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71 changes: 71 additions & 0 deletions
71
HMCLCore/src/main/java/org/jackhuang/hmcl/util/logging/TokenFence.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package org.jackhuang.hmcl.util.logging; | ||
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| import java.io.IOException; | ||
| import java.io.Reader; | ||
| import java.io.Writer; | ||
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| final class TokenFence { | ||
| private TokenFence() { | ||
| } | ||
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| public static String filter(String[] accessTokens, String message) { | ||
| for (String token : accessTokens) | ||
| message = message.replace(token, "<access token>"); | ||
| return message; | ||
| } | ||
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| public static void filter(String[] accessTokens, Reader reader, Writer out) throws IOException { | ||
| char[] buffer = new char[1024]; | ||
| for (String token : accessTokens) { | ||
| if (token.length() > buffer.length) { | ||
| buffer = new char[token.length() + 16]; | ||
| } | ||
| filter(token, reader, out, buffer); | ||
| } | ||
| } | ||
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| private static void filter(String token, Reader reader, Writer out, char[] buffer) throws IOException { | ||
| char first = token.charAt(0); | ||
| int start = 0, length; | ||
| while ((length = reader.read(buffer, start, buffer.length - start)) != -1) { | ||
| int fi = TokenFence.indexOf(buffer, 0, length - token.length(), first); | ||
| if (fi == -1 || !TokenFence.isToken(buffer, fi, token)) { | ||
| int fi2 = TokenFence.indexOf(buffer, length - token.length(), buffer.length, first); | ||
| if (fi2 == -1) { | ||
| out.write(buffer, 0, length); | ||
| start = 0; | ||
| } else { | ||
| out.write(buffer, 0, fi2); | ||
| System.arraycopy(buffer, fi2, buffer, 0, length - fi2); | ||
| start = length - fi2; | ||
| } | ||
| } else { | ||
| out.write(buffer, 0, fi); | ||
| out.write("<access token>"); | ||
| System.arraycopy(buffer, fi + token.length(), buffer, 0, token.length()); | ||
| start = 0; | ||
| } | ||
| } | ||
| } | ||
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| private static int indexOf(char[] buffer, int start, int length, char target) { | ||
| for (int i = start; i < length; i++) { | ||
| if (buffer[i] == target) { | ||
| return i; | ||
| } | ||
| } | ||
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| return -1; | ||
| } | ||
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| private static boolean isToken(char[] buffer, int start, String token) { | ||
| for (int i = 1; i < token.length(); i++) { | ||
| if (buffer[start + i] != token.charAt(i)) { | ||
| return false; | ||
| } | ||
| } | ||
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| return true; | ||
| } | ||
| } |
60 changes: 60 additions & 0 deletions
60
HMCLCore/src/test/java/org/jackhuang/hmcl/util/logger/LoggerTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /* | ||
| * Hello Minecraft! Launcher | ||
| * Copyright (C) 2020 huangyuhui <[email protected]> and contributors | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * 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 General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.jackhuang.hmcl.util.logger; | ||
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| import org.jackhuang.hmcl.util.logging.Logger; | ||
| import org.junit.jupiter.api.Test; | ||
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| import java.io.*; | ||
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| import static org.junit.jupiter.api.Assertions.assertEquals; | ||
| import static org.junit.jupiter.api.Assertions.assertNotEquals; | ||
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| public class LoggerTest { | ||
| private static final String TOKEN = "the_token"; | ||
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| @Test | ||
| public void checkTokenFence() throws IOException { | ||
| test("001122334455the_token667788", TOKEN); | ||
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| { | ||
| char[] data = new char[1050]; | ||
| TOKEN.getChars(0, TOKEN.length(), data, 1020); | ||
| test(data, TOKEN); | ||
| } | ||
| } | ||
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| private void test(String data, String token) throws IOException { | ||
| test0(new StringReader(data), token); | ||
| } | ||
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| private void test(char[] data, String token) throws IOException { | ||
| test0(new CharArrayReader(data), token); | ||
| } | ||
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| private void test0(Reader reader, String token) throws IOException { | ||
| Logger.registerAccessToken(token); | ||
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| try (StringWriter writer = new StringWriter()) { | ||
| Logger.filterForbiddenToken(reader, writer); | ||
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| assertEquals(writer.getBuffer().indexOf(token), -1); | ||
| assertNotEquals(writer.getBuffer().indexOf("<access token>"), -1); | ||
| } | ||
| } | ||
| } |