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index.php
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<?php
# This code is built by a script so it's ugly as hell. But easier to maintain.
# And this is a fucking mess anyway; I'm commiting WIP garbage so by all means,
# delight in the chaos.
# ------------------- CONFIG ---------------------------
# Where the media files are; this needs to be inside the public-facing document root.
define('MEDIA_ROOT', "media");
# This is where we'll keep persistent content, like thumbnails and (later) configs
# Nothing of security-related importance will go here so don't worry if anyone gets
# in there and starts poking around. "Oh boy: all the thumbnails!"
define('DATA_ROOT', ".data");
define('THUMBS_ROOT', DATA_ROOT . DIRECTORY_SEPARATOR. "thumbs"); # leave empty to disable
define('THUMB_WIDTH', 200);
# We'll only show these file types; everything else is ignored.
define('MEDIA_TYPES', "jpg,jpeg,gif,png,bmp,webp,mp4,mkv,mov,wav,ogg,mp3,pdf,txt");
/* ------------------------------------------------------ */
/* -------- Nothing below here is confgurable. ---------- */
/* ------------------------------------------------------ */
$has_dirs = false;
define('HEADER_HTML', <<<HEADER_HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://unpkg.com/@picocss/pico@latest/css/pico.min.css">
<title>$path</title>
</head>
<style>
##CSS##
</style>
<body>
HEADER_HTML);
define('FOOTER_HTML', <<<FOOTER_HTML
<footer>
<center>This gallery software is very much a WIP. It's exceedingly simplistic.</center>
</footer>
</body>
</html>
FOOTER_HTML);
define('CSS', <<<CSS
body{padding:1em}audio,img,video{height:100%;width:100%}hr.section{margin:3rem 1rem}.media-container{display:grid;gap:2em;grid-auto-rows:minmax(200px,auto);grid-template-columns:repeat(4,1fr)}.dir-entry{background-color:#f003;background:#020024;background:linear-gradient(52deg,rgba(0,0,0,.15),hsla(0,0%,100%,.25));border-radius:10px;box-shadow:0 0 20px #000;font-weight:700;height:100%;justify-content:center;text-align:center;text-decoration:underline}.dir-entry,.entry{display:flex;flex-direction:column;overflow:hidden}.entry{background-color:#0003;box-shadow:0 3px 20px #000;justify-content:top;padding:.25em;position:relative;transition:box-shadow .25s,top .25s}.entry:hover{box-shadow:0 0 3px #000;top:3px}.filename{color:#fff;font-size:.8em;line-height:1;overflow:hidden;padding:.25em;text-align:center;text-transform:capitalize}.readmemd{background-color:hsla(0,0%,100%,.01);border-radius:10px;margin-top:2rem;padding:1em}
CSS);
?>
<?php
// more will happen here; probably
class Data
{
public function __construct()
{
if (!file_exists(DATA_ROOT)) {
mkdir(DATA_ROOT);
}
if (!file_exists(THUMBS_ROOT)) {
mkdir(THUMBS_ROOT);
}
}
}
?>
<?php
/* -- PAGE TEMPLATES --------------------------- */
function pageHeader($path)
{
return str_replace('##CSS##', CSS, HEADER_HTML);
}
function pageFooter()
{
return FOOTER_HTML;
}
function pageMediaStart()
{
return "<div class='media-container'>";
}
function pageMediaEnd()
{
return "</div>";
}
/* ---------------------------- */
function main()
{
$userPath = array_key_exists('path', $_GET) ? $_GET['path'] : '';
if ($userPath === '/') {
header('Location: /');
$userPath = '';
// die;
}
if (!empty($userPath)) {
// reject path traversal
$a = pathinfo(__FILE__, PATHINFO_DIRNAME) . DIRECTORY_SEPARATOR . MEDIA_ROOT . DIRECTORY_SEPARATOR . $userPath;
$b = pathinfo(__FILE__, PATHINFO_DIRNAME);
$foo = realpath($a);
$bar = realpath($b);
$isok = strpos($foo, $bar) !== false;
if (!$isok) {
header('Location: /');
die();
}
}
$data = new Data();
echo pageHeader($userPath);
echo "<h1><a href='index.php?path=" . dirname($userPath, 1) . "'>" . $userPath . "</a></h1>";
renderDirectories($userPath);
renderAssets($userPath);
renderReadmeMD($userPath);
echo pageFooter();
