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Official Cloudant client for Java
/*
* Copyright © 2016 IBM Corp. All rights reserved.
*
* 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 com.cloudant.tests;
import static org.hamcrest.CoreMatchers.anyOf;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import com.cloudant.client.api.ClientBuilder;
import com.cloudant.client.api.CloudantClient;
import com.cloudant.client.api.Database;
import com.cloudant.client.org.lightcouch.CouchDbException;
import com.cloudant.client.org.lightcouch.TooManyRequestsException;
import com.cloudant.http.Http;
import com.cloudant.http.HttpConnection;
import com.cloudant.http.HttpConnectionInterceptorContext;
import com.cloudant.http.HttpConnectionRequestInterceptor;
import com.cloudant.http.HttpConnectionResponseInterceptor;
import com.cloudant.http.interceptors.BasicAuthInterceptor;
import com.cloudant.http.interceptors.CookieInterceptor;
import com.cloudant.http.interceptors.Replay429Interceptor;
import com.cloudant.test.main.RequiresCloudant;
import com.cloudant.tests.util.CloudantClientResource;
import com.cloudant.tests.util.DatabaseResource;
import com.cloudant.tests.util.MockWebServerResources;
import com.cloudant.tests.util.HttpFactoryParameterizedTest;
import com.cloudant.tests.util.TestTimer;
import com.cloudant.tests.util.Utils;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.RuleChain;
import org.junit.runners.Parameterized;
import okhttp3.mockwebserver.Dispatcher;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import okhttp3.mockwebserver.RecordedRequest;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
public class HttpTest extends HttpFactoryParameterizedTest {
private String data = "{\"hello\":\"world\"}";
public static CloudantClientResource clientResource = new CloudantClientResource();
public static DatabaseResource dbResource = new DatabaseResource(clientResource);
@ClassRule
public static RuleChain chain = RuleChain.outerRule(clientResource).around(dbResource);
@Rule
public MockWebServer mockWebServer = new MockWebServer();
@Parameterized.Parameters(name = "Using okhttp: {0}")
public static Object[] okUsable() {
return new Object[]{true, false};
}
/*
* Basic test that we can write a document body by POSTing to a known database
*/
@Test
public void testWriteToServerOk() throws Exception {
HttpConnection conn = new HttpConnection("POST", new URL(dbResource.getDbURIWithUserInfo()),
"application/json");
ByteArrayInputStream bis = new ByteArrayInputStream(data.getBytes());
// nothing read from stream
assertEquals(data.getBytes().length, bis.available());
conn.setRequestBody(bis);
HttpConnection response = conn.execute();
// Consume response stream
String responseStr = response.responseAsString();
String okPattern = ".*\"ok\"\\s*:\\s*true.*";
assertTrue("There should be an ok response: " + responseStr, Pattern.compile(okPattern,
Pattern.DOTALL).matcher(responseStr).matches());
// stream was read to end
assertEquals(0, bis.available());
assertEquals("Should be a 2XX response code", 2, response.getConnection().getResponseCode
() / 100);
}
/*
* Basic test to check that an IOException is thrown when we attempt to get the response
* without first calling execute()
*/
@Test
public void testReadBeforeExecute() throws Exception {
HttpConnection conn = new HttpConnection("POST", new URL(dbResource.getDbURIWithUserInfo()),
"application/json");
ByteArrayInputStream bis = new ByteArrayInputStream(data.getBytes());
// nothing read from stream
assertEquals(data.getBytes().length, bis.available());
conn.setRequestBody(bis);
try {
String response = conn.responseAsString();
fail("IOException not thrown as expected instead had response " + response);
} catch (IOException ioe) {
; // "Attempted to read response from server before calling execute()"
}
// stream was not read because execute() was not called
assertEquals(data.getBytes().length, bis.available());
}
//NOTE: This test doesn't work with specified couch servers,
// the URL will always include the creds specified for the test
//
// A couchdb server needs to be set and running with the correct
