Java tutorial
/** * <a href="http://www.openolat.org"> * OpenOLAT - Online Learning and Training</a><br> * <p> * Licensed under the Apache License, Version 2.0 (the "License"); <br> * you may not use this file except in compliance with the License.<br> * You may obtain a copy of the License at the * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a> * <p> * Unless required by applicable law or agreed to in writing,<br> * software distributed under the License is distributed on an "AS IS" BASIS, <br> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br> * See the License for the specific language governing permissions and <br> * limitations under the License. * <p> * Initial code contributed and copyrighted by<br> * frentix GmbH, http://www.frentix.com * <p> */ package org.olat.modules.tu; import java.io.IOException; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.client.utils.URIBuilder; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import org.olat.basesecurity.BaseSecurityModule; import org.olat.core.CoreSpringFactory; import org.olat.core.dispatcher.mapper.Mapper; import org.olat.core.gui.media.HttpRequestMediaResource; import org.olat.core.gui.media.MediaResource; import org.olat.core.gui.media.NotFoundMediaResource; import org.olat.core.id.Identity; import org.olat.core.id.User; import org.olat.core.id.UserConstants; import org.olat.core.logging.OLog; import org.olat.core.logging.Tracing; import org.olat.core.util.StringHelper; /** * * Rewrite of the intern class with http client 4.3 * * Initial date: 30.09.2013<br> * @author srosse, stephane.rosse@frentix.com, http://www.frentix.com * */ public class TunnelMapper implements Mapper { private static final OLog log = Tracing.createLoggerFor(TunnelMapper.class); private final String proto; private final String host; private final Integer port; private final String startUri; private final String ipAddress; private final Identity ident; private final HttpClient httpClient; public TunnelMapper(String proto, String host, Integer port, String startUri, String ipAddress, Identity ident, HttpClient httpClient) { this.proto = proto; this.host = host; this.port = port; this.startUri = startUri; this.ipAddress = ipAddress; this.ident = ident; this.httpClient = httpClient; } @Override public MediaResource handle(String relPath, HttpServletRequest hreq) { String method = hreq.getMethod(); String uri = relPath; HttpUriRequest meth = null; try { URIBuilder builder = new URIBuilder(); builder.setScheme(proto).setHost(host).setPort(port.intValue()); if (uri == null) { uri = (startUri == null) ? "" : startUri; } if (uri.length() > 0 && uri.charAt(0) != '/') { uri = "/" + uri; } if (StringHelper.containsNonWhitespace(uri)) { builder.setPath(uri); } if (method.equals("GET")) { String queryString = hreq.getQueryString(); if (StringHelper.containsNonWhitespace(queryString)) { builder.setCustomQuery(queryString); } meth = new HttpGet(builder.build()); } else if (method.equals("POST")) { Map<String, String[]> params = hreq.getParameterMap(); HttpPost pmeth = new HttpPost(builder.build()); List<BasicNameValuePair> pairs = new ArrayList<BasicNameValuePair>(); for (String key : params.keySet()) { String vals[] = params.get(key); for (String val : vals) { pairs.add(new BasicNameValuePair(key, val)); } } HttpEntity entity = new UrlEncodedFormEntity(pairs, "UTF-8"); pmeth.setEntity(entity); meth = pmeth; } // Add olat specific headers to the request, can be used by external // applications to identify user and to get other params // test page e.g. http://cgi.algonet.se/htbin/cgiwrap/ug/test.py if ("enabled".equals( CoreSpringFactory.getImpl(BaseSecurityModule.class).getUserInfosTunnelCourseBuildingBlock())) { User u = ident.getUser(); meth.addHeader("X-OLAT-USERNAME", ident.getName()); meth.addHeader("X-OLAT-LASTNAME", u.getProperty(UserConstants.LASTNAME, null)); meth.addHeader("X-OLAT-FIRSTNAME", u.getProperty(UserConstants.FIRSTNAME, null)); meth.addHeader("X-OLAT-EMAIL", u.getProperty(UserConstants.EMAIL, null)); meth.addHeader("X-OLAT-USERIP", ipAddress); } HttpResponse response = httpClient.execute(meth); if (response == null) { // error return new NotFoundMediaResource(relPath); } // get or post successfully Header responseHeader = response.getFirstHeader("Content-Type"); if (responseHeader == null) { // error EntityUtils.consumeQuietly(response.getEntity()); return new NotFoundMediaResource(relPath); } return new HttpRequestMediaResource(response); } catch (ClientProtocolException e) { log.error("", e); return null; } catch (URISyntaxException e) { log.error("", e); return null; } catch (IOException e) { log.error("Error loading URI: " + (meth == null ? "???" : meth.getURI()), e); return null; } } }