io.joshworks.snappy.handler.HttpRootHandler Maven / Gradle / Ivy
/*
* Copyright 2017 Josue Gontijo
*
* 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,
* 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 io.joshworks.snappy.handler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.RoutingHandler;
/**
* Created by Josh Gontijo on 3/17/17.
*/
public class HttpRootHandler extends RoutingHandler {
public HttpRootHandler(boolean rewriteQueryParameters) {
super(rewriteQueryParameters);
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
removeTrailingSlash(exchange);
super.handleRequest(exchange);
}
/**
*
* Handler that removes trailing slash from incoming requests in order to avoid null path parameters
* For example:
* For a given resource /users/{id}
* /users/ would match with the resource, passing in an null id
* Instead it would rewrite to
* /users causing a 404, thus avoiding null path parameter
*/
private void removeTrailingSlash(HttpServerExchange exchange) {
String trailingSlash = "/";
String requestPath = exchange.getRelativePath();
if (requestPath != null && !requestPath.isEmpty() && !requestPath.equals(trailingSlash)) {
requestPath = requestPath.endsWith(trailingSlash) ? requestPath.substring(0, requestPath.length() - 1) : requestPath;
exchange.setRelativePath(requestPath);
}
}
}