Merge pull request #93 from socketio/fix/compatible-v3

Update to make compatible with engine.io v3

.travis.yml

@@ -1,5 +1,7 @@
 language: java
+sudo: false
 install: mvn install -DskipTests=true -Dgpg.skip=true
 jdk:
   - openjdk7
   - oraclejdk8
+dist: trusty

src/main/java/io/socket/engineio/client/Socket.java

@@ -121,6 +121,7 @@ public class Socket extends Emitter {
     private String path;
     private String timestampParam;
     private List<String> transports;
+    private Map<String, Transport.Options> transportOptions;
     private List<String> upgrades;
     private Map<String, String> query;
     /*package*/ LinkedList<Packet> writeBuffer = new LinkedList<Packet>();
@@ -202,6 +203,8 @@ public class Socket extends Emitter {
         this.timestampRequests = opts.timestampRequests;
         this.transports = new ArrayList<String>(Arrays.asList(opts.transports != null ?
                 opts.transports : new String[]{Polling.NAME, WebSocket.NAME}));
+        this.transportOptions = opts.transportOptions != null ?
+                opts.transportOptions : new HashMap<String, Transport.Options>();
         this.policyPort = opts.policyPort != 0 ? opts.policyPort : 843;
         this.rememberUpgrade = opts.rememberUpgrade;
         this.callFactory = opts.callFactory != null ? opts.callFactory : defaultCallFactory;
@@ -272,18 +275,22 @@ public class Socket extends Emitter {
             query.put("sid", this.id);
         }
 
+        // per-transport options
+        Transport.Options options = this.transportOptions.get(name);
+
         Transport.Options opts = new Transport.Options();
-        opts.hostname = this.hostname;
-        opts.port = this.port;
-        opts.secure = this.secure;
-        opts.path = this.path;
         opts.query = query;
-        opts.timestampRequests = this.timestampRequests;
-        opts.timestampParam = this.timestampParam;
-        opts.policyPort = this.policyPort;
         opts.socket = this;
-        opts.callFactory = this.callFactory;
+
-        opts.webSocketFactory = this.webSocketFactory;
+        opts.hostname = options != null ? options.hostname : this.hostname;
+        opts.port = options != null ? options.port : this.port;
+        opts.secure = options != null ? options.secure : this.secure;
+        opts.path = options != null ? options.path : this.path;
+        opts.timestampRequests = options != null ? options.timestampRequests : this.timestampRequests;
+        opts.timestampParam = options != null ? options.timestampParam : this.timestampParam;
+        opts.policyPort = options != null ? options.policyPort : this.policyPort;
+        opts.callFactory = options != null ? options.callFactory : this.callFactory;
+        opts.webSocketFactory = options != null ? options.webSocketFactory : this.webSocketFactory;
 
         Transport transport;
         if (WebSocket.NAME.equals(name)) {
@@ -866,7 +873,7 @@ public class Socket extends Emitter {
         public boolean rememberUpgrade;
         public String host;
         public String query;
-
+        public Map<String, Transport.Options> transportOptions;
 
         private static Options fromURI(URI uri, Options opts) {
             if (opts == null) {

src/main/java/io/socket/engineio/client/transports/Polling.java

@@ -183,10 +183,16 @@ abstract public class Polling extends Transport {
             }
         };
 
-        Parser.encodePayload(packets, new Parser.EncodeCallback<byte[]>() {
+        Parser.encodePayload(packets, new Parser.EncodeCallback() {
             @Override
-            public void call(byte[] data) {
+            public void call(Object data) {
-                self.doWrite(data, callbackfn);
+                if (data instanceof byte[]) {
+                    self.doWrite((byte[])data, callbackfn);
+                } else if (data instanceof String) {
+                    self.doWrite((String)data, callbackfn);
+                } else {
+                    logger.warning("Unexpected data: " + data);
+                }
             }
         });
     }
@@ -220,5 +226,7 @@ abstract public class Polling extends Transport {
 
     abstract protected void doWrite(byte[] data, Runnable fn);
 
+    abstract protected void doWrite(String data, Runnable fn);
+
     abstract protected void doPoll();
 }

src/main/java/io/socket/engineio/client/transports/PollingXHR.java

@@ -8,6 +8,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import io.socket.emitter.Emitter;
@@ -26,6 +27,8 @@ public class PollingXHR extends Polling {
 
     private static final Logger logger = Logger.getLogger(PollingXHR.class.getName());
 
