org.apache.cxf.attachment.ContentDisposition Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cxf.attachment;
import java.io.UnsupportedEncodingException;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ContentDisposition {
private static final String CD_HEADER_PARAMS_EXPRESSION =
"[\\w-]++( )?\\*?=( )?((\"[^\"]++\")|([^;]+))";
private static final Pattern CD_HEADER_PARAMS_PATTERN =
Pattern.compile(CD_HEADER_PARAMS_EXPRESSION);
private static final String CD_HEADER_EXT_PARAMS_EXPRESSION =
"(?i)(UTF-8|ISO-8859-1)''((?:%[0-9a-f]{2}|\\S)+)";
private static final Pattern CD_HEADER_EXT_PARAMS_PATTERN =
Pattern.compile(CD_HEADER_EXT_PARAMS_EXPRESSION);
private static final Pattern CODEPOINT_ENCODED_VALUE_PATTERN = Pattern.compile("&#[0-9]{4};|\\S");
private static final String FILE_NAME = "filename";
private String value;
private String type;
private Map params = new LinkedHashMap<>();
public ContentDisposition(String value) {
this.value = value;
String tempValue = value;
int index = tempValue.indexOf(';');
if (index > 0 && tempValue.indexOf('=') >= index) {
type = tempValue.substring(0, index).trim();
tempValue = tempValue.substring(index + 1);
}
String extendedFilename = null;
Matcher m = CD_HEADER_PARAMS_PATTERN.matcher(tempValue);
while (m.find()) {
final String paramName;
String paramValue = "";
String groupValue = m.group().trim();
int eqIndex = groupValue.indexOf('=');
if (eqIndex > 0) {
paramName = groupValue.substring(0, eqIndex).trim();
if (eqIndex + 1 != groupValue.length()) {
paramValue = groupValue.substring(eqIndex + 1).trim().replace("\"", "");
}
} else {
paramName = groupValue;
}
// filename* looks like the only CD param that is human readable
// and worthy of the extended encoding support. Other parameters
// can be supported if needed, see the complete list below
/*
http://www.iana.org/assignments/cont-disp/cont-disp.xhtml#cont-disp-2
filename name to be used when creating file [RFC2183]
creation-date date when content was created [RFC2183]
modification-date date when content was last modified [RFC2183]
read-date date when content was last read [RFC2183]
size approximate size of content in octets [RFC2183]
name original field name in form [RFC2388]
voice type or use of audio content [RFC2421]
handling whether or not processing is required [RFC3204]
*/
if ("filename*".equalsIgnoreCase(paramName)) {
// try to decode the value if it matches the spec
try {
Matcher matcher = CD_HEADER_EXT_PARAMS_PATTERN.matcher(paramValue);
if (matcher.matches()) {
String encodingScheme = matcher.group(1);
String encodedValue = matcher.group(2);
paramValue = Rfc5987Util.decode(encodedValue, encodingScheme);
extendedFilename = paramValue;
}
} catch (UnsupportedEncodingException e) {
// would be odd not to support UTF-8 or 8859-1
}
} else if (FILE_NAME.equalsIgnoreCase(paramName) && paramValue.contains("&#")) {
Matcher matcher = CODEPOINT_ENCODED_VALUE_PATTERN.matcher(paramValue);
StringBuilder sb = new StringBuilder();
while (matcher.find()) {
String matched = matcher.group();
if (matched.startsWith("&#")) {
int codePoint = Integer.parseInt(matched.substring(2, 6));
sb.append(Character.toChars(codePoint));
} else {
sb.append(matched.charAt(0));
}
}
if (sb.length() > 0) {
paramValue = sb.toString();
}
}
params.put(paramName.toLowerCase(), paramValue);
}
if (extendedFilename != null) {
params.put(FILE_NAME, extendedFilename);
}
}
public String getType() {
return type;
}
public String getFilename() {
return params.get(FILE_NAME);
}
public String getParameter(String name) {
return params.get(name);
}
public Map getParameters() {
return Collections.unmodifiableMap(params);
}
public String toString() {
return value;
}
}