[3309] | 1 | package org.greenstone.gsdl3;
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| 2 |
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[11023] | 3 | import org.greenstone.gsdl3.comms.*;
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[3309] | 4 | import org.greenstone.gsdl3.core.*;
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| 5 | import org.greenstone.gsdl3.util.*;
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[3652] | 6 | import org.greenstone.gsdl3.action.PageAction; // used to get the default action
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[24753] | 7 | import org.greenstone.util.GlobalProperties;
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[3652] | 8 | import org.w3c.dom.Document;
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| 9 | import org.w3c.dom.Element;
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[16374] | 10 | import org.w3c.dom.Node;
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[4259] | 11 | import org.w3c.dom.NodeList;
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[3309] | 12 | import java.io.*;
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| 13 | import javax.servlet.*;
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| 14 | import javax.servlet.http.*;
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[3346] | 15 | import java.util.Enumeration;
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[14498] | 16 | import java.util.ArrayList;
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[4690] | 17 | import java.util.HashMap;
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[24753] | 18 | import java.util.Iterator;
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[24052] | 19 | import java.util.List;
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| 20 | import java.util.Map;
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[24753] | 21 | import java.util.Set;
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[3346] | 22 | import java.io.File;
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[24052] | 23 | import java.lang.reflect.Type;
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[14498] | 24 | import java.util.Hashtable;
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[13122] | 25 | import org.apache.log4j.*;
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| 26 |
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[24052] | 27 | import com.google.gson.Gson;
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| 28 | import com.google.gson.reflect.TypeToken;
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| 29 |
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[23790] | 30 | // Apache Commons
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[24753] | 31 | import org.apache.commons.fileupload.FileItem;
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| 32 | import org.apache.commons.fileupload.disk.DiskFileItemFactory;
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| 33 | import org.apache.commons.fileupload.servlet.ServletFileUpload;
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[23790] | 34 | import org.apache.commons.lang3.*;
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[14498] | 35 |
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[24753] | 36 | /**
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| 37 | * a servlet to serve the greenstone library - we are using servlets instead of
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| 38 | * cgi the init method is called only once - the first time the servlet classes
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| 39 | * are loaded. Each time a request comes in to the servlet, the session() method
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| 40 | * is called in a new thread (calls doGet/doPut etc) takes the a=p&p=home type
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| 41 | * args and builds a simple request to send to its receptionist, which returns a
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| 42 | * result in html, cos output=html is set in the request
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| 43 | *
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| 44 | * 18/Jul/07 xiao modify to make the cached parameters collection-specific. Most
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| 45 | * of the work is done in doGet(), except adding an inner class
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| 46 | * UserSessionCache.
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| 47 | *
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| 48 | * @see Receptionist
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| 49 | */
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| 50 | public class LibraryServlet extends HttpServlet
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| 51 | {
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[18223] | 52 |
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[24019] | 53 | /** the receptionist to send messages to */
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[24753] | 54 | protected Receptionist recept = null;
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[18223] | 55 |
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[24753] | 56 | /**
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| 57 | * the default language - is specified by setting a servlet param, otherwise
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| 58 | * DEFAULT_LANG is used
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| 59 | */
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| 60 | protected String default_lang = null;
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[18223] | 61 |
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[24019] | 62 | /** Whether or not client-side XSLT support should be exposed */
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| 63 | protected boolean supports_client_xslt = false;
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[18223] | 64 |
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[24753] | 65 | /**
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| 66 | * The default default - used if a default lang is not specified in the
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| 67 | * servlet params
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| 68 | */
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[24019] | 69 | protected final String DEFAULT_LANG = "en";
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[18223] | 70 |
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[24019] | 71 | /** container Document to create XML Nodes */
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[24753] | 72 | protected Document doc = null;
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[14498] | 73 |
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[24019] | 74 | /** a converter class to parse XML and create Docs */
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[24753] | 75 | protected XMLConverter converter = null;
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[6301] | 76 |
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[24753] | 77 | /**
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| 78 | * the cgi stuff - the Receptionist can add new args to this
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| 79 | *
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| 80 | * its used by the servlet to determine what args to save
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| 81 | */
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[24019] | 82 | protected GSParams params = null;
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[12021] | 83 |
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[24753] | 84 | /**
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| 85 | * user id - new one per session. This doesn't work if session state is
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| 86 | * saved between restarts - this requires this value to be saved too.
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| 87 | */
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[24019] | 88 | protected int next_user_id = 0;
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[18223] | 89 |
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[24753] | 90 | /**
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| 91 | * a hash that contains all the active session IDs mapped to the cached
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| 92 | * items It is updated whenever the whole site or a particular collection is
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| 93 | * reconfigured using the command a=s&sa=c or a=s&sa=c&c=xxx It is in the
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| 94 | * form: sid -> (UserSessionCache object)
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| 95 | */
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[24019] | 96 | protected Hashtable session_ids_table = new Hashtable();
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[18223] | 97 |
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[24753] | 98 | /**
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| 99 | * the maximum interval that the cached info remains in session_ids_table
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| 100 | * (in seconds) This is set in web.xml
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| 101 | */
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[24019] | 102 | protected int session_expiration = 1800;
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[13122] | 103 |
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[24019] | 104 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.LibraryServlet.class.getName());
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[18223] | 105 |
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[24753] | 106 | /** initialise the servlet */
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| 107 | public void init(ServletConfig config) throws ServletException
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| 108 | {
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[24019] | 109 | // always call super.init;
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| 110 | super.init(config);
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| 111 | // disable preferences - does this work anyway??
