org.unitedinternet.cosmo.dav.StandardResourceLocatorFactory.java Source code

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Here is the source code for org.unitedinternet.cosmo.dav.StandardResourceLocatorFactory.java

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/*
 * Copyright 2007 Open Source Applications Foundation
 * 
 * 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.unitedinternet.cosmo.dav;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.unitedinternet.cosmo.model.User;

/**
 * Standard implementation of {@link DavResourceLocatorFactory}.
 * Returns instances of {@link StandardResourceLocator}.
 *
 * @see DavResourceLocatorFactory
 */
public class StandardResourceLocatorFactory implements DavResourceLocatorFactory, ExtendedDavConstants {
    @SuppressWarnings("unused")
    private static final Log LOG = LogFactory.getLog(StandardResourceLocatorFactory.class);

    // DavResourceLocatorFactory methods

    public DavResourceLocator createResourceLocatorByPath(URL context, String path) {
        return new StandardResourceLocator(context, path, this);
    }

    public DavResourceLocator createResourceLocatorByUri(URL context, String raw) throws CosmoDavException {
        try {
            URI uri = new URI(raw);

            URL url = null;
            if (raw.startsWith("/")) {
                // absolute-path relative URL
                url = new URL(context, uri.getRawPath());
            } else {
                // absolute URL
                url = new URL(uri.getScheme(), uri.getHost(), uri.getPort(), uri.getRawPath());

                // make sure that absolute URLs use the same scheme and
                // authority (host:port)
                if (url.getProtocol() != null && !url.getProtocol().equals(context.getProtocol())) {
                    throw new BadRequestException("target " + uri + " does not specify same scheme " + "as context "
                            + context.toString());
                }

                // look at host
                if (url.getHost() != null && !url.getHost().equals(context.getHost())) {
                    throw new BadRequestException(
                            "target " + uri + " does not specify same host " + "as context " + context.toString());
                }

                // look at ports
                // take default ports 80 and 443 into account so that
                // https://server is the same as https://server:443
                int port1 = translatePort(context.getProtocol(), context.getPort());
                int port2 = translatePort(url.getProtocol(), url.getPort());

                if (port1 != port2) {
                    throw new BadRequestException(
                            "target " + uri + " does not specify same port " + "as context " + context.toString());
                }
            }

            if (!url.getPath().startsWith(context.getPath())) {
                throw new BadRequestException(uri + " does not specify correct dav path " + context.getPath());
            }

            // trim base path
            String path = url.getPath().substring(context.getPath().length()) + "/";
            path = path.replaceAll("/{2,}", "/");

            return new StandardResourceLocator(context, path, this);
        } catch (URISyntaxException | MalformedURLException e) {
            throw new BadRequestException("Invalid URL: " + e.getMessage());
        }
    }

    public DavResourceLocator createHomeLocator(URL context, User user) throws CosmoDavException {
        String path = TEMPLATE_HOME.bind(user.getUsername());
        return new StandardResourceLocator(context, path, this);
    }

    public DavResourceLocator createPrincipalLocator(URL context, User user) throws CosmoDavException {
        String path = TEMPLATE_USER.bind(user.getUsername());
        return new StandardResourceLocator(context, path, this);
    }

    private int translatePort(String protocol, int port) {
        if (port == -1 || port == 80 && "http".equals(protocol) || port == 443 && "https".equals(protocol)) {
            return -1;
        } else {
            return port;
        }
    }
}