| 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; |
| 23 | import java.io.BufferedReader; | |
| 24 | import java.io.IOException; | |
| 25 | import java.io.InputStream; | |
| 26 | import java.io.InputStreamReader; | |
| 27 | import java.io.OutputStream; | |
| 28 | import java.util.logging.Logger; | |
| 29 | ||
| 86bbf7 | 30 | |
| U | 31 | /** |
| 32 | * | |
| b56bb3 | 33 | * @author Ulrich Hilger |
| U | 34 | * @version 1, 8.4.2021 |
| 86bbf7 | 35 | */ |
| 8d7d35 | 36 | public abstract class AbstractHandler extends JsonHelper implements HttpHandler { |
| 86bbf7 | 37 | |
| 8d7d35 | 38 | private static final Logger logger = Logger.getLogger(AbstractHandler.class.getName()); |
| U | 39 | |
| 40 | /** Name der HTTP Methode GET */ | |
| 41 | public static final String HTTP_GET = "GET"; | |
| 42 | ||
| 43 | /** Name der HTTP Methode PUT */ | |
| 44 | public static final String HTTP_PUT = "PUT"; | |
| 45 | ||
| 46 | /** Name der HTTP Methode POST */ | |
| 47 | public static final String HTTP_POST = "POST"; | |
| 48 | ||
| 49 | /** Name der HTTP Methode DELETE */ | |
| 50 | public static final String HTTP_DELETE = "DELETE"; | |
| 51 | ||
| 0e9cd3 | 52 | public static final int RTC_OK = 200; |
| U | 53 | public static final int RTC_NOT_FOUND = 404; |
| 54 | ||
| 55 | protected int returnCode; | |
| 56 | ||
| 57 | public AbstractHandler() { | |
| 58 | this.returnCode = RTC_OK; | |
| 59 | } | |
| 60 | ||
| 8d7d35 | 61 | @Override |
| U | 62 | public void handle(HttpExchange e) throws IOException { |
| 63 | String method = e.getRequestMethod(); | |
| 64 | String response = ""; | |
| 65 | switch(method) { | |
| 66 | case HTTP_GET: | |
| 67 | String json = get(e); | |
| 68 | if(json != null) { | |
| 69 | response = json; | |
| 70 | } else { | |
| 71 | response = "nicht gefunden"; | |
| d027b5 | 72 | //returnCode = RTC_NOT_FOUND; |
| 8d7d35 | 73 | } |
| U | 74 | break; |
| 75 | ||
| 76 | case HTTP_PUT: | |
| 77 | response = put(e); | |
| 78 | break; | |
| 79 | ||
| 80 | case HTTP_POST: | |
| 81 | response = post(e); | |
| 82 | break; | |
| 83 | ||
| 84 | case HTTP_DELETE: | |
| 85 | boolean geloescht = delete(e); | |
| 86 | if(geloescht) { | |
| 87 | response = "geloescht"; | |
| 88 | } else { | |
| 89 | response = "nicht geloescht"; | |
| 90 | } | |
| 91 | break; | |
| 92 | } | |
| 78d707 | 93 | logger.fine(response); |
| 095119 | 94 | Headers headers = e.getResponseHeaders(); |
| U | 95 | headers.add("Content-Type", "application/json"); |
| 0e9cd3 | 96 | e.sendResponseHeaders(getReturnCode(), response.length()); |
| 8d7d35 | 97 | OutputStream os = e.getResponseBody(); |
| U | 98 | os.write(response.getBytes()); |
| 99 | os.close(); | |
| 0e9cd3 | 100 | } |
| U | 101 | |
| 102 | protected void setReturnCode(int code) { | |
| 103 | this.returnCode = code; | |
| 104 | } | |
| 105 | ||
| 106 | protected int getReturnCode() { | |
| 107 | return returnCode; | |
| 86bbf7 | 108 | } |
| U | 109 | |
| 8d7d35 | 110 | protected String bodyLesen(HttpExchange e) throws IOException { |
| U | 111 | InputStream is = e.getRequestBody(); |
| 112 | BufferedReader r = new BufferedReader(new InputStreamReader(is)); | |
| 86bbf7 | 113 | StringBuilder sb = new StringBuilder(); |
| 8d7d35 | 114 | String line = r.readLine(); |
| U | 115 | while(line != null) { |
| 116 | sb.append(line); | |
| 117 | line = r.readLine(); | |
| 118 | } | |
| 119 | r.close(); | |
| 120 | String json = sb.toString(); | |
| 121 | return json; | |
| 86bbf7 | 122 | } |
| 8d7d35 | 123 | |
| 0e9cd3 | 124 | protected String put(HttpExchange e) throws IOException { |
| U | 125 | setReturnCode(RTC_NOT_FOUND); |
| 126 | return "nicht unterstuetzt"; | |
| 127 | } | |
| 128 | ||
| 129 | protected String post(HttpExchange e) { | |
| 130 | setReturnCode(RTC_NOT_FOUND); | |
| 131 | return "nicht unterstuetzt"; | |
| 132 | } | |
| 133 | ||
| 134 | protected boolean delete(HttpExchange e) { | |
| 135 | setReturnCode(RTC_NOT_FOUND); | |
| 136 | return false; | |
| 137 | } | |
| 138 | ||
| 8d7d35 | 139 | |
| U | 140 | protected abstract String get(HttpExchange e); |
| 0e9cd3 | 141 | /* |
| 8d7d35 | 142 | protected abstract String put(HttpExchange e) throws IOException; |
| U | 143 | protected abstract String post(HttpExchange e); |
| 144 | protected abstract boolean delete(HttpExchange e); | |
| 0e9cd3 | 145 | */ |
| 86bbf7 | 146 | |
| U | 147 | } |
