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Improved metadata trimming, to better handle multibyte UTF-8 characters.

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This commit is contained in:
CalDescent
2023-04-28 12:48:38 +01:00
parent 46e2e1043d
commit 45bc2e46d6
2 changed files with 63 additions and 2 deletions
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24
src/main/java/org/qortal/arbitrary/metadata/ArbitraryDataTransactionMetadata.java
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@@ -7,6 +7,7 @@ import org.qortal.arbitrary.misc.Category;
import org.qortal.repository.DataException;
import org.qortal.utils.Base58;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
@@ -217,6 +218,25 @@ public class ArbitraryDataTransactionMetadata extends ArbitraryDataMetadata {
// Static helper methods
public static String trimUTF8String(String string, int maxLength) {
byte[] inputBytes = string.getBytes(StandardCharsets.UTF_8);
int length = Math.min(inputBytes.length, maxLength);
byte[] outputBytes = new byte[length];
System.arraycopy(inputBytes, 0, outputBytes, 0, length);
String result = new String(outputBytes, StandardCharsets.UTF_8);
// check if last character is truncated
int lastIndex = result.length() - 1;
if (lastIndex > 0 && result.charAt(lastIndex) != string.charAt(lastIndex)) {
// last character is truncated so remove the last character
return result.substring(0, lastIndex);
}
return result;
}
public static String limitTitle(String title) {
if (title == null) {
return null;
@@ -225,7 +245,7 @@ public class ArbitraryDataTransactionMetadata extends ArbitraryDataMetadata {
return null;
}
return title.substring(0, Math.min(title.length(), MAX_TITLE_LENGTH));
return trimUTF8String(title, MAX_TITLE_LENGTH);
}
public static String limitDescription(String description) {
@@ -236,7 +256,7 @@ public class ArbitraryDataTransactionMetadata extends ArbitraryDataMetadata {
return null;
}
return description.substring(0, Math.min(description.length(), MAX_DESCRIPTION_LENGTH));
return trimUTF8String(description, MAX_DESCRIPTION_LENGTH);
}
public static List<String> limitTags(List<String> tags) {