com.liferay.mobile.sdk.util.PortraitUtil.java Source code

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Here is the source code for com.liferay.mobile.sdk.util.PortraitUtil.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.mobile.sdk.util;

import com.liferay.mobile.sdk.Callback;
import com.liferay.mobile.sdk.Config;
import com.liferay.mobile.sdk.file.DownloadUtil;
import com.liferay.mobile.sdk.file.FileProgressCallback;
import com.liferay.mobile.sdk.http.Headers;
import com.liferay.mobile.sdk.http.Response;

import java.io.Closeable;
import java.io.IOException;
import java.io.OutputStream;

import java.net.URLEncoder;

import java.security.MessageDigest;

import org.apache.commons.codec.binary.Base64;

/**
 * @author Bruno Farache
 * @author Silvio Santos
 */
public class PortraitUtil {

    public static String downloadPortrait(Config config, String portraitURL, final OutputStream os,
            String modifiedDate, Callback callback) throws Exception {

        String lastModified = null;

        try {
            if (Validator.isNotNull(modifiedDate)) {
                config = config.newBuilder().header(Headers.IF_MODIFIED_SINCE, modifiedDate).build();
            }

            Response response = DownloadUtil.download(config, portraitURL, callback, new FileProgressCallback() {

                @Override
                public void onBytes(byte[] bytes) {
                    try {
                        os.write(bytes);
                    } catch (IOException ioe) {
                        setCancelled(true);
                    }
                }

                @Override
                public void onProgress(int totalBytes) {
                }

            });

            lastModified = response.headers().get(Headers.LAST_MODIFIED);
        } finally {
            close(os);
        }

        return lastModified;
    }

    public static String getPortraitURL(Config config, boolean male, long portraitId, String uuid)
            throws Exception {

        StringBuilder sb = new StringBuilder();

        sb.append(config.server());
        sb.append("/image/user_");

        if (male) {
            sb.append("male");
        } else {
            sb.append("female");
        }

        sb.append("_portrait?img_id=");
        sb.append(portraitId);
        appendToken(sb, uuid);

        return sb.toString();
    }

    protected static void appendToken(StringBuilder sb, String uuid) throws Exception {

        if (Validator.isNull(uuid)) {
            return;
        }

        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        digest.update(uuid.getBytes());
        byte[] bytes = digest.digest();
        byte[] encodedBytes = Base64.encodeBase64(bytes);
        String token = new String(encodedBytes);

        sb.append("&img_id_token=");
        sb.append(URLEncoder.encode(token, "UTF8"));
    }

    protected static void close(Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException ioe) {
            }
        }
    }

}