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// Copyright (C) 2019 The Android Open Source Project
//
// 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.google.gerrit.acceptance.rest.binding;
import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.gerrit.acceptance.AbstractDaemonTest;
import com.google.gerrit.acceptance.rest.util.RestApiCallHelper;
import com.google.gerrit.acceptance.rest.util.RestCall;
import com.google.gerrit.acceptance.rest.util.RestCall.Method;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.restapi.ChildCollection;
import com.google.gerrit.extensions.restapi.IdString;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestApiModule;
import com.google.gerrit.extensions.restapi.RestCollectionModifyView;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.extensions.restapi.RestResource;
import com.google.gerrit.extensions.restapi.RestView;
import com.google.gerrit.extensions.restapi.TopLevelResource;
import com.google.gerrit.httpd.restapi.RestApiServlet;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.TypeLiteral;
import com.google.inject.servlet.ServletModule;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import org.junit.Test;
/**
* Tests for checking plugin-provided REST API bindings directly under {@code /}.
*
* <p>These tests only verify that the plugin-provided REST endpoints are correctly bound, they do
* not test the functionality of the plugin REST endpoints.
*/
public class PluginProvidedRootRestApiBindingsIT extends AbstractDaemonTest {
/** Resource to bind a child collection. */
public static final TypeLiteral<RestView<TestPluginResource>> TEST_KIND =
new TypeLiteral<RestView<TestPluginResource>>() {};
private static final String PLUGIN_NAME = "my-plugin";
private static final ImmutableSet<RestCall> TEST_CALLS =
ImmutableSet.of(
RestCall.get("/plugins/" + PLUGIN_NAME + "/test-collection/"),
RestCall.get("/plugins/" + PLUGIN_NAME + "/test-collection/1/detail"),
RestCall.post("/plugins/" + PLUGIN_NAME + "/test-collection/"),
RestCall.post("/plugins/" + PLUGIN_NAME + "/test-collection/1/update"),
RestCall.builder(Method.GET, "/plugins/" + PLUGIN_NAME + "/not-found")
.expectedResponseCode(SC_NOT_FOUND)
.build());
/** Module for all HTTP bindings. */
static class MyPluginHttpModule extends ServletModule {
@Override
public void configureServlets() {
bind(TestRootCollection.class);
install(
new RestApiModule() {
@Override
public void configure() {
DynamicMap.mapOf(binder(), TEST_KIND);
postOnCollection(TEST_KIND).to(TestPostOnCollection.class);
post(TEST_KIND, "update").to(TestPost.class);
get(TEST_KIND, "detail").to(TestGet.class);
}
});
serveRegex("/(?:a/)?test-collection/(.*)$").with(TestRestApiServlet.class);
}
}
@Singleton
static class TestRestApiServlet extends RestApiServlet {
private static final long serialVersionUID = 1L;
@Inject
TestRestApiServlet(RestApiServlet.Globals globals, Provider<TestRootCollection> collection) {
super(globals, collection);
}
@Override
public void service(ServletRequest servletRequest, ServletResponse servletResponse)
throws ServletException, IOException {
// This is...unfortunate. HttpPluginServlet (and/or ContextMapper) doesn't properly set the
// servlet path on the wrapped request. Based on what RestApiServlet produces for non-plugin
// requests, it should be:
// contextPath = "/plugins/checks"
// servletPath = "/checkers/"
// pathInfo = checkerUuid
// Instead it does:
// contextPath = "/plugins/checks"
// servletPath = ""
// pathInfo = "/checkers/" + checkerUuid
// This results in RestApiServlet splitting the pathInfo into ["", "checkers", checkerUuid],
// and it passes the "" to CheckersCollection#parse, which understandably, but unfortunately,
// fails.
//
// This frankly seems like a bug that should be fixed, but it would quite likely break
// existing plugins in confusing ways. So, we work around it by introducing our own request
// wrapper with the correct paths.
HttpServletRequest req = (HttpServletRequest) servletRequest;
String pathInfo = req.getPathInfo();
String correctServletPath = "/test-collection/";
String fixedPathInfo = pathInfo.substring(correctServletPath.length());
HttpServletRequestWrapper wrapped =
new HttpServletRequestWrapper(req) {
@Override
public String getServletPath() {
return correctServletPath;
}
@Override
public String getPathInfo() {
return fixedPathInfo;
}
};
super.service(wrapped, (HttpServletResponse) servletResponse);
}
}
static class TestPluginResource implements RestResource {}
@Singleton
static class TestRootCollection implements ChildCollection<TopLevelResource, TestPluginResource> {
private final DynamicMap<RestView<TestPluginResource>> views;
@Inject
TestRootCollection(DynamicMap<RestView<TestPluginResource>> views) {
this.views = views;
}
@Override
public RestView<TopLevelResource> list() throws RestApiException {
return (RestReadView<TopLevelResource>) resource -> ImmutableList.of("one", "two");
}
@Override
public TestPluginResource parse(TopLevelResource parent, IdString id) throws Exception {
return new TestPluginResource();
}
@Override
public DynamicMap<RestView<TestPluginResource>> views() {
return views;
}
}
@Singleton
static class TestPostOnCollection
implements RestCollectionModifyView<TopLevelResource, TestPluginResource, String> {
@Override
public Object apply(TopLevelResource parentResource, String input) throws Exception {
return "test";
}
}
@Singleton
static class TestPost implements RestModifyView<TestPluginResource, String> {
@Override
public String apply(TestPluginResource resource, String input) throws Exception {
return "test";
}
}
@Singleton
static class TestGet implements RestReadView<TestPluginResource> {
@Override
public String apply(TestPluginResource resource) throws Exception {
return "test";
}
}
@Test
public void testEndpoints() throws Exception {
try (AutoCloseable ignored = installPlugin(PLUGIN_NAME, null, MyPluginHttpModule.class, null)) {
RestApiCallHelper.execute(adminRestSession, TEST_CALLS.asList());
}
}
}