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/* |
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neon - Embeddable HTTP Server based on jdk.httpserver |
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Copyright (C) 2024 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.neon; |
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import com.sun.net.httpserver.HttpExchange; |
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import java.io.BufferedReader; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.InputStreamReader; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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/** |
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* Helfer fuer HTTP-Methoden |
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* |
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* @author Ulrich Hilger |
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* @version 1, 01.06.2021 |
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*/ |
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public class HttpHelper { |
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/* HTTP Methoden */ |
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public static final String HTTP_GET = "GET"; |
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public static final String HTTP_POST = "POST"; |
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public static final String HTTP_PUT = "PUT"; |
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public static final String HTTP_DELETE = "DELETE"; |
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public static final String STR_AMP = "&"; |
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public static final String STR_EQUAL = "="; |
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//public static final String CONTENT_TYPE = "Content-Type"; |
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public static final String CT_JSON = "application/json; charset=UTF-8"; |
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public static final String CT_TEXT_HTML = "text/html"; |
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/** |
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* Den Namen der gewünschten Datei aus der HTTP-Anfrage ermitteln |
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* |
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* @param e das Objekt mit Methoden zur Untersuchung der Anfrage sowie zum |
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* Anfertigen und Senden der Antwort |
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* @return Name der gewünschten Datei |
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* @throws IllegalArgumentException wenn der Dateiname ungueltige Zeichen |
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* enthaelt, z.B. ../ |
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*/ |
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public String getFileName(HttpExchange e) throws IllegalArgumentException { |
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String ctxPath = e.getHttpContext().getPath(); |
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String uriPath = e.getRequestURI().getPath(); |
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return fixFileName(uriPath.substring(ctxPath.length())); |
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} |
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public String fixFileName(String fileName) throws IllegalArgumentException { |
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if (fileName == null |
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|| fileName.contains("..") |
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|| fileName.contains("/") |
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|| fileName.contains("\\")) { |
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throw new IllegalArgumentException("Invalid file name"); |
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} |
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return fileName; |
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} |
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public String bodyLesen(HttpExchange exchange) throws IOException { |
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StringBuilder sb = new StringBuilder(); |
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InputStream is = exchange.getRequestBody(); |
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BufferedReader in = new BufferedReader(new InputStreamReader(is)); |
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String line = in.readLine(); |
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while (line != null) { |
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sb.append(line); |
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line = in.readLine(); |
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} |
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return sb.toString(); |
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} |
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public Map<String, String> getQueryMap(HttpExchange exchange) { |
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if(exchange.getRequestMethod().equalsIgnoreCase("GET")) { |
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return getQueryMap(exchange.getRequestURI().getQuery()); |
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} else { |
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try { |
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return getQueryMap(bodyLesen(exchange)); |
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} catch (IOException ex) { |
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return new HashMap<>(); |
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} |
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} |
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} |
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public Map<String, String> getQueryMap(String query) { |
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Map<String, String> map = new HashMap<>(); |
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try { |
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if(query instanceof String) { |
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String[] params = query.split(STR_AMP); |
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for (String param : params) { |
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String name = param.split(STR_EQUAL)[0]; |
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String value = param.split(STR_EQUAL)[1]; |
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map.put(name, value); |
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} |
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} else { |
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// map bleibt leer |
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} |
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} catch(Exception ex) { |
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} finally { |
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return map; |
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} |
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} |
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public String getRouteString(HttpExchange exchange) { |
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return getFileName(exchange); |
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} |
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public List<String> getRouteList(String routeString) { |
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return Arrays.asList(routeString.split("/")); |
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} |
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} |