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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
}
}
}
} |