/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed 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.springframework.messaging.simp.stomp;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.List;
import org.junit.Test;
import org.springframework.messaging.Message;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
/**
* Unit tests for {@link BufferingStompDecoder}.
*
* @author Rossen Stoyanchev
* @since 4.0.3
*/
public class BufferingStompDecoderTests {
private final StompDecoder STOMP_DECODER = new StompDecoder();
@Test
public void basic() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk = "SEND\na:alpha\n\nMessage body\0";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk));
assertEquals(1, messages.size());
assertEquals("Message body", new String(messages.get(0).getPayload()));
assertEquals(0, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
}
@Test
public void oneMessageInTwoChunks() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk1 = "SEND\na:alpha\n\nMessage";
String chunk2 = " body\0";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk1));
assertEquals(Collections.<Message<byte[]>>emptyList(), messages);
messages = stompDecoder.decode(toByteBuffer(chunk2));
assertEquals(1, messages.size());
assertEquals("Message body", new String(messages.get(0).getPayload()));
assertEquals(0, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
}
@Test
public void twoMessagesInOneChunk() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk = "SEND\na:alpha\n\nPayload1\0" + "SEND\na:alpha\n\nPayload2\0";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk));
assertEquals(2, messages.size());
assertEquals("Payload1", new String(messages.get(0).getPayload()));
assertEquals("Payload2", new String(messages.get(1).getPayload()));
assertEquals(0, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
}
@Test
public void oneFullAndOneSplitMessageContentLength() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
int contentLength = "Payload2a-Payload2b".getBytes().length;
String chunk1 = "SEND\na:alpha\n\nPayload1\0SEND\ncontent-length:" + contentLength + "\n";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk1));
assertEquals(1, messages.size());
assertEquals("Payload1", new String(messages.get(0).getPayload()));
assertEquals(23, stompDecoder.getBufferSize());
assertEquals(contentLength, (int) stompDecoder.getExpectedContentLength());
String chunk2 = "\nPayload2a";
messages = stompDecoder.decode(toByteBuffer(chunk2));
assertEquals(0, messages.size());
assertEquals(33, stompDecoder.getBufferSize());
assertEquals(contentLength, (int) stompDecoder.getExpectedContentLength());
String chunk3 = "-Payload2b\0";
messages = stompDecoder.decode(toByteBuffer(chunk3));
assertEquals(1, messages.size());
assertEquals("Payload2a-Payload2b", new String(messages.get(0).getPayload()));
assertEquals(0, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
}
@Test
public void oneFullAndOneSplitMessageNoContentLength() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk1 = "SEND\na:alpha\n\nPayload1\0SEND\na:alpha\n";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk1));
assertEquals(1, messages.size());
assertEquals("Payload1", new String(messages.get(0).getPayload()));
assertEquals(13, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
String chunk2 = "\nPayload2a";
messages = stompDecoder.decode(toByteBuffer(chunk2));
assertEquals(0, messages.size());
assertEquals(23, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
String chunk3 = "-Payload2b\0";
messages = stompDecoder.decode(toByteBuffer(chunk3));
assertEquals(1, messages.size());
assertEquals("Payload2a-Payload2b", new String(messages.get(0).getPayload()));
assertEquals(0, stompDecoder.getBufferSize());
assertNull(stompDecoder.getExpectedContentLength());
}
@Test
public void oneFullAndOneSplitWithContentLengthExceedingBufferSize() throws InterruptedException {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk1 = "SEND\na:alpha\n\nPayload1\0SEND\ncontent-length:129\n";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk1));
assertEquals("We should have gotten the 1st message", 1, messages.size());
assertEquals("Payload1", new String(messages.get(0).getPayload()));
assertEquals(24, stompDecoder.getBufferSize());
assertEquals(129, (int) stompDecoder.getExpectedContentLength());
try {
String chunk2 = "\nPayload2a";
stompDecoder.decode(toByteBuffer(chunk2));
fail("Expected exception");
}
catch (StompConversionException ex) {
// expected
}
}
@Test(expected = StompConversionException.class)
public void bufferSizeLimit() {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 10);
String payload = "SEND\na:alpha\n\nMessage body";
stompDecoder.decode(toByteBuffer(payload));
}
@Test
public void incompleteCommand() {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk = "MESSAG";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk));
assertEquals(0, messages.size());
}
// SPR-13416
@Test
public void incompleteHeaderWithPartialEscapeSequence() throws Exception {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String chunk = "SEND\na:long\\";
List<Message<byte[]>> messages = stompDecoder.decode(toByteBuffer(chunk));
assertEquals(0, messages.size());
}
@Test(expected = StompConversionException.class)
public void invalidEscapeSequence() {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String payload = "SEND\na:alpha\\x\\n\nMessage body\0";
stompDecoder.decode(toByteBuffer(payload));
}
@Test(expected = StompConversionException.class)
public void invalidEscapeSequenceWithSingleSlashAtEndOfHeaderValue() {
BufferingStompDecoder stompDecoder = new BufferingStompDecoder(STOMP_DECODER, 128);
String payload = "SEND\na:alpha\\\n\nMessage body\0";
stompDecoder.decode(toByteBuffer(payload));
}
private ByteBuffer toByteBuffer(String chunk) {
return ByteBuffer.wrap(chunk.getBytes(StandardCharsets.UTF_8));
}
}