}
?>
<?php
#
#
# Parsedown
# http://parsedown.org
#
# (c) Emanuil Rusev
# http://erusev.com
#
# For the full license information, view the LICENSE file that was distributed
# with this source code.
#
#
class Parsedown
{
# ~
const version = '1.8.0-beta-7';
# ~
public function text($text)
{
$Elements = $this->textElements($text);
# convert to markup
$markup = $this->elements($Elements);
# trim line breaks
$markup = trim($markup, "\n");
return $markup;
}
protected function textElements($text)
{
# make sure no definitions are set
$this->DefinitionData = array();
# standardize line breaks
$text = str_replace(array("\r\n", "\r"), "\n", $text);
# remove surrounding line breaks
$text = trim($text, "\n");
# split text into lines
$lines = explode("\n", $text);
# iterate through lines to identify blocks
return $this->linesElements($lines);
}
#
# Setters
#
public function setBreaksEnabled($breaksEnabled)
{
$this->breaksEnabled = $breaksEnabled;
return $this;
}
protected $breaksEnabled;
public function setMarkupEscaped($markupEscaped)
{
$this->markupEscaped = $markupEscaped;
return $this;
}
protected $markupEscaped;
public function setUrlsLinked($urlsLinked)
{
$this->urlsLinked = $urlsLinked;
return $this;
}
protected $urlsLinked = true;
public function setSafeMode($safeMode)
{
$this->safeMode = (bool) $safeMode;
return $this;
}
protected $safeMode;
public function setStrictMode($strictMode)
{
$this->strictMode = (bool) $strictMode;
return $this;
}
protected $strictMode;
protected $safeLinksWhitelist = array(
'http://',
'https://',
'ftp://',
'ftps://',
'mailto:',
'tel:',
'data:image/png;base64,',
'data:image/gif;base64,',
'data:image/jpeg;base64,',
'irc:',
'ircs:',
'git:',
'ssh:',
'news:',
'steam:',
);
#
# Lines
#
protected $BlockTypes = array(
'#' => array('Header'),
'*' => array('Rule', 'List'),
'+' => array('List'),
'-' => array('SetextHeader', 'Table', 'Rule', 'List'),
'0' => array('List'),
'1' => array('List'),
'2' => array('List'),
'3' => array('List'),
'4' => array('List'),
'5' => array('List'),
'6' => array('List'),
'7' => array('List'),
'8' => array('List'),
'9' => array('List'),
':' => array('Table'),
'<' => array('Comment', 'Markup'),
'=' => array('SetextHeader'),
'>' => array('Quote'),
'[' => array('Reference'),
'_' => array('Rule'),
'`' => array('FencedCode'),
'|' => array('Table'),
'~' => array('FencedCode'),
);
# ~
protected $unmarkedBlockTypes = array(
'Code',
);
#
# Blocks
#
protected function lines(array $lines)
{
return $this->elements($this->linesElements($lines));
}
protected function linesElements(array $lines)
{
$Elements = array();
$CurrentBlock = null;
foreach ($lines as $line) {
if (chop($line) === '') {
if (isset($CurrentBlock)) {
$CurrentBlock['interrupted'] = (isset($CurrentBlock['interrupted'])
? $CurrentBlock['interrupted'] + 1 : 1
);
}
continue;
}
while (($beforeTab = strstr($line, "\t", true)) !== false) {
$shortage = 4 - mb_strlen($beforeTab, 'utf-8') % 4;
$line = $beforeTab
. str_repeat(' ', $shortage)
. substr($line, strlen($beforeTab) + 1)
;
}
$indent = strspn($line, ' ');
$text = $indent > 0 ? substr($line, $indent) : $line;
# ~
$Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
# ~
if (isset($CurrentBlock['continuable'])) {
$methodName = 'block' . $CurrentBlock['type'] . 'Continue';
$Block = $this->$methodName($Line, $CurrentBlock);
if (isset($Block)) {
$CurrentBlock = $Block;
continue;
} else {
if ($this->isBlockCompletable($CurrentBlock['type'])) {
$methodName = 'block' . $CurrentBlock['type'] . 'Complete';
$CurrentBlock = $this->$methodName($CurrentBlock);
}
}
}
# ~
$marker = $text[0];
