org.silverpeas.core.contribution.attachment.util.SharingContext.java Source code

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Here is the source code for org.silverpeas.core.contribution.attachment.util.SharingContext.java

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/*
 * Copyright (C) 2000 - 2016 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception.  You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.silverpeas.core.contribution.attachment.util;

import org.apache.commons.lang3.CharEncoding;
import org.silverpeas.core.contribution.attachment.model.SimpleDocument;
import org.silverpeas.core.util.ArrayUtil;
import org.silverpeas.core.util.StringUtil;
import org.silverpeas.core.util.logging.SilverLogger;

import java.net.URI;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SharingContext {

    private static Pattern REGEXPR_SHARED_ATTACHMENT = Pattern.compile("(?i)src=\"(.+/attachmentId/[^\"]+)");

    private String baseURI;
    private String token;

    public SharingContext(String baseURI, String token) {
        this.baseURI = baseURI;
        this.token = token;
    }

    public String getBaseURI() {
        return baseURI;
    }

    public void setBaseURI(String baseURI) {
        this.baseURI = baseURI;
    }

    public String getToken() {
        return token;
    }

    public void setToken(String token) {
        this.token = token;
    }

    /**
     * This method reads a text content in order to identify all attachment URIs and to transform
     * them into shared attachment URIs.
     * @param text the text content to modify
     * @return the text containing all attachment URI conversions.
     */
    public String applyOn(String text) {
        Matcher matcher;
        String newStr = text;
        while ((matcher = REGEXPR_SHARED_ATTACHMENT.matcher(newStr)).find()) {
            String currentURL = matcher.group(1);
            newStr = matcher.replaceFirst("src=\"" + convertURLToSharedOne(currentURL));
        }
        return newStr;
    }

    /**
     * URL looks like :
     * http://localhost:8000/silverpeas/attached_file/componentId/kmelia144/attachmentId/7088b9d6
     * -ec5a-4a9c-8c0e-dcb77eed704e/lang/fr/name/Penguins.jpg
     * must be converted into :
     * http://localhost:8000
     * /silverpeas/services/attachments/kmelia144/ca36bf15-8e52-4d53-8692-0090845ac409
     * /7088b9d6-ec5a-4a9c-8c0e-dcb77eed704e/Penguins.jpg
     * @return
     */
    private String convertURLToSharedOne(String url) {
        String[] parts = StringUtil.split(url, "/");
        String name = parts[ArrayUtil.indexOf(parts, "name") + 1];
        String id = parts[ArrayUtil.indexOf(parts, "attachmentId") + 1];
        String instanceId = parts[ArrayUtil.indexOf(parts, "componentId") + 1];
        return getBaseURI() + "sharing/attachments/" + instanceId + "/" + getToken() + "/" + id + "/" + name;
    }

    /**
     * Gets the shared URI of the given attachments according to the sharing context.
     * @param attachment the attachment for which the shared URI will be computed.
     * @return the shared URI of the given attachment.
     */
    public URI getSharedUriOf(SimpleDocument attachment) {
        URI sharedUri;
        try {
            sharedUri = URI.create(getBaseURI() + "sharing/attachments/" + attachment.getInstanceId() + "/"
                    + getToken() + "/" + attachment.getId() + "/"
                    + URLEncoder.encode(attachment.getFilename(), CharEncoding.UTF_8));
        } catch (Exception ex) {
            SilverLogger.getLogger(this).error(ex.getMessage(), ex);
            throw new RuntimeException(ex.getMessage(), ex);
        }
        return sharedUri;
    }
}