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Utility classes and methods developed for Brooklyn but not dependendent on Brooklyn or much else
/*
* 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.brooklyn.util.http;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import org.apache.brooklyn.test.Asserts;
import org.apache.brooklyn.util.collections.MutableMap;
import org.apache.brooklyn.util.exceptions.Exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
/**
* Utility assertions on HTTP.
*
* @author aled
*/
public class HttpAsserts {
private static final Logger LOG = LoggerFactory.getLogger(HttpAsserts.class);
/** @return whether the given HTTP status code is a "success" class code (2xx) */
public static boolean isHealthyStatusCode(int code) {
return code>=200 && code<=299;
}
/** Asserts that the given HTTP status code indicates "success", i.e. {@link #isHealthyStatusCode(int)} is true */
public static void assertHealthyStatusCode(int code) {
if (isHealthyStatusCode(code)) return;
Asserts.fail("Expected success status code, got: " + code);
}
/** Asserts that the given HTTP status code does not indicate "success", i.e. {@link #isHealthyStatusCode(int)} returns false */
public static void assertNotHealthyStatusCode(int code) {
if (!isHealthyStatusCode(code)) return;
Asserts.fail("Expected non-success status code, got: " + code);
}
/** @return whether the given HTTP status code is a "client error" class code (4xx) */
public static boolean isClientErrorStatusCode(int code) {
return code>=400 && code<=499;
}
/** Asserts that the given HTTP status code indicates "client error", i.e. {@link #isClientErrorStatusCode(int)} is true */
public static void assertClientErrorStatusCode(int code) {
if (isClientErrorStatusCode(code)) return;
Asserts.fail("Expected client error status code, got: " + code);
}
/** @return whether the given HTTP status code is a "server error" class code (5xx) */
public static boolean isServerErrorStatusCode(int code) {
return code>=500 && code<=599;
}
/** Asserts that the given HTTP status code indicates "server error", i.e. {@link #isServerErrorStatusCode(int)} is true */
public static void assertServerErrorStatusCode(int code) {
if (isServerErrorStatusCode(code)) return;
Asserts.fail("Expected server error status code, got: " + code);
}
/**
* Asserts that gets back any "valid" response - i.e. not an exception. This could be an unauthorized,
* a redirect, a 404, or anything else that implies there is web-server listening on that port.
*
* @param url The URL to connect to.
*/
public static void assertUrlReachable(String url) {
try {
HttpTool.getHttpStatusCode(url);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException("Interrupted for "+url+" (in assertion that is reachable)", e);
} catch (Exception e) {
throw new IllegalStateException("Server at "+url+" Asserts.failed to respond (in assertion that is reachable): "+e, e);
}
}
/**
* Asserts that the URL could not be reached, detected as an IOException.
*
* @param url The URL to connect to.
*/
public static void assertUrlUnreachable(String url) {
try {
int statusCode = HttpTool.getHttpStatusCode(url);
Asserts.fail("Expected url " + url + " unreachable, but got status code " + statusCode);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException("Interrupted for "+url+" (in assertion that unreachable)", e);
} catch (Exception e) {
IOException cause = Exceptions.getFirstThrowableOfType(e, IOException.class);
if (cause != null) {
// success; clean shutdown transitioning from 400 to error
} else {
propagateAsAssertionError(e);
}
}
}
/**
* Asserts that the URL becomes unreachable within a default time period.
*
* @param url The URL
*/
public static void assertUrlUnreachableEventually(final String url) {
assertUrlUnreachableEventually(Maps.newLinkedHashMap(), url);
}
/**
* Asserts that the URL becomes unreachable within a configurable time period.
*
* @param flags The flags controlling the timeout.
* For details see {@link org.apache.brooklyn.test.Asserts#succeedsEventually(java.util.Map, java.util.concurrent.Callable)}
* @param url The URL
*/
public static void assertUrlUnreachableEventually(Map flags, final String url) {
assertEventually(flags, new Runnable() {
@Override
public void run() {
assertUrlUnreachable(url);
}
});
}
/**
* Assert that the status code returned from the URL is in the given codes.
*
* @param url The URL to get.
* @param acceptableReturnCodes The return codes that are expected.
