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Improved handling for URLs that are composed of mixed character sets.

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This commit is contained in:
Greyson Parrelli 2019-02-20 17:00:23 -08:00
parent 9d21c36ddf
commit b2d4608cdb
4 changed files with 149 additions and 8 deletions
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8
src/org/thoughtcrime/securesms/conversation/ConversationItem.java
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@ -47,6 +47,7 @@ import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.attachments.Attachment;
import org.thoughtcrime.securesms.components.LinkPreviewView;
import org.thoughtcrime.securesms.linkpreview.LinkPreview;
import org.thoughtcrime.securesms.linkpreview.LinkPreviewUtil;
import org.thoughtcrime.securesms.logging.Log;
import android.util.TypedValue;
import android.view.View;
@ -55,6 +56,8 @@ import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.annimon.stream.Stream;
import org.thoughtcrime.securesms.attachments.DatabaseAttachment;
import org.thoughtcrime.securesms.components.AlertView;
import org.thoughtcrime.securesms.components.AudioView;
@ -660,7 +663,12 @@ public class ConversationItem extends LinearLayout
boolean hasLinks = Linkify.addLinks(messageBody, shouldLinkifyAllLinks ? linkPattern : 0);
if (hasLinks) {
Stream.of(messageBody.getSpans(0, messageBody.length(), URLSpan.class))
.filterNot(url -> LinkPreviewUtil.isLegalUrl(url.getURL()))
.forEach(messageBody::removeSpan);
URLSpan[] urlSpans = messageBody.getSpans(0, messageBody.length(), URLSpan.class);
for (URLSpan urlSpan : urlSpans) {
int start = messageBody.getSpanStart(urlSpan);
int end = messageBody.getSpanEnd(urlSpan);

99
src/org/thoughtcrime/securesms/linkpreview/LegalUrlPatterns.java Normal file
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@ -0,0 +1,99 @@
package org.thoughtcrime.securesms.linkpreview;
import java.util.regex.Pattern;
public class LegalUrlPatterns {
public static final Pattern LATIN = Pattern.compile("[" +
"\\x{0041}-\\x{005A}" +
"\\x{0061}-\\x{007A}" +
"\\x{00AA}" +
"\\x{00BA}" +
"\\x{00C0}-\\x{00DC}" +
"\\x{00D8}-\\x{00F6}" +
"\\x{00F8}-\\x{01BA}" +
"]");
public static final Pattern CYRILLIC = Pattern.compile("[" +
"\\x{0400}-\\x{0481}" +
"\\x{0482}" +
"\\x{0483}-\\x{0484}" +
"\\x{0487}" +
"\\x{0488}-\\x{0489}" +
"\\x{048A}-\\x{052F}" +
"\\x{1C80}-\\x{1C88}" +
"\\x{1D2B}" +
"\\x{1D78}" +
"\\x{2DE0}-\\x{2DFF}" +
"\\x{A640}-\\x{A66D}" +
"\\x{A66E}" +
"\\x{A66F}" +
"\\x{A670}-\\x{A672}" +
"\\x{A673}" +
"\\x{A674}-\\x{A67D}" +
"\\x{A67E}" +
"\\x{A67F}" +
"\\x{A680}-\\x{A69B}" +
"\\x{A69C}-\\x{A69D}" +
"\\x{A69E}-\\x{A69F}" +
"\\x{FE2E}-\\x{FE2F}" +
"]");
public static final Pattern GREEK = Pattern.compile("[" +
"\\x{0370}-\\x{0373}" +
"\\x{0375}" +
"\\x{0376}-\\x{0377}" +
"\\x{037A}" +
"\\x{037B}-\\x{037D}" +
"\\x{037F}" +
"\\x{0384}" +
"\\x{0386}" +
"\\x{0388}-\\x{038A}" +
"\\x{038C}" +
"\\x{038E}-\\x{03A1}" +
"\\x{03A3}-\\x{03E1}" +
"\\x{03F0}-\\x{03F5}" +
"\\x{03F6}" +
"\\x{03F7}-\\x{03FF}" +
"\\x{1D26}-\\x{1D2A}" +
"\\x{1D5D}-\\x{1D61}" +
"\\x{1D66}-\\x{1D6A}" +
"\\x{1DBF}" +
"\\x{1F00}-\\x{1F15}" +
"\\x{1F18}-\\x{1F1D}" +
"\\x{1F20}-\\x{1F45}" +
"\\x{1F48}-\\x{1F4D}" +
"\\x{1F50}-\\x{1F57}" +
"\\x{1F59}" +
"\\x{1F5B}" +
"\\x{1F5D}" +
"\\x{1F5F}-\\x{1F7D}" +
"\\x{1F80}-\\x{1FB4}" +
"\\x{1FB6}-\\x{1FBC}" +
"\\x{1FBD}" +
"\\x{1FBE}" +
"\\x{1FBF}-\\x{1FC1}" +
"\\x{1FC2}-\\x{1FC4}" +
"\\x{1FC6}-\\x{1FCC}" +
"\\x{1FCD}-\\x{1FCF}" +
"\\x{1FD0}-\\x{1FD3}" +
"\\x{1FD6}-\\x{1FDB}" +
"\\x{1FDD}-\\x{1FDF}" +
"\\x{1FE0}-\\x{1FEC}" +
"\\x{1FED}-\\x{1FEF}" +
"\\x{1FF2}-\\x{1FF4}" +
"\\x{1FF6}-\\x{1FFC}" +
"\\x{1FFD}-\\x{1FFE}" +
"\\x{2126}" +
"\\x{AB65}" +
"\\x{10140}-\\x{10174}"+
"\\x{10175}-\\x{10178}"+
"\\x{10179}-\\x{10189}"+
"\\x{1018A}-\\x{1018B}"+
"\\x{1018C}-\\x{1018E}"+
"\\x{101A0}"+
"\\x{1D200}-\\x{1D241}"+
"\\x{1D242}-\\x{1D244}"+
"\\x{1D245}"+
"]");
}