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| 112 | //System.setProperty("java.util.prefs.PreferencesFactory", "org.greenstone.gsdl3.util.DisabledPreferencesFactory");
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[24753] | 113 |
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[24019] | 114 | String library_name = config.getInitParameter(GSConstants.LIBRARY_NAME);
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| 115 | String gsdl3_home = config.getInitParameter(GSConstants.GSDL3_HOME);
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| 116 | String interface_name = config.getInitParameter(GSConstants.INTERFACE_NAME);
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[24753] | 117 |
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| 118 | String allowXslt = (String) config.getInitParameter(GSConstants.ALLOW_CLIENT_SIDE_XSLT);
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[24019] | 119 | supports_client_xslt = allowXslt != null && allowXslt.equals("true");
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[24753] | 120 |
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[24019] | 121 | this.default_lang = config.getInitParameter(GSConstants.DEFAULT_LANG);
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| 122 | String sess_expire = config.getInitParameter(GSXML.SESSION_EXPIRATION);
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[24753] | 123 |
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| 124 | if (sess_expire != null && !sess_expire.equals(""))
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| 125 | {
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[24019] | 126 | this.session_expiration = Integer.parseInt(sess_expire);
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| 127 | }
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[24753] | 128 |
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| 129 | if (library_name == null || interface_name == null)
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| 130 | {
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[24019] | 131 | // must have this
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| 132 | System.err.println("initialisation parameters not all set!");
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| 133 | System.err.println(" you must have libraryname and interfacename");
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| 134 | System.exit(1);
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| 135 | }
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[24753] | 136 |
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[24019] | 137 | String site_name = config.getInitParameter(GSConstants.SITE_NAME);
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| 138 | String remote_site_name = null;
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| 139 | String remote_site_type = null;
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| 140 | String remote_site_address = null;
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[24753] | 141 |
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| 142 | if (site_name == null)
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| 143 | {
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[24019] | 144 | // no site, try for communicator
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| 145 | remote_site_name = config.getInitParameter("remote_site_name");
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| 146 | remote_site_type = config.getInitParameter("remote_site_type");
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| 147 | remote_site_address = config.getInitParameter("remote_site_address");
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[24753] | 148 | if (remote_site_name == null || remote_site_type == null || remote_site_address == null)
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| 149 | {
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[24019] | 150 | System.err.println("initialisation paramters not all set!");
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| 151 | System.err.println("if site_name is not set, then you must have remote_site_name, remote_site_type and remote_site_address set");
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| 152 | System.exit(1);
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| 153 | }
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| 154 | }
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[24753] | 155 |
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| 156 | if (this.default_lang == null)
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| 157 | {
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[24019] | 158 | // choose english
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| 159 | this.default_lang = DEFAULT_LANG;
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| 160 | }
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[24753] | 161 |
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[24019] | 162 | HashMap config_params = new HashMap();
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[24753] | 163 |
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[24019] | 164 | config_params.put(GSConstants.LIBRARY_NAME, library_name);
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[24753] | 165 | config_params.put(GSConstants.INTERFACE_NAME, interface_name);
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[24019] | 166 | config_params.put(GSConstants.ALLOW_CLIENT_SIDE_XSLT, supports_client_xslt);
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[24753] | 167 |
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| 168 | if (site_name != null)
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| 169 | {
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[24019] | 170 | config_params.put(GSConstants.SITE_NAME, site_name);
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| 171 | }
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| 172 | this.converter = new XMLConverter();
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| 173 | this.doc = this.converter.newDOM();
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[24753] | 174 |
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[24019] | 175 | // the receptionist -the servlet will talk to this
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[24753] | 176 | String recept_name = (String) config.getInitParameter("receptionist_class");
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| 177 | if (recept_name == null)
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| 178 | {
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[24019] | 179 | this.recept = new DefaultReceptionist();
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[24753] | 180 | }
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| 181 | else
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| 182 | {
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| 183 | try
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| 184 | {
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| 185 | this.recept = (Receptionist) Class.forName("org.greenstone.gsdl3.core." + recept_name).newInstance();
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| 186 | }
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| 187 | catch (Exception e)
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| 188 | { // cant use this new one, so use normal one
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| 189 | System.err.println("LibraryServlet configure exception when trying to use a new Receptionist " + recept_name + ": " + e.getMessage());
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[24019] | 190 | e.printStackTrace();
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| 191 | this.recept = new DefaultReceptionist();
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| 192 | }
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| 193 | }
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| 194 | this.recept.setConfigParams(config_params);
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[24753] | 195 |
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[24019] | 196 | // the receptionist uses a MessageRouter or Communicator to send its requests to. We either create a MessageRouter here for the designated site (if site_name set), or we create a Communicator for a remote site. The is given to teh Receptionist, and the servlet never talks to it again.directly.