*/
public static void assertHttpStatusCodeEquals(String url, int... acceptableReturnCodes) {
List acceptableCodes = Lists.newArrayList();
for (int code : acceptableReturnCodes) {
acceptableCodes.add(code);
}
try {
int actualCode = HttpTool.getHttpStatusCode(url);
Asserts.assertTrue(acceptableCodes.contains(actualCode), "code=" + actualCode + "; expected=" + acceptableCodes + "; url=" + url);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException("Interrupted for "+url+" (in assertion that result code is "+acceptableCodes+")", e);
} catch (Exception e) {
throw new IllegalStateException("Server at "+url+" Asserts.failed to respond (in assertion that result code is "+acceptableCodes+"): "+e, e);
}
}
public static void assertHttpStatusCodeEventuallyEquals(final String url, final int expectedCode) {
assertHttpStatusCodeEventuallyEquals(Maps.newLinkedHashMap(), url, expectedCode);
}
public static void assertHttpStatusCodeEventuallyEquals(Map flags, final String url, final int expectedCode) {
assertEventually(flags, new Runnable() {
@Override
public void run() {
assertHttpStatusCodeEquals(url, expectedCode);
}
});
}
public static void assertContentContainsText(final String url, final String phrase, final String ...additionalPhrases) {
try {
String contents = HttpTool.getContent(url);
Asserts.assertTrue(contents != null && contents.length() > 0);
for (String text: Lists.asList(phrase, additionalPhrases)) {
if (!contents.contains(text)) {
LOG.warn("CONTENTS OF URL "+url+" MISSING TEXT: "+text+"\n"+contents);
Asserts.fail("URL "+url+" does not contain text: "+text);
}
}
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
public static void assertContentNotContainsText(final String url, final String phrase, final String ...additionalPhrases) {
try {
String contents = HttpTool.getContent(url);
Asserts.assertTrue(contents != null);
for (String text: Lists.asList(phrase, additionalPhrases)) {
if (contents.contains(text)) {
LOG.warn("CONTENTS OF URL "+url+" HAS TEXT: "+text+"\n"+contents);
Asserts.fail("URL "+url+" contain text: "+text);
}
}
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
public static void assertErrorContentContainsText(final String url, final String phrase, final String ...additionalPhrases) {
try {
String contents = HttpTool.getErrorContent(url);
Asserts.assertTrue(contents != null && contents.length() > 0);
for (String text: Lists.asList(phrase, additionalPhrases)) {
if (!contents.contains(text)) {
LOG.warn("CONTENTS OF URL "+url+" MISSING TEXT: "+text+"\n"+contents);
Asserts.fail("URL "+url+" does not contain text: "+text);
}
}
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
public static void assertErrorContentNotContainsText(final String url, final String phrase, final String ...additionalPhrases) {
try {
String err = HttpTool.getErrorContent(url);
Asserts.assertTrue(err != null);
for (String text: Lists.asList(phrase, additionalPhrases)) {
if (err.contains(text)) {
LOG.warn("CONTENTS OF URL "+url+" HAS TEXT: "+text+"\n"+err);
Asserts.fail("URL "+url+" contain text: "+text);
}
}
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
private static AssertionError propagateAsAssertionError(Exception e) {
final AssertionError assertionError = new AssertionError("Assertion failed", e);
return assertionError;
}
public static void assertContentEventuallyContainsText(final String url, final String phrase, final String ...additionalPhrases) {
assertContentEventuallyContainsText(MutableMap.of(), url, phrase, additionalPhrases);
}
public static void assertContentEventuallyContainsText(Map flags, final String url, final String phrase, final String ...additionalPhrases) {
assertEventually(flags, new Runnable() {
@Override
public void run() {
assertContentContainsText(url, phrase, additionalPhrases);
}
});
}
private static void assertEventually(Map flags, Runnable r) {
try {
Asserts.succeedsEventually(flags, r);
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
private static void assertEventually(Runnable r) {
try {
Asserts.succeedsEventually(r);
} catch (Exception e) {
throw propagateAsAssertionError(e);
}
}
public static void assertContentMatches(String url, String regex) {
String contents = HttpTool.getContent(url);
Asserts.assertNotNull(contents);
Asserts.assertTrue(contents.matches(regex), "Contents does not match expected regex ("+regex+"): "+contents);
}
public static void assertContentEventuallyMatches(final String url, final String regex) {
assertEventually(new Runnable() {
@Override
public void run() {
assertContentMatches(url, regex);
}
});
}
public static void assertContentEventuallyMatches(Map flags, final String url, final String regex) {
assertEventually(flags, new Runnable() {
@Override
public void run() {
assertContentMatches(url, regex);
}
});
}
/**
* Schedules (with the given executor) a poller that repeatedly accesses the given url, to confirm it always gives
* back the expected status code.
*
* Expected usage is to query the future, such as:
*
*
* {@code
* Future future = assertAsyncHttpStatusCodeContinuallyEquals(executor, url, 200);
* // do other stuff...
* if (future.isDone()) future.get(); // get exception if its Asserts.failed
* }
*
*
* NOTE that the exception thrown by future.get() is a java.util.concurrent.ExecutionException,
* not an AssertionError.
*
* For stopping it, you can either do future.cancel(true), or you can just do executor.shutdownNow().
*
* TODO Look at difference between this and WebAppMonitor, to decide if this should be kept.
*/
public static ListenableFuture assertAsyncHttpStatusCodeContinuallyEquals(ListeningExecutorService executor, final String url, final int expectedStatusCode) {
return executor.submit(new Runnable() {
@Override public void run() {
// TODO Need to drop logging; remove sleep when that's done.
while (!Thread.currentThread().isInterrupted()) {
assertHttpStatusCodeEquals(url, expectedStatusCode);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
return; // graceful return
}
}
}
});
}
}