From 0d4d50ab9c169a7163300f2e39b44a1d4919dff6 Mon Sep 17 00:00:00 2001
From: Petr Pridal <petr.pridal@klokantech.com>
Date: Sun, 12 Aug 2012 20:28:23 +0200
Subject: [PATCH] Initial .mbtiles implementation.

---
 .htaccess                  |   3 +-
 tileserver-mbtiles.for.php | 132 +++++++++++++++++++++++++++++++++++++
 tileserver-mbtiles.php     |  51 +-------------
 tileserver-tms.php         |   4 +-
 tileserver-wmts.php        |   2 +-
 tileserver.php             |   6 +-
 6 files changed, 142 insertions(+), 56 deletions(-)
 create mode 100644 tileserver-mbtiles.for.php

diff --git a/.htaccess b/.htaccess
index 231c089..a49aea1 100644
--- a/.htaccess
+++ b/.htaccess
@@ -30,8 +30,7 @@ RewriteRule ^([\w\d\._-]+)/.+?(\d+)/(\d+)/(\d+)\.(\w+)$ $1/$2/$3/$4.$5 [L]
 
 # MBTiles support at /layer/z/x/y.ext - loads the tile from mbtiles with php
 # TODO: serve also 404 errors for tiles
-RewriteCond %{REQUEST_FILENAME} !-f
-RewriteRule ^([^\/]+)\/(\d+)\/(\d+)\/(\d+)\.(\w+)$ tileserver-mbtiles.php?tileset=$1&z=$2&x=$3&y=$4&ext=$5 [L]
+RewriteRule ^([^\/]+\.mbtiles)\/.*?(\d+)\/(\d+)\/(\d+)\.(\w+)$ tileserver-mbtiles.php?tileset=$1&z=$2&x=$3&y=$4&ext=$5 [L]
 # TODO: use mod_sqlite if available to map the tiles to URL directly by apache
 
