/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * http://glassfish.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. 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However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package com.sun.jersey.api.container.filter; import com.sun.jersey.spi.container.ContainerRequest; import com.sun.jersey.spi.container.ContainerRequestFilter; import java.util.Collections; import java.util.List; import java.util.Map; import javax.ws.rs.core.MediaType; import javax.ws.rs.core.PathSegment; /** * A URI-based content negotiation filter mapping a dot-declared suffix in * URI to media type that is the value of the <code>Accept</code> header * or a language that is the value of the <code>Accept-Language</code> header. * <p> * This filter may be used when the accetable media type and acceptable * language need to be declared in the URI. * <p> * This class may be extended to declare the mappings and the extending class, * <code>foo.MyUriConnegFilter</code> say, can be registered as a container request * filter. When an application is deployed as a Servlet or Filter such a filter * can be registered using the following initialization parameters: * <blockquote><pre> * <init-param> * <param-name>com.sun.jersey.spi.container.ContainerRequestFilters</param-name> * <param-value>foo.MyUriConnegFilter</param-value> * </init-param> * </pre></blockquote> * <p> * If a suffix of "atom" is regstered with a media type of * "application/atom+xml" then a GET request of: * <pre>GET /resource.atom</pre> * <p>is transformed to:</p> * <pre>GET /resource *Accept: application/atom+xml</pre> * Any existing "Accept" header value will be replaced. * <p> * If a suffix of "english: is regstered with a language of * "en" then a GET request of: * <pre>GET /resource.english</pre> * <p>is transformed to:</p> * <pre>GET /resource *Accept-Language: en</pre> * Any existing "Accept-Language"header value will be replaced. * <p> * The media type mappings are processed before the language type mappings. * * @author Paul.Sandoz@Sun.Com * @see com.sun.jersey.api.container.filter */ public class UriConnegFilter implements ContainerRequestFilter { private final Map<String, MediaType> mediaExtentions; private final Map<String, String> languageExtentions; /** * Create a filter with suffix to media type mappings. * * @param mediaExtentions the suffix to media type mappings. */ public UriConnegFilter(Map<String, MediaType> mediaExtentions) { if (mediaExtentions == null) throw new IllegalArgumentException(); this.mediaExtentions = mediaExtentions; this.languageExtentions = Collections.emptyMap(); } /** * Create a filter with suffix to media type mappings and suffix to * langauge mappings. * * @param mediaExtentions the suffix to media type mappings. * @param languageExtentions the syffix to language mappings. */ public UriConnegFilter(Map<String, MediaType> mediaExtentions, Map<String, String> languageExtentions) { if (mediaExtentions == null) throw new IllegalArgumentException(); if (languageExtentions == null) throw new IllegalArgumentException(); this.mediaExtentions = mediaExtentions; this.languageExtentions = languageExtentions; } public ContainerRequest filter(ContainerRequest request) { // Quick check for a '.' character String path = request.getRequestUri().getRawPath(); if (path.indexOf('.') == -1) return request; List<PathSegment> l = request.getPathSegments(false); if (l.isEmpty()) return request; // Get the last non-empty path segment PathSegment segment = null; for (int i = l.size() - 1; i >= 0; i--) { segment = l.get(i); if (segment.getPath().length() > 0) break; } if (segment == null) return request; final int length = path.length(); // Get the suffixes final String[] suffixes = segment.getPath().split("\\."); for (int i = suffixes.length - 1; i >= 1; i--) { final String suffix = suffixes[i]; if (suffix.length() == 0) continue; final MediaType accept = mediaExtentions.get(suffix); if (accept != null) { request.getRequestHeaders().putSingle("Accept", accept.toString()); final int index = path.lastIndexOf('.' + suffix); path = new StringBuilder(path).delete(index, index + suffix.length() + 1).toString(); suffixes[i] = ""; break; } } for (int i = suffixes.length - 1; i >= 1; i--) { final String suffix = suffixes[i]; if (suffix.length() == 0) continue; final String acceptLanguage = languageExtentions.get(suffix); if (acceptLanguage != null) { request.getRequestHeaders().putSingle("Accept-Language", acceptLanguage); final int index = path.lastIndexOf('.' + suffix); path = new StringBuilder(path).delete(index, index + suffix.length() + 1).toString(); suffixes[i] = ""; break; } } if (length != path.length()) { request.setUris( request.getBaseUri(), request.getRequestUriBuilder().replacePath(path).build()); } return request; } }