		return uri.replaceAll("^https?://[^/]+/", "");
 	}
 
+	private static String ensureLeadingSlash(String url) {
+		return (url == null || url.startsWith("/") ? url : "/" + url);
+	}
+
 	/**
 	 * Creates a {@code status} {@code Tag} derived from the
 	 * {@link ClientHttpResponse#getRawStatusCode() status} of the given {@code response}.

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/client/MetricsRestTemplateCustomizerTests.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.actuate.metrics.web.client;
 
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.util.stream.StreamSupport;
 
 import io.micrometer.core.instrument.MeterRegistry;
@@ -99,4 +101,18 @@ public class MetricsRestTemplateCustomizerTests {
 		this.mockServer.verify();
 	}
 
+	@Test
+	public void interceptRestTemplateWithUri() throws URISyntaxException {
+		this.mockServer
+				.expect(MockRestRequestMatchers.requestTo("http://localhost/test/123"))
+				.andExpect(MockRestRequestMatchers.method(HttpMethod.GET))
+				.andRespond(MockRestResponseCreators.withSuccess("OK",
+						MediaType.APPLICATION_JSON));
+		String result = this.restTemplate
+				.getForObject(new URI("http://localhost/test/123"), String.class);
+		assertThat(result).isEqualTo("OK");
+		this.registry.get("http.client.requests").tags("uri", "/test/123").timer();
+		this.mockServer.verify();
+	}
+
 }