 # WMTS KVP
diff --git a/tileserver-mbtiles.for.php b/tileserver-mbtiles.for.php
new file mode 100644
index 0000000..fc9f680
--- /dev/null
+++ b/tileserver-mbtiles.for.php
@@ -0,0 +1,132 @@
+<?php
+// Based on: https://github.com/Zverik/mbtiles-php
+// Read: https://github.com/klokantech/tileserver-php/issues/1
+// TODO: clean the code!!!
+
+if (!is_file($_GET['tileset'] . '.mbtiles')) {
+    header('HTTP/1.0 404 Not Found');
+    echo "<h1>404 Not Found</h1>";
+    echo "TileServer.php could not found what you requested.";
+    die();
+    // TODO: if ($_GET['ext'] == 'png') { ...
+    // TODO: better image 256x256px !!!
+    // header("Content-type: image/png");
+    //print("\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89\x00\x00\x00\rIDAT\x08\xd7c````\x00\x00\x00\x05\x00\x01^\xf3*:\x00\x00\x00\x00IEND\xaeB`\x82");
+}
+
+if (isset($_GET['tileset']) && preg_match('/^[\w\d_-]+$/', $_GET['tileset'])) {
+    $tileset = $_GET['tileset'];
+    $flip    = true;
+    try {
+        $db = new PDO('sqlite:' . $tileset . '.mbtiles', '', '', array(
+            PDO::ATTR_PERSISTENT => true
+        ));
+        if (!isset($db)) {
+            header('Content-type: text/plain');
+            print 'Not possible to connect to SQLite database in file: ' . $_GET['tileset'] . '.mbtiles';
+            exit;
+        }
+        // http://c.tile.openstreetmap.org/12/2392/1190.png
+        $z = floatval($_GET['z']);
+        $y = floatval($_GET['y']);
+        $x = floatval($_GET['x']);
+        if ($flip) {
+            $y = pow(2, $z) - 1 - $y;
+        }
+        $result = $db->query('select tile_data as t from tiles where zoom_level=' . $z . ' and tile_column=' . $x . ' and tile_row=' . $y);
+        $data   = $result->fetchColumn();
+        if (!isset($data) || $data === FALSE) {
+            // TODO: Put here ready to use empty tile!!!
+            $png = imagecreatetruecolor(256, 256);
+            imagesavealpha($png, true);
+            $trans_colour = imagecolorallocatealpha($png, 0, 0, 0, 127);
+            imagefill($png, 0, 0, $trans_colour);
+            header('Content-type: image/png');
+            imagepng($png);
+            //header($_SERVER['SERVER_PROTOCOL'].' 404 Not Found');
+        } else {
+            $result     = $db->query('select value from metadata where name="format"');
+            $resultdata = $result->fetchColumn();
+            $format     = isset($resultdata) && $resultdata !== FALSE ? $resultdata : 'png';
+            if ($format == 'jpg')
+                $format = 'jpeg';
+            header('Content-type: image/' . $format);
+            print $data;
+        }
+    }
+    catch (PDOException $e) {
+        header('Content-type: text/plain');
+        print 'Error querying the database: ' . $e->getMessage();
+    }
+}
+/*
+?><TileMap version="1.0.0" tilemapservice="<?php echo $basetms ?>1.0.0/">
+<Title><?php echo htmlspecialchars($params['name']) ?></Title>
+<Abstract><?php echo htmlspecialchars($params['description']) ?></Abstract>
+<SRS>OSGEO:41001</SRS>
+<BoundingBox minx="-180" miny="-90" maxx="180" maxy="90" />
+<Origin x="0" y="0"/>
+<TileFormat width="256" height="256" mime-type="image/<?php echo $params['format'] == 'jpg' ? 'jpeg' : 'png' ?>" extension="<?php echo $params['format']?>"/>
+<TileSets profile="global-mercator">
+<?php foreach( readzooms($db) as $zoom ) { ?>
+<TileSet href="<?php echo $basetms.'1.0.0/'.$layer.'/'.$zoom ?>" units-per-pixel="<?php echo 78271.516 / pow(2, $zoom) ?>" order="<?php echo $zoom ?>" />
+<?php } ?>
+</TileSets>
+</TileMap>
+<?php
+} catch( PDOException $e ) {}
+}
+} else {
+// show list of all tilesets along with links
+print '<h2>MBTiles PHP proxy</h2>';
+if( $handle = opendir('.') ) {
+$found = false;
+while( ($file = readdir($handle)) !== false ) {
+if( preg_match('/^[\w\d_-]+\.mbtiles$/', $file) && is_file($file) ) {
+try {
+$db = new PDO('sqlite:'.$file);
+$params = readparams($db);
+$zooms = readzooms($db);
+$db = null;
+print '<h3>'.htmlspecialchars($params['name']).'</h3>';
+if( isset($params['description']) )
+print '<p>'.htmlspecialchars($params['description']).'</p>';
+print '<p>Type: '.$params['type'].', format: '.$params['format'].', version: '.$params['version'].'</p>';
+if( isset($params['bounds']) )
+print '<p>Bounds: '.str_replace(',', ', ',$params['bounds']).'</p>';
+print '<p>Zoom levels: '.implode(', ', $zooms).'</p>';
+print '<p>OpenLayers: <tt>new OpenLayers.Layer.OSM("'.htmlspecialchars($params['name']).'", "'.getbaseurl().preg_replace('/\.mbtiles/','',$file).'/${z}/${x}/${y}", {numZoomLevels: '.(end($zooms)+1).', isBaseLayer: '.($params['type']=='baselayer'?'true':'false').'});</tt></p>';
+print '<p>TMS: <tt>http://'.$_SERVER['HTTP_HOST'].preg_replace('/\/[^\/]+$/','/',$_SERVER['REQUEST_URI']).'1.0.0/'.preg_replace('/\.mbtiles/','',$file).'</tt></p>';
+} catch( PDOException $e ) {}
+}
+}
+} else {
+print 'Error opening script directory.';
+}
+}
+
+function getbaseurl() {
+return 'http://'.$_SERVER['HTTP_HOST'].preg_replace('/\/(1.0.0\/)?[^\/]*$/','/',$_SERVER['REQUEST_URI']);
+}
+*/
+function readparams($db)
+{
+    $params = array();
+    $result = $db->query('select name, value from metadata');
+    while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
+        $params[$row['name']] = $row['value'];
+    }
+    return $params;
+}
+
+function readzooms($db)
+{
+    $zooms  = array();
+    $result = $db->query('select zoom_level from tiles group by zoom_level order by zoom_level');
+    while ($zoom = $result->fetchColumn()) {
+        $zooms[] = $zoom;
+    }
+    return $zooms;
+}
+?>
+
diff --git a/tileserver-mbtiles.php b/tileserver-mbtiles.php
index 9f8b508..31aa51d 100644
--- a/tileserver-mbtiles.php
+++ b/tileserver-mbtiles.php
@@ -3,7 +3,7 @@
 // Read: https://github.com/klokantech/tileserver-php/issues/1
 // TODO: clean the code!!!
 
