| commit | author | age | ||
| 86bbf7 | 1 | /* |
| 94b1c2 | 2 | Tango - Personal Media Center |
| b56bb3 | 3 | Copyright (C) 2021 Ulrich Hilger |
| U | 4 | |
| 5 | This program is free software: you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU Affero General Public License as | |
| 7 | published by the Free Software Foundation, either version 3 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU Affero General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Affero General Public License | |
| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 86bbf7 | 17 | */ |
| 94b1c2 | 18 | package de.uhilger.tango.api; |
| 86bbf7 | 19 | |
| 095119 | 20 | import com.sun.net.httpserver.Headers; |
| 8d7d35 | 21 | import com.sun.net.httpserver.HttpExchange; |
| U | 22 | import com.sun.net.httpserver.HttpHandler; |
| f70acb | 23 | import de.uhilger.tango.App; |
| 8d7d35 | 24 | import java.io.BufferedReader; |
| U | 25 | import java.io.IOException; |
| 26 | import java.io.InputStream; | |
| 27 | import java.io.InputStreamReader; | |
| 28 | import java.io.OutputStream; | |
| f70acb | 29 | import java.util.ResourceBundle; |
| 8d7d35 | 30 | import java.util.logging.Logger; |
| U | 31 | |
| 86bbf7 | 32 | |
| U | 33 | /** |
| 34 | * | |
| b56bb3 | 35 | * @author Ulrich Hilger |
| U | 36 | * @version 1, 8.4.2021 |
| 86bbf7 | 37 | */ |
| 8d7d35 | 38 | public abstract class AbstractHandler extends JsonHelper implements HttpHandler { |
| 86bbf7 | 39 | |
| 8d7d35 | 40 | private static final Logger logger = Logger.getLogger(AbstractHandler.class.getName()); |
| U | 41 | |
| 42 | /** Name der HTTP Methode GET */ | |
| 43 | public static final String HTTP_GET = "GET"; | |
| 44 | ||
| 45 | /** Name der HTTP Methode PUT */ | |
| 46 | public static final String HTTP_PUT = "PUT"; | |
| 47 | ||
| 48 | /** Name der HTTP Methode POST */ | |
| 49 | public static final String HTTP_POST = "POST"; | |
| 50 | ||
| 51 | /** Name der HTTP Methode DELETE */ | |
| 52 | public static final String HTTP_DELETE = "DELETE"; | |
| 53 | ||
| 0e9cd3 | 54 | public static final int RTC_OK = 200; |
| U | 55 | public static final int RTC_NOT_FOUND = 404; |
| 56 | ||
| 57 | protected int returnCode; | |
| f70acb | 58 | |
| U | 59 | private ResourceBundle rb; |
| 0e9cd3 | 60 | |
| U | 61 | public AbstractHandler() { |
| 62 | this.returnCode = RTC_OK; | |
| 63 | } | |
| 64 | ||
| 8d7d35 | 65 | @Override |
| U | 66 | public void handle(HttpExchange e) throws IOException { |
| 67 | String method = e.getRequestMethod(); | |
| 68 | String response = ""; | |
| 69 | switch(method) { | |
| 70 | case HTTP_GET: | |
| 71 | String json = get(e); | |
| 72 | if(json != null) { | |
| 73 | response = json; | |
| 74 | } else { | |
| 75 | response = "nicht gefunden"; | |
| d027b5 | 76 | //returnCode = RTC_NOT_FOUND; |
| 8d7d35 | 77 | } |
| U | 78 | break; |
| 79 | ||
| 80 | case HTTP_PUT: | |
| 81 | response = put(e); | |
| 82 | break; | |
| 83 | ||
| 84 | case HTTP_POST: | |
| 85 | response = post(e); | |
| 86 | break; | |
| 87 | ||
| 88 | case HTTP_DELETE: | |
| 89 | boolean geloescht = delete(e); | |
| 90 | if(geloescht) { | |
| 91 | response = "geloescht"; | |
| 92 | } else { | |
| 93 | response = "nicht geloescht"; | |
| 94 | } | |
| 95 | break; | |
| 96 | } | |
| 78d707 | 97 | logger.fine(response); |
| 095119 | 98 | Headers headers = e.getResponseHeaders(); |
| U | 99 | headers.add("Content-Type", "application/json"); |
| 0e9cd3 | 100 | e.sendResponseHeaders(getReturnCode(), response.length()); |
| 8d7d35 | 101 | OutputStream os = e.getResponseBody(); |
| U | 102 | os.write(response.getBytes()); |
| 103 | os.close(); | |
| 0e9cd3 | 104 | } |
| U | 105 | |
| 106 | protected void setReturnCode(int code) { | |
| 107 | this.returnCode = code; | |
| 108 | } | |
| 109 | ||
| 110 | protected int getReturnCode() { | |
| 111 | return returnCode; | |
| 86bbf7 | 112 | } |
| U | 113 | |
| 8d7d35 | 114 | protected String bodyLesen(HttpExchange e) throws IOException { |
| U | 115 | InputStream is = e.getRequestBody(); |
| 116 | BufferedReader r = new BufferedReader(new InputStreamReader(is)); | |
| 86bbf7 | 117 | StringBuilder sb = new StringBuilder(); |
| 8d7d35 | 118 | String line = r.readLine(); |
| U | 119 | while(line != null) { |
| 120 | sb.append(line); | |
| 121 | line = r.readLine(); | |
| 122 | } | |
| 123 | r.close(); | |
| 124 | String json = sb.toString(); | |
| 125 | return json; | |
| 86bbf7 | 126 | } |
| 8d7d35 | 127 | |
| 0e9cd3 | 128 | protected String put(HttpExchange e) throws IOException { |
| U | 129 | setReturnCode(RTC_NOT_FOUND); |
| 130 | return "nicht unterstuetzt"; | |
| 131 | } | |
| 132 | ||
| 133 | protected String post(HttpExchange e) { | |
| 134 | setReturnCode(RTC_NOT_FOUND); | |
| 135 | return "nicht unterstuetzt"; | |
| 136 | } | |
| 137 | ||
| 138 | protected boolean delete(HttpExchange e) { | |
| 139 | setReturnCode(RTC_NOT_FOUND); | |
| 140 | return false; | |
| 141 | } | |
| 142 | ||
| 8d7d35 | 143 | |
| U | 144 | protected abstract String get(HttpExchange e); |
| 0e9cd3 | 145 | /* |
| 8d7d35 | 146 | protected abstract String put(HttpExchange e) throws IOException; |
| U | 147 | protected abstract String post(HttpExchange e); |
| 148 | protected abstract boolean delete(HttpExchange e); | |
| 0e9cd3 | 149 | */ |
| 86bbf7 | 150 | |
| f70acb | 151 | protected String getResString(String key) { |
| U | 152 | if(rb == null) { |
| 153 | rb = ResourceBundle.getBundle(App.RB_NAME); | |
| 154 | } | |
| 155 | return rb.getString(key); | |
| 156 | } | |
| 157 | ||
| 86bbf7 | 158 | } |
