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]+( )?\\*?=( )?\"[^\"]+\")|([\\w]+( )?\\*?=( )?[^;]+))";
private static final Pattern CD_HEADER_PARAMS_PATTERN =
Pattern.compile(CD_HEADER_PARAMS_EXPRESSION);
private static final String CD_HEADER_EXT_PARAMS_EXPRESSION =
"(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 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()) {
String[] pair = m.group().trim().split("=");
String paramName = pair[0].trim();
String paramValue = pair.length == 2 ? pair[1].trim().replace("\"", "") : "";
// 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*".equals(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
}
}
params.put(paramName, paramValue);
}
if (extendedFilename != null) {
params.put("filename", extendedFilename);
}
}
public String getType() {
return type;
}
public String getParameter(String name) {
return params.get(name);
}
public Map getParameters() {
return Collections.unmodifiableMap(params);
}
public String toString() {
return value;
}
}