+    private static boolean LOGGABLE_FINE = logger.isLoggable(Level.FINE);
+
     public PollingXHR(Transport.Options opts) {
         super(opts);
     }
@@ -66,6 +69,15 @@ public class PollingXHR extends Polling {
 
     @Override
     protected void doWrite(byte[] data, final Runnable fn) {
+        this.doWrite((Object) data, fn);
+    }
+
+    @Override
+    protected void doWrite(String data, final Runnable fn) {
+        this.doWrite((Object) data, fn);
+    }
+
+    private void doWrite(Object data, final Runnable fn) {
         Request.Options opts = new Request.Options();
         opts.method = "POST";
         opts.data = data;
@@ -140,13 +152,17 @@ public class PollingXHR extends Polling {
         public static final String EVENT_ERROR = "error";
         public static final String EVENT_REQUEST_HEADERS = "requestHeaders";
         public static final String EVENT_RESPONSE_HEADERS = "responseHeaders";
+
         private static final String BINARY_CONTENT_TYPE = "application/octet-stream";
+        private static final String TEXT_CONTENT_TYPE = "text/plain;charset=UTF-8";
+
+        private static final MediaType BINARY_MEDIA_TYPE = MediaType.parse(BINARY_CONTENT_TYPE);
+        private static final MediaType TEXT_MEDIA_TYPE = MediaType.parse(TEXT_CONTENT_TYPE);
 
         private String method;
         private String uri;
 
-        // data is always a binary
+        private Object data;
-        private byte[] data;
 
         private Call.Factory callFactory;
         private Response response;
@@ -161,28 +177,42 @@ public class PollingXHR extends Polling {
 
         public void create() {
             final Request self = this;
-            logger.fine(String.format("xhr open %s: %s", this.method, this.uri));
+            if (LOGGABLE_FINE) logger.fine(String.format("xhr open %s: %s", this.method, this.uri));
             Map<String, List<String>> headers = new TreeMap<String, List<String>>(String.CASE_INSENSITIVE_ORDER);
 
             if ("POST".equals(this.method)) {
+                if (this.data instanceof byte[]) {
                     headers.put("Content-type", new LinkedList<String>(Collections.singletonList(BINARY_CONTENT_TYPE)));
+                } else {
+                    headers.put("Content-type", new LinkedList<String>(Collections.singletonList(TEXT_CONTENT_TYPE)));
+                }
             }
 
             headers.put("Accept", new LinkedList<String>(Collections.singletonList("*/*")));
 
-            self.onRequestHeaders(headers);
+            this.onRequestHeaders(headers);
+
+            if (LOGGABLE_FINE) {
+                logger.fine(String.format("sending xhr with url %s | data %s", this.uri,
+                        this.data instanceof byte[] ? Arrays.toString((byte[]) this.data) : this.data));
+            }
 
-            logger.fine(String.format("sending xhr with url %s | data %s", this.uri, Arrays.toString(this.data)));
             okhttp3.Request.Builder requestBuilder = new okhttp3.Request.Builder();
             for (Map.Entry<String, List<String>> header : headers.entrySet()) {
                 for (String v : header.getValue()){
                     requestBuilder.addHeader(header.getKey(), v);
                 }
             }
+            RequestBody body = null;
+            if (this.data instanceof byte[]) {
+                body = RequestBody.create(BINARY_MEDIA_TYPE, (byte[])this.data);
+            } else if (this.data instanceof String) {
+                body = RequestBody.create(TEXT_MEDIA_TYPE, (String)this.data);
+            }
+
             okhttp3.Request request = requestBuilder
                     .url(HttpUrl.parse(self.uri))
-                    .method(self.method, (self.data != null) ?
+                    .method(self.method, body)
-                            RequestBody.create(MediaType.parse(BINARY_CONTENT_TYPE), self.data) : null)
                     .build();
 
             requestCall = callFactory.newCall(request);
@@ -255,7 +285,7 @@ public class PollingXHR extends Polling {
 
             public String uri;
             public String method;
-            public byte[] data;
+            public Object data;
             public Call.Factory callFactory;
         }
     }

src/main/java/io/socket/engineio/parser/Parser.java

@@ -35,6 +35,11 @@ public class Parser {
 
     private static Packet<String> err = new Packet<String>(Packet.ERROR, "parser error");
 
