From f2cb0f5a5faf3d7a3941caa99b762ee9743340fe Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Thu, 13 Jan 2022 08:09:16 +0300
Subject: mail: handle invalid In-Reply-To header

---
 src/main/java/com/juick/www/api/Service.java | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/src/main/java/com/juick/www/api/Service.java b/src/main/java/com/juick/www/api/Service.java
index f7c7a4aa..81b24a23 100644
--- a/src/main/java/com/juick/www/api/Service.java
+++ b/src/main/java/com/juick/www/api/Service.java
@@ -36,6 +36,7 @@ import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.RandomStringUtils;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.math.NumberUtils;
 import org.apache.commons.mail.util.MimeMessageParser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -140,7 +141,8 @@ public class Service {
                                 try {
                                     logger.info("got inputstream: {}", a.getInputStream());
                                     FileOutputStream fos = new FileOutputStream(
-                                            Paths.get(storageService.getTemporaryDirectory(), attachmentFName[0]).toString());
+                                            Paths.get(storageService.getTemporaryDirectory(), attachmentFName[0])
+                                                    .toString());
                                     IOUtils.copy(a.getInputStream(), fos);
                                     fos.close();
                                 } catch (IOException e) {
@@ -150,19 +152,26 @@ public class Service {
                     String[] inReplyToHeaders = msg.getHeader("In-Reply-To");
                     if (inReplyToHeaders != null && inReplyToHeaders.length > 0) {
                         int mid, rid;
-                        var originalMessage = messagesService.findMessageByProperty("messageId", inReplyToHeaders[0]);
+                        String inReplyTo = inReplyToHeaders[0].trim();
+                        var originalMessage = messagesService.findMessageByProperty("messageId", inReplyTo);
                         if (originalMessage.isPresent()) {
                             mid = originalMessage.get().getLeft();
                             rid = originalMessage.get().getRight();
                         } else {
-                            Scanner inReplyToScanner = new Scanner(inReplyToHeaders[0].trim())
+                            Scanner inReplyToScanner = new Scanner(inReplyTo)
                                     .useDelimiter(EmailManager.MSGID_PATTERN);
-                            mid = Integer.parseInt(inReplyToScanner.next());
-                            rid = Integer.parseInt(inReplyToScanner.next());
+                            mid = NumberUtils.toInt(inReplyToScanner.next(), 0);
+                            rid = NumberUtils.toInt(inReplyToScanner.next(), 0);
+                            inReplyToScanner.close();
+                        }
+                        if (mid > 0) {
+                            logger.info("Message is reply to #{}/{}", mid, rid);
+                            body[0] = rid > 0 ? String.format("#%d/%d %s", mid, rid, body[0])
+                                    : String.format("#%d %s", mid, body[0]);
+                        } else {
+                            logger.warn("Unknown In-Reply-To: {}", inReplyTo);
+                            return;
                         }
-                        logger.info("Message is reply to #{}/{}", mid, rid);
-                        body[0] = rid > 0 ? String.format("#%d/%d %s", mid, rid, body[0])
-                                : String.format("#%d %s", mid, body[0]);
                     }
                     URI attachmentUri = StringUtils.isNotEmpty(attachmentFName[0])
                             ? URI.create(String.format("juick://%s", attachmentFName[0]))
-- 
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