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282
test/org/apache/coyote/http2/TestHttp2Section_6_9.java
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282
test/org/apache/coyote/http2/TestHttp2Section_6_9.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.coyote.http2;
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import java.nio.ByteBuffer;
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import org.junit.Assert;
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import org.junit.Test;
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/**
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* Unit tests for Section 6.9 of
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* <a href="https://tools.ietf.org/html/rfc7540">RFC 7540</a>.
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* <br>
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* The order of tests in this class is aligned with the order of the
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* requirements in the RFC.
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*/
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public class TestHttp2Section_6_9 extends Http2TestBase {
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@Test
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public void testZeroWindowUpdateConnection() throws Exception {
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http2Connect();
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sendWindowUpdate(0, 0);
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handleGoAwayResponse(1);
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}
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@Test
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public void testZeroWindowUpdateStream() throws Exception {
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http2Connect();
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sendSimplePostRequest(3, null, false);
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sendWindowUpdate(3, 0);
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parser.readFrame(true);
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Assert.assertEquals("3-RST-[" + Http2Error.PROTOCOL_ERROR.getCode() + "]\n",
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output.getTrace());
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}
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@Test
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public void testWindowUpdateOnClosedStream() throws Exception {
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http2Connect();
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// Should not be an error so should be nothing to read
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sendWindowUpdate(1, 200);
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// So the next request should process normally
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sendSimpleGetRequest(3);
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readSimpleGetResponse();
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Assert.assertEquals(getSimpleResponseTrace(3), output.getTrace());
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}
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// TODO: Test always accounting for changes in flow control windows even if
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// the frame is in error.
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@Test
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public void testWindowUpdateWrongLength() throws Exception {
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http2Connect();
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byte[] zeroLengthWindowFrame = new byte[9];
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// Length zero
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ByteUtil.setOneBytes(zeroLengthWindowFrame, 3, FrameType.WINDOW_UPDATE.getIdByte());
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// No flags
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// Stream 1
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ByteUtil.set31Bits(zeroLengthWindowFrame, 5, 1);
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os.write(zeroLengthWindowFrame);
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os.flush();
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handleGoAwayResponse(1, Http2Error.FRAME_SIZE_ERROR);
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}
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@Test
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public void testEmptyDataFrameWithNoAvailableFlowControl() throws Exception {
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http2Connect();
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// Default connection window size is 64k - 1. Initial request will have
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// used 8k (56k -1).
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// Use up the remaining connection window. These requests require 56k
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// but there is only 56k - 1 available.
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for (int i = 3; i < 17; i += 2) {
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sendSimpleGetRequest(i);
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readSimpleGetResponse();
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}
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output.clearTrace();
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// It should be possible to send a request that generates an empty
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// response at this point
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sendEmptyGetRequest(17);
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// Headers
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parser.readFrame(true);
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// Body
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parser.readFrame(true);
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// Release Stream 15 which is waiting for a single byte.
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sendWindowUpdate(0, 1024);
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Assert.assertEquals(getEmptyResponseTrace(17), output.getTrace());
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}
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@Test
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public void testWindowSizeTooLargeStream() throws Exception {
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http2Connect();
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// Set up stream 3
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sendSimplePostRequest(3, null, false);
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// Super size the flow control window.
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sendWindowUpdate(3, (1 << 31) - 1);
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parser.readFrame(true);
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Assert.assertEquals("3-RST-[" + Http2Error.FLOW_CONTROL_ERROR.getCode() + "]\n",
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output.getTrace());
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}
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@Test
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public void testWindowSizeTooLargeConnection() throws Exception {
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http2Connect();
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// Super size the flow control window.
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sendWindowUpdate(0, (1 << 31) - 1);
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handleGoAwayResponse(1, Http2Error.FLOW_CONTROL_ERROR);
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}
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@Test
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public void testWindowSizeAndSettingsFrame() throws Exception {
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http2Connect();
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// Set up a POST request that echoes the body back
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byte[] headersFrameHeader = new byte[9];
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ByteBuffer headersPayload = ByteBuffer.allocate(128);
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byte[] dataFrameHeader = new byte[9];
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ByteBuffer dataPayload = ByteBuffer.allocate(8 * 1024);
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buildPostRequest(headersFrameHeader, headersPayload, false,
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dataFrameHeader, dataPayload, null, 3);
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// Write the headers
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writeFrame(headersFrameHeader, headersPayload);
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// Now use a settings frame to reduce the size of the flow control
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// window.