+    private static UTF8.Options utf8Options = new UTF8.Options();
+    static  {
+        utf8Options.strict = false;
+    }
+
 
     private Parser() {}
 
@@ -55,7 +60,7 @@ public class Parser {
         String encoded = String.valueOf(packets.get(packet.type));
 
         if (null != packet.data) {
-            encoded += utf8encode ? UTF8.encode(String.valueOf(packet.data)) : String.valueOf(packet.data);
+            encoded += utf8encode ? UTF8.encode(String.valueOf(packet.data), utf8Options) : String.valueOf(packet.data);
         }
 
         @SuppressWarnings("unchecked")
@@ -89,7 +94,7 @@ public class Parser {
 
         if (utf8decode) {
             try {
-                data = UTF8.decode(data);
+                data = UTF8.decode(data, utf8Options);
             } catch (UTF8Exception e) {
                 return err;
             }
@@ -113,7 +118,40 @@ public class Parser {
         return new Packet<byte[]>(packetslist.get(type), intArray);
     }
 
-    public static void encodePayload(Packet[] packets, EncodeCallback<byte[]> callback) throws UTF8Exception {
+    public static void encodePayload(Packet[] packets, EncodeCallback callback) throws UTF8Exception {
+        for (Packet packet : packets) {
+            if (packet.data instanceof byte[]) {
+                @SuppressWarnings("unchecked")
+                EncodeCallback<byte[]> _callback = (EncodeCallback<byte[]>) callback;
+                encodePayloadAsBinary(packets, _callback);
+                return;
+            }
+        }
+
+        if (packets.length == 0) {
+            callback.call("0:");
+            return;
+        }
+
+        final StringBuilder result = new StringBuilder();
+
+        for (Packet packet : packets) {
+            encodePacket(packet, false, new EncodeCallback() {
+                @Override
+                public void call(Object message) {
+                    result.append(setLengthHeader((String)message));
+                }
+            });
+        }
+
+        callback.call(result.toString());
+    }
+
+    private static String setLengthHeader(String message) {
+        return message.length() + ":" + message;
+    }
+
+    private static void encodePayloadAsBinary(Packet[] packets, EncodeCallback<byte[]> callback) throws UTF8Exception {
         if (packets.length == 0) {
             callback.call(new byte[0]);
             return;
@@ -122,7 +160,19 @@ public class Parser {
         final ArrayList<byte[]> results = new ArrayList<byte[]>(packets.length);
 
         for (Packet packet : packets) {
-            encodePacket(packet, true, new EncodeCallback() {
+            encodeOneBinaryPacket(packet, new EncodeCallback<byte[]>() {
+                @Override
+                public void call(byte[] data) {
+                    results.add(data);
+                }
+            });
+        }
+
+        callback.call(Buffer.concat(results.toArray(new byte[results.size()][])));
+    }
+
+    private static void encodeOneBinaryPacket(Packet p, final EncodeCallback<byte[]> doneCallback) throws UTF8Exception {
+        encodePacket(p, true, new EncodeCallback() {
             @Override
             public void call(Object packet) {
                 if (packet instanceof String) {
@@ -134,7 +184,7 @@ public class Parser {
                         sizeBuffer[i + 1] = (byte)Character.getNumericValue(encodingLength.charAt(i));
                     }
                     sizeBuffer[sizeBuffer.length - 1] = (byte)255;
-                        results.add(Buffer.concat(new byte[][] {sizeBuffer, stringToByteArray((String)packet)}));
+                    doneCallback.call(Buffer.concat(new byte[][] {sizeBuffer, stringToByteArray((String)packet)}));
                     return;
                 }
 
@@ -145,14 +195,11 @@ public class Parser {
                     sizeBuffer[i + 1] = (byte)Character.getNumericValue(encodingLength.charAt(i));
                 }
                 sizeBuffer[sizeBuffer.length - 1] = (byte)255;
-                    results.add(Buffer.concat(new byte[][] {sizeBuffer, (byte[])packet}));
+                doneCallback.call(Buffer.concat(new byte[][] {sizeBuffer, (byte[])packet}));
             }
         });
     }
 
