From 211a9e35eb87ce71a00ecbdf8ca204c3e3110bb2 Mon Sep 17 00:00:00 2001
From: eosxx <eospeng@gmail.com>
Date: Thu, 11 Jun 2026 17:50:42 +0900
Subject: [PATCH] fix: reject HTTP 400 responses as errors

---
 KTVHTTPCache/Classes/KTVHCDownload/KTVHCDownload.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/KTVHTTPCache/Classes/KTVHCDownload/KTVHCDownload.m b/KTVHTTPCache/Classes/KTVHCDownload/KTVHCDownload.m
index ebfee647..02763a41 100644
--- a/KTVHTTPCache/Classes/KTVHCDownload/KTVHCDownload.m
+++ b/KTVHTTPCache/Classes/KTVHCDownload/KTVHCDownload.m
@@ -178,7 +178,8 @@ - (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)task
     NSHTTPURLResponse *HTTPURLResponse = nil;
     if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
         HTTPURLResponse = (NSHTTPURLResponse *)response;
-        if (HTTPURLResponse.statusCode > 400) {
+        // HTTP client and server error responses must not be cached as downloaded content.
+        if (HTTPURLResponse.statusCode >= 400) {
             error = [KTVHCError errorForResponseStatusCode:task.currentRequest.URL
                                                    request:task.currentRequest
                                                   response:task.response];