/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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 org.springframework.http.server;

import java.net.URI;
import java.util.List;

import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;

Default implementation of RequestPath.
Author:Rossen Stoyanchev
Since:5.0
/** * Default implementation of {@link RequestPath}. * * @author Rossen Stoyanchev * @since 5.0 */
class DefaultRequestPath implements RequestPath { private final PathContainer fullPath; private final PathContainer contextPath; private final PathContainer pathWithinApplication; DefaultRequestPath(URI uri, @Nullable String contextPath) { this.fullPath = PathContainer.parsePath(uri.getRawPath()); this.contextPath = initContextPath(this.fullPath, contextPath); this.pathWithinApplication = extractPathWithinApplication(this.fullPath, this.contextPath); } private DefaultRequestPath(RequestPath requestPath, String contextPath) { this.fullPath = requestPath; this.contextPath = initContextPath(this.fullPath, contextPath); this.pathWithinApplication = extractPathWithinApplication(this.fullPath, this.contextPath); } private static PathContainer initContextPath(PathContainer path, @Nullable String contextPath) { if (!StringUtils.hasText(contextPath) || "/".equals(contextPath)) { return PathContainer.parsePath(""); } validateContextPath(path.value(), contextPath); int length = contextPath.length(); int counter = 0; for (int i=0; i < path.elements().size(); i++) { PathContainer.Element element = path.elements().get(i); counter += element.value().length(); if (length == counter) { return path.subPath(0, i + 1); } } // Should not happen.. throw new IllegalStateException("Failed to initialize contextPath '" + contextPath + "'" + " for requestPath '" + path.value() + "'"); } private static void validateContextPath(String fullPath, String contextPath) { int length = contextPath.length(); if (contextPath.charAt(0) != '/' || contextPath.charAt(length - 1) == '/') { throw new IllegalArgumentException("Invalid contextPath: '" + contextPath + "': " + "must start with '/' and not end with '/'"); } if (!fullPath.startsWith(contextPath)) { throw new IllegalArgumentException("Invalid contextPath '" + contextPath + "': " + "must match the start of requestPath: '" + fullPath + "'"); } if (fullPath.length() > length && fullPath.charAt(length) != '/') { throw new IllegalArgumentException("Invalid contextPath '" + contextPath + "': " + "must match to full path segments for requestPath: '" + fullPath + "'"); } } private static PathContainer extractPathWithinApplication(PathContainer fullPath, PathContainer contextPath) { return fullPath.subPath(contextPath.elements().size()); } // PathContainer methods.. @Override public String value() { return this.fullPath.value(); } @Override public List<Element> elements() { return this.fullPath.elements(); } // RequestPath methods.. @Override public PathContainer contextPath() { return this.contextPath; } @Override public PathContainer pathWithinApplication() { return this.pathWithinApplication; } @Override public RequestPath modifyContextPath(String contextPath) { return new DefaultRequestPath(this, contextPath); } @Override public boolean equals(@Nullable Object other) { if (this == other) { return true; } if (other == null || getClass() != other.getClass()) { return false; } DefaultRequestPath otherPath= (DefaultRequestPath) other; return (this.fullPath.equals(otherPath.fullPath) && this.contextPath.equals(otherPath.contextPath) && this.pathWithinApplication.equals(otherPath.pathWithinApplication)); } @Override public int hashCode() { int result = this.fullPath.hashCode(); result = 31 * result + this.contextPath.hashCode(); result = 31 * result + this.pathWithinApplication.hashCode(); return result; } @Override public String toString() { return this.fullPath.toString(); } }