-        callback.call(Buffer.concat(results.toArray(new byte[results.size()][])));
-    }
-
     public static void decodePayload(String data, DecodePayloadCallback<String> callback) {
         if (data == null || data.length() == 0) {
             callback.call(err, 0, 1);
@@ -165,7 +212,9 @@ public class Parser {
 
             if (':' != chr) {
                 length.append(chr);
-            } else {
+                continue;
+            }
+
             int n;
             try {
                 n = Integer.parseInt(length.toString());
@@ -183,20 +232,21 @@ public class Parser {
             }
 
             if (msg.length() != 0) {
-                    Packet<String> packet = decodePacket(msg, true);
+                Packet<String> packet = decodePacket(msg, false);
                 if (err.type.equals(packet.type) && err.data.equals(packet.data)) {
                     callback.call(err, 0, 1);
                     return;
                 }
 
                 boolean ret = callback.call(packet, i + n, l);
-                    if (!ret) return;
+                if (!ret) {
+                    return;
+                }
             }
 
             i += n;
             length = new StringBuilder();
         }
-        }
 
         if (length.length() > 0) {
             callback.call(err, 0, 1);
@@ -210,23 +260,17 @@ public class Parser {
         while (bufferTail.capacity() > 0) {
             StringBuilder strLen = new StringBuilder();
             boolean isString = (bufferTail.get(0) & 0xFF) == 0;
-            boolean numberTooLong = false;
             for (int i = 1; ; i++) {
                 int b = bufferTail.get(i) & 0xFF;
                 if (b == 255) break;
                 // supports only integer
                 if (strLen.length() > MAX_INT_CHAR_LENGTH) {
-                    numberTooLong = true;
+                    callback.call(err, 0, 1);
-                    break;
+                    return;
                 }
                 strLen.append(b);
             }
-            if (numberTooLong) {
+
-                @SuppressWarnings("unchecked")
-                DecodePayloadCallback<String> tempCallback = callback;
-                tempCallback.call(err, 0, 1);
-                return;
-            }
             bufferTail.position(strLen.length() + 1);
             bufferTail = bufferTail.slice();
 

src/main/java/io/socket/utf8/UTF8.java

@@ -18,6 +18,12 @@ public final class UTF8 {
     private UTF8 () {}
 
     public static String encode(String string) throws UTF8Exception {
+        return encode(string, new Options());
+    }
+
+    public static String encode(String string, Options opts) throws UTF8Exception {
+        boolean strict = opts.strict;
+
         int[] codePoints = ucs2decode(string);
         int length = codePoints.length;
         int index = -1;
@@ -25,18 +31,24 @@ public final class UTF8 {
         StringBuilder byteString = new StringBuilder();
         while (++index < length) {
             codePoint = codePoints[index];
-            byteString.append(encodeCodePoint(codePoint));
+            byteString.append(encodeCodePoint(codePoint, strict));
         }
         return byteString.toString();
     }
 
     public static String decode(String byteString) throws UTF8Exception {
+        return decode(byteString, new Options());
+    }
+
+    public static String decode(String byteString, Options opts) throws UTF8Exception {
+        boolean strict = opts.strict;
+
         byteArray = ucs2decode(byteString);
         byteCount = byteArray.length;
         byteIndex = 0;
         List<Integer> codePoints = new ArrayList<Integer>();
         int tmp;
-        while ((tmp = decodeSymbol()) != -1) {
+        while ((tmp = decodeSymbol(strict)) != -1) {
             codePoints.add(tmp);
         }
         return ucs2encode(listToArray(codePoints));
@@ -54,7 +66,7 @@ public final class UTF8 {
         return output;
     }
 
-    private static String encodeCodePoint(int codePoint) throws UTF8Exception {
+    private static String encodeCodePoint(int codePoint, boolean strict) throws UTF8Exception {
         StringBuilder symbol = new StringBuilder();
         if ((codePoint & 0xFFFFFF80) == 0) {
             return symbol.append(Character.toChars(codePoint)).toString();
@@ -62,7 +74,9 @@ public final class UTF8 {
         if ((codePoint & 0xFFFFF800) == 0) {
             symbol.append(Character.toChars(((codePoint >> 6) & 0x1F) | 0xC0));
         } else if ((codePoint & 0xFFFF0000) == 0) {
-            checkScalarValue(codePoint);
+            if (!checkScalarValue(codePoint, strict)) {
+                codePoint = 0xFFFD;
+            }
             symbol.append(Character.toChars(((codePoint >> 12) & 0x0F) | 0xE0));
             symbol.append(createByte(codePoint, 6));
         } else if ((codePoint & 0xFFE00000) == 0) {
@@ -78,7 +92,7 @@ public final class UTF8 {
         return Character.toChars(((codePoint >> shift) & 0x3F) | 0x80);
     }
 