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[24753] | 197 | if (site_name != null)
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| 198 | {
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| 199 | String mr_name = (String) config.getInitParameter("messagerouter_class");
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[24019] | 200 | MessageRouter message_router = null;
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[24753] | 201 | if (mr_name == null)
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| 202 | { // just use the normal MR
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[24019] | 203 | message_router = new MessageRouter();
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[24753] | 204 | }
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| 205 | else
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| 206 | { // try the specified one
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| 207 | try
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| 208 | {
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| 209 | message_router = (MessageRouter) Class.forName("org.greenstone.gsdl3.core." + mr_name).newInstance();
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| 210 | }
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| 211 | catch (Exception e)
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| 212 | { // cant use this new one, so use normal one
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| 213 | System.err.println("LibraryServlet configure exception when trying to use a new MessageRouter " + mr_name + ": " + e.getMessage());
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[24019] | 214 | e.printStackTrace();
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| 215 | message_router = new MessageRouter();
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| 216 | }
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| 217 | }
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[24753] | 218 |
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[24019] | 219 | message_router.setSiteName(site_name);
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| 220 | message_router.setLibraryName(library_name);
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| 221 | message_router.configure();
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| 222 | this.recept.setMessageRouter(message_router);
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[24753] | 223 | }
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| 224 | else
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| 225 | {
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[24019] | 226 | // talking to a remote site, create a communicator
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| 227 | Communicator communicator = null;
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| 228 | // we need to create the XML to configure the communicator
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| 229 | Element site_elem = this.doc.createElement(GSXML.SITE_ELEM);
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| 230 | site_elem.setAttribute(GSXML.TYPE_ATT, remote_site_type);
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| 231 | site_elem.setAttribute(GSXML.NAME_ATT, remote_site_name);
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| 232 | site_elem.setAttribute(GSXML.ADDRESS_ATT, remote_site_address);
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[24753] | 233 |
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| 234 | if (remote_site_type.equals(GSXML.COMM_TYPE_SOAP_JAVA))
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| 235 | {
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[24019] | 236 | communicator = new SOAPCommunicator();
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[24753] | 237 | }
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| 238 | else
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| 239 | {
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| 240 | System.err.println("LibraryServlet.init Error: invalid Communicator type: " + remote_site_type);
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[24019] | 241 | System.exit(1);
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| 242 | }
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[24753] | 243 |
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| 244 | if (!communicator.configure(site_elem))
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| 245 | {
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[24019] | 246 | System.err.println("LibraryServlet.init Error: Couldn't configure communicator");
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| 247 | System.exit(1);
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| 248 | }
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| 249 | this.recept.setMessageRouter(communicator);
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| 250 | }
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[24753] | 251 |
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[24019] | 252 | // the params arg thingy
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[24753] | 253 |
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| 254 | String params_name = (String) config.getInitParameter("params_class");
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| 255 | if (params_name == null)
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| 256 | {
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[24019] | 257 | this.params = new GSParams();
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[24753] | 258 | }
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| 259 | else
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| 260 | {
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| 261 | try
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| 262 | {
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| 263 | this.params = (GSParams) Class.forName("org.greenstone.gsdl3.util." + params_name).newInstance();
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| 264 | }
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| 265 | catch (Exception e)
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| 266 | {
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| 267 | System.err.println("LibraryServlet configure exception when trying to use a new params thing " + params_name + ": " + e.getMessage());
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[24019] | 268 | e.printStackTrace();
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| 269 | this.params = new GSParams();
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| 270 | }
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| 271 | }
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| 272 | // pass it to the receptionist
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| 273 | this.recept.setParams(this.params);
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| 274 | this.recept.configure();
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[24753] | 275 |
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[24019] | 276 | }
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[18223] | 277 |
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[24753] | 278 | private void logUsageInfo(HttpServletRequest request)
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| 279 | {
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| 280 | String usageInfo = "";
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[14524] | 281 |
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[24019] | 282 | //session-info: get params stored in the session
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| 283 | HttpSession session = request.getSession(true);
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| 284 | Enumeration attributeNames = session.getAttributeNames();
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[24753] | 285 | while (attributeNames.hasMoreElements())
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| 286 | {
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| 287 | String name = (String) attributeNames.nextElement();
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| 288 | usageInfo += name + "=" + session.getAttribute(name) + " ";
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[24019] | 289 | }
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[24753] | 290 |
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[24019] | 291 | //logged info = general-info + session-info
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[24753] | 292 | usageInfo = request.getServletPath() + " " + //serlvet
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| 293 | "[" + request.getQueryString() + "]" + " " + //the query string
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| 294 | "[" + usageInfo.trim() + "]" + " " + // params stored in a session
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| 295 | request.getRemoteAddr() + " " + //remote address
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| 296 | request.getRequestedSessionId() + " " + //session id
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| 297 | request.getHeader("user-agent") + " "; //the remote brower info
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| 298 |
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[24019] | 299 | logger.info(usageInfo);
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[24753] | 300 |
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[24019] | 301 | }
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[23790] | 302 |
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[24753] | 303 | public class UserSessionCache implements HttpSessionBindingListener
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| 304 | {
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[23790] | 305 |
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[24019] | 306 | String session_id = "";
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[24753] | 307 |
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| 308 | /**
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| 309 | * a hash that maps the session ID to a hashtable that maps the
