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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2019-2021 Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package fish.payara.ejb.http.endpoint;
import static java.util.Arrays.asList;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.Arrays;
import java.util.Base64;
import java.util.function.BiFunction;
import jakarta.json.bind.JsonbBuilder;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.HEAD;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.core.Response.Status;
import org.glassfish.internal.api.Globals;
import org.glassfish.internal.data.ApplicationInfo;
import org.glassfish.internal.data.ApplicationRegistry;
import com.sun.enterprise.security.ee.auth.login.ProgrammaticLogin;
import fish.payara.ejb.http.protocol.ErrorResponse;
import fish.payara.ejb.http.protocol.InvokeMethodRequest;
import fish.payara.ejb.http.protocol.InvokeMethodResponse;
import fish.payara.ejb.http.protocol.LookupRequest;
import fish.payara.ejb.http.protocol.LookupResponse;
import fish.payara.ejb.http.protocol.MediaTypes;
@Path("/")
public class EjbOverHttpResource {
private static final String INVOKER_V1_REL = "https://payara.fish/ejb-http-invoker/v1";
private static final String INVOKER_V0_REL = "https://payara.fish/ejb-http-invoker/v0";
private final EjbOverHttpService service;
public EjbOverHttpResource() {
this(new EjbOverHttpService() {
@Override
public Object getBean(String jndiName) throws NamingException {
return new InitialContext().lookup(jndiName);
}
@Override
public ClassLoader getAppClassLoader(String applicationName) {
ApplicationRegistry registry = Globals.get(ApplicationRegistry.class);
ApplicationInfo info = registry.get(applicationName);
return info == null ? null : info.getAppClassLoader();
}
});
}
public EjbOverHttpResource(EjbOverHttpService backend) {
this.service = backend;
}
@HEAD
public Response discover() {
return Response.ok()
.link("jndi/lookup", INVOKER_V1_REL)
.link("ejb/lookup", INVOKER_V0_REL)
.build();
}
@POST
@Path("jndi/lookup")
@Produces(MediaTypes.JAVA_OBJECT)
@Consumes(MediaTypes.JAVA_OBJECT)
public Response lookupJavaSerialization(LookupRequest body) {
return lookup(body, MediaTypes.JAVA_OBJECT);
}
@POST
@Path("jndi/lookup")
@Produces(MediaTypes.JSON)
@Consumes(MediaTypes.JSON)
public Response lookupJsonb(LookupRequest body) {
return lookup(body, MediaTypes.JSON);
}
private Response lookup(LookupRequest body, String mediaType) {
try {
return Response
.status(Status.CREATED)
.type(mediaType)
.location(new URI("jndi/invoke"))
.entity(doLookup(body))
.build();
} catch (Exception e) {
return Response
.status(Status.BAD_REQUEST)
.type(mediaType)
.entity(new ErrorResponse(e))
.build();
}
}
@POST
@Path("jndi/invoke")
@Produces(MediaTypes.JAVA_OBJECT)
@Consumes(MediaTypes.JAVA_OBJECT)
public Response invokeJavaSerilaization(InvokeMethodRequest body) {
return invoke(body, MediaTypes.JAVA_OBJECT, (type, result) -> result);
}
@POST
@Path("jndi/invoke")
@Produces(MediaTypes.JSON)
@Consumes(MediaTypes.JSON)
public Response invokeJsonb(InvokeMethodRequest body) {
return invoke(body, MediaTypes.JSON, this::serializeToJsonb);
}
private Reader serializeToJsonb(Type returnType, InvokeMethodResponse result) {
// this is on the edge of JSON-B capabilities, combined with the fact that JAX-RS serialization would run outside the classloaders
// that contain the class definitions.
