Java tutorial
/* * Copyright 2014 JBoss Inc * * 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 io.apiman.manager.ui.server.servlets; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.IOUtils; import com.fasterxml.jackson.annotation.JsonInclude.Include; import com.fasterxml.jackson.core.JsonEncoding; import com.fasterxml.jackson.core.JsonFactory; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.ObjectMapper; import io.apiman.manager.ui.server.UIVersion; import io.apiman.manager.ui.server.auth.ITokenGenerator; import io.apiman.manager.ui.server.beans.ApiAuthConfigurationBean; import io.apiman.manager.ui.server.beans.ApiAuthType; import io.apiman.manager.ui.server.beans.ApiConfigurationBean; import io.apiman.manager.ui.server.beans.AppConfigurationBean; import io.apiman.manager.ui.server.beans.BasicAuthCredentialsBean; import io.apiman.manager.ui.server.beans.ConfigurationBean; import io.apiman.manager.ui.server.beans.UiConfigurationBean; import io.apiman.manager.ui.server.beans.UserConfigurationBean; /** * Generates the initial configuration JSON used by the UI when it first loads * up. This initial JSON is loaded into the client-side. * * Also responsible for pushing updated configuration to the client if it * changes. * * @author eric.wittmann@redhat.com */ public class ConfigurationServlet extends AbstractUIServlet { private static final long serialVersionUID = -1529967410524613367L; /** * Constructor. */ public ConfigurationServlet() { } /** * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, * javax.servlet.http.HttpServletResponse) */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { Class.forName("io.apiman.manager.ui.server.UIConfig"); //$NON-NLS-1$ } catch (Throwable t) { t.printStackTrace(); } JsonGenerator g = null; try { response.getOutputStream().write("window.APIMAN_CONFIG_DATA = ".getBytes("UTF-8")); //$NON-NLS-1$ //$NON-NLS-2$ JsonFactory f = new JsonFactory(); g = f.createGenerator(response.getOutputStream(), JsonEncoding.UTF8); ObjectMapper mapper = new ObjectMapper(); mapper.setSerializationInclusion(Include.NON_NULL); g.setCodec(mapper); g.useDefaultPrettyPrinter(); // Get data from various sources. String endpoint = getConfig().getManagementApiEndpoint(); if (endpoint == null) { endpoint = getDefaultEndpoint(request); } UIVersion version = UIVersion.get(); ApiAuthType authType = getConfig().getManagementApiAuthType(); ConfigurationBean configBean = new ConfigurationBean(); configBean.setApiman(new AppConfigurationBean()); configBean.setUser(new UserConfigurationBean()); configBean.setUi(new UiConfigurationBean()); configBean.setApi(new ApiConfigurationBean()); configBean.getUi().setHeader("community"); //$NON-NLS-1$ configBean.getUi().setMetrics(getConfig().isMetricsEnabled()); configBean.getUi().setPlatform(getConfig().getPlatform()); configBean.getApiman().setVersion(version.getVersionString()); configBean.getApiman().setBuiltOn(version.getVersionDate()); configBean.getApiman().setLogoutUrl(getConfig().getLogoutUrl()); configBean.getUser().setUsername(request.getRemoteUser()); configBean.getApi().setEndpoint(endpoint); configBean.getApi().setAuth(new ApiAuthConfigurationBean()); switch (authType) { case authToken: { configBean.getApi().getAuth().setType(ApiAuthType.authToken); String tokenGeneratorClassName = getConfig().getManagementApiAuthTokenGenerator(); if (tokenGeneratorClassName == null) { throw new ServletException("No token generator class specified."); //$NON-NLS-1$ } Class<?> c = Class.forName(tokenGeneratorClassName); ITokenGenerator tokenGenerator = (ITokenGenerator) c.newInstance(); configBean.getApi().getAuth().setBearerToken(tokenGenerator.generateToken(request)); break; } case basic: { configBean.getApi().getAuth().setType(ApiAuthType.basic); configBean.getApi().getAuth().setBasic(new BasicAuthCredentialsBean()); String username = getConfig().getManagementApiAuthUsername(); String password = getConfig().getManagementApiAuthPassword(); configBean.getApi().getAuth().getBasic().setUsername(username); configBean.getApi().getAuth().getBasic().setPassword(password); break; } case bearerToken: { configBean.getApi().getAuth().setType(ApiAuthType.bearerToken); String tokenGeneratorClassName = getConfig().getManagementApiAuthTokenGenerator(); if (tokenGeneratorClassName == null) throw new ServletException("No token generator class specified."); //$NON-NLS-1$ Class<?> c = Class.forName(tokenGeneratorClassName); ITokenGenerator tokenGenerator = (ITokenGenerator) c.newInstance(); configBean.getApi().getAuth().setBearerToken(tokenGenerator.generateToken(request)); break; } case samlBearerToken: { configBean.getApi().getAuth().setType(ApiAuthType.samlBearerToken); String tokenGeneratorClassName = getConfig().getManagementApiAuthTokenGenerator(); if (tokenGeneratorClassName == null) throw new ServletException("No token generator class specified."); //$NON-NLS-1$ Class<?> c = Class.forName(tokenGeneratorClassName); ITokenGenerator tokenGenerator = (ITokenGenerator) c.newInstance(); configBean.getApi().getAuth().setBearerToken(tokenGenerator.generateToken(request)); break; } } g.writeObject(configBean); g.flush(); response.getOutputStream().write(";".getBytes("UTF-8")); //$NON-NLS-1$ //$NON-NLS-2$ } catch (Exception e) { throw new ServletException(e); } finally { IOUtils.closeQuietly(g); } } }