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| 310 | * coll_name to its parameters coll_name -> Hashtable (param_name ->
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| 311 | * param_value)
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| 312 | */
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[24019] | 313 | protected Hashtable coll_name_params_table = null;
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[24753] | 314 |
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| 315 | public UserSessionCache(String id, Hashtable table)
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| 316 | {
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| 317 | session_id = id;
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| 318 | coll_name_params_table = (table == null) ? new Hashtable() : table;
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[24019] | 319 | }
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[23790] | 320 |
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[24753] | 321 | protected void cleanupCache(String coll_name)
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| 322 | {
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| 323 | if (coll_name_params_table.containsKey(coll_name))
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| 324 | {
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[24019] | 325 | coll_name_params_table.remove(coll_name);
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| 326 | }
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| 327 | }
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| 328 |
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[24753] | 329 | protected Hashtable getParamsTable()
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| 330 | {
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[24019] | 331 | return coll_name_params_table;
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| 332 | }
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| 333 |
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[24753] | 334 | public void valueBound(HttpSessionBindingEvent event)
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| 335 | {
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[24019] | 336 | // Do nothing
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| 337 | }
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| 338 |
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[24753] | 339 | public void valueUnbound(HttpSessionBindingEvent event)
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| 340 | {
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| 341 | if (session_ids_table.containsKey(session_id))
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| 342 | {
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[24019] | 343 | session_ids_table.remove(session_id);
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| 344 | }
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| 345 | }
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| 346 |
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[24753] | 347 | public int tableSize()
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| 348 | {
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| 349 | return (coll_name_params_table == null) ? 0 : coll_name_params_table.size();
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[24019] | 350 | }
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| 351 |
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| 352 | }
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| 353 |
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[24753] | 354 | public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
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| 355 | {
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| 356 | logUsageInfo(request);
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[24019] | 357 |
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[24753] | 358 | String query_string;
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| 359 | if(request.getMethod().equals("GET"))
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| 360 | {
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| 361 | query_string = request.getQueryString();
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| 362 | }
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| 363 | else if(request.getMethod().equals("POST"))
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| 364 | {
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| 365 | query_string = "";
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| 366 | Map paramMap = request.getParameterMap();
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| 367 | Iterator keyIter = paramMap.keySet().iterator();
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| 368 |
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| 369 | while(keyIter.hasNext())
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| 370 | {
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| 371 | String current = (String)keyIter.next();
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| 372 | query_string += current + "=" + ((String[])paramMap.get(current))[0];
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| 373 | if(keyIter.hasNext())
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| 374 | {
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| 375 | query_string += "&";
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| 376 | }
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| 377 | }
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| 378 |
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| 379 | DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
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| 380 |
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| 381 | int sizeLimit = System.getProperties().containsKey("servlet.upload.filesize.limit") ? Integer.parseInt(System.getProperty("servlet.upload.filesize.limit")) : 20 * 1024 * 1024;
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| 382 |
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| 383 | fileItemFactory.setSizeThreshold(sizeLimit);
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| 384 | fileItemFactory.setRepository(new File(GlobalProperties.getGSDL3Home() + File.separator + "tmp"));
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| 385 |
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| 386 | ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory);
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| 387 |
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| 388 | try
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| 389 | {
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| 390 | List items = uploadHandler.parseRequest(request);
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| 391 | Iterator iter = items.iterator();
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| 392 | while(iter.hasNext())
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| 393 | {
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| 394 | FileItem current = (FileItem) iter.next();
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| 395 | if(current.isFormField())
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| 396 | {
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| 397 | query_string += current.getFieldName() + "=" + current.getString();
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| 398 | if(iter.hasNext())
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| 399 | {
|
---|
| 400 | query_string += "&";
|
---|
| 401 | }
|
---|
| 402 | }
|
---|
| 403 | else
|
---|
| 404 | {
|
---|
| 405 | File file = new File(GlobalProperties.getGSDL3Home() + File.separator + "tmp" + File.separator + current.getName());
|
---|
| 406 | current.write(file);
|
---|
| 407 | }
|
---|
| 408 | }
|
---|
| 409 | }
|
---|
| 410 | catch (Exception e)
|
---|
| 411 | {
|
---|
| 412 | logger.error("Exception in LibraryServlet -> " + e.getMessage());
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | if(query_string.equals(""))
|
---|
| 416 | {
|
---|
| 417 | query_string = null;
|
---|
| 418 | }
|
---|
| 419 | }
|
---|
| 420 | else
|
---|
| 421 | {
|
---|
| 422 | query_string = null;
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | if (query_string != null)
|
---|
| 426 | {
|
---|
[24019] | 427 | String[] query_arr = StringUtils.split(query_string, "&");
|
---|
| 428 | boolean redirect = false;
|
---|
| 429 | String href = null;
|
---|
| 430 | String rl = null;
|
---|
| 431 | String[] nameval = new String[2]; // Reuse it for memory efficiency purposes
|
---|
| 432 |
|
---|
[24753] | 433 | for (int i = 0; i < query_arr.length; i++)
|
---|
| 434 | {
|
---|
| 435 | if (query_arr[i].startsWith("el="))
|
---|
| 436 | {
|
---|
| 437 | if (query_arr[i].substring(query_arr[i].indexOf("=") + 1, query_arr[i].length()).equals("direct"))
|
---|
| 438 | {
|
---|
[24019] | 439 | redirect = true;
|
---|
| 440 | }
|
---|
[24753] | 441 | }
|
---|
| 442 | else if (query_arr[i].startsWith("href="))
|
---|
| 443 | {
|
---|
| 444 | href = query_arr[i].substring(query_arr[i].indexOf("=") + 1, query_arr[i].length());
|
---|
[24019] | 445 | href = StringUtils.replace(href, "%2f", "/");
|
---|
| 446 | href = StringUtils.replace(href, "%7e", "~");
|
---|
| 447 | href = StringUtils.replace(href, "%3f", "?");
|
---|
| 448 | href = StringUtils.replace(href, "%3A", "\\:");
|
---|
| 449 | }
|
---|
[24753] | 450 | else if (query_arr[i].startsWith("rl="))
|
---|
| 451 | {
|
---|
| 452 | rl = query_arr[i].substring(query_arr[i].indexOf("=") + 1, query_arr[i].length());
|
---|
| 453 | }
|
---|
[24019] | 454 | }
|
---|
| 455 |
|
---|
| 456 | //if query_string contains "el=", the web page will be redirected to the external URl, otherwise a greenstone page with an external URL will be displayed
|
---|
| 457 | //"rl=0" this is an external link
|
---|
| 458 | //"rl=1" this is an internal link
|
---|
[24753] | 459 | if ((redirect) && (href != null) && (rl.equals("0")))
|
---|
| 460 | {// This is an external link, the web page is re-directed to the external URL (&el=&rl=0&href="http://...")