-    private static int decodeSymbol() throws UTF8Exception {
+    private static int decodeSymbol(boolean strict) throws UTF8Exception {
         int byte1;
         int byte2;
         int byte3;
@@ -115,8 +129,7 @@ public final class UTF8 {
             byte3 = readContinuationByte();
             codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
             if (codePoint >= 0x0800) {
-                checkScalarValue(codePoint);
+                return checkScalarValue(codePoint, strict) ? codePoint : 0xFFFD;
-                return codePoint;
             } else {
                 throw new UTF8Exception(INVALID_CONTINUATION_BYTE);
             }
@@ -158,13 +171,17 @@ public final class UTF8 {
         return output.toString();
     }
 
-    private static void checkScalarValue(int codePoint) throws UTF8Exception {
+    private static boolean checkScalarValue(int codePoint, boolean strict) throws UTF8Exception {
         if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
+            if (strict) {
                 throw new UTF8Exception(
                         "Lone surrogate U+" + Integer.toHexString(codePoint).toUpperCase() +
                                 " is not a scalar value"
                 );
             }
+            return false;
+        }
+        return true;
     }
 
     private static int[] listToArray(List<Integer> list) {
@@ -175,4 +192,8 @@ public final class UTF8 {
         }
         return array;
     }
+
+    public static class Options {
+        public boolean strict = true;
+    }
 }

src/test/java/io/socket/engineio/parser/ParserTest.java

@@ -156,6 +156,19 @@ public class ParserTest {
         });
     }
 
+    @Test
+    public void encodingStringMessageWithLoneSurrogatesReplacedByUFFFD() throws UTF8Exception  {
+        String data = "\uDC00\uD834\uDF06\uDC00 \uD800\uD835\uDF07\uD800";
+        encodePacket(new Packet<String>(Packet.MESSAGE, data), true, new EncodeCallback<String>() {
+            @Override
+            public void call(String encoded) {
+                Packet<String> p = decodePacket(encoded, true);
+                assertThat(p.type, is(Packet.MESSAGE));
+                assertThat(p.data, is("\uFFFD\uD834\uDF06\uFFFD \uFFFD\uD835\uDF07\uFFFD"));
+            }
+        });
+    }
+
     @Test
     public void decodeEmptyPayload() {
         Packet<String> p = decodePacket((String)null);
@@ -186,20 +199,20 @@ public class ParserTest {
 
     @Test
     public void encodePayloads() throws UTF8Exception  {
-        encodePayload(new Packet[]{new Packet(Packet.PING), new Packet(Packet.PONG)}, new EncodeCallback<byte[]>() {
+        encodePayload(new Packet[]{new Packet(Packet.PING), new Packet(Packet.PONG)}, new EncodeCallback<String>() {
             @Override
-            public void call(byte[] data) {
+            public void call(String data) {
-                assertThat(data, isA(byte[].class));
+                assertThat(data, isA(String.class));
             }
         });
     }
 
     @Test
     public void encodeAndDecodePayloads() throws UTF8Exception  {
-        encodePayload(new Packet[] {new Packet<String>(Packet.MESSAGE, "a")}, new EncodeCallback<byte[]>() {
+        encodePayload(new Packet[] {new Packet<String>(Packet.MESSAGE, "a")}, new EncodeCallback<String>() {
             @Override
-            public void call(byte[] data) {
+            public void call(String data) {
-                decodePayload(data, new DecodePayloadCallback() {
+                decodePayload(data, new DecodePayloadCallback<String>() {
                     @Override
                     public boolean call(Packet packet, int index, int total) {
                         boolean isLast = index + 1 == total;
@@ -209,10 +222,10 @@ public class ParserTest {
                 });
             }
         });
-        encodePayload(new Packet[]{new Packet<String>(Packet.MESSAGE, "a"), new Packet(Packet.PING)}, new EncodeCallback<byte[]>() {
+        encodePayload(new Packet[]{new Packet<String>(Packet.MESSAGE, "a"), new Packet(Packet.PING)}, new EncodeCallback<String>() {
             @Override
-            public void call(byte[] data) {
+            public void call(String data) {
-                decodePayload(data, new DecodePayloadCallback() {
+                decodePayload(data, new DecodePayloadCallback<String>() {
                     @Override
                     public boolean call(Packet packet, int index, int total) {
                         boolean isLast = index + 1 == total;
@@ -230,10 +243,10 @@ public class ParserTest {
 
