70 Zeilen
2.5 KiB
Java
70 Zeilen
2.5 KiB
Java
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/*
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* This file is a part of the SteamWar software.
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*
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* Copyright (C) 2021 SteamWar.de-Serverteam
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.steamwar.sql;
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import de.steamwar.sql.internal.Field;
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import de.steamwar.sql.internal.Statement;
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import de.steamwar.sql.internal.Table;
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import lombok.AllArgsConstructor;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.Timestamp;
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import java.time.Instant;
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@AllArgsConstructor
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public class NodeDownload {
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private static final char[] HEX = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
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private static final String LINK_BASE = "https://steamwar.de/download.php?schem=";
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private static final Table<NodeDownload> table = new Table<>(NodeDownload.class);
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private static final Statement insert = table.insertFields("NodeId", "Link");
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@Field(keys = {Table.PRIMARY})
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private final int nodeId;
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@Field
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private final String link;
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@Field(def = "CURRENT_TIMESTAMP")
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private final Timestamp timestamp;
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public static String getLink(SchematicNode schem){
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if(schem.isDir())
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throw new SecurityException("Can not Download Directorys");
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MessageDigest digest;
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try {
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digest = MessageDigest.getInstance("SHA-1");
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} catch (NoSuchAlgorithmException e) {
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throw new SecurityException(e);
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}
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digest.reset();
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digest.update((Instant.now().toString() + schem.getOwner() + schem.getId()).getBytes());
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String hash = base16encode(digest.digest());
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insert.update(schem.getId(), hash);
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return LINK_BASE + hash;
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}
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public static String base16encode(byte[] byteArray) {
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StringBuilder hexBuffer = new StringBuilder(byteArray.length * 2);
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for (byte b : byteArray)
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hexBuffer.append(HEX[b >> 4]).append(HEX[b & 0xF]);
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return hexBuffer.toString();
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}
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}
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