|
---|
[24019] | 461 | response.setContentType("text/xml");
|
---|
| 462 | response.sendRedirect(href);
|
---|
| 463 | }
|
---|
| 464 | }
|
---|
[24753] | 465 |
|
---|
[24019] | 466 | // Nested Diagnostic Configurator to identify the client for
|
---|
[24753] | 467 | HttpSession session = request.getSession(true);
|
---|
[24019] | 468 | session.setMaxInactiveInterval(session_expiration);
|
---|
[24753] | 469 | String uid = (String) session.getAttribute(GSXML.USER_ID_ATT);
|
---|
| 470 | if (uid == null)
|
---|
| 471 | {
|
---|
| 472 | uid = "" + getNextUserId();
|
---|
| 473 | session.setAttribute(GSXML.USER_ID_ATT, uid);
|
---|
[24019] | 474 | }
|
---|
[24753] | 475 | request.setCharacterEncoding("UTF-8");
|
---|
| 476 | response.setContentType("text/html;charset=UTF-8");
|
---|
| 477 | PrintWriter out = response.getWriter();
|
---|
| 478 |
|
---|
| 479 | String lang = request.getParameter(GSParams.LANGUAGE);
|
---|
| 480 | if (lang == null || lang.equals(""))
|
---|
| 481 | {
|
---|
[24019] | 482 | // try the session cached lang
|
---|
[24753] | 483 | lang = (String) session.getAttribute(GSParams.LANGUAGE);
|
---|
| 484 | if (lang == null || lang.equals(""))
|
---|
| 485 | {
|
---|
[24019] | 486 | // still not set, use the default
|
---|
| 487 | lang = this.default_lang;
|
---|
| 488 | }
|
---|
| 489 | }
|
---|
[24753] | 490 |
|
---|
[24019] | 491 | // set the lang in the session
|
---|
[24753] | 492 | session.setAttribute(GSParams.LANGUAGE, lang);
|
---|
| 493 |
|
---|
| 494 | String output = request.getParameter(GSParams.OUTPUT);
|
---|
| 495 | if (output == null || output.equals(""))
|
---|
| 496 | {
|
---|
[24019] | 497 | output = "html"; // uses html by default
|
---|
| 498 | }
|
---|
[24753] | 499 |
|
---|
[24019] | 500 | // If server output, force a switch to traditional interface
|
---|
| 501 | //output = (output.equals("server")) ? "html" : output;
|
---|
[24753] | 502 |
|
---|
[24019] | 503 | // Force change the output mode if client-side XSLT is supported - server vs. client
|
---|
| 504 | // BUT only if the library allows client-side transforms
|
---|
[24753] | 505 | if (supports_client_xslt)
|
---|
| 506 | {
|
---|
[24019] | 507 | // MUST be done before the xml_message is built
|
---|
| 508 | Cookie[] cookies = request.getCookies();
|
---|
| 509 | Cookie xsltCookie = null;
|
---|
[24753] | 510 |
|
---|
[24019] | 511 | // The client has cookies enabled and a value set - use it!
|
---|
[24753] | 512 | if (cookies != null)
|
---|
| 513 | {
|
---|
| 514 | for (Cookie c : cookies)
|
---|
| 515 | {
|
---|
| 516 | if (c.getName().equals("supportsXSLT"))
|
---|
| 517 | {
|
---|
[24019] | 518 | xsltCookie = c;
|
---|
| 519 | break;
|
---|
| 520 | }
|
---|
[23790] | 521 | }
|
---|
[24019] | 522 | output = (xsltCookie != null && xsltCookie.getValue().equals("true") && output.equals("html")) ? "xsltclient" : output;
|
---|
[23790] | 523 | }
|
---|
| 524 | }
|
---|
[24753] | 525 |
|
---|
[24019] | 526 | // the request to the receptionist
|
---|
[24753] | 527 | Element xml_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
|
---|
| 528 | Element xml_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PAGE, "", lang, uid);
|
---|
| 529 | xml_request.setAttribute(GSXML.OUTPUT_ATT, output);
|
---|
| 530 |
|
---|
| 531 | xml_message.appendChild(xml_request);
|
---|
| 532 |
|
---|
| 533 | String action = request.getParameter(GSParams.ACTION);
|
---|
| 534 | String subaction = request.getParameter(GSParams.SUBACTION);
|
---|
[24019] | 535 | String collection = request.getParameter(GSParams.COLLECTION);
|
---|
| 536 | String service = request.getParameter(GSParams.SERVICE);
|
---|
[13122] | 537 |
|
---|
[24019] | 538 | // We clean up the cache session_ids_table if system
|
---|
| 539 | // commands are issued (and also don't need to do caching for this request)
|
---|
| 540 | boolean should_cache = true;
|
---|
[24753] | 541 | if (action != null && action.equals(GSParams.SYSTEM))
|
---|
| 542 | {
|
---|
[24019] | 543 | should_cache = false;
|
---|
[16938] | 544 |
|
---|
[24019] | 545 | // we may want to remove all collection cache info, or just a specific collection
|
---|
[24753] | 546 | boolean clean_all = true;
|
---|
[24019] | 547 | String clean_collection = null;
|
---|
| 548 | // system commands are to activate/deactivate stuff
|
---|
| 549 | // collection param is in the sc parameter.
|
---|
| 550 | // don't like the fact that it is hard coded here
|
---|
| 551 | String coll = request.getParameter(GSParams.SYSTEM_CLUSTER);
|
---|
[24753] | 552 | if (coll != null && !coll.equals(""))
|
---|
| 553 | {
|
---|
[24019] | 554 | clean_all = false;
|
---|
| 555 | clean_collection = coll;
|
---|
[24753] | 556 | }
|
---|
| 557 | else
|
---|
| 558 | {
|
---|
[24019] | 559 | // check other system types
|
---|
[24753] | 560 | if (subaction.equals("a") || subaction.equals("d"))
|
---|
| 561 | {
|
---|
[24019] | 562 | String module_name = request.getParameter("sn");
|
---|
[24753] | 563 | if (module_name != null && !module_name.equals(""))
|
---|
| 564 | {
|
---|
[24019] | 565 | clean_all = false;
|
---|
| 566 | clean_collection = module_name;
|
---|
| 567 | }
|
---|
| 568 | }
|
---|
| 569 | }
|
---|
[24753] | 570 | if (clean_all)
|
---|
| 571 | {
|
---|
| 572 | session_ids_table = new Hashtable();
|
---|
[24019] | 573 | session.removeAttribute(GSXML.USER_SESSION_CACHE_ATT);
|
---|
[24753] | 574 | }
|
---|
| 575 | else
|
---|
| 576 | {
|
---|
[24019] | 577 | // just clean up info for clean_collection
|
---|
| 578 | ArrayList cache_list = new ArrayList(session_ids_table.values());
|
---|
[24753] | 579 | for (int i = 0; i < cache_list.size(); i++)
|
---|
| 580 | {
|
---|
| 581 | UserSessionCache cache = (UserSessionCache) cache_list.get(i);
|
---|
[24019] | 582 | cache.cleanupCache(clean_collection);
|
---|
| 583 | }
|
---|
[24753] | 584 |
|
---|
[24019] | 585 | }
|
---|
[16938] | 586 |
|
---|
[24019] | 587 | }
|
---|
[24753] | 588 |
|
---|
[24019] | 589 | // cache_key is the collection name, or service name
|
---|
| 590 | String cache_key = collection;
|
---|
[24753] | 591 | if (cache_key == null || cache_key.equals(""))
|
---|
| 592 | {
|
---|
[24019] | 593 | cache_key = service;
|
---|
| 594 | }
|
---|
[24753] | 595 |
|
---|
[24019] | 596 | // logger.info("should_cache= " + should_cache);
|
---|
[16938] | 597 |
|
---|
[24019] | 598 | //clear the collection-specific cache in the session, since we have no way to know whether this session is
|
---|
| 599 | //about the same collection as the last session or not.