     @Test
     public void encodeAndDecodeEmptyPayloads() throws UTF8Exception  {
-        encodePayload(new Packet[] {}, new EncodeCallback<byte[]>() {
+        encodePayload(new Packet[] {}, new EncodeCallback<String>() {
             @Override
-            public void call(byte[] data) {
+            public void call(String data) {
-                decodePayload(data, new DecodePayloadCallback() {
+                decodePayload(data, new DecodePayloadCallback<String>() {
                     @Override
                     public boolean call(Packet packet, int index, int total) {
                         assertThat(packet.type, is(Packet.OPEN));
@@ -246,6 +259,19 @@ public class ParserTest {
         });
     }
 
+    @Test
+    public void notUTF8EncodeWhenDealingWithStringsOnly() throws UTF8Exception  {
+        encodePayload(new Packet[] {
+                new Packet(Packet.MESSAGE, "€€€"),
+                new Packet(Packet.MESSAGE, "α")
+        }, new EncodeCallback<String>() {
+            @Override
+            public void call(String data) {
+                assertThat(data, is("4:4€€€2:4α"));
+            }
+        });
+    }
+
     @Test
     public void decodePayloadBadFormat() {
         decodePayload("1!", new DecodePayloadCallback<String>() {
@@ -328,20 +354,6 @@ public class ParserTest {
         });
     }
 
-    @Test
-    public void decodePayloadInvalidUTF8() {
-        decodePayload("2:4\uffff", new DecodePayloadCallback<String>() {
-            @Override
-            public boolean call(Packet<String> packet, int index, int total) {
-                boolean isLast = index + 1 == total;
-                assertThat(packet.type, is(Packet.ERROR));
-                assertThat(packet.data, is(ERROR_DATA));
-                assertThat(isLast, is(true));
-                return true;
-            }
-        });
-    }
-
     @Test
     public void encodeBinaryMessage() throws UTF8Exception  {
         final byte[] data = new byte[5];

