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/* |
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Mediazentrale - Personal Media Center |
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Copyright (C) 2021 Ulrich Hilger |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Affero General Public License as |
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published by the Free Software Foundation, either version 3 of the |
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License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Affero General Public License for more details. |
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You should have received a copy of the GNU Affero General Public License |
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along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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package de.uhilger.mediaz.api; |
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import com.google.gson.Gson; |
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import com.sun.net.httpserver.HttpExchange; |
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import de.uhilger.mediaz.App; |
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import de.uhilger.mediaz.Server; |
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import de.uhilger.mediaz.entity.Abspielliste; |
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import de.uhilger.mediaz.entity.Entity; |
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import de.uhilger.mediaz.entity.Titel; |
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import de.uhilger.mediaz.store.FileStorage; |
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import java.io.IOException; |
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import java.util.logging.Logger; |
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/** |
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* Der ListHandler bearbeitet HTTP-Anfragen zu Abspiellisten |
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* |
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* GET /mz/api/alist/[pl-name] die Titel-Objekte der Liste [pl-name] liefern |
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* PUT /mz/api/alist/[pl-name] den Titel im Body anfuegen an die Liste [pl-name] |
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* PUT /mz/api/alist/[pl-name]/[nr] an der Position nr der Liste [pl-name] den Titel im Body einfuegen |
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* DELETE /mz/api/alist/[pl-name]/[nr] den Titel an der Position [nr] aus der Liste [pl-name] entfernen |
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* DELETE /mz/api/alist/[pl-name]/alle alle Titel aus der Liste [pl-name] entfernen |
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* |
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* @author Ulrich Hilger |
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* @version 1, 8.4.2021 |
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*/ |
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public class ListHandler extends AbstractHandler { |
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private static final Logger logger = Logger.getLogger(ListHandler.class.getName()); |
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public static final String ALLE_TITEL = "alle"; |
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@Override |
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protected String get(HttpExchange e) { |
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String path = e.getRequestURI().toString(); |
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String[] elems = path.split(Server.SLASH); |
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String plname = elems[elems.length - 1]; |
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FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF))); |
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String json = fs.readJson(FileStorage.ST_ABSPIELLISTE, plname); |
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return embedInCustomType(json, FileStorage.ST_ABSPIELLISTE); |
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} |
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@Override |
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protected String put(HttpExchange e) throws IOException { |
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String path = e.getRequestURI().toString(); |
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String[] elems = path.split(Server.SLASH); |
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String response = "ListHandler.put: ungueltiger URL"; |
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switch(elems.length) { |
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case 5: // ohne nr am Ende |
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response = addTitel(e, elems[4]); |
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break; |
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case 6: |
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response = "Einfuegen noch nicht fertig."; |
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break; |
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} |
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return response; |
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} |
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private String addTitel(HttpExchange e, String plname) throws IOException { |
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FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF))); |
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Entity entity = fs.read(FileStorage.ST_ABSPIELLISTE, plname); |
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String response = "Titel konnte nicht hinzugefuegt werden."; |
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if(entity instanceof Abspielliste) { |
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Abspielliste aliste = (Abspielliste) entity; |
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String titelJson = bodyLesen(e); |
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Gson gson = new Gson(); |
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Object o = gson.fromJson(titelJson, fs.typeFromName(Titel.class.getSimpleName()).getType()); |
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if(o instanceof Titel) { |
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Titel titel = (Titel) o; |
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aliste.addTitel(titel); |
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fs.write(aliste, true); |
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response = "Titel " + titel.getName() + " der Liste " + aliste.getName() + " hinzugefuegt."; |
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} |
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} |
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return response; |
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} |
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@Override |
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protected String post(HttpExchange e) { |
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throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
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} |
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// DELETE /mz/api/alist/[pl-name]/[nr] den Titel an der Position [nr] aus der Liste [pl-name] entfernen |
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@Override |
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protected boolean delete(HttpExchange e) { |
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String path = e.getRequestURI().toString(); |
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String[] elems = path.split(Server.SLASH); |
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String listName = elems[elems.length - 2]; |
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FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF))); |
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Entity entity = fs.read(Abspielliste.class.getSimpleName(), listName); |
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if(entity instanceof Abspielliste) { |
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Abspielliste liste = (Abspielliste) entity; |
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String titelStr = elems[elems.length-1]; |
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if(titelStr.equalsIgnoreCase(ALLE_TITEL)) { |
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liste.getTitel().clear(); |
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} else { |
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liste.getTitel().remove(Integer.parseInt(elems[elems.length-1])); |
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} |
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fs.write(liste, true); |
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return true; |
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} else { |
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return false; |
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} |
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} |
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} |