|
---|
| 600 | Enumeration attributeNames = session.getAttributeNames();
|
---|
[24753] | 601 | while (attributeNames.hasMoreElements())
|
---|
| 602 | {
|
---|
| 603 | String name = (String) attributeNames.nextElement();
|
---|
| 604 | if (!name.equals(GSXML.USER_SESSION_CACHE_ATT) && !name.equals(GSParams.LANGUAGE) && !name.equals(GSXML.USER_ID_ATT))
|
---|
| 605 | {
|
---|
[18223] | 606 |
|
---|
[24019] | 607 | session.removeAttribute(name);
|
---|
| 608 | }
|
---|
| 609 | }
|
---|
[24753] | 610 |
|
---|
[24019] | 611 | UserSessionCache session_cache = null;
|
---|
[24753] | 612 | Hashtable param_table = null;
|
---|
[24019] | 613 | Hashtable table = null;
|
---|
| 614 | String sid = session.getId();
|
---|
[24753] | 615 | if (should_cache == true && cache_key != null && !cache_key.equals(""))
|
---|
| 616 | {
|
---|
| 617 | if (session_ids_table.containsKey(sid))
|
---|
| 618 | {
|
---|
| 619 | session_cache = (UserSessionCache) session_ids_table.get(sid);
|
---|
[24019] | 620 | param_table = session_cache.getParamsTable();
|
---|
| 621 | logger.info("collections in table: " + tableToString(param_table));
|
---|
[24753] | 622 | if (param_table.containsKey(cache_key))
|
---|
| 623 | {
|
---|
[24019] | 624 | //logger.info("existing table: " + collection);
|
---|
[24753] | 625 | table = (Hashtable) param_table.get(cache_key);
|
---|
| 626 | }
|
---|
| 627 | else
|
---|
| 628 | {
|
---|
[24019] | 629 | table = new Hashtable();
|
---|
| 630 | param_table.put(cache_key, table);
|
---|
| 631 | //logger.info("new table: " + collection);
|
---|
| 632 | }
|
---|
[24753] | 633 | }
|
---|
| 634 | else
|
---|
| 635 | {
|
---|
[24019] | 636 | param_table = new Hashtable();
|
---|
| 637 | table = new Hashtable();
|
---|
| 638 | param_table.put(cache_key, table);
|
---|
| 639 | session_cache = new UserSessionCache(sid, param_table);
|
---|
| 640 | session_ids_table.put(sid, session_cache);
|
---|
| 641 | session.setAttribute(GSXML.USER_SESSION_CACHE_ATT, session_cache);
|
---|
| 642 | //logger.info("new session id");
|
---|
| 643 | }
|
---|
| 644 | }
|
---|
[6301] | 645 |
|
---|
[24753] | 646 | if (action == null || action.equals(""))
|
---|
| 647 | {
|
---|
[24019] | 648 | // should we do all the following stuff if using default page?
|
---|
| 649 | // display the home page - the default page
|
---|
[24753] | 650 | xml_request.setAttribute(GSXML.ACTION_ATT, "p");
|
---|
| 651 | xml_request.setAttribute(GSXML.SUBACTION_ATT, PageAction.HOME_PAGE);
|
---|
[24019] | 652 | }
|
---|
[24753] | 653 | else
|
---|
| 654 | {
|
---|
| 655 | xml_request.setAttribute(GSXML.ACTION_ATT, action);
|
---|
| 656 | if (subaction != null)
|
---|
| 657 | {
|
---|
| 658 | xml_request.setAttribute(GSXML.SUBACTION_ATT, subaction);
|
---|
[24019] | 659 | }
|
---|
[24753] | 660 |
|
---|
[24019] | 661 | // create the param list for the greenstone request - includes
|
---|
| 662 | // the params from the current request and any others from the saved session
|
---|
[24753] | 663 | Element xml_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
|
---|
| 664 | xml_request.appendChild(xml_param_list);
|
---|
| 665 |
|
---|
| 666 | Enumeration params = request.getParameterNames();
|
---|
| 667 | while (params.hasMoreElements())
|
---|
| 668 | {
|
---|
| 669 | String name = (String) params.nextElement();
|
---|
| 670 | if (!name.equals(GSParams.ACTION) && !name.equals(GSParams.SUBACTION) && !name.equals(GSParams.LANGUAGE) && !name.equals(GSParams.OUTPUT))
|
---|
| 671 | {// we have already dealt with these
|
---|
| 672 |
|
---|
| 673 | String value = "";
|
---|
| 674 | String[] values = request.getParameterValues(name);
|
---|
[24019] | 675 | value = values[0];
|
---|
[24753] | 676 | if (values.length > 1)
|
---|
| 677 | {
|
---|
| 678 | for (int i = 1; i < values.length; i++)
|
---|
| 679 | {
|
---|
| 680 | value += "," + values[i];
|
---|
[24019] | 681 | }
|
---|
| 682 | }
|
---|
| 683 | // either add it to the param list straight away, or save it to the session and add it later
|
---|
[24753] | 684 | if (this.params.shouldSave(name) && table != null)
|
---|
| 685 | {
|
---|
[24019] | 686 | table.put(name, value);
|
---|
| 687 | }
|
---|
[24753] | 688 | else
|
---|
| 689 | {
|
---|
| 690 | Element param = this.doc.createElement(GSXML.PARAM_ELEM);
