From a37c875fe503b5e15f4ecc45fae5f4286b1954a8 Mon Sep 17 00:00:00 2001
From: Nico Verbruggen <mail@nicoverbruggen.be>
Date: Mon, 16 Mar 2026 11:47:29 +0100
Subject: [PATCH] Validate firmware check

---
 kobopatch-wasm/test-integration.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/kobopatch-wasm/test-integration.sh b/kobopatch-wasm/test-integration.sh
index 12cfbad..a9964e8 100755
--- a/kobopatch-wasm/test-integration.sh
+++ b/kobopatch-wasm/test-integration.sh
@@ -19,7 +19,14 @@ cd "$(dirname "$0")"
 if [ ! -f "$FIRMWARE_FILE" ]; then
     echo "Downloading firmware ${FIRMWARE_VERSION} (~150MB)..."
     mkdir -p "$FIRMWARE_DIR"
-    curl -L --progress-bar -o "$FIRMWARE_FILE" "$FIRMWARE_URL"
+    curl -fL --progress-bar -o "$FIRMWARE_FILE.tmp" "$FIRMWARE_URL"
+    # Validate it's actually a zip file.
+    if ! file "$FIRMWARE_FILE.tmp" | grep -q "Zip archive"; then
+        echo "ERROR: downloaded file is not a valid zip"
+        rm -f "$FIRMWARE_FILE.tmp"
+        exit 1
+    fi
+    mv "$FIRMWARE_FILE.tmp" "$FIRMWARE_FILE"
     echo "Downloaded to $FIRMWARE_FILE"
 else
     echo "Using cached firmware: $FIRMWARE_FILE"