commit 89d43be66ddb436968b5b150cf3a67539741931c
Author: MarStr <marcus@marstr.online>
Date:   Mon Aug 19 15:15:38 2024 +0200

    Initial commit with PHP script

diff --git a/index.php b/index.php
new file mode 100644
index 0000000..9b6768e
--- /dev/null
+++ b/index.php
@@ -0,0 +1,43 @@
+<?php
+
+// Our API endpoint to either acquire non-existing, or update existing OSM data files.
+// At the end, provide the XML data to the Orthographic Python client.
+
+
+// The folder where we keep all OSM XMLs
+$root_folder = "/server/osm/";
+
+if (isset($_POST))
+{
+	// Convert the JSON in POST to an array
+	$json = json_decode(file_get_contents('php://input'), true);
+	$filename = $root_folder . $json["tile_lat"] . "-" . $json["square_lat"] . "_" . $json["tile_lng"] . "-" . $json["square_lng"] . ".xml";
+	$url = "http://www.overpass-api.de/api/xapi?*[bbox=".$json["bbox"]["lng"].",".$json["bbox"]["lat"].",".$json["bbox"]["lng_b"].",".$json["bbox"]["lat_b"]."]";
+
+	// Check if the file we are looking for already exists
+	$t_exists = file_exists($filename);
+	
+	// If the file exists, check for its age. If it is older than 30 days, update the file.
+	if ($t_exists == true)
+	{
+		$t = filemtime($filename);
+		if(strtotime($t) < (time()-2592000))
+		{
+			$ovp = file_get_contents($url);
+			file_put_contents($filename, $ovp);
+		}
+	}
+
+	// If, however, the file does not exist, acquire it from Overpass API
+	if ($t_exists == false)
+	{
+		$ovp = file_get_contents($url);
+		file_put_contents($filename, $ovp);
+	}
+
+	// Offer the content as stream for Orthographic to download
+	$xml = file_get_contents($filename);
+	echo $xml;
+}
+
+?>