| /* |
| * 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. |
| */ |
| |
| package org.apache.ignite.rest.routes; |
| |
| import java.util.ArrayDeque; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.function.BiConsumer; |
| import io.netty.handler.codec.http.FullHttpRequest; |
| import io.netty.handler.codec.http.HttpHeaderNames; |
| import io.netty.handler.codec.http.HttpMethod; |
| import io.netty.handler.codec.http.HttpRequest; |
| import org.apache.ignite.rest.netty.RestApiHttpRequest; |
| import org.apache.ignite.rest.netty.RestApiHttpResponse; |
| |
| /** |
| * URI route with appropriate handler for request. |
| */ |
| public class Route { |
| /** Route. */ |
| private final String route; |
| |
| /** Method. */ |
| private final HttpMethod method; |
| |
| /** Accept type. */ |
| private final String acceptType; |
| |
| /** Handler. */ |
| private final BiConsumer<RestApiHttpRequest, RestApiHttpResponse> hnd; |
| |
| /** |
| * Create a new URI route with the given parameters. |
| * |
| * @param route Route. |
| * @param method Method. |
| * @param acceptType Accept type. |
| * @param hnd Request handler. |
| */ |
| public Route( |
| String route, |
| HttpMethod method, |
| String acceptType, |
| BiConsumer<RestApiHttpRequest, RestApiHttpResponse> hnd |
| ) { |
| this.route = route; |
| this.method = method; |
| this.acceptType = acceptType; |
| this.hnd = hnd; |
| } |
| |
| /** |
| * Handles the query by populating the received response object. |
| * |
| * @param req Request. |
| * @param resp Response. |
| */ |
| public void handle(FullHttpRequest req, RestApiHttpResponse resp) { |
| hnd.accept(new RestApiHttpRequest(req, paramsDecode(req.uri())), resp); |
| } |
| |
| /** |
| * Checks if the current route matches the request. |
| * |
| * @param req Request. |
| * @return true if route matches the request, else otherwise. |
| */ |
| public boolean match(HttpRequest req) { |
| return req.method().equals(method) && |
| matchUri(req.uri()) && |
| matchContentType(req.headers().get(HttpHeaderNames.CONTENT_TYPE)); |
| } |
| |
| /** |
| * Returns {@code true} if route matches the request, else otherwise. |
| * |
| * @param s Content type. |
| * @return {@code true} if route matches the request, else otherwise. |
| */ |
| private boolean matchContentType(String s) { |
| return (acceptType == null) || (acceptType.equals(s)); |
| } |
| |
| /** |
| * Checks the current route matches input uri. |
| * REST API like URIs "/user/:user" is also supported. |
| * |
| * @param uri Input URI |
| * @return true if route matches the request, else otherwise. |
| */ |
| private boolean matchUri(String uri) { |
| var receivedParts = new ArrayDeque<>(Arrays.asList(uri.split("/"))); |
| var realParts = new ArrayDeque<>(Arrays.asList(route.split("/"))); |
| |
| String part; |
| while ((part = realParts.pollFirst()) != null) { |
| String receivedPart = receivedParts.pollFirst(); |
| if (receivedPart == null) |
| return false; |
| |
| if (part.startsWith(":")) |
| continue; |
| |
| if (!part.equals(receivedPart)) |
| return false; |
| } |
| |
| return receivedParts.isEmpty(); |
| } |
| |
| /** |
| * Decodes params from REST like URIs "/user/:user". |
| * |
| * @param uri Input URI. |
| * @return Map of decoded params. |
| * @throws IllegalArgumentException if provided URI is incorrect. |
| */ |
| private Map<String, String> paramsDecode(String uri) { |
| var receivedParts = new ArrayDeque<>(Arrays.asList(uri.split("/"))); |
| var realParts = new ArrayDeque<>(Arrays.asList(route.split("/"))); |
| |
| Map<String, String> res = new HashMap<>(); |
| |
| String part; |
| while ((part = realParts.pollFirst()) != null) { |
| String receivedPart = receivedParts.pollFirst(); |
| if (receivedPart == null) |
| throw new IllegalArgumentException("URI is incorrect"); |
| |
| if (part.startsWith(":")) { |
| res.put(part.substring(1), receivedPart); |
| continue; |
| } |
| |
| if (!part.equals(receivedPart)) |
| throw new IllegalArgumentException("URI is incorrect"); |
| } |
| |
| return res; |
| } |
| } |