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fix(wireguard-dashboard): Bypass jshn for QR code output to avoid argument size limit

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The base64-encoded SVG QR code exceeded jshn's argument list limit,
causing "Argument list too long" errors. Build the JSON response
manually via file I/O so the large string is never passed as a
command argument.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
CyberMind-FR 2026-02-03 16:57:53 +01:00
parent 2ab0965917
commit 75e3f59207
1 changed files with 9 additions and 5 deletions
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14
package/secubox/luci-app-wireguard-dashboard/root/usr/libexec/rpcd/luci.wireguard-dashboard
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@ -788,13 +788,17 @@ PersistentKeepalive = 25"
PresharedKey = ${psk}"
fi
# Generate QR code as SVG (PNG disabled in OpenWrt qrencode) and convert to base64
local qr_base64=$(echo "$config" | qrencode -t SVG -o - | base64 -w 0)
# Generate QR code as SVG and convert to base64
# Build JSON manually to avoid jshn "Argument list too long" with large base64 strings
local tmpfile="/tmp/wg_qr_$$.json"
local config_escaped=$(printf '%s' "$config" | sed 's/\\/\\\\/g; s/"/\\"/g' | awk '{printf "%s\\n", $0}' | sed '$ s/\\n$//')
json_add_string "qrcode" "data:image/svg+xml;base64,$qr_base64"
json_add_string "config" "$config"
printf '{"qrcode":"data:image/svg+xml;base64,' > "$tmpfile"
echo "$config" | qrencode -t SVG -o - | base64 -w 0 >> "$tmpfile"
printf '","config":"%s"}\n' "$config_escaped" >> "$tmpfile"
json_dump
cat "$tmpfile"
rm -f "$tmpfile"
}
# Get bandwidth history (if vnstat available)