io.undertow.server.handlers.ConfiguredPushHandler Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
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* Licensed 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,
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* See the License for the specific language governing permissions and
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package io.undertow.server.handlers;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.HeaderMap;
import io.undertow.util.HttpString;
import io.undertow.util.Methods;
import io.undertow.util.PathMatcher;
/**
* Handler that pushes resources based on a provided URL
*
* @author Stuart Douglas
*/
public class ConfiguredPushHandler implements HttpHandler {
private final PathMatcher pathMatcher = new PathMatcher<>();
private final HttpHandler next;
private final HeaderMap requestHeaders = new HeaderMap();
public ConfiguredPushHandler(HttpHandler next) {
this.next = next;
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
if(exchange.getConnection().isPushSupported()) {
PathMatcher.PathMatch result = pathMatcher.match(exchange.getRelativePath());
if(result != null) {
String[] value = result.getValue();
for(int i = 0; i < value.length; ++i) {
exchange.getConnection().pushResource(value[i], Methods.GET, requestHeaders);
}
}
}
next.handleRequest(exchange);
}
public ConfiguredPushHandler addRequestHeader(HttpString name, String value) {
requestHeaders.put(name, value);
return this;
}
public ConfiguredPushHandler addRoute(String url, String ... resourcesToPush) {
if(url.endsWith("/*")) {
String partial = url.substring(0, url.length() - 1);
pathMatcher.addPrefixPath(partial, resourcesToPush);
} else {
pathMatcher.addExactPath(url, resourcesToPush);
}
return this;
}
}