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/*
* Copyright (c) 2005, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package robaho.net.httpserver;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
class ContextList {
private final List<HttpContextImpl> list = new CopyOnWriteArrayList<>();
private final Map<CacheKey,HttpContextImpl> cache = new ConcurrentHashMap<>();
private record CacheKey(String protocol,String path){}
public synchronized void add(HttpContextImpl ctx) {
assert ctx.getPath() != null;
if (contains(ctx)) {
throw new IllegalArgumentException("cannot add context to list");
}
list.add(ctx);
}
boolean contains(HttpContextImpl ctx) {
return findContext(ctx.getProtocol(), ctx.getPath(), true) != null;
}
public int size() {
return list.size();
}
/*
* initially contexts are located only by protocol:path.
* Context with longest prefix matches (currently case-sensitive)
*/
HttpContextImpl findContext(String protocol, String path) {
CacheKey key = new CacheKey(protocol,path);
var ctx = cache.get(key);
if(ctx!=null) return ctx;
ctx = findContext(protocol, path, false);
// only cache exact matches, otherwise path parameters will
// explode memory
if(ctx!=null && ctx.getPath().equals(path)) {
cache.put(key,ctx);
}
return ctx;
}
HttpContextImpl findContext(String protocol, String path, boolean exact) {
String _protocol = protocol.toLowerCase(Locale.ROOT);
String longest = "";
HttpContextImpl lc = null;
for (HttpContextImpl ctx : list) {
if (!ctx.getProtocol().equals(_protocol)) {
continue;
}
String cpath = ctx.getPath();
if (exact && !cpath.equals(path)) {
continue;
} else if (!exact && !path.startsWith(cpath)) {
continue;
}
if (cpath.length() > longest.length()) {
longest = cpath;
lc = ctx;
}
}
return lc;
}
public synchronized void remove(String protocol, String path)
throws IllegalArgumentException {
HttpContextImpl ctx = findContext(protocol, path, true);
if (ctx == null) {
throw new IllegalArgumentException("cannot remove element from list");
}
list.remove(ctx);
}
public synchronized void remove(HttpContextImpl context)
throws IllegalArgumentException {
for (HttpContextImpl ctx : list) {
if (ctx.equals(context)) {
list.remove(ctx);
return;
}
}
throw new IllegalArgumentException("no such context in list");
}
}