talk to relay.py/kill, first web api use from android

And it seems to work!

xwords4/android/app/src/main/java/org/eehouse/android/xw4/DictsDelegate.java

@@ -1238,7 +1238,7 @@ public class DictsDelegate extends ListDelegateBase
             // parse less data
             String name = null;
             String proc = String.format( "listDicts?lc=%s", m_lc );
-            HttpURLConnection conn = NetUtils.makeHttpConn( m_context, proc );
+            HttpURLConnection conn = NetUtils.makeHttpUpdateConn( m_context, proc );
             if ( null != conn ) {
                 JSONObject theOne = null;
                 String langName = null;
@@ -1320,7 +1320,7 @@ public class DictsDelegate extends ListDelegateBase
         public Boolean doInBackground( Void... unused )
         {
             boolean success = false;
-            HttpURLConnection conn = NetUtils.makeHttpConn( m_context, "listDicts" );
+            HttpURLConnection conn = NetUtils.makeHttpUpdateConn( m_context, "listDicts" );
             if ( null != conn ) {
                 String json = NetUtils.runConn( conn, new JSONObject() );
                 if ( !isCancelled() ) {

xwords4/android/app/src/main/java/org/eehouse/android/xw4/NetUtils.java

@@ -25,6 +25,8 @@ import android.text.TextUtils;
 
 import junit.framework.Assert;
 
+import org.json.JSONArray;
+import org.json.JSONException;
 import org.json.JSONObject;
 
 import java.io.BufferedInputStream;
@@ -88,7 +90,41 @@ public class NetUtils {
             m_obits = obits;
         }
 
-        public void run() {
+        public void run()
+        {
+            if ( XWPrefs.getPreferWebAPI( m_context ) ) {
+                runViaWeb();
+            } else {
+                runWithProxySocket();
+            }
+        }
+
+        private void runViaWeb()
+        {
+            try {
+                JSONArray params = new JSONArray();
+                for ( int ii = 0; ii < m_obits.length; ++ii ) {
+                    JSONObject one = new JSONObject();
+                    one.put( "relayID", m_obits[ii].m_relayID );
+                    one.put( "seed", m_obits[ii].m_seed );
+                    params.put( one );
+                }
+                HttpURLConnection conn = makeHttpRelayConn( m_context, "kill" );
+                Log.d( TAG, "kill params: %s", params.toString() );
+                String resStr = runConn( conn, params );
+                Log.d( TAG, "kill => %s", resStr );
+
+                JSONObject result = new JSONObject( resStr );
+                if ( 0 == result.optInt( "err", -1 ) ) {
+                    DBUtils.clearObits( m_context, m_obits );
+                }
+            } catch ( JSONException ex ) {
+                Assert.assertFalse( BuildConfig.DEBUG );
+            }
+        }
+
+        private void runWithProxySocket()
+        {
             Socket socket = makeProxySocket( m_context, 10000 );
             if ( null != socket ) {
                 int strLens = 0;
@@ -139,8 +175,7 @@ public class NetUtils {
     {
         DBUtils.Obit[] obits = DBUtils.listObits( context );
         if ( null != obits && 0 < obits.length ) {
-            InformThread thread = new InformThread( context, obits );
+            new InformThread( context, obits ).start();
-            thread.start();
         }
     }
 
@@ -214,14 +249,26 @@ public class NetUtils {
         return host;
     }
 
-    protected static HttpURLConnection makeHttpConn( Context context,
+    protected static HttpURLConnection makeHttpRelayConn( Context context,
                                                            String proc )
+    {
+        String url = XWPrefs.getDefaultRelayUrl( context );
+        return makeHttpConn( context, url, proc );
+    }
+
+    protected static HttpURLConnection makeHttpUpdateConn( Context context,
+                                                           String proc )
+    {
+        String url = XWPrefs.getDefaultUpdateUrl( context );
+        return makeHttpConn( context, url, proc );
+    }
+
+    private static HttpURLConnection makeHttpConn( Context context,
+                                                   String path, String proc )
     {
         HttpURLConnection result = null;
         try {
-            String url = String.format( "%s/%s",
+            String url = String.format( "%s/%s", path, proc );
-                                        XWPrefs.getDefaultUpdateUrl( context ),
-                                        proc );
             result = (HttpURLConnection)new URL(url).openConnection();
         } catch ( java.net.MalformedURLException mue ) {
             Assert.assertNull( result );
@@ -233,11 +280,21 @@ public class NetUtils {
         return result;
     }
 
+    protected static String runConn( HttpURLConnection conn, JSONArray param )
+    {
+        return runConn( conn, param.toString() );
+    }
+
     protected static String runConn( HttpURLConnection conn, JSONObject param )
+    {
+        return runConn( conn, param.toString() );
+    }
+
+    private static String runConn( HttpURLConnection conn, String param )
     {
         String result = null;
         Map<String, String> params = new HashMap<String, String>();
-        params.put( k_PARAMS, param.toString() );
+        params.put( k_PARAMS, param );
         String paramsString = getPostDataString( params );
 
         if ( null != paramsString ) {

xwords4/android/app/src/main/java/org/eehouse/android/xw4/UpdateCheckReceiver.java

@@ -258,7 +258,8 @@ public class UpdateCheckReceiver extends BroadcastReceiver {
 
         @Override protected String doInBackground( Void... unused )
         {
-            HttpURLConnection conn = NetUtils.makeHttpConn( m_context, "getUpdates" );
+            HttpURLConnection conn
+                = NetUtils.makeHttpUpdateConn( m_context, "getUpdates" );
             String json = null;
             if ( null != conn ) {
                 json = NetUtils.runConn( conn, m_params );

xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWPrefs.java

@@ -115,6 +115,16 @@ public class XWPrefs {
         return getPrefsString( context, R.string.key_update_url );
     }
 
+    public static String getDefaultRelayUrl( Context context )
+    {
+        return getPrefsString( context, R.string.key_relay_url );
+    }
+
+    public static boolean getPreferWebAPI( Context context )
+    {
+        return getPrefsBoolean( context, R.string.key_relay_via_http, false );
+    }
+
     public static int getDefaultProxyPort( Context context )
     {
         String val = getPrefsString( context, R.string.key_proxy_port );