// security settings, the database *must* not be public, it *must*
// be named cookie_test
//
@Test
@Category(RequiresCloudant.class)
public void testCookieAuthWithoutRetry() throws IOException {
CookieInterceptor interceptor = new CookieInterceptor(CloudantClientHelper.COUCH_USERNAME,
CloudantClientHelper.COUCH_PASSWORD, clientResource.get().getBaseUri().toString());
HttpConnection conn = new HttpConnection("POST", dbResource.get().getDBUri().toURL(),
"application/json");
conn.responseInterceptors.add(interceptor);
conn.requestInterceptors.add(interceptor);
ByteArrayInputStream bis = new ByteArrayInputStream(data.getBytes());
// nothing read from stream
assertEquals(data.getBytes().length, bis.available());
conn.setRequestBody(bis);
HttpConnection responseConn = conn.execute();
// stream was read to end
assertEquals(0, bis.available());
assertEquals(2, responseConn.getConnection().getResponseCode() / 100);
//check the json
Gson gson = new Gson();
InputStream is = responseConn.responseAsInputStream();
try {
JsonObject response = gson.fromJson(new InputStreamReader(is), JsonObject.class);
assertTrue(response.has("ok"));
assertTrue(response.get("ok").getAsBoolean());
assertTrue(response.has("id"));
assertTrue(response.has("rev"));
} finally {
is.close();
}
}
@Test
public void testCookieAuthWithPath() throws Exception {
MockWebServer mockWebServer = new MockWebServer();
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(MockWebServerResources.JSON_OK);
CloudantClient client = ClientBuilder.url(mockWebServer.url("/pathex").url())
.username("user")
.password("password")
.build();
//send single request
client.database("test", true);
assertThat("_session is the second element of the path",
mockWebServer.takeRequest().getPath(),
is("/pathex/_session"));
}
/**
* Test that adding the Basic Authentication interceptor to HttpConnection
* will complete with a response code of 200. The response input stream
* is expected to hold the newly created document's id and rev.
*/
@Test
@Category(RequiresCloudant.class)
public void testBasicAuth() throws IOException {
BasicAuthInterceptor interceptor =
new BasicAuthInterceptor(CloudantClientHelper.COUCH_USERNAME
+ ":" + CloudantClientHelper.COUCH_PASSWORD);
HttpConnection conn = new HttpConnection("POST", dbResource.get().getDBUri().toURL(),
"application/json");
conn.requestInterceptors.add(interceptor);
ByteArrayInputStream bis = new ByteArrayInputStream(data.getBytes());
// nothing read from stream
assertEquals(data.getBytes().length, bis.available());
conn.setRequestBody(bis);
HttpConnection responseConn = conn.execute();
// stream was read to end
assertEquals(0, bis.available());
assertEquals(2, responseConn.getConnection().getResponseCode() / 100);
//check the json
Gson gson = new Gson();
InputStream is = responseConn.responseAsInputStream();
try {
JsonObject response = gson.fromJson(new InputStreamReader(is), JsonObject.class);
assertTrue(response.has("ok"));
assertTrue(response.get("ok").getAsBoolean());
assertTrue(response.has("id"));
assertTrue(response.has("rev"));
} finally {
is.close();
}
}
/**
* This test mocks up a server to receive the _session request and asserts that the request
* body is correctly encoded (per application/x-www-form-urlencoded). Because it requires a
* body this test also relies on Expect: 100-continue working in the client as that is enabled
* by default.
*
* @throws Exception
*/
@Test
public void cookieInterceptorURLEncoding() throws Exception {
final String mockUser = "myStrangeUsername=&?";
String mockPass = "?&=NotAsStrangeInAPassword";
//expect a cookie request then a GET
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse());
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username(mockUser)
.password(mockPass)
.build();
//the GET request will try to get a session, then perform the GET
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
RecordedRequest r = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
String sessionRequestContent = r.getBody().readString(Charset.forName("UTF-8"));
assertNotNull("The _session request should have non-null content",
sessionRequestContent);
//expecting name=...&password=...
