| /* |
| * Copyright (c) OSGi Alliance (2000, 2013). 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 org.osgi.service.http; |
| |
| import java.util.Dictionary; |
| import javax.servlet.Servlet; |
| import javax.servlet.ServletException; |
| |
| /** |
| * The Http Service allows other bundles in the OSGi environment to dynamically |
| * register resources and servlets into the URI namespace of Http Service. A |
| * bundle may later unregister its resources or servlets. |
| * |
| * @noimplement |
| * @author $Id$ |
| * @see HttpContext |
| */ |
| public interface HttpService { |
| /** |
| * Registers a servlet into the URI namespace. |
| * |
| * <p> |
| * The alias is the name in the URI namespace of the Http Service at which |
| * the registration will be mapped. |
| * |
| * <p> |
| * An alias must begin with slash ('/') and must not end with slash ('/'), |
| * with the exception that an alias of the form "/" is used to |
| * denote the root alias. See the specification text for details on how HTTP |
| * requests are mapped to servlet and resource registrations. |
| * |
| * <p> |
| * The Http Service will call the servlet's {@code init} method before |
| * returning. |
| * |
| * <pre> |
| * httpService.registerServlet("/myservlet", servlet, initparams, context); |
| * </pre> |
| * |
| * <p> |
| * Servlets registered with the same {@code HttpContext} object will share |
| * the same {@code ServletContext}. The Http Service will call the |
| * {@code context} argument to support the {@code ServletContext} methods |
| * {@code getResource},{@code getResourceAsStream} and {@code getMimeType}, |
| * and to handle security for requests. If the {@code context} argument is |
| * {@code null}, a default {@code HttpContext} object is used (see |
| * {@link #createDefaultHttpContext()}). |
| * |
| * @param alias name in the URI namespace at which the servlet is registered |
| * @param servlet the servlet object to register |
| * @param initparams initialization arguments for the servlet or |
| * {@code null} if there are none. This argument is used by the |
| * servlet's {@code ServletConfig} object. |
| * @param context the {@code HttpContext} object for the registered servlet, |
| * or {@code null} if a default {@code HttpContext} is to be created |
| * and used. |
| * @throws NamespaceException if the registration fails because the alias is |
| * already in use. |
| * @throws javax.servlet.ServletException if the servlet's {@code init} |
| * method throws an exception, or the given servlet object has |
| * already been registered at a different alias. |
| * @throws java.lang.IllegalArgumentException if any of the arguments are |
| * invalid |
| */ |
| public void registerServlet(String alias, Servlet servlet, Dictionary initparams, HttpContext context) throws ServletException, NamespaceException; |
| |
| /** |
| * Registers resources into the URI namespace. |
| * |
| * <p> |
| * The alias is the name in the URI namespace of the Http Service at which |
| * the registration will be mapped. An alias must begin with slash ('/') and |
| * must not end with slash ('/'), with the exception that an alias of the |
| * form "/" is used to denote the root alias. The name parameter |
| * must also not end with slash ('/') with the exception that a name of the |
| * form "/" is used to denote the root of the bundle. See the |
| * specification text for details on how HTTP requests are mapped to servlet |
| * and resource registrations. |
| * <p> |
| * For example, suppose the resource name /tmp is registered to the alias |
| * /files. A request for /files/foo.txt will map to the resource name |
| * /tmp/foo.txt. |
| * |
| * <pre> |
| * httpservice.registerResources("/files", "/tmp", context); |
| * </pre> |
| * |
| * The Http Service will call the {@code HttpContext} argument to map |
| * resource names to URLs and MIME types and to handle security for |
| * requests. If the {@code HttpContext} argument is {@code null}, a default |
| * {@code HttpContext} is used (see {@link #createDefaultHttpContext()}). |
| * |
| * @param alias name in the URI namespace at which the resources are |
| * registered |
| * @param name the base name of the resources that will be registered |
| * @param context the {@code HttpContext} object for the registered |
| * resources, or {@code null} if a default {@code HttpContext} is to |
| * be created and used. |
| * @throws NamespaceException if the registration fails because the alias is |
| * already in use. |
| * @throws java.lang.IllegalArgumentException if any of the parameters are |
| * invalid |
| */ |
| public void registerResources(String alias, String name, HttpContext context) throws NamespaceException; |
| |
| /** |
| * Unregisters a previous registration done by {@code registerServlet} or |
| * {@code registerResources} methods. |
| * |
| * <p> |
| * After this call, the registered alias in the URI name-space will no |
| * longer be available. If the registration was for a servlet, the Http |
| * Service must call the {@code destroy} method of the servlet before |
| * returning. |
| * <p> |
| * If the bundle which performed the registration is stopped or otherwise |
| * "unget"s the Http Service without calling {@link #unregister(String)} |
| * then Http Service must automatically unregister the registration. |
| * However, if the registration was for a servlet, the {@code destroy} |
| * method of the servlet will not be called in this case since the bundle |
| * may be stopped. {@link #unregister(String)} must be explicitly called to |
| * cause the {@code destroy} method of the servlet to be called. This can be |
| * done in the {@code BundleActivator.stop} method of the bundle registering |
| * the servlet. |
| * |
| * @param alias name in the URI name-space of the registration to unregister |
| * @throws java.lang.IllegalArgumentException if there is no registration |
| * for the alias or the calling bundle was not the bundle which |
| * registered the alias. |
| */ |
| public void unregister(String alias); |
| |
| /** |
| * Creates a default {@code HttpContext} for registering servlets or |
| * resources with the HttpService, a new {@code HttpContext} object is |
| * created each time this method is called. |
| * |
| * <p> |
| * The behavior of the methods on the default {@code HttpContext} is defined |
| * as follows: |
| * <ul> |
| * <li>{@code getMimeType} - Does not define any customized MIME types for |
| * the Content-Type header in the response, and always returns {@code null}. |
| * </li> |
| * <li>{@code handleSecurity} - Performs implementation-defined |
| * authentication on the request.</li> |
| * <li>{@code getResource} - Assumes the named resource is in the context |
| * bundle; this method calls the context bundle's {@code Bundle.getResource} |
| * method, and returns the appropriate URL to access the resource. On a Java |
| * runtime environment that supports permissions, the Http Service needs to |
| * be granted {@code org.osgi.framework.AdminPermission[*,RESOURCE]}.</li> |
| * </ul> |
| * |
| * @return a default {@code HttpContext} object. |
| * @since 1.1 |
| */ |
| public HttpContext createDefaultHttpContext(); |
| } |