StringWriter output = new StringWriter();
output.append("{\"type\":\"").append(result.type).append("\"");
if (result != null) {
output.append(",\"result\":");
JsonbBuilder.create().toJson(result.result, returnType, output);
}
output.append("}");
return new StringReader(output.toString());
}
private Response invoke(InvokeMethodRequest body, String mediaType, BiFunction resultSerializer) {
try {
return Response
.status(Status.OK)
.type(mediaType)
.entity(doInvoke(body, resultSerializer))
.build();
} catch (Exception e) {
return Response
.status(Status.BAD_REQUEST)
.type(mediaType)
.entity(new ErrorResponse(e))
.build();
}
}
private LookupResponse doLookup(LookupRequest request) throws Exception {
String jndiName = request.jndiName;
return excuteInAppContext(jndiName, ejb -> {
int bangIndex = jndiName.indexOf('!');
if (bangIndex > 0) {
String className = jndiName.substring(bangIndex + 1);
try {
return new LookupResponse(
Class.forName(className, false, Thread.currentThread().getContextClassLoader()));
} catch (ClassNotFoundException ex) {
NamingException nex = new NamingException("Unknown class: "+className);
nex.initCause(ex);
throw nex;
}
}
// there should only be one interface otherwise plain name would not be allowed (portable names at least)
// in fact, there can be some implementation-specific interfaces in the proxy as well
return new LookupResponse(ejb.getClass().getInterfaces()[0]);
});
}
private Object doInvoke(InvokeMethodRequest request, BiFunction resultMapper) throws Exception {
return excuteInAppContext(request.jndiName, ejb -> {
// Authenticates the caller and if successful sets the security context
// *for the outgoing EJB call*. In other words, the security context for this
// resource will not be changed.
if (!request.principal.isEmpty()) {
new ProgrammaticLogin().login(base64Decode(request.principal), base64Decode(request.credentials), null, true);
}
Class[] argTypes = toClasses(request.argTypes);
Class[] argActualTypes = toClasses(request.argActualTypes);
Method method = findBusinessMethodDeclaration(ejb, request.method, argTypes);
Object result = method.invoke(ejb,
request.argDeserializer.deserialise(request.argValues, method, argActualTypes,
Thread.currentThread().getContextClassLoader()));
return resultMapper.apply(method.getGenericReturnType(), new InvokeMethodResponse(result));
});
}
private static Class[] toClasses(String[] classNames) {
return asList(classNames).stream().map(EjbOverHttpResource::toClass).toArray(Class[]::new);
}
private T excuteInAppContext(String jndiName, EjbOperation operation) throws Exception {
if (!jndiName.startsWith("java:global/")) {
throw new NamingException("Only global names are supported but got: " + jndiName);
}
if (jndiName.indexOf('/', 12) < 0) {
throw new NamingException("Global name must contain application name but got: " + jndiName);
}
Thread currentThread = Thread.currentThread();
String applicationName = jndiName.substring(12, jndiName.indexOf('/', 12));
ClassLoader existingContextClassLoader = currentThread.getContextClassLoader();
ClassLoader appClassLoader = service.getAppClassLoader(applicationName);
if (appClassLoader == null) {
throw new NamingException("Unknown application: " + applicationName);
}
try {
currentThread.setContextClassLoader(appClassLoader);
Object bean = service.getBean(jndiName);
return operation.execute(bean);
} finally {
if (existingContextClassLoader != null) {
currentThread.setContextClassLoader(existingContextClassLoader);
}
}
}
private static String base64Decode(String input) {
return new String(Base64.getDecoder().decode(input));
}
private static Class toClass(String name) {
try {
switch (name) {
case "int":
return int.class;
case "long":
return long.class;
case "short":
return short.class;
case "byte":
return byte.class;
case "boolean":
return boolean.class;
case "float":
return float.class;
case "double":
return double.class;
case "char":
return char.class;
case "void":
return void.class;
default:
return Class.forName(name, true, Thread.currentThread().getContextClassLoader());
}
} catch (ClassNotFoundException e) {
throw new IllegalStateException(e);
}
}
private static Method findBusinessMethodDeclaration(Object ejb, String methodName, Class[] argTypeClasses)
throws NoSuchMethodException {
for (Class intf : ejb.getClass().getInterfaces()) {
try {
return intf.getMethod(methodName, argTypeClasses);
} catch (NoSuchMethodException e) {
// try further
}
}
throw new NoSuchMethodException("No method matching " + methodName + "(" + Arrays.toString(argTypeClasses)
+ ") found in business interface");
}
/**
* Needed because of the {@link Exception} thrown.
*/
interface EjbOperation {
T execute(Object bean) throws Exception;
}
}