String[] parts = Utils.splitAndAssert(sessionRequestContent, "&", 1);
String username = URLDecoder.decode(Utils.splitAndAssert(parts[0], "=", 1)[1], "UTF-8");
assertEquals("The username URL decoded username should match", mockUser,
username);
String password = URLDecoder.decode(Utils.splitAndAssert(parts[1], "=", 1)[1], "UTF-8");
assertEquals("The username URL decoded password should match", mockPass,
password);
}
/**
* This test check that the cookie is renewed if the server presents a Set-Cookie header
* after the cookie authentication.
*
* @throws Exception
*/
@Test
public void cookieRenewal() throws Exception {
final String hello = "{\"hello\":\"world\"}\r\n";
final String authSession = "AuthSession=";
final String renewalCookieToken =
"RenewCookie_a2ltc3RlYmVsOjUxMzRBQTUzOtiY2_IDUIdsTJEVNEjObAbyhrgz";
final String renewalCookieValue = authSession + renewalCookieToken;
// Request sequence
// _session request to get Cookie
// GET request -> 200 with a Set-Cookie
// GET replay -> 200
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse().setResponseCode(200).addHeader("Set-Cookie",
String.format(Locale.ENGLISH, "%s;", renewalCookieValue
+ MockWebServerResources.COOKIE_PROPS))
.setBody(hello));
mockWebServer.enqueue(new MockResponse());
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertEquals("The expected response should be received", hello, response);
// assert that there were 2 calls
assertEquals("The server should have received 2 requests", 2, mockWebServer
.getRequestCount());
assertEquals("The request should have been for /_session", "/_session",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
assertEquals("The request should have been for /", "/",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
String secondResponse = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response" + secondResponse,
secondResponse.isEmpty());
// also assert that there were 3 calls
assertEquals("The server should have received 3 requests", 3, mockWebServer
.getRequestCount());
// this is the request that should have the new cookie.
RecordedRequest request = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertEquals("The request should have been for path /", "/", request.getPath());
String headerValue = request.getHeader("Cookie");
// The cookie may or may not have the session id quoted, so check both
assertThat("The Cookie header should contain the expected session value", headerValue,
anyOf(containsString(renewalCookieValue), containsString(authSession + "\"" +
renewalCookieToken + "\"")));
}
/**
* This test checks that the cookie is successfully renewed if a 403 with an error of
* "credentials_expired" is returned.
*
* @throws Exception
*/
@Test
public void cookie403Renewal() throws Exception {
// Test for a 403 with expired credentials, should result in 4 requests
basic403Test("credentials_expired", "Session expired", 4);
}
/**
* This test checks that if we get a 403 that is not an error of "credentials_expired" then
* the exception is correctly thrown and the error stream is deserialized. This is important
* because the CookieInterceptor will have consumed 403 error streams to check for the expiry.
*
* @throws Exception
*/
@Test
public void handleNonExpiry403() throws Exception {
// Test for a non-expiry 403, expect 2 requests
basic403Test("403_not_expired_test", "example reason", 2);
}
/**
* Same as {@link #handleNonExpiry403()} but with no reason property in the JSON.
*
* @throws Exception
*/
@Test
public void handleNonExpiry403NoReason() throws Exception {
// Test for a non-expiry 403, expect 2 requests
basic403Test("403_not_expired_test", null, 2);
}
/**
* * Same as {@link #handleNonExpiry403()} but with a {@code null} reason property in the JSON.
