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/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.protocol;
import ch.boye.httpclientandroidlib.HttpRequest;
import ch.boye.httpclientandroidlib.annotation.ThreadSafe;
import ch.boye.httpclientandroidlib.util.Args;
/**
* Maintains a map of HTTP request handlers keyed by a request URI pattern.
* <br>
* Patterns may have three formats:
* <ul>
* <li><code>*</code></li>
* <li><code>*<uri></code></li>
* <li><code><uri>*</code></li>
* </ul>
* <br>
* This class can be used to map an instance of
* {@link HttpRequestHandler} matching a particular request URI. Usually the
* mapped request handler will be used to process the request with the
* specified request URI.
*
* @since 4.3
*/
@ThreadSafe // provided injected dependencies are thread-safe
public class UriHttpRequestHandlerMapper implements HttpRequestHandlerMapper {
private final UriPatternMatcher<HttpRequestHandler> matcher;
protected UriHttpRequestHandlerMapper(final UriPatternMatcher<HttpRequestHandler> matcher) {
super();
this.matcher = Args.notNull(matcher, "Pattern matcher");
}
public UriHttpRequestHandlerMapper() {
this(new UriPatternMatcher<HttpRequestHandler>());
}
/**
* Registers the given {@link HttpRequestHandler} as a handler for URIs
* matching the given pattern.
*
* @param pattern the pattern to register the handler for.
* @param handler the handler.
*/
public void register(final String pattern, final HttpRequestHandler handler) {
Args.notNull(pattern, "Pattern");
Args.notNull(handler, "Handler");
matcher.register(pattern, handler);
}
/**
* Removes registered handler, if exists, for the given pattern.
*
* @param pattern the pattern to unregister the handler for.
*/
public void unregister(final String pattern) {
matcher.unregister(pattern);
}
/**
* Extracts request path from the given {@link HttpRequest}
*/
protected String getRequestPath(final HttpRequest request) {
String uriPath = request.getRequestLine().getUri();
int index = uriPath.indexOf("?");
if (index != -1) {
uriPath = uriPath.substring(0, index);
} else {
index = uriPath.indexOf("#");
if (index != -1) {
uriPath = uriPath.substring(0, index);
}
}
return uriPath;
}
/**
* Looks up a handler matching the given request URI.
*
* @param request the request
* @return handler or <code>null</code> if no match is found.
*/
public HttpRequestHandler lookup(final HttpRequest request) {
Args.notNull(request, "HTTP request");
return matcher.lookup(getRequestPath(request));
}
}
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