zrhoffman commented on code in PR #4074: URL: https://github.com/apache/trafficcontrol/pull/4074#discussion_r1014432012
########## traffic_router/core/src/test/java/org/apache/traffic_control/traffic_router/core/external/BufferedResponseTest.java: ########## @@ -0,0 +1,183 @@ +/* + * + * 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.apache.traffic_control.traffic_router.core.external; + +import org.apache.traffic_control.traffic_router.core.http.RouterFilter; +import org.apache.traffic_control.traffic_router.core.util.ExternalTest; +import com.fasterxml.jackson.core.JsonFactory; +import com.fasterxml.jackson.databind.ObjectMapper; +import org.apache.catalina.LifecycleException; +import org.apache.http.Header; +import org.apache.http.client.config.RequestConfig; +import org.apache.http.client.methods.CloseableHttpResponse; +import org.apache.http.client.methods.HttpGet; +import org.apache.http.client.methods.HttpHead; +import org.apache.http.client.methods.HttpRequestBase; +import org.apache.http.impl.client.CloseableHttpClient; +import org.apache.http.impl.client.HttpClientBuilder; +import org.apache.http.util.EntityUtils; +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.junit.experimental.categories.Category; + +import java.io.IOException; +import java.net.URLEncoder; +import java.util.ArrayList; +import java.util.List; + +import static org.hamcrest.Matchers.notNullValue; +import static org.hamcrest.Matchers.nullValue; +import static org.hamcrest.core.IsEqual.equalTo; +import static org.junit.Assert.assertThat; + +@Category(ExternalTest.class) +public class BufferedResponseTest { + final private String routerHttpPort = System.getProperty("routerHttpPort", "8888"); + private CloseableHttpClient httpClient; + + @Before + public void before() throws LifecycleException { + httpClient = HttpClientBuilder.create().build(); + } + + @After + public void after() throws Exception { + if (httpClient != null) httpClient.close(); + } + + @Test + public void itSetsContentLengthHeaderFor404() throws IOException { + final String encodedUrl = URLEncoder.encode("http://trafficrouter01.somedeliveryservice.somecdn.domain.foo/stuff";, "utf-8"); + final HttpGet httpGet = new HttpGet("http://localhost:3333/crs/deliveryservices?url="; + encodedUrl); + CloseableHttpResponse response = null; + + try { + response = httpClient.execute(httpGet); + assertThat(response.getStatusLine().getStatusCode(), equalTo(404)); + assertThat(response.getFirstHeader("Transfer-Encoding"), nullValue()); + assertThat(response.getFirstHeader("Content-Length"), notNullValue()); + } finally { + if (response != null) response.close(); + } + } + + @Test + public void itSetsTheSameContentLengthForHeadAndGet() throws IOException { + final List<String> paths = new ArrayList<>(); + paths.add("http://localhost:3333/crs/stats";); + paths.add("http://localhost:3333/crs/locations/caches";); + paths.add("http://localhost:3333/crs/consistenthash/deliveryservice?deliveryServiceId=csd-target-1&requestPath=/";); + + for (final String path : paths) { + final List<HttpRequestBase> requests = new ArrayList<>(); + requests.add(new HttpHead(path)); + requests.add(new HttpGet(path)); + + final List<Integer> contentLengths = new ArrayList<>(); + + for (final HttpRequestBase request : requests) { + CloseableHttpResponse response = null; + + try { + response = httpClient.execute(request); + final Header contentLengthHeader = response.getFirstHeader("Content-Length"); + + assertThat(response.getFirstHeader("Transfer-Encoding"), nullValue()); + assertThat(contentLengthHeader, notNullValue()); + contentLengths.add(Integer.parseInt(contentLengthHeader.getValue())); + } finally { + if (response != null) response.close(); + } + } + + assertThat(contentLengths.size(), equalTo(2)); + assertThat("Expected HEAD and GET requests for " + path + "to have the same Content-Length", contentLengths.get(0), equalTo(contentLengths.get(1))); + } + } + + @Test + public void itSetsAnAccurateContentLengthForGet() throws IOException { + final List<String> paths = new ArrayList<>(); + paths.add("http://localhost:3333/crs/stats";); + paths.add("http://localhost:3333/crs/locations/caches";); + paths.add("http://localhost:3333/crs/consistenthash/deliveryservice?deliveryServiceId=csd-target-1&requestPath=/";); + + for (final String path : paths) { + CloseableHttpResponse response = null; + + try { + final HttpGet httpGet = new HttpGet(path); + response = httpClient.execute(httpGet); + + final ObjectMapper objectMapper = new ObjectMapper(new JsonFactory()); + final String json = EntityUtils.toString(response.getEntity()); + final Header contentLengthHeader = response.getFirstHeader("Content-Length"); + + /* If the content length is too low and cuts off the response + * body, objectMapper.readTree(json) will likely throw a + * JsonProcessingException. + */ + objectMapper.readTree(json); + assertThat(response.getFirstHeader("Transfer-Encoding"), nullValue()); + assertThat(contentLengthHeader, notNullValue()); + assertThat(Integer.parseInt(contentLengthHeader.getValue()), equalTo(json.length())); + } finally { + if (response != null) response.close(); + } + } + } + + @Test + public void itSetsContentLengthHeaderForDeliveryServiceSteering() throws IOException { + final String testHostName = "tr.client-steering-test-1.thecdn.example.com"; + final RequestConfig config = RequestConfig.custom().setRedirectsEnabled(false).build(); + final List<String> paths = new ArrayList<>(); + paths.add("/qwerytuiop/asdfghjkl?fakeClientIpAddress=12.34.56.78"); + paths.add("/qwerytuiop/asdfghjkl?fakeClientIpAddress=12.34.56.78&format=json"); + paths.add("/qwerytuiop/asdfghjkl?fakeClientIpAddress=12.34.56.78&" + RouterFilter.REDIRECT_QUERY_PARAM + "=false"); + paths.add("/qwerytuiop/asdfghjkl?fakeClientIpAddress=12.34.56.78&" + RouterFilter.REDIRECT_QUERY_PARAM + "=true"); + + + for (final String path : paths) { + final List<HttpRequestBase> requests = new ArrayList<>(); + requests.add(new HttpHead("http://localhost:"; + routerHttpPort + path)); + requests.add(new HttpGet("http://localhost:"; + routerHttpPort + path)); + + final List<Integer> contentLengths = new ArrayList<>(); + + for (final HttpRequestBase request : requests) { + CloseableHttpResponse response = null; + request.setConfig(config); + request.addHeader("Host", testHostName); + + try { + response = httpClient.execute(request); + final Header contentLengthHeader = response.getFirstHeader("Content-Length"); + + assertThat(response.getFirstHeader("Transfer-Encoding"), nullValue()); Review Comment: Using `org.springframework.http.HttpHeaders` in faafed127b -- This is an automated message from the Apache Git Service. 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