14
src/org/thoughtcrime/securesms/linkpreview/LinkPreviewUtil.java
View File

@ -40,7 +40,8 @@ public final class LinkPreviewUtil {
return url != null &&
!TextUtils.isEmpty(url.scheme()) &&
"https".equals(url.scheme()) &&
LinkPreviewDomains.LINKS.contains(url.host());
LinkPreviewDomains.LINKS.contains(url.host()) &&
isLegalUrl(linkUrl);
}
/**
@ -51,6 +52,15 @@ public final class LinkPreviewUtil {
return url != null &&
!TextUtils.isEmpty(url.scheme()) &&
"https".equals(url.scheme()) &&
LinkPreviewDomains.IMAGES.contains(url.topPrivateDomain());
LinkPreviewDomains.IMAGES.contains(url.topPrivateDomain()) &&
isLegalUrl(mediaUrl);
}
public static boolean isLegalUrl(@NonNull String url) {
if (LegalUrlPatterns.LATIN.matcher(url).find()) {
return !LegalUrlPatterns.CYRILLIC.matcher(url).find() &&
!LegalUrlPatterns.GREEK.matcher(url).find();
}
return true;
}
}

24
test/unitTest/java/org/thoughtcrime/securesms/linkpreview/LinkPreviewUtilTest.java Normal file
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@ -0,0 +1,24 @@
package org.thoughtcrime.securesms.linkpreview;
import org.junit.Test;
import static junit.framework.TestCase.assertFalse;
import static junit.framework.TestCase.assertTrue;
public class LinkPreviewUtilTest {
@Test
public void isLegal_allLatin() {
assertTrue(LinkPreviewUtil.isLegalUrl("https://signal.org"));
}
@Test
public void isLegal_latinAndCyrillic() {
assertFalse(LinkPreviewUtil.isLegalUrl("https://www.аmazon.com"));
}
@Test
public void isLegal_latinAndGreek() {
assertFalse(LinkPreviewUtil.isLegalUrl("https://www.αpple.com"));
}
}