|
---|
| 691 | param.setAttribute(GSXML.NAME_ATT, name);
|
---|
| 692 | param.setAttribute(GSXML.VALUE_ATT, GSXML.xmlSafe(value));
|
---|
| 693 | xml_param_list.appendChild(param);
|
---|
| 694 | }
|
---|
[24019] | 695 | }
|
---|
| 696 | }
|
---|
| 697 | //put everything in the table into the session
|
---|
| 698 | // do we need to do this? why not just put from table into param list
|
---|
[24753] | 699 | if (table != null)
|
---|
| 700 | {
|
---|
| 701 | Enumeration keys = table.keys();
|
---|
| 702 | while (keys.hasMoreElements())
|
---|
| 703 | {
|
---|
| 704 | String name = (String) keys.nextElement();
|
---|
| 705 | session.setAttribute(name, (String) table.get(name));
|
---|
[24019] | 706 | }
|
---|
| 707 | }
|
---|
[24753] | 708 |
|
---|
[24019] | 709 | // put in all the params from the session cache
|
---|
[24753] | 710 | params = session.getAttributeNames();
|
---|
| 711 | while (params.hasMoreElements())
|
---|
| 712 | {
|
---|
| 713 | String name = (String) params.nextElement();
|
---|
[18223] | 714 |
|
---|
[24753] | 715 | if (!name.equals(GSXML.USER_SESSION_CACHE_ATT) && !name.equals(GSParams.LANGUAGE) && !name.equals(GSXML.USER_ID_ATT))
|
---|
| 716 | {
|
---|
| 717 |
|
---|
[24019] | 718 | // lang and uid are stored but we dont want it in the param list cos its already in the request
|
---|
[24753] | 719 | Element param = this.doc.createElement(GSXML.PARAM_ELEM);
|
---|
| 720 | param.setAttribute(GSXML.NAME_ATT, name);
|
---|
| 721 | String value = GSXML.xmlSafe((String) session.getAttribute(name));
|
---|
[18223] | 722 |
|
---|
[24019] | 723 | // ugly hack to undo : escaping
|
---|
| 724 | value = StringUtils.replace(value, "%3A", "\\:");
|
---|
[24753] | 725 | param.setAttribute(GSXML.VALUE_ATT, value);
|
---|
| 726 | xml_param_list.appendChild(param);
|
---|
[24019] | 727 | }
|
---|
| 728 | }
|
---|
| 729 | }
|
---|
[24753] | 730 |
|
---|
| 731 | if (!output.equals("html") && !output.equals("server") && !output.equals("xsltclient"))
|
---|
| 732 | {
|
---|
| 733 | response.setContentType("text/xml"); // for now use text
|
---|
[24019] | 734 | }
|
---|
[24753] | 735 |
|
---|
[24019] | 736 | //Add custom HTTP headers if requested
|
---|
[24118] | 737 | String httpHeadersParam = request.getParameter(GSParams.HTTPHEADERFIELDS);
|
---|
| 738 | if (httpHeadersParam != null && httpHeadersParam.length() > 0)
|
---|
| 739 | {
|
---|
| 740 | Gson gson = new Gson();
|
---|
[24753] | 741 | Type type = new TypeToken<List<Map<String, String>>>()
|
---|
| 742 | {
|
---|
| 743 | }.getType();
|
---|
| 744 | List<Map<String, String>> httpHeaders = gson.fromJson(httpHeadersParam, type);
|
---|
| 745 | if (httpHeaders != null && httpHeaders.size() > 0)
|
---|
| 746 | {
|
---|
| 747 |
|
---|
| 748 | for (int j = 0; j < httpHeaders.size(); j++)
|
---|
[24019] | 749 | {
|
---|
[24753] | 750 | Map nameValueMap = (Map) httpHeaders.get(j);
|
---|
| 751 | String name = (String) nameValueMap.get("name");
|
---|
| 752 | String value = (String) nameValueMap.get("value");
|
---|
| 753 |
|
---|
| 754 | if (name != null && value != null)
|
---|
[24118] | 755 | {
|
---|
| 756 | response.setHeader(name, value);
|
---|
| 757 | }
|
---|
[24019] | 758 | }
|
---|
| 759 | }
|
---|
| 760 | }
|
---|
[24753] | 761 |
|
---|
[24019] | 762 | Node xml_result = this.recept.process(xml_message);
|
---|
[24753] | 763 | encodeURLs(xml_result, response);
|
---|
| 764 | out.println(this.converter.getPrettyString(xml_result));
|
---|
| 765 |
|
---|
[24019] | 766 | displaySize(session_ids_table);
|
---|
[16938] | 767 |
|
---|
[24019] | 768 | } //end of doGet(HttpServletRequest, HttpServletResponse)
|
---|
[18223] | 769 |
|
---|
[24019] | 770 | //a debugging method
|
---|
[24753] | 771 | private void displaySize(Hashtable table)
|
---|
| 772 | {
|
---|
| 773 | if (table == null)
|
---|
| 774 | {
|
---|
[24019] | 775 | logger.info("cached table is null");
|
---|
| 776 | return;
|
---|
| 777 | }
|
---|
[24753] | 778 | if (table.size() == 0)
|
---|
| 779 | {
|
---|
[24019] | 780 | logger.info("cached table size is zero");
|
---|
| 781 | return;
|
---|
| 782 | }
|
---|
| 783 | int num_cached_coll = 0;
|
---|
| 784 | ArrayList cache_list = new ArrayList(table.values());
|
---|