*
* @throws Exception
*/
@Test
public void handleNonExpiry403NullReason() throws Exception {
// Test for a non-expiry 403, expect 2 requests
basic403Test("403_not_expired_test", "null", 2);
}
/**
* Method that performs a basic test for a 403 response. The sequence of requests is:
*
* - _session request to get Cookie
* - GET request -> a 403 response
* - _session for new cookie*
* - GET replay -> a 200 response*
*
* The requests annotated * should only happen in the credentials_expired 403 case
*
* @param error the response JSON error content for the 403
* @param reason the response JSON reason content for the 403
*/
private void basic403Test(String error, String reason, int expectedRequests) throws
Exception {
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
JsonObject responseBody = new JsonObject();
responseBody.add("error", new JsonPrimitive(error));
JsonElement jsonReason;
if (reason != null) {
if ("null".equals(reason)) {
jsonReason = JsonNull.INSTANCE;
reason = null; // For the assertion we need a real null, not a JsonNull
} else {
jsonReason = new JsonPrimitive(reason);
}
responseBody.add("reason", jsonReason);
}
mockWebServer.enqueue(new MockResponse().setResponseCode(403).setBody(responseBody
.toString()));
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse());
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
//the GET request will try to get a session, then perform the GET
//the GET will result in a 403, which in a renewal case should mean another request to
// _session followed by a replay of GET
try {
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
if (!error.equals("credentials_expired")) {
fail("A 403 not due to cookie expiry should result in a CouchDbException");
}
} catch (CouchDbException e) {
assertEquals("The exception error should be the expected message", error, e.getError());
assertEquals("The exception reason should be the expected message", reason, e
.getReason());
}
// also assert that there were the correct number of calls
assertEquals("The server should receive the expected number of requests",
expectedRequests, mockWebServer
.getRequestCount());
}
@Test
public void inputStreamRetryString() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
String content = "abcde";
request.setRequestBody(content);
testInputStreamRetry(request, content.getBytes("UTF-8"));
}
@Test
public void inputStreamRetryBytes() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
byte[] content = "abcde".getBytes("UTF-8");
request.setRequestBody(content);
testInputStreamRetry(request, content);
}
private static class UnmarkableInputStream extends InputStream {
private final byte[] content;
int read;
int available;
UnmarkableInputStream(byte[] content) {
this.content = content;
available = content.length;
read = 0;
}
@Override
public int read() throws IOException {
if (available == 0) {
return -1;
} else {
int i = content[read];
read++;
available--;
return i;
}
}
@Override
public boolean markSupported() {
return false;
}
}
@Test
public void inputStreamRetry() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
final byte[] content = "abcde".getBytes("UTF-8");
// Mock up an input stream that doesn't support marking
request.setRequestBody(new UnmarkableInputStream(content));
testInputStreamRetry(request, content);
}
@Test
public void inputStreamRetryWithLength() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
final byte[] content = "abcde".getBytes("UTF-8");
// Mock up an input stream that doesn't support marking
request.setRequestBody(new UnmarkableInputStream(content), content.length);
testInputStreamRetry(request, content);
}
private static class TestInputStreamGenerator implements HttpConnection.InputStreamGenerator {
private final byte[] content;
TestInputStreamGenerator(byte[] content) {
this.content = content;
}
@Override
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(content);
}
}
@Test
public void inputStreamRetryGenerator() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
byte[] content = "abcde".getBytes("UTF-8");
request.setRequestBody(new TestInputStreamGenerator(content));
testInputStreamRetry(request, content);
}
@Test
public void inputStreamRetryGeneratorWithLength() throws Exception {
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
byte[] content = "abcde".getBytes("UTF-8");
request.setRequestBody(new TestInputStreamGenerator(content), content.length);
testInputStreamRetry(request, content);
}
private void testInputStreamRetry(HttpConnection request, byte[] expectedContent) throws
Exception {
final MockResponse retry = new MockResponse().setResponseCode(444);
mockWebServer.enqueue(retry);
mockWebServer.enqueue(new MockResponse());
HttpConnection response = CloudantClientHelper.newMockWebServerClientBuilder
(mockWebServer).interceptors(new HttpConnectionResponseInterceptor() {
