From 25f7144dacf0f40bc52a42ffaa1913127fbdfa87 Mon Sep 17 00:00:00 2001
From: Shinsuke Sugaya <shinsuke@apache.org>
Date: Thu, 26 Sep 2024 10:31:44 +0900
Subject: [PATCH] fix #2844 Ignore case sensitivity in canonical URL comparison
 to prevent unnecessary redirects

---
 .../codelibs/fess/crawler/transformer/FessXpathTransformer.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java b/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
index 22b299477..541097da4 100644
--- a/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
+++ b/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
@@ -341,7 +341,7 @@ protected Map<String, Object> processAdditionalData(final Map<String, Object> da
             final Document document) {
         // canonical
         final String canonicalUrl = getCanonicalUrl(responseData, document);
-        if (canonicalUrl != null && !canonicalUrl.equals(responseData.getUrl()) && isValidUrl(canonicalUrl)
+        if (canonicalUrl != null && !canonicalUrl.equalsIgnoreCase(responseData.getUrl()) && isValidUrl(canonicalUrl)
                 && isValidCanonicalUrl(responseData.getUrl(), canonicalUrl)) {
             final Set<RequestData> childUrlSet = new HashSet<>();
             childUrlSet.add(RequestDataBuilder.newRequestData().get().url(canonicalUrl).build());