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/*
* 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.coyote.http2;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.Assert;
import org.junit.Test;
import org.apache.tomcat.util.http.Method;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.res.StringManager;
public class TestFlowControl extends Http2TestBase {
private static final StringManager sm = StringManager.getManager(TestFlowControl.class);
/*
* https://tomcat.markmail.org/thread/lijsebphms7hr3zj
*/
@Test
public void testNotFound() throws Exception {
Logger.getLogger("org.apache.coyote.http2").setLevel(Level.ALL);
try {
http2Connect();
// Connection and per-stream flow control default to 64k-1 bytes
// Set up a POST request to a non-existent end-point
// Generate headers
byte[] headersFrameHeader = new byte[9];
ByteBuffer headersPayload = ByteBuffer.allocate(128);
MimeHeaders headers = new MimeHeaders();
headers.addValue(":method").setString(Method.POST);
headers.addValue(":scheme").setString("http");
headers.addValue(":path").setString("/path-does-not-exist");
headers.addValue(":authority").setString("localhost:" + getPort());
headers.addValue("content-length").setLong(65536);
hpackEncoder.encode(headers, headersPayload);
headersPayload.flip();
ByteUtil.setThreeBytes(headersFrameHeader, 0, headersPayload.limit());
headersFrameHeader[3] = FrameType.HEADERS.getIdByte();
// Flags. end of headers (0x04)
headersFrameHeader[4] = 0x04;
// Stream id
ByteUtil.set31Bits(headersFrameHeader, 5, 3);
writeFrame(headersFrameHeader, headersPayload);
// Generate body
// Max data payload is 16k
byte[] dataFrameHeader = new byte[9];
ByteBuffer dataPayload = ByteBuffer.allocate(16 * 1024);
while (dataPayload.hasRemaining()) {
dataPayload.put((byte) 'x');
}
dataPayload.flip();
// Size
ByteUtil.setThreeBytes(dataFrameHeader, 0, dataPayload.limit());
ByteUtil.set31Bits(dataFrameHeader, 5, 3);
// Read the 404 error page
// headers
parser.readFrame();
// body
parser.readFrame();
// reset (because the request body was not fully read)
parser.readFrame();
// Validate response
// Response size varies as error page is generated and includes version
// number
String trace = output.getTrace();
int start = trace.indexOf("[content-length]-[") + 18;
int end = trace.indexOf("]", start);
String contentLength = trace.substring(start, end);
// Language will depend on locale
String language = sm.getLocale().toLanguageTag();
Assert.assertEquals("3-HeadersStart\n" + "3-Header-[:status]-[404]\n" +
"3-Header-[content-type]-[text/html;charset=utf-8]\n" + "3-Header-[content-language]-[" + language +
"]\n" + "3-Header-[content-length]-[" + contentLength + "]\n" +
"3-Header-[date]-[Wed, 11 Nov 2015 19:18:42 GMT]\n" + "3-HeadersEnd\n" + "3-Body-" + contentLength +
"\n" + "3-EndOfStream\n" + "3-RST-[0]\n", output.getTrace());
output.clearTrace();
// Write 3*16k=48k of request body
int count = 0;
while (count < 3) {
writeFrame(dataFrameHeader, dataPayload);
waitForWindowSize(0);
dataPayload.position(0);
count++;
}
// EOS
dataFrameHeader[4] = 0x01;
writeFrame(dataFrameHeader, dataPayload);
waitForWindowSize(0);
} finally {
Logger.getLogger("org.apache.coyote.http2").setLevel(Level.INFO);
}
}
/*
* This might be unnecessary but given the potential for timing differences across different systems a more robust
* approach seems prudent.
*/
private void waitForWindowSize(int streamId) throws Http2Exception, IOException {
String prefix = streamId + "-WindowSize-";
boolean found = false;
String trace;
do {
parser.readFrame();
trace = output.getTrace();
output.clearTrace();
found = trace.startsWith(prefix);
} while (!found);
}
}
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