// This interceptor responds to our 444 request with a retry
@Override
public HttpConnectionInterceptorContext interceptResponse
(HttpConnectionInterceptorContext context) {
try {
if (444 == context.connection.getConnection().getResponseCode()) {
context.replayRequest = true;
}
} catch (IOException e) {
e.printStackTrace();
fail("IOException getting response code in test interceptor");
}
return context;
}
}).build().executeRequest(request);
String responseStr = response.responseAsString();
assertTrue("There should be no response body on the mock response", responseStr.isEmpty());
assertEquals("The final response code should be 200", 200, response.getConnection()
.getResponseCode());
// We want the second request
assertEquals("There should have been two requests", 2, mockWebServer.getRequestCount());
MockWebServerResources.takeRequestWithTimeout(mockWebServer);
RecordedRequest rr = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertNotNull("The request should have been recorded", rr);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream((int) rr
.getBodySize());
rr.getBody().copyTo(byteArrayOutputStream);
assertArrayEquals("The body bytes should have matched after a retry", expectedContent,
byteArrayOutputStream.toByteArray());
}
@Test
public void testCookieRenewOnPost() throws Exception {
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse().setResponseCode(403).setBody
("{\"error\":\"credentials_expired\", \"reason\":\"Session expired\"}\r\n"));
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse());
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
HttpConnection request = Http.POST(mockWebServer.url("/").url(), "application/json");
request.setRequestBody("{\"some\": \"json\"}");
HttpConnection response = c.executeRequest(request);
String responseStr = response.responseAsString();
assertTrue("There should be no response body on the mock response", responseStr.isEmpty());
response.getConnection().getResponseCode();
}
@Test
public void testCustomHeader() throws Exception {
mockWebServer.enqueue(new MockResponse());
final String headerName = "Test-Header";
final String headerValue = "testHeader";
CloudantClient client = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(new HttpConnectionRequestInterceptor() {
@Override
public HttpConnectionInterceptorContext interceptRequest
(HttpConnectionInterceptorContext context) {
context.connection.requestProperties.put(headerName, headerValue);
return context;
}
}).build();
client.getAllDbs();
assertEquals("There should have been 1 request", 1, mockWebServer.getRequestCount());
RecordedRequest request = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertNotNull("The recorded request should not be null", request);
assertNotNull("The custom header should have been present", request.getHeader(headerName));
assertEquals("The custom header should have the specified value", headerValue, request
.getHeader(headerName));
}
/**
* Test that chunking is used when input stream length is not known.
*
* @throws Exception
*/
@Test
public void testChunking() throws Exception {
mockWebServer.enqueue(new MockResponse());
final int chunkSize = 1024 * 8;
final int chunks = 50 * 4;
CloudantClient client = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.build();
// POST some large random data
String response = client.executeRequest(Http.POST(mockWebServer.url("/").url(),
"text/plain")
.setRequestBody(new RandomInputStreamGenerator(chunks * chunkSize)))
.responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
assertEquals("There should have been 1 request", 1, mockWebServer
.getRequestCount());
RecordedRequest request = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertNotNull("The recorded request should not be null", request);
assertNull("There should be no Content-Length header", request.getHeader("Content-Length"));
assertEquals("The Transfer-Encoding should be chunked", "chunked", request.getHeader
("Transfer-Encoding"));
// It would be nice to assert that we got the chunk sizes we were expecting, but sadly the
// HttpURLConnection and ChunkedOutputStream only use the chunkSize as a suggestion and seem
// to use the buffer size instead. The best assertion we can make is that we did receive
// multiple chunks.
assertTrue("There should have been at least 2 chunks", request.getChunkSizes().size() > 1);
}
private static final class RandomInputStreamGenerator implements HttpConnection
.InputStreamGenerator {
final byte[] content;
RandomInputStreamGenerator(int sizeOfRandomContent) {
// Construct a byte array of random data
content = new byte[sizeOfRandomContent];
new java.util.Random().nextBytes(content);
}
@Override
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(content);
}
}
/**
* Test that a request is replayed in response to a 429.
