Use HTTPS and java.net.URI for scrobbling

HTTPS will help prevent eavesdropping on the auth token, and using URI
will ensure unusual characters (like spaces, accidental or otherwise)
are escaped correctly.

Fixes #588

Signed-off-by: Peter Marheine <peter@taricorp.net>

airsonic-main/src/main/java/org/airsonic/player/service/AudioScrobblerService.java

@@ -40,6 +40,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.io.IOException;
+import java.net.URI;
 import java.util.*;
 import java.util.concurrent.LinkedBlockingQueue;
 
@@ -174,8 +175,15 @@ public class AudioScrobblerService {
         String clientVersion = "0.1";
         long timestamp = System.currentTimeMillis() / 1000L;
         String authToken = calculateAuthenticationToken(registrationData.password, timestamp);
-        String[] lines = executeGetRequest("http://post.audioscrobbler.com/?hs=true&p=1.2.1&c=" + clientId + "&v=" +
-                                           clientVersion + "&u=" + registrationData.username + "&t=" + timestamp + "&a=" + authToken);
+        URI uri = new URI("https",
+                /* userInfo= */ null, "post.audioscrobbler.com", -1,
+                "/",
+                String.format("hs=true&p=1.2.1&c=%s&v=%s&u=%s&t=%s&a=%s",
+                        clientId, clientVersion, registrationData.username,
+                        timestamp, authToken),
+                /* fragment= */ null);
+
+        String[] lines = executeGetRequest(uri);
 
         if (lines[0].startsWith("BANNED")) {
             LOG.warn("Failed to scrobble song '" + registrationData.title + "' at Last.fm. Client version is banned.");
@@ -236,7 +244,7 @@ public class AudioScrobblerService {
         return DigestUtils.md5Hex(DigestUtils.md5Hex(password) + timestamp);
     }
 
-    private String[] executeGetRequest(String url) throws IOException {
+    private String[] executeGetRequest(URI url) throws IOException {
         HttpGet method = new HttpGet(url);
         method.setConfig(requestConfig);
         return executeRequest(method);