# ~
$blockTypes = $this->unmarkedBlockTypes;
if (isset($this->BlockTypes[$marker])) {
foreach ($this->BlockTypes[$marker] as $blockType) {
$blockTypes[] = $blockType;
}
}
#
# ~
foreach ($blockTypes as $blockType) {
$Block = $this->{"block$blockType"}($Line, $CurrentBlock);
if (isset($Block)) {
$Block['type'] = $blockType;
if (!isset($Block['identified'])) {
if (isset($CurrentBlock)) {
$Elements[] = $this->extractElement($CurrentBlock);
}
$Block['identified'] = true;
}
if ($this->isBlockContinuable($blockType)) {
$Block['continuable'] = true;
}
$CurrentBlock = $Block;
continue 2;
}
}
# ~
if (isset($CurrentBlock) and $CurrentBlock['type'] === 'Paragraph') {
$Block = $this->paragraphContinue($Line, $CurrentBlock);
}
if (isset($Block)) {
$CurrentBlock = $Block;
} else {
if (isset($CurrentBlock)) {
$Elements[] = $this->extractElement($CurrentBlock);
}
$CurrentBlock = $this->paragraph($Line);
$CurrentBlock['identified'] = true;
}
}
# ~
if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type'])) {
$methodName = 'block' . $CurrentBlock['type'] . 'Complete';
$CurrentBlock = $this->$methodName($CurrentBlock);
}
# ~
if (isset($CurrentBlock)) {
$Elements[] = $this->extractElement($CurrentBlock);
}
# ~
return $Elements;
}
protected function extractElement(array $Component)
{
if (!isset($Component['element'])) {
if (isset($Component['markup'])) {
$Component['element'] = array('rawHtml' => $Component['markup']);
} elseif (isset($Component['hidden'])) {
$Component['element'] = array();
}
}
return $Component['element'];
}
protected function isBlockContinuable($Type)
{
return method_exists($this, 'block' . $Type . 'Continue');
}
protected function isBlockCompletable($Type)
{
return method_exists($this, 'block' . $Type . 'Complete');
}
#
# Code
protected function blockCode($Line, $Block = null)
{
if (isset($Block) and $Block['type'] === 'Paragraph' and !isset($Block['interrupted'])) {
return;
}
if ($Line['indent'] >= 4) {
$text = substr($Line['body'], 4);
$Block = array(
'element' => array(
'name' => 'pre',
'element' => array(
'name' => 'code',
'text' => $text,
),
),
);
return $Block;
}
}
protected function blockCodeContinue($Line, $Block)
{
if ($Line['indent'] >= 4) {
if (isset($Block['interrupted'])) {
$Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']);
unset($Block['interrupted']);
}
$Block['element']['element']['text'] .= "\n";
$text = substr($Line['body'], 4);
$Block['element']['element']['text'] .= $text;
return $Block;
}
}
protected function blockCodeComplete($Block)
{
return $Block;
}
#
# Comment
protected function blockComment($Line)
{
if ($this->markupEscaped or $this->safeMode) {
return;
}
if (strpos($Line['text'], '<!--') === 0) {
$Block = array(
'element' => array(
'rawHtml' => $Line['body'],
'autobreak' => true,
),
);
if (strpos($Line['text'], '-->') !== false) {
$Block['closed'] = true;
}
return $Block;
}
}
protected function blockCommentContinue($Line, array $Block)
{
if (isset($Block['closed'])) {
return;
}
$Block['element']['rawHtml'] .= "\n" . $Line['body'];
if (strpos($Line['text'], '-->') !== false) {
$Block['closed'] = true;
}
return $Block;
}
#
# Fenced Code
protected function blockFencedCode($Line)
{
$marker = $Line['text'][0];
$openerLength = strspn($Line['text'], $marker);
if ($openerLength < 3) {
return;
}
$infostring = trim(substr($Line['text'], $openerLength), "\t ");
if (strpos($infostring, '`') !== false) {
return;
}
$Element = array(
'name' => 'code',
'text' => '',
);
if ($infostring !== '') {
/**
* https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes
* Every HTML element may have a class attribute specified.
