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/** * <a href="http://www.openolat.org"> * OpenOLAT - Online Learning and Training</a><br> * <p> * Licensed under the Apache License, Version 2.0 (the "License"); <br> * you may not use this file except in compliance with the License.<br> * You may obtain a copy of the License at the * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a> * <p> * Unless required by applicable law or agreed to in writing,<br> * software distributed under the License is distributed on an "AS IS" BASIS, <br> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br> * See the License for the specific language governing permissions and <br> * limitations under the License. * <p> * Initial code contributed and copyrighted by<br> * 12.10.2011 by frentix GmbH, http://www.frentix.com * <p> */package org.olat.restapi.support;import java.io.File;import java.io.IOException;import java.nio.file.Files;import java.util.HashMap;import java.util.Map;import java.util.UUID;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.Part;import org.apache.commons.io.IOUtils;import org.apache.logging.log4j.Logger;import org.olat.core.logging.Tracing;import org.olat.core.util.StringHelper;import org.olat.core.util.WebappHelper;/** * @author srosse, [email protected], http://www.frentix.com */public class MultipartReader { private static final Logger log = Tracing.createLoggerFor(MultipartReader.class); private String filename; private String contentType; private File file; private Map<String, String> fields = new HashMap<>(); public MultipartReader(HttpServletRequest request) { servlet31(request); } private final void servlet31(HttpServletRequest request) { try { for(Part part:request.getParts()) { if(part.getContentType() != null && (StringHelper.containsNonWhitespace(part.getSubmittedFileName()) || !part.getContentType().startsWith("text/plain"))) { contentType = part.getContentType(); filename = part.getSubmittedFileName(); // BUG: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') // if(filename != null) { // FIXED: if(filename != null && !filename.contains("..")) { filename = UUID.randomUUID().toString().replace("-", "") + "_" + filename; } else { filename = "upload-" + UUID.randomUUID().toString().replace("-", ""); } file = new File(WebappHelper.getTmpDir(), filename); part.write(file.getAbsolutePath()); file = new File(WebappHelper.getTmpDir(), filename); } else { String value = IOUtils.toString(part.getInputStream(), request.getCharacterEncoding()); fields.put(part.getName(), value); } try { part.delete(); } catch (Exception e) { //we try (tomcat doesn't send exception but undertow) } } } catch (IOException | ServletException e) { log.error("", e); } } public String getFilename() { return filename; } public String getContentType() { return contentType; } public String getText() { return fields.get("text"); } public String getValue(String key) { return fields.get(key); } public String getValue(String key, String defaultValue) { String value = fields.get(key); if(StringHelper.containsNonWhitespace(key)) { return value; } return defaultValue; } public Long getLongValue(String key) { String value = fields.get(key); if (value == null) { return null; } try { return Long.parseLong(value); } catch (NumberFormatException e) { return null; } } public Integer getIntegerValue(String key) { String value = fields.get(key); if (value == null) { return null; } try { return Integer.parseInt(value); } catch (NumberFormatException e) { return null; } } public File getFile() { return file; } public void close() { if (file != null) { try { Files.deleteIfExists(file.toPath()); } catch (IOException e) { log.error("", e); } } fields.clear(); } public static void closeQuietly(MultipartReader reader) { if(reader != null) { try { reader.close(); } catch (Exception e) { //quietly } } }} |