*
* @throws Exception
*/
@Test
public void test429Backoff() throws Exception {
mockWebServer.enqueue(MockWebServerResources.get429());
mockWebServer.enqueue(new MockResponse());
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(Replay429Interceptor.WITH_DEFAULTS)
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
assertEquals("There should be 2 requests", 2, mockWebServer.getRequestCount());
}
/**
* Test that the default maximum number of retries is reached and the backoff is of at least the
* expected duration.
*
* @throws Exception
*/
@Test
public void test429BackoffMaxDefault() throws Exception {
// Always respond 429 for this test
mockWebServer.setDispatcher(MockWebServerResources.ALL_429);
TestTimer t = TestTimer.startTimer();
try {
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(Replay429Interceptor.WITH_DEFAULTS)
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
fail("There should be a TooManyRequestsException instead had response " + response);
} catch (TooManyRequestsException e) {
long duration = t.stopTimer(TimeUnit.MILLISECONDS);
// 3 backoff periods for 4 attempts: 250 + 500 + 1000 = 1750 ms
assertTrue("The duration should be at least 1750 ms, but was " + duration, duration >=
1750);
assertEquals("There should be 4 request attempts", 4, mockWebServer
.getRequestCount());
}
}
/**
* Test that the configured maximum number of retries is reached and the backoff is of at least
* the expected duration.
*
* @throws Exception
*/
@Test
public void test429BackoffMaxConfigured() throws Exception {
// Always respond 429 for this test
mockWebServer.setDispatcher(MockWebServerResources.ALL_429);
TestTimer t = TestTimer.startTimer();
try {
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(new Replay429Interceptor(10, 1, true))
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
fail("There should be a TooManyRequestsException instead had response " + response);
} catch (TooManyRequestsException e) {
long duration = t.stopTimer(TimeUnit.MILLISECONDS);
// 9 backoff periods for 10 attempts: 1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 = 511 ms
assertTrue("The duration should be at least 511 ms, but was " + duration, duration >=
511);
assertEquals("There should be 10 request attempts", 10, mockWebServer
.getRequestCount());
}
}
/**
* Test that the outer number of configured retries takes precedence.
*
* @throws Exception
*/
@Test
public void test429BackoffMaxMoreThanRetriesAllowed() throws Exception {
// Always respond 429 for this test
mockWebServer.setDispatcher(MockWebServerResources.ALL_429);
try {
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(new Replay429Interceptor(10, 1, true))
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri()).setNumberOfRetries(3))
.responseAsString();
fail("There should be a TooManyRequestsException instead had response " + response);
} catch (TooManyRequestsException e) {
assertEquals("There should be 3 request attempts", 3, mockWebServer
.getRequestCount());
}
}
/**
* Test that an integer number of seconds delay specified by a Retry-After header is honoured.
