Author: markt
Date: Tue Jul 9 21:01:37 2013
New Revision: 1501548
URL: http://svn.apache.org/r1501548
Log:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55221
Truncate excessively long clean reasons before sending as control messages are
strictly limited in length.
Added:
tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java (with
props)
Modified:
tomcat/trunk/java/org/apache/tomcat/websocket/WsSession.java
Modified: tomcat/trunk/java/org/apache/tomcat/websocket/WsSession.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/tomcat/websocket/WsSession.java?rev=1501548&r1=1501547&r2=1501548&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/tomcat/websocket/WsSession.java (original)
+++ tomcat/trunk/java/org/apache/tomcat/websocket/WsSession.java Tue Jul 9
21:01:37 2013
@@ -48,6 +48,12 @@ import org.apache.tomcat.util.res.String
public class WsSession implements Session {
private static final Charset UTF8 = Charset.forName("UTF8");
+ // An ellipsis is a single character that looks like three periods in a row
+ // and is used to indicate a continuation.
+ private static final byte[] ELLIPSIS_BYTES = "\u2026".getBytes(UTF8);
+ // An ellipsis is three bytes in UTF-8
+ private static final int ELLIPSIS_BYTES_LEN = ELLIPSIS_BYTES.length;
+
private static final StringManager sm =
StringManager.getManager(Constants.PACKAGE_NAME);
private static AtomicLong ids = new AtomicLong(0);
@@ -450,9 +456,10 @@ public class WsSession implements Sessio
// 125 is maximum size for the payload of a control message
ByteBuffer msg = ByteBuffer.allocate(125);
msg.putShort((short) closeReason.getCloseCode().getCode());
+
String reason = closeReason.getReasonPhrase();
if (reason != null && reason.length() > 0) {
- msg.put(reason.getBytes(UTF8));
+ appendCloseReasonWithTruncation(msg, reason);
}
msg.flip();
try {
@@ -470,6 +477,35 @@ public class WsSession implements Sessio
}
+ /**
+ * Use protected so unit tests can access this method directly.
+ */
+ protected static void appendCloseReasonWithTruncation(ByteBuffer msg,
+ String reason) {
+ // Once the close code has been added there are a maximum of 123 bytes
+ // left for the reason phrase. If it is truncated then care needs to be
+ // taken to ensure the bytes are not truncated in the middle of a
+ // multi-byte UTF-8 character.
+ byte[] reasonBytes = reason.getBytes(UTF8);
+
+ if (reasonBytes.length <= 123) {
+ // No need to truncate
+ msg.put(reasonBytes);
+ } else {
+ // Need to truncate
+ int remaining = 123 - ELLIPSIS_BYTES_LEN;
+ int pos = 0;
+ byte[] bytesNext = reason.substring(pos, pos + 1).getBytes(UTF8);
+ while (remaining >= bytesNext.length) {
+ msg.put(bytesNext);
+ remaining -= bytesNext.length;
+ pos++;
+ bytesNext = reason.substring(pos, pos + 1).getBytes(UTF8);
+ }
+ msg.put(ELLIPSIS_BYTES);
+ }
+ }
+
@Override
public URI getRequestURI() {
checkState();
Added: tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java?rev=1501548&view=auto
==============================================================================
--- tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java (added)
+++ tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java Tue Jul 9
21:01:37 2013
@@ -0,0 +1,107 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.tomcat.websocket;
+
+import java.nio.ByteBuffer;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestWsSession {
+
+ @Test
+ public void testAppendCloseReasonWithTruncation01() {
+ doTestAppendCloseReasonWithTruncation(100);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation02() {
+ doTestAppendCloseReasonWithTruncation(119);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation03() {
+ doTestAppendCloseReasonWithTruncation(120);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation04() {
+ doTestAppendCloseReasonWithTruncation(121);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation05() {
+ doTestAppendCloseReasonWithTruncation(122);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation06() {
+ doTestAppendCloseReasonWithTruncation(123);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation07() {
+ doTestAppendCloseReasonWithTruncation(124);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation08() {
+ doTestAppendCloseReasonWithTruncation(125);
+ }
+
+
+ @Test
+ public void testAppendCloseReasonWithTruncation09() {
+ doTestAppendCloseReasonWithTruncation(150);
+ }
+
+
+ private void doTestAppendCloseReasonWithTruncation(int reasonLength) {
+ StringBuilder reason = new StringBuilder(reasonLength);
+ for (int i = 0; i < reasonLength; i++) {
+ reason.append('a');
+ }
+
+ ByteBuffer buf = ByteBuffer.allocate(256);
+
+ WsSession.appendCloseReasonWithTruncation(buf, reason.toString());
+
+ // Check the position and contents
+ if (reasonLength <= 123) {
+ Assert.assertEquals(reasonLength, buf.position());
+ for (int i = 0; i < reasonLength; i++) {
+ Assert.assertEquals('a', buf.get(i));
+ }
+ } else {
+ // Must have been truncated
+ Assert.assertEquals(123, buf.position());
+ for (int i = 0; i < 120; i++) {
+ Assert.assertEquals('a', buf.get(i));
+ }
+ Assert.assertEquals(0xE2, buf.get(120) & 0xFF);
+ Assert.assertEquals(0x80, buf.get(121) & 0xFF);
+ Assert.assertEquals(0xA6, buf.get(122) & 0xFF);
+ }
+ }
+}
Propchange: tomcat/trunk/test/org/apache/tomcat/websocket/TestWsSession.java
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