From 401172eb368220acfcf7503b0ea535191f765bb8 Mon Sep 17 00:00:00 2001
From: billz <billzimmerman@gmail.com>
Date: Sat, 22 Mar 2025 03:11:03 -0700
Subject: [PATCH] Initial commit

---
 app/img/uri-qr-code.php | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100755 app/img/uri-qr-code.php

diff --git a/app/img/uri-qr-code.php b/app/img/uri-qr-code.php
new file mode 100755
index 00000000..41124dfb
--- /dev/null
+++ b/app/img/uri-qr-code.php
@@ -0,0 +1,29 @@
+<?php
+
+if (!isset($_GET['uri']) || !filter_var($_GET['uri'], FILTER_VALIDATE_URL)) {
+    header("HTTP/1.1 400 Bad Request");
+    exit("Invalid or missing URI parameter");
+}
+
+$uri = $_GET['uri'];
+$command = "qrencode -t svg -m 0 -o - " . escapeshellarg($uri);
+
+$svg = shell_exec($command);
+if ($svg === null) {
+    error_log("QR generation failed for URI: $uri");
+    header("HTTP/1.1 500 Internal Server Error");
+    exit("Failed to generate QR code");
+}
+
+$etag = hash('sha256', $uri);
+$content_length = strlen($svg);
+$last_modified = gmdate("D, d M Y H:i:s") . " GMT";
+
+header("Content-Type: image/svg+xml");
+header("Content-Length: $content_length");
+header("Last-Modified: $last_modified");
+header("ETag: \"$etag\"");
+header("X-QR-Code-Content: " . htmlspecialchars($uri, ENT_QUOTES, 'UTF-8'));
+
+echo $svg;
+