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/* |
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http-base - Extensions to jdk.httpserver |
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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.httpserver.base; |
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import com.sun.net.httpserver.HttpExchange; |
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import de.uhilger.httpserver.base.handler.FileHandler; |
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import java.io.BufferedReader; |
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import java.io.File; |
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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.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 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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*/ |
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public String getFileName(HttpExchange e) { |
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String ctxPath = e.getHttpContext().getPath(); |
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String uriPath = e.getRequestURI().getPath(); |
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return uriPath.substring(ctxPath.length()); |
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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 String getAttrStr(Map attributes, String key, String defaultValue) { |
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Object value = attributes.get(key); |
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if(value instanceof String) { |
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return value.toString(); |
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} else { |
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return defaultValue; |
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} |
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} |
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public File tryWelcomeFiles(HttpExchange e, String fName) { |
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boolean notFound = true; |
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File file = null; |
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String fileBase = e.getHttpContext().getAttributes().get(FileHandler.ATTR_FILE_BASE).toString(); |
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Object welcomeFiles = e.getHttpContext().getAttributes().get(FileHandler.ATTR_WELCOME_FILES); |
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if(welcomeFiles instanceof String) { |
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String[] fileNames = welcomeFiles.toString().split(FileHandler.STR_COMMA); |
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int i = -1; |
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while(notFound && ++i < fileNames.length) { |
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file = new File(fileBase, fName + fileNames[i]); |
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if(file.exists()) { |
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notFound = false; |
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} |
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} |
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} |
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if(notFound) { |
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file = new File(fileBase, fName + FileHandler.WELCOME_FILE); |
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} |
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return file; |
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} |
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} |