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sendSettings(0, false, new SettingValue(4, 4 * 1024));
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// Ack
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parser.readFrame(true);
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Assert.assertEquals("0-Settings-Ack\n", output.getTrace());
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output.clearTrace();
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// Write the body
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writeFrame(dataFrameHeader, dataPayload);
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// Window size updates after reading POST body
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parser.readFrame(true);
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parser.readFrame(true);
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Assert.assertEquals(
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"0-WindowSize-[8192]\n" +
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"3-WindowSize-[8192]\n",
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output.getTrace());
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output.clearTrace();
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// Read stream 3 headers and first part of body
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parser.readFrame(true);
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parser.readFrame(true);
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Assert.assertEquals(
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"3-HeadersStart\n" +
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"3-Header-[:status]-[200]\n" +
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"3-Header-[date]-["+ DEFAULT_DATE + "]\n" +
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"3-HeadersEnd\n" +
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"3-Body-4096\n", output.getTrace());
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output.clearTrace();
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// Now use a settings frame to further reduce the size of the flow
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// control window. This should make the stream 3 window negative
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sendSettings(0, false, new SettingValue(4, 2 * 1024));
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// Ack
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parser.readFrame(true);
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Assert.assertEquals("0-Settings-Ack\n", output.getTrace());
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output.clearTrace();
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// Now use a settings frame to increase the size of the flow control
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// window. The stream 3 window should still be negative
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sendSettings(0, false, new SettingValue(4, 3 * 1024));
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// Ack
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parser.readFrame(true);
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Assert.assertEquals("0-Settings-Ack\n", output.getTrace());
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output.clearTrace();
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// Do a POST that won't be affected by the above limit
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sendSimplePostRequest(5, null);
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// Window size updates after reading POST body
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parser.readFrame(true);
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parser.readFrame(true);
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Assert.assertEquals(
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"0-WindowSize-[128]\n" +
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"5-WindowSize-[128]\n",
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output.getTrace());
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output.clearTrace();
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// Headers + body
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parser.readFrame(true);
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parser.readFrame(true);
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Assert.assertEquals(
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"5-HeadersStart\n" +
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"5-Header-[:status]-[200]\n" +
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"5-Header-[content-length]-[128]\n" +
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"5-Header-[date]-[Wed, 11 Nov 2015 19:18:42 GMT]\n" +
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"5-HeadersEnd\n" +
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"5-Body-128\n" +
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"5-EndOfStream\n", output.getTrace());
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output.clearTrace();
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// Now use a settings frame to restore the size of the flow control
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// window.
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sendSettings(0, false, new SettingValue(4, 64 * 1024 - 1));
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// Settings ack and stream 3 body are written from different threads.
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// Order depends on server side timing. Handle both possibilities.
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parser.readFrame(true);
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String trace = output.getTrace();
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String settingsAck = "0-Settings-Ack\n";
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String endOfStreamThree = "3-Body-4096\n3-EndOfStream\n";
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if (settingsAck.equals(trace)) {
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// Ack the end of stream 3
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output.clearTrace();
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parser.readFrame(true);
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Assert.assertEquals(endOfStreamThree, output.getTrace());
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} else {
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// End of stream 3 thenack
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Assert.assertEquals(endOfStreamThree, output.getTrace());
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output.clearTrace();
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parser.readFrame(true);
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Assert.assertEquals(settingsAck, output.getTrace());
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}
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output.clearTrace();
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}
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@Test
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public void testWindowSizeTooLargeViaSettings() throws Exception {
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http2Connect();
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// Set up stream 3
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sendSimplePostRequest(3, null, false);
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// Increase the flow control window but keep it under the limit
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sendWindowUpdate(3, 1 << 30);
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// Now increase beyond the limit via a settings frame
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sendSettings(0, false, new SettingValue(4, 1 << 30));
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// Ack
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parser.readFrame(true);
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Assert.assertEquals("3-RST-[" + Http2Error.FLOW_CONTROL_ERROR.getCode() + "]\n",
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output.getTrace());
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}
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}
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