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A simple but powerful web server framework
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
/*
NOTE: This file uses portions of code from the Jersey JAX-RS Spec:
https://github.com/jersey/jersey/blob/12e5d8bdf22bcd2676a1032ed69473cf2bbc48c7/core-common/src/main/java/org/glassfish/jersey/message/internal/CacheControlProvider.java
*/
package io.muserver.rest;
import io.muserver.ParameterizedHeader;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.ext.RuntimeDelegate;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
class CacheControlHeaderDelegate implements RuntimeDelegate.HeaderDelegate {
private static final Pattern WHITESPACE = Pattern.compile("\\s");
@Override
public CacheControl fromString(String value) {
ParameterizedHeader dir = ParameterizedHeader.fromString(value);
CacheControl cc = new CacheControl();
Map pams = new HashMap<>(dir.parameters());
cc.setProxyRevalidate(pams.containsKey("proxy-revalidate"));
pams.remove("proxy-revalidate");
cc.setMustRevalidate(pams.containsKey("must-revalidate"));
pams.remove("must-revalidate");
cc.setNoTransform(pams.containsKey("no-transform"));
pams.remove("no-transform");
cc.setNoStore(pams.containsKey("no-store"));
pams.remove("no-store");
cc.setNoCache(pams.containsKey("no-cache"));
pams.remove("no-cache");
cc.setPrivate(pams.containsKey("private"));
pams.remove("private");
if (pams.containsKey("max-age")) {
cc.setMaxAge(Integer.parseInt(pams.get("max-age")));
pams.remove("max-age");
}
if (pams.containsKey("s-maxage")) {
cc.setSMaxAge(Integer.parseInt(pams.get("s-maxage")));
pams.remove("s-maxage");
}
cc.getCacheExtension().putAll(pams);
return cc;
}
@Override
public String toString(CacheControl value) {
StringBuilder sb = new StringBuilder();
if (value.isPrivate()) {
appendQuotedWithSeparator(sb, "private", buildListValue(value.getPrivateFields()));
}
if (value.isNoCache()) {
appendQuotedWithSeparator(sb, "no-cache", buildListValue(value.getNoCacheFields()));
}
if (value.isNoStore()) {
appendWithSeparator(sb, "no-store");
}
if (value.isNoTransform()) {
appendWithSeparator(sb, "no-transform");
}
if (value.isMustRevalidate()) {
appendWithSeparator(sb, "must-revalidate");
}
if (value.isProxyRevalidate()) {
appendWithSeparator(sb, "proxy-revalidate");
}
if (value.getMaxAge() != -1) {
appendWithSeparator(sb, "max-age", value.getMaxAge());
}
if (value.getSMaxAge() != -1) {
appendWithSeparator(sb, "s-maxage", value.getSMaxAge());
}
for (Map.Entry e : value.getCacheExtension().entrySet()) {
String val = e.getValue();
appendWithSeparator(sb, e.getKey(), quoteIfWhitespace(val));
}
return sb.toString();
}
static String buildListValue(List values) {
StringBuilder b = new StringBuilder();
for (String value : values) {
appendWithSeparator(b, value);
}
return b.toString();
}
static void appendWithSeparator(StringBuilder b, String field) {
if (b.length() > 0) {
b.append(", ");
}
b.append(field);
}
static void appendQuotedWithSeparator(StringBuilder b, String field, String value) {
appendWithSeparator(b, field);
if (value != null && !value.isEmpty()) {
b.append("=\"");
b.append(value);
b.append("\"");
}
}
static void appendWithSeparator(StringBuilder b, String field, int value) {
appendWithSeparator(b, field);
b.append("=");
b.append(value);
}
static void appendWithSeparator(StringBuilder b, String field, String value) {
appendWithSeparator(b, field);
if (value != null && !value.isEmpty()) {
b.append("=");
b.append(value);
}
}
static String quoteIfWhitespace(String value) {
if (value == null) {
return null;
}
Matcher m = WHITESPACE.matcher(value);
if (m.find()) {
return "\"" + value + "\"";
}
return value;
}
}