*
* @throws Exception
*/
@Test
public void test429BackoffRetryAfter() throws Exception {
mockWebServer.enqueue(MockWebServerResources.get429().addHeader("Retry-After", "1"));
mockWebServer.enqueue(new MockResponse());
TestTimer t = TestTimer.startTimer();
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(Replay429Interceptor.WITH_DEFAULTS)
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
long duration = t.stopTimer(TimeUnit.MILLISECONDS);
assertTrue("The duration should be at least 1000 ms, but was " + duration, duration >=
1000);
assertEquals("There should be 2 request attempts", 2, mockWebServer
.getRequestCount());
}
@Test
public void test429IgnoreRetryAfter() throws Exception {
mockWebServer.enqueue(MockWebServerResources.get429().addHeader("Retry-After", "1"));
mockWebServer.enqueue(new MockResponse());
TestTimer t = TestTimer.startTimer();
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(new Replay429Interceptor(1, 1, false))
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
long duration = t.stopTimer(TimeUnit.MILLISECONDS);
assertTrue("The duration should be less than 1000 ms, but was " + duration, duration <
1000);
assertEquals("There should be 2 request attempts", 2, mockWebServer
.getRequestCount());
}
/**
* Test the global number of retries
*
* @throws Exception
*/
@Test
public void testHttpConnectionRetries() throws Exception {
// Just return 200 OK
mockWebServer.setDispatcher(new MockWebServerResources.ConstantResponseDispatcher(200));
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.interceptors(new HttpConnectionResponseInterceptor() {
@Override
public HttpConnectionInterceptorContext interceptResponse
(HttpConnectionInterceptorContext context) {
// At least do something with the connection, otherwise we risk breaking it
try {
context.connection.getConnection().getResponseCode();
} catch (IOException e) {
fail("IOException getting response code");
}
// Set to always replay
context.replayRequest = true;
return context;
}
})
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri()).setNumberOfRetries(5))
.responseAsString();
assertTrue("There should be no response body on the mock response", response.isEmpty());
assertEquals("There should be 5 request attempts", 5, mockWebServer
.getRequestCount());
}
/**
* Test that an IllegalArgumentException is thrown if a https proxy address is used. SSL
* proxies are not supported. HTTP proxies can tunnel SSL connections to HTTPS servers.
*
* @throws Exception
*/
@Test(expected = IllegalArgumentException.class)
public void httpsProxyIllegalArgumentException() throws Exception {
// Get a client pointing to an https proxy
CloudantClient client = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.proxyURL(new URL("https://192.0.2.0")).build();
String response = client.executeRequest(Http.GET(client.getBaseUri())).responseAsString();
fail("There should be an IllegalStateException for an https proxy.");
}
/**
* Test that the stored cookie is applied to requests for different URLs. Most of the other
* tests just check a single URL.
*
* @throws Exception
*/
@Test
public void cookieAppliedToDifferentURL() throws Exception {
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
mockWebServer.enqueue(new MockResponse().setBody("first"));
mockWebServer.enqueue(new MockResponse().setBody("second"));
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
URI baseURI = c.getBaseUri();
URL first = new URL(baseURI.getScheme(), baseURI.getHost(), baseURI.getPort(), "/testdb");
String response = c.executeRequest(Http.GET(first)).responseAsString();
assertEquals("The correct response body should be present", "first", response);
// There should be a request for a cookie followed by a the real request
assertEquals("There should be 2 requests", 2, mockWebServer.getRequestCount());
assertEquals("The first request should have been for a cookie", "/_session",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
RecordedRequest request = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertEquals("The second request should have been for /testdb", "/testdb",
request.getPath());
assertNotNull("There should be a cookie on the request", request.getHeader("Cookie"));
// Now make a request to another URL
URL second = new URL(baseURI.getScheme(), baseURI.getHost(), baseURI.getPort(),
"/_all_dbs");
response = c.executeRequest(Http.GET(second)).responseAsString();
assertEquals("The correct response body should be present", "second", response);
// There should now be an additional request
assertEquals("There should be 3 requests", 3, mockWebServer.getRequestCount());
request = MockWebServerResources.takeRequestWithTimeout(mockWebServer);
assertEquals("The second request should have been for /_all_dbs", "/_all_dbs", request
.getPath());
String cookieHeader = request.getHeader("Cookie");
assertNotNull("There should be a cookie on the request", cookieHeader);
assertTrue("The cookie header " + cookieHeader + " should contain the expected value.",
request.getHeader("Cookie").contains(MockWebServerResources.EXPECTED_OK_COOKIE));
}
/**
* Test that cookie authentication is stopped if the credentials were bad.
