rsemcs/dynmap/web/standalone/SQLite_tiles.php

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PHP
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2022-05-12 09:33:18 +00:00
<?php
ob_start();
require 'dynmap_access.php';
ob_end_clean();
session_start();
if (isset($_SESSION['userid'])) {
$userid = $_SESSION['userid'];
} else {
$userid = '-guest-';
}
$loggedin = false;
if (strcmp($userid, '-guest-')) {
$loggedin = true;
}
$path = $_REQUEST['tile'];
if ((!isset($path)) || strstr($path, "..")) {
header('HTTP/1.0 500 Error');
echo "<h1>500 Error</h1>";
echo "Bad marker: " . $path;
exit();
}
$parts = explode("/", $path);
if (count($parts) != 4) {
header('Location: ../images/blank.png');
exit;
}
$uid = '[' . strtolower($userid) . ']';
$world = $parts[0];
if (isset($worldaccess[$world])) {
$ss = stristr($worldaccess[$world], $uid);
if ($ss === false) {
header('Location: ../images/blank.png');
exit;
}
}
$variant = 'STANDARD';
$prefix = $parts[1];
$plen = strlen($prefix);
if (($plen > 4) && (substr($prefix, $plen - 4) === "_day")) {
$prefix = substr($prefix, 0, $plen - 4);
$variant = 'DAY';
}
$mapid = $world . "." . $prefix;
if (isset($mapaccess[$mapid])) {
$ss = stristr($mapaccess[$mapid], $uid);
if ($ss === false) {
header('Location: ../images/blank.png');
exit;
}
}
$fparts = explode("_", $parts[3]);
if (count($fparts) == 3) { // zoom_x_y
$zoom = strlen($fparts[0]);
$x = intval($fparts[1]);
$y = intval($fparts[2]);
} elseif (count($fparts) == 2) { // x_y
$zoom = 0;
$x = intval($fparts[0]);
$y = intval($fparts[1]);
} else {
header('Location: ../images/blank.png');
exit;
}
$db = new SQLite3($dbfile, SQLITE3_OPEN_READONLY);
$stmt = $db->prepare('SELECT Tiles.Image,Tiles.Format,Tiles.HashCode,Tiles.LastUpdate,Tiles.ImageLen FROM Maps JOIN Tiles ON Maps.ID=Tiles.MapID WHERE Maps.WorldID=:wid AND Maps.MapID=:mapid AND Maps.Variant=:var AND Tiles.x=:x AND Tiles.y=:y and Tiles.zoom=:zoom');
$stmt->bindValue(':wid', $world, SQLITE3_TEXT);
$stmt->bindValue(':mapid', $prefix, SQLITE3_TEXT);
$stmt->bindValue(':var', $variant, SQLITE3_TEXT);
$stmt->bindValue(':x', $x, SQLITE3_INTEGER);
$stmt->bindValue(':y', $y, SQLITE3_INTEGER);
$stmt->bindValue(':zoom', $zoom, SQLITE3_INTEGER);
$res = $stmt->execute();
$row = $res->fetchArray();
if (isset($row[1])) {
$format = $row[1];
if ($format == 0) {
header('Content-Type: image/png');
} else if ($format == 2) {
header('Content-Type: image/webp');
} else {
header('Content-Type: image/jpeg');
}
header('ETag: \'' . $row[2] . '\'');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $row[3] / 1000) . ' GMT');
if ($row[4] > 0) {
$v = substr($row[0], 0, $row[4]);
} else {
$v = rtrim($row[0], "\0");
}
header('Content-Length: ' . strlen($v));
echo $v;
} else {
header('Location: ../images/blank.png');
}
$res->finalize();
$stmt->close();
$db->close();
exit;