-if (!is_file($_GET['tileset'].'.mbtiles')) {
+if (!is_file($_GET['tileset'])) {
   header('HTTP/1.0 404 Not Found');
   echo "<h1>404 Not Found</h1>";
   echo "TileServer.php could not found what you requested.";
@@ -14,11 +14,11 @@ if (!is_file($_GET['tileset'].'.mbtiles')) {
 //print("\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89\x00\x00\x00\rIDAT\x08\xd7c````\x00\x00\x00\x05\x00\x01^\xf3*:\x00\x00\x00\x00IEND\xaeB`\x82");
 }
 
-if( isset($_GET['tileset']) && preg_match('/^[\w\d_-]+$/', $_GET['tileset']) ) {
+if( isset($_GET['tileset']) ) {
 	$tileset = $_GET['tileset'];
 	$flip = true;
 	try {
-		$db = new PDO('sqlite:'.$tileset.'.mbtiles','','',array(PDO::ATTR_PERSISTENT => true));
+		$db = new PDO('sqlite:'.$tileset,'','',array(PDO::ATTR_PERSISTENT => true));
 		if( !isset($db) ) {
 			header('Content-type: text/plain');
 			print 'Incorrect tileset name: '.$_GET['tileset'];
@@ -57,51 +57,6 @@ if( isset($_GET['tileset']) && preg_match('/^[\w\d_-]+$/', $_GET['tileset']) ) {
 	}
 }
 /*
-			?><TileMap version="1.0.0" tilemapservice="<?php echo $basetms ?>1.0.0/">
-				<Title><?php echo htmlspecialchars($params['name']) ?></Title>
-				<Abstract><?php echo htmlspecialchars($params['description']) ?></Abstract>
-				<SRS>OSGEO:41001</SRS>
-				<BoundingBox minx="-180" miny="-90" maxx="180" maxy="90" />
-				<Origin x="0" y="0"/>
-				<TileFormat width="256" height="256" mime-type="image/<?php echo $params['format'] == 'jpg' ? 'jpeg' : 'png' ?>" extension="<?php echo $params['format']?>"/>
-				<TileSets profile="global-mercator">
-<?php foreach( readzooms($db) as $zoom ) { ?>
-					<TileSet href="<?php echo $basetms.'1.0.0/'.$layer.'/'.$zoom ?>" units-per-pixel="<?php echo 78271.516 / pow(2, $zoom) ?>" order="<?php echo $zoom ?>" />
-<?php } ?>
-				</TileSets>
-				</TileMap>
-				<?php
-		} catch( PDOException $e ) {}
-	}
-} else {
-	// show list of all tilesets along with links
-	print '<h2>MBTiles PHP proxy</h2>';
-	if( $handle = opendir('.') ) {
-		$found = false;
-		while( ($file = readdir($handle)) !== false ) {
-			if( preg_match('/^[\w\d_-]+\.mbtiles$/', $file) && is_file($file) ) {
-				try {
-					$db = new PDO('sqlite:'.$file);
-					$params = readparams($db);
-					$zooms = readzooms($db);
-					$db = null;
-					print '<h3>'.htmlspecialchars($params['name']).'</h3>';
-					if( isset($params['description']) )
-						print '<p>'.htmlspecialchars($params['description']).'</p>';
-					print '<p>Type: '.$params['type'].', format: '.$params['format'].', version: '.$params['version'].'</p>';
-					if( isset($params['bounds']) )
-						print '<p>Bounds: '.str_replace(',', ', ',$params['bounds']).'</p>';
-					print '<p>Zoom levels: '.implode(', ', $zooms).'</p>';
-					print '<p>OpenLayers: <tt>new OpenLayers.Layer.OSM("'.htmlspecialchars($params['name']).'", "'.getbaseurl().preg_replace('/\.mbtiles/','',$file).'/${z}/${x}/${y}", {numZoomLevels: '.(end($zooms)+1).', isBaseLayer: '.($params['type']=='baselayer'?'true':'false').'});</tt></p>';
-					print '<p>TMS: <tt>http://'.$_SERVER['HTTP_HOST'].preg_replace('/\/[^\/]+$/','/',$_SERVER['REQUEST_URI']).'1.0.0/'.preg_replace('/\.mbtiles/','',$file).'</tt></p>';
-				} catch( PDOException $e ) {}
-			}
-		}
-	} else {
-		print 'Error opening script directory.';
-	}
-}
-
 function getbaseurl() {
 	return 'http://'.$_SERVER['HTTP_HOST'].preg_replace('/\/(1.0.0\/)?[^\/]*$/','/',$_SERVER['REQUEST_URI']);
 }
diff --git a/tileserver-tms.php b/tileserver-tms.php
index 7615260..f061122 100644
--- a/tileserver-tms.php
+++ b/tileserver-tms.php
@@ -26,7 +26,7 @@ if ($layer === ""):
   <TileMaps>
 <?php
   foreach ($maps as $m) {
-    $basename = str_replace('.mbtiles', '', $m['basename']);
+    $basename = $m['basename'];
     $title = (array_key_exists('name', $m )) ? $m['name'] : $basename;
     $profile = $m['profile'];
     if ($profile == 'geodetic')
@@ -45,7 +45,7 @@ die;
 # ---------
 else:
     $m = layer($layer);
-    $basename = str_replace('.mbtiles', '', $m['basename']);
+    $basename = $m['basename'];
     $title = (array_key_exists('name', $m )) ? $m['name'] : $basename;
     $description = (array_key_exists('description', $m )) ? $m['description'] : "";
     $bounds = $m['bounds'];
diff --git a/tileserver-wmts.php b/tileserver-wmts.php
index 9ac1aa3..6ff88a9 100644
--- a/tileserver-wmts.php
+++ b/tileserver-wmts.php
@@ -70,7 +70,7 @@ echo "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n"; ?>
 <?php
 