src/test/resources/package-lock.json

@@ -1,32 +1,6 @@
 {
   "requires": true,
   "lockfileVersion": 1,
-  "dependencies": {
-    "arraybuffer.slice": {
-      "version": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
-    },
-    "blob": {
-      "version": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE="
-    },
-    "cookie": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
-    },
-    "engine.io": {
-      "version": "1.8.4",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-1.8.4.tgz",
-      "integrity": "sha1-d7zhK4Dl1gQpM3/sOw2vaR68kAM=",
-      "requires": {
-        "accepts": "1.3.3",
-        "base64id": "1.0.0",
-        "cookie": "0.3.1",
-        "debug": "2.3.3",
-        "engine.io-parser": "1.3.2",
-        "ws": "1.1.4"
-      },
   "dependencies": {
     "accepts": {
       "version": "1.3.3",
@@ -42,6 +16,10 @@
       "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
       "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
     },
+    "arraybuffer.slice": {
+      "version": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
+      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
+    },
     "base64-arraybuffer": {
       "version": "0.1.5",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
@@ -52,33 +30,62 @@
       "resolved": "https://registry.npmjs.org/base64id/-/base64id-1.0.0.tgz",
       "integrity": "sha1-R2iMuZu2gE8OBtPnY7HDLlfY5rY="
     },
+    "blob": {
+      "version": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
+      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE="
+    },
+    "cookie": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
+      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+    },
     "debug": {
-          "version": "2.3.3",
+      "version": "2.6.8",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-          "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
+      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
       "requires": {
-            "ms": "0.7.2"
+        "ms": "2.0.0"
+      }
+    },
+    "engine.io": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.1.0.tgz",
+      "integrity": "sha1-XKQ4486f28kVxKIcjdnhJmcG5X4=",
+      "requires": {
+        "accepts": "1.3.3",
+        "base64id": "1.0.0",
+        "cookie": "0.3.1",
+        "debug": "2.6.8",
+        "engine.io-parser": "2.1.1",
+        "uws": "0.14.5",
+        "ws": "2.3.1"
       }
     },
     "engine.io-parser": {
-          "version": "1.3.2",
+      "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-1.3.2.tgz",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.1.tgz",
-          "integrity": "sha1-k3sHnwAH0Ik+xW1GyyILjLQ1Igo=",
+      "integrity": "sha1-4Ps/DgRi9/WLt3waUun1p+JuRmg=",
       "requires": {
         "after": "0.8.2",
         "arraybuffer.slice": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
         "base64-arraybuffer": "0.1.5",
         "blob": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-            "has-binary": "0.1.7",
+        "has-binary2": "1.0.2"
-            "wtf-8": "1.0.0"
       }
     },
-        "has-binary": {
+    "has-binary2": {
-          "version": "0.1.7",
+      "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/has-binary/-/has-binary-0.1.7.tgz",
+      "resolved": "https://registry.npmjs.org/has-binary2/-/has-binary2-1.0.2.tgz",
-          "integrity": "sha1-aOYesWIQyVRaClzOBqhzkS/h5ow=",
+      "integrity": "sha1-6D26SfC5vk0CbSc2U1DZ8D9Uvpg=",
       "requires": {
-            "isarray": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz"
+        "isarray": "2.0.1"
+      },
+      "dependencies": {
+        "isarray": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
+          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4="
+        }
       }
     },
     "mime-db": {
@@ -95,42 +102,41 @@
       }
     },
     "ms": {
-          "version": "0.7.2",
+      "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.2.tgz",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-riXPJRKziFodldfwN4aNhDESR2U="
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
     },
     "negotiator": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk="
     },
+    "safe-buffer": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.0.1.tgz",
+      "integrity": "sha1-0mPKVGls2KMGtcplUekt5XkY++c="
+    },
+    "uws": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/uws/-/uws-0.14.5.tgz",
+      "integrity": "sha1-Z6rzPEaypYel9mZtAPdpEyjxSdw=",
+      "optional": true
+    },
     "ws": {
-          "version": "1.1.4",
+      "version": "2.3.1",
-          "resolved": "https://registry.npmjs.org/ws/-/ws-1.1.4.tgz",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-2.3.1.tgz",
-          "integrity": "sha1-V/QNA2gy5fUFVmKjl8Tedu1mv2E=",
+      "integrity": "sha1-a5Sz5EfLajY/eF6vlK9jWejoHIA=",
       "requires": {
-            "options": "https://registry.npmjs.org/options/-/options-0.0.6.tgz",
+        "safe-buffer": "5.0.1",
-            "ultron": "https://registry.npmjs.org/ultron/-/ultron-1.0.2.tgz"
+        "ultron": "1.1.0"
-          }
-        }
-      }
-    },
-    "isarray": {
-      "version": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
-    },
-    "options": {
-      "version": "https://registry.npmjs.org/options/-/options-0.0.6.tgz",
-      "integrity": "sha1-7CLTEoBrtT5zF3Pnza788cZDEo8="
       },
+      "dependencies": {
         "ultron": {
-      "version": "https://registry.npmjs.org/ultron/-/ultron-1.0.2.tgz",
+          "version": "1.1.0",
-      "integrity": "sha1-rOEWq1V80Zc4ak6I9GhTeMiy5Po="
+          "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.0.tgz",
-    },
+          "integrity": "sha1-sHoualQagV/Go0zNRTO67DB8qGQ="
-    "wtf-8": {
+        }
-      "version": "1.0.0",
+      }
-      "resolved": "https://registry.npmjs.org/wtf-8/-/wtf-8-1.0.0.tgz",
-      "integrity": "sha1-OS2LotDxw00e4tYw8V0O+2jhBIo="
     }
   }
 }

src/test/resources/package.json

@@ -1,6 +1,6 @@
 {
   "private": true,
   "dependencies": {
-    "engine.io": "1.8.4"
+    "engine.io": "3.1.0"
   }
 }

src/test/resources/server.js

@@ -11,7 +11,10 @@ if (process.env.SSL) {
   http = require('http').createServer();
 }
 
-var server = engine.attach(http, {pingInterval: 500});
+var server = engine.attach(http, {
+  pingInterval: 500,
+  wsEngine: 'ws'
+});
 
 var port = process.env.PORT || 3000
 http.listen(port, function() {