*
* @throws Exception
*/
@Test
public void badCredsDisablesCookie() throws Exception {
mockWebServer.setDispatcher(new Dispatcher() {
private int counter = 0;
@Override
public MockResponse dispatch(RecordedRequest request) throws InterruptedException {
counter++;
// Return a 401 for the first _session request, after that return 200 OKs
if (counter == 1) {
return new MockResponse().setResponseCode(401);
} else {
return new MockResponse().setBody("TEST");
}
}
});
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("bad")
.password("worse")
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertEquals("The expected response body should be received", "TEST", response);
// There should only be two requests: an initial auth failure followed by an ok response.
// If the cookie interceptor keeps trying then there will be more _session requests.
assertEquals("There should be 2 requests", 2, mockWebServer.getRequestCount());
assertEquals("The first request should have been for a cookie", "/_session",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
assertEquals("The second request should have been for /", "/",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertEquals("The expected response body should be received", "TEST", response);
// Make another request, the cookie interceptor should not try again so there should only be
// one more request.
assertEquals("There should be 3 requests", 3, mockWebServer.getRequestCount());
assertEquals("The third request should have been for /", "/",
MockWebServerResources.takeRequestWithTimeout(mockWebServer).getPath());
}
/**
* Test that having no body and hence no error stream on a 403 response correctly results in the
* 403 causing a CouchDbException with no NPEs.
*
* @throws Exception
*/
@Test(expected = CouchDbException.class)
public void noErrorStream403() throws Exception {
// Respond with a cookie init to the first request to _session
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
// Respond to the executeRequest GET of / with a 403 with no body
mockWebServer.enqueue(new MockResponse().setResponseCode(403));
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
fail("There should be an exception, but received response " + response);
}
/**
* Test that having no body and hence no error stream on a 401 response correctly results in a
* 401 cookie renewal without a NPE.
*
* @throws Exception
*/
@Test
public void noErrorStream401() throws Exception {
// Respond with a cookie init to the first request to _session
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
// Respond to the executeRequest GET of / with a 401 with no body
mockWebServer.enqueue(new MockResponse().setResponseCode(401));
// 401 triggers a renewal so respond with a new cookie for renewal request to _session
mockWebServer.enqueue(MockWebServerResources.OK_COOKIE);
// Finally respond 200 OK with body of "TEST" to the replay of GET to /
mockWebServer.enqueue(new MockResponse().setBody("TEST"));
CloudantClient c = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.username("a")
.password("b")
.build();
String response = c.executeRequest(Http.GET(c.getBaseUri())).responseAsString();
assertEquals("The expected response body should be received", "TEST", response);
}
/**
* Tests that loading the OkHelper will not try to use any classes from outside the
* cloudant-http built classes. Specifically it won't cause any okhttp classes to try to be
* loaded outside of the controlled check for the presence of okhttp.
*
* @throws ClassNotFoundException if the load tries to use any classes it shouldn't
* @throws Exception if there is another issue in the test
*/
@Test
public void okUsableClassLoad() throws ClassNotFoundException, Exception {
// Point to the built classes, it's a bit awkward but we need to load the class cleanly
File f = new File("../cloudant-http/build/classes/main/");
ClassLoader loader = new CloudantHttpIsolationClassLoader(new URL[]{f.toURI().toURL()});
Class okHelperClass = Class.forName("com.cloudant.http.internal.ok.OkHelper"
, true, loader);
assertEquals("The isOkUsable value should be correct", okUsable, okHelperClass.getMethod
("isOkUsable").invoke(null));
}
/**
* A simple classloader that has a null parent classloader when testing okUsable false. This
* isolates classes loaded with this classloader from the test classpath and hence any
* attempt to load a class from the okhttp library will result in a NoClassDefFound.
*/
public class CloudantHttpIsolationClassLoader extends URLClassLoader {
public CloudantHttpIsolationClassLoader(URL[] urls) {
// If we are testing okhttp then allow the parent classloader, otherwise use null
// to isolate okhttp classes from the test load
super(urls, okUsable ? CloudantHttpIsolationClassLoader.class.getClassLoader() : null);
}
@Override
protected Class findClass(String name) throws ClassNotFoundException {
return super.findClass(name);
}
}
}
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