com.liferay.mobile.android.http.file.DownloadUtil.java Source code

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Here is the source code for com.liferay.mobile.android.http.file.DownloadUtil.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.android.http.file;

import android.net.Uri;

import com.liferay.mobile.android.auth.Authentication;
import com.liferay.mobile.android.auth.basic.DigestAuthentication;
import com.liferay.mobile.android.http.HttpUtil;
import com.liferay.mobile.android.service.Session;
import com.liferay.mobile.android.util.PortalVersion;
import com.liferay.mobile.android.util.Validator;

import java.io.InputStream;
import java.io.OutputStream;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGetHC4;
import org.apache.http.impl.client.HttpClientBuilder;

import static com.liferay.mobile.android.http.file.FileTransferUtil.*;

/**
 * @author Bruno Farache
 */
public class DownloadUtil {

    public static void download(Session session, OutputStream os, String URL, FileProgressCallback callback)
            throws Exception {

        HttpClientBuilder clientBuilder = HttpUtil.getClientBuilder(session);
        HttpGetHC4 request = HttpUtil.getHttpGet(session, URL);

        HttpResponse response = clientBuilder.build().execute(request);
        HttpUtil.checkStatusCode(request, response);
        InputStream is = response.getEntity().getContent();

        try {
            transfer(request, is, os, callback);
        } finally {
            close(is);
        }
    }

    public static void downloadWebDAVFile(Session session, int portalVersion, String groupFriendlyURL,
            String folderPath, String fileTitle, OutputStream os, FileProgressCallback callback) throws Exception {

        Authentication auth = session.getAuthentication();

        if ((auth != null) && !(auth instanceof DigestAuthentication)) {
            throw new Exception(
                    "Can't download file if authentication implementation is not " + "DigestAuthentication");
        }

        String URL = getWebDAVFileURL(session, portalVersion, groupFriendlyURL, folderPath, fileTitle);

        download(session, os, URL, callback);
    }

    public static String getWebDAVFileURL(Session session, int portalVersion, String groupFriendlyURL,
            String folderPath, String fileTitle) throws Exception {

        StringBuilder sb = new StringBuilder();
        sb.append(session.getServer());

        if (portalVersion < PortalVersion.V_6_2) {
            sb.append("/api/secure");
        }

        sb.append("/webdav");
        sb.append(prependSlash(groupFriendlyURL));
        sb.append("/document_library");

        StringBuilder webdavPath = new StringBuilder();

        webdavPath.append(prependSlash(folderPath));
        webdavPath.append(prependSlash(fileTitle));

        sb.append(encoder.encode(webdavPath.toString()));

        return sb.toString();
    }

    protected static String prependSlash(String string) {
        if (Validator.isNotNull(string) && !string.startsWith("/")) {
            return "/" + string;
        }

        return string;
    }

    protected static URLEncoder encoder = new URLEncoder();

    protected static class URLEncoder {

        public String encode(String path) throws Exception {
            return Uri.encode(path, ALLOWED_URI_CHARS);
        }

        private final String ALLOWED_URI_CHARS = "@#&=*+-_.,:!?()/~'%";

    }

}