Hack Hystrix Dashbaord to have a select which loads eureka apps so yo…

…u dont need to type it

hystrix-dashboard/build.gradle

@@ -6,9 +6,7 @@ dependencies {
     compile 'org.apache.httpcomponents:httpclient:4.2.1'
     compile 'log4j:log4j:1.2.17'
     compile 'org.slf4j:slf4j-log4j12:1.7.0'
-    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
-    compile 'com.squareup.retrofit2:converter-simplexml:2.0.2'
-    compile 'com.squareup.retrofit2:converter-jackson:2.0.2'
+    compile 'commons-io:commons-io:2.5'
     testCompile 'junit:junit:4.12'
 }
 

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/stream/EurekaInfoServlet.java

@@ -0,0 +1,37 @@
+package com.netflix.hystrix.dashboard.stream;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.io.IOUtils;
+
+/**
+ * Servlet that calls eureka REST api in order to get instances information. <BR>
+ * You need provide a url parameter. i.e: eureka?url=http://127.0.0.1:8080/eureka/v2/apps
+ * 
+ * @author diegopacheco
+ *
+ */
+public class EurekaInfoServlet extends HttpServlet {
+
+	 private static final long serialVersionUID = 1L;
+
+	 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+		 String uri = request.getParameter("url");
+		 if (uri==null || "".equals(uri)) response.getOutputStream().write("Error. You need supply a valid eureka URL ".getBytes()); 
+
+		 try{
+			 response.setContentType("application/xml");
+			 response.setHeader("Content-Encoding", "gzip");
+			 IOUtils.copy( UrlUtils.readXmlInputStream(uri) ,response.getOutputStream());
+		 }catch(Exception e){
+			 response.getOutputStream().write(("Error. You need supply a valid eureka URL. Ex: " + e + "").getBytes()); 
+		 }
+
+	 }
+}

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/stream/UrlUtils.java

@@ -0,0 +1,32 @@
+package com.netflix.hystrix.dashboard.stream;
+
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+/**
+ * Utility class to work with InputStreams
+ * 
+ * @author diegopacheco
+ *
+ */
+public class UrlUtils {
+
+	public static InputStream readXmlInputStream(String uri){
+
+		if (uri==null || "".equals(uri)) throw new IllegalArgumentException("Invalid uri. URI cannot be null or blank. ");	
+
+		try{
+			 URL url = new URL(uri);
+			 HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+			 connection.setRequestMethod("GET");
+			 connection.setRequestProperty("Accept", "application/xml");
+
+			 return connection.getInputStream();
+
+		}catch(Exception e){
+			throw new RuntimeException(e);
+		}
+	}
+
+}

hystrix-dashboard/src/main/test/com/netflix/hystrix/dashboard/stream/UrlUtilsTest.java

@@ -0,0 +1,23 @@
+package com.netflix.hystrix.dashboard.stream;
+
+import org.junit.Test;
+
+/**
+ * UrlUtilsTest unit tests
+ * 
+ * @author diegopacheco
+ *
+ */
+public class UrlUtilsTest {
+
+	@Test(expected=IllegalArgumentException.class)
+	public void testReadXmlInputStreamWithNull() {
+		UrlUtils.readXmlInputStream(null);
+	}
+
+	@Test(expected=IllegalArgumentException.class)
+	public void testReadXmlInputStreamWithBlank() {
+		UrlUtils.readXmlInputStream("");
+	}
+
+}

hystrix-dashboard/src/main/webapp/WEB-INF/web.xml

@@ -26,5 +26,16 @@
 		<servlet-name>ProxyStreamServlet</servlet-name>
 		<url-pattern>/proxy.stream</url-pattern>
 	</servlet-mapping>
+
+	<servlet>
+		<description />
+		<display-name>EurekaInfoServlet</display-name>
+		<servlet-name>EurekaInfoServlet</servlet-name>
+		<servlet-class>com.netflix.hystrix.dashboard.stream.EurekaInfoServlet</servlet-class>
+	</servlet>
+	<servlet-mapping>
+		<servlet-name>EurekaInfoServlet</servlet-name>
+		<url-pattern>/eureka</url-pattern>
+	</servlet-mapping>
 
 </web-app>

hystrix-dashboard/src/main/webapp/index.html

@@ -46,14 +46,12 @@
 				}
 			});
 		});
-
-		console.log(2);
 
 		$(document).ready(function(){
 
 				$('#eurekaURL').on('input',function(e){
-
-					$.get($('#eurekaURL').val(), function( data ) {
+					url = window.location.pathname + "eureka?url=" + $('#eurekaURL').val()
+					$.get(url,function( data ) {
 
 				   		$(data.children).find("application").each(function(index,item){
 					   	  appName = $(item).find("name")[0].innerHTML