 foreach ($maps as $m) {
-    $basename = str_replace('.mbtiles', '', $m['basename']);
+    $basename = $m['basename'];
     $title = (array_key_exists('name', $m )) ? $m['name'] : $basename;
     $profile = $m['profile'];
     $bounds = $m['bounds'];
diff --git a/tileserver.php b/tileserver.php
index 231bc75..1655aa3 100644
--- a/tileserver.php
+++ b/tileserver.php
@@ -83,7 +83,7 @@ You can easily convert existing geodata (GeoTIFF, ECW, MrSID, etc) to this tile
   echo "<h3>Available maps</h3>";
   echo "<ul>";
   foreach ($maps as $map) {
-    // echo "<li><a href=\"".str_replace('.mbtiles', '', $map['basename'])."\">".$map['name']."</a>" ;
+    // echo "<li><a href=\"".$map['basename']."\">".$map['name']."</a>" ;
     echo "<li>".$map['name'];
   }
   echo "</ul>";
@@ -195,7 +195,7 @@ function metadataTileJson( $metadata ) {
   $metadata['sheme'] = 'xyz';
   $tiles = array();
   foreach($config['baseUrls'] as $url)
-    $tiles[] = $url.str_replace('.mbtiles', '', $metadata['basename']).'/{z}/{x}/{y}.'.$metadata['format'];
+    $tiles[] = $url.$metadata['basename'].'/{z}/{x}/{y}.'.$metadata['format'];
   #print_r($tiles);
   $metadata['tiles'] = $tiles;
   return $metadata;
@@ -405,4 +405,4 @@ class GlobalMercator
 	}
 }
 $mercator = new GlobalMercator();
-?>
\ No newline at end of file
+?>