[24753] | 785 | for (int i = 0; i < cache_list.size(); i++)
|
---|
| 786 | {
|
---|
| 787 | num_cached_coll += ((UserSessionCache) cache_list.get(i)).tableSize();
|
---|
[24019] | 788 | }
|
---|
| 789 | logger.info("Number of sessions : total number of cached collection info = " + table.size() + " : " + num_cached_coll);
|
---|
| 790 | }
|
---|
[18223] | 791 |
|
---|
[24019] | 792 | /** merely a debugging method! */
|
---|
[24753] | 793 | private String tableToString(Hashtable table)
|
---|
| 794 | {
|
---|
[24019] | 795 | String str = "";
|
---|
[24753] | 796 | Enumeration keys = table.keys();
|
---|
| 797 | while (keys.hasMoreElements())
|
---|
| 798 | {
|
---|
| 799 | String name = (String) keys.nextElement();
|
---|
[24019] | 800 | str += name + ", ";
|
---|
| 801 | }
|
---|
| 802 | return str;
|
---|
| 803 | }
|
---|
[6301] | 804 |
|
---|
[24753] | 805 | /**
|
---|
| 806 | * this goes through each URL and adds in a session id if needed-- its
|
---|
| 807 | * needed if the browser doesn't accept cookies also escapes things if
|
---|
| 808 | * needed
|
---|
| 809 | */
|
---|
| 810 | protected void encodeURLs(Node dataNode, HttpServletResponse response)
|
---|
| 811 | {
|
---|
| 812 |
|
---|
| 813 | if (dataNode == null)
|
---|
| 814 | {
|
---|
[24019] | 815 | return;
|
---|
| 816 | }
|
---|
[16515] | 817 |
|
---|
[24753] | 818 | Element data = null;
|
---|
[16515] | 819 |
|
---|
[24019] | 820 | short nodeType = dataNode.getNodeType();
|
---|
[24753] | 821 | if (nodeType == Node.DOCUMENT_NODE)
|
---|
| 822 | {
|
---|
| 823 | Document docNode = (Document) dataNode;
|
---|
| 824 | data = docNode.getDocumentElement();
|
---|
[24019] | 825 | }
|
---|
[24753] | 826 | else
|
---|
| 827 | {
|
---|
| 828 | data = (Element) dataNode;
|
---|
[24019] | 829 | }
|
---|
[16515] | 830 |
|
---|
[24753] | 831 | if (data != null)
|
---|
| 832 | {
|
---|
[19984] | 833 |
|
---|
[24019] | 834 | // get all the <a> elements
|
---|
| 835 | NodeList hrefs = data.getElementsByTagName("a");
|
---|
| 836 | // Instead of calculating each iteration...
|
---|
| 837 | int hrefscount = hrefs.getLength();
|
---|
[23790] | 838 |
|
---|
[24753] | 839 | for (int i = 0; hrefs != null && i < hrefscount; i++)
|
---|
| 840 | {
|
---|
| 841 | Element a = (Element) hrefs.item(i);
|
---|
[24019] | 842 | // ugly hack to get rid of : in the args - interferes with session handling
|
---|
| 843 | String href = a.getAttribute("href");
|
---|
[24753] | 844 | if (!href.equals(""))
|
---|
| 845 | {
|
---|
| 846 | if (href.indexOf("?") != -1)
|
---|
| 847 | {
|
---|
[24019] | 848 | String[] parts = StringUtils.split(href, "\\?", -1);
|
---|
| 849 | if (parts.length == 1)
|
---|
| 850 | {
|
---|
| 851 | parts[0] = StringUtils.replace(parts[0], ":", "%3A");
|
---|
[24753] | 852 | href = "?" + parts[0];
|
---|
[24019] | 853 | }
|
---|
| 854 | else
|
---|
| 855 | {
|
---|
| 856 | parts[1] = StringUtils.replace(parts[1], ":", "%3A");
|
---|
[24753] | 857 | href = parts[0] + "?" + parts[1];
|
---|
[24019] | 858 | }
|
---|
[24753] | 859 |
|
---|
[24019] | 860 | }
|
---|
| 861 | a.setAttribute("href", response.encodeURL(href));
|
---|
| 862 | }
|
---|
| 863 | }
|
---|
[24753] | 864 |
|
---|
[24019] | 865 | // now find any submit bits - get all the <form> elements
|
---|
| 866 | NodeList forms = data.getElementsByTagName("form");
|
---|
| 867 | int formscount = forms.getLength();
|
---|
[24753] | 868 | for (int i = 0; forms != null && i < formscount; i++)
|
---|
| 869 | {
|
---|
| 870 | Element form = (Element) forms.item(i);
|
---|
[24019] | 871 | form.setAttribute("action", response.encodeURL(form.getAttribute("action")));
|
---|
| 872 | }
|
---|
| 873 | // are these the only cases where URLs occur??
|
---|
| 874 | // we should only do this for greenstone urls?
|
---|
[19984] | 875 | }
|
---|
[24753] | 876 |
|
---|
[19984] | 877 | }
|
---|
[18223] | 878 |
|
---|
[24753] | 879 | synchronized protected int getNextUserId()
|
---|
| 880 | {
|
---|
[24019] | 881 | next_user_id++;
|
---|
| 882 | return next_user_id;
|
---|
| 883 | }
|
---|
[18223] | 884 |
|
---|
[24753] | 885 | public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
|
---|
| 886 | {
|
---|
| 887 | doGet(request, response);
|
---|
[24019] | 888 | }
|
---|
[3309] | 889 | }
|
---|