From 3d824853af1030004f8ec4ecdd61e917d00e382e Mon Sep 17 00:00:00 2001
From: Michael Green <84688932+michael-j-green@users.noreply.github.com>
Date: Sat, 17 Jan 2026 17:45:30 +1100
Subject: [PATCH] Validate Content-Length header before parsing in EJS_Download
 class

---
 data/src/cache.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/data/src/cache.js b/data/src/cache.js
index e9a4e46..b3230c3 100644
--- a/data/src/cache.js
+++ b/data/src/cache.js
@@ -113,7 +113,10 @@ class EJS_Download {
                         let contentLength = 0;
                         if (resp.headers.get("Content-Length")) {
                             try {
-                                contentLength = parseInt(resp.headers.get("Content-Length"));
+                                const parsedContentLength = parseInt(resp.headers.get("Content-Length"));
+                                if (!isNaN(parsedContentLength) && parsedContentLength > 0) {
+                                    contentLength = parsedContentLength;
+                                }
                             } catch (e) {
                                 // swallow any errors parseing content length
                             }