* The attribute, if specified, must have a value that is a set
* of space-separated tokens representing the various classes
* that the element belongs to.
* [...]
* The space characters, for the purposes of this specification,
* are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab),
* U+000A LINE FEED (LF), U+000C FORM FEED (FF), and
* U+000D CARRIAGE RETURN (CR).
*/
$language = substr($infostring, 0, strcspn($infostring, " \t\n\f\r"));
$Element['attributes'] = array('class' => "language-$language");
}
$Block = array(
'char' => $marker,
'openerLength' => $openerLength,
'element' => array(
'name' => 'pre',
'element' => $Element,
),
);
return $Block;
}
protected function blockFencedCodeContinue($Line, $Block)
{
if (isset($Block['complete'])) {
return;
}
if (isset($Block['interrupted'])) {
$Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']);
unset($Block['interrupted']);
}
if (($len = strspn($Line['text'], $Block['char'])) >= $Block['openerLength']
and chop(substr($Line['text'], $len), ' ') === ''
) {
$Block['element']['element']['text'] = substr($Block['element']['element']['text'], 1);
$Block['complete'] = true;
return $Block;
}
$Block['element']['element']['text'] .= "\n" . $Line['body'];
return $Block;
}
protected function blockFencedCodeComplete($Block)
{
return $Block;
}
#
# Header
protected function blockHeader($Line)
{
$level = strspn($Line['text'], '#');
if ($level > 6) {
return;
}
$text = trim($Line['text'], '#');
if ($this->strictMode and isset($text[0]) and $text[0] !== ' ') {
return;
}
$text = trim($text, ' ');
$Block = array(
'element' => array(
'name' => 'h' . $level,
'handler' => array(
'function' => 'lineElements',
'argument' => $text,
'destination' => 'elements',
),
),
);
return $Block;
}
#
# List
protected function blockList($Line, array $CurrentBlock = null)
{
list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]{1,9}+[.\)]');
if (preg_match('/^(' . $pattern . '([ ]++|$))(.*+)/', $Line['text'], $matches)) {
$contentIndent = strlen($matches[2]);
if ($contentIndent >= 5) {
$contentIndent -= 1;
$matches[1] = substr($matches[1], 0, -$contentIndent);
$matches[3] = str_repeat(' ', $contentIndent) . $matches[3];
} elseif ($contentIndent === 0) {
$matches[1] .= ' ';
}
$markerWithoutWhitespace = strstr($matches[1], ' ', true);
$Block = array(
'indent' => $Line['indent'],
'pattern' => $pattern,
'data' => array(
'type' => $name,
'marker' => $matches[1],
'markerType' => ($name === 'ul' ? $markerWithoutWhitespace : substr($markerWithoutWhitespace, -1)),
),
'element' => array(
'name' => $name,
'elements' => array(),
),
);
$Block['data']['markerTypeRegex'] = preg_quote($Block['data']['markerType'], '/');
if ($name === 'ol') {
$listStart = ltrim(strstr($matches[1], $Block['data']['markerType'], true), '0') ?: '0';
if ($listStart !== '1') {
if (
isset($CurrentBlock)
and $CurrentBlock['type'] === 'Paragraph'
and !isset($CurrentBlock['interrupted'])
) {
return;
}
$Block['element']['attributes'] = array('start' => $listStart);
}
}
$Block['li'] = array(
'name' => 'li',
'handler' => array(
'function' => 'li',
'argument' => !empty($matches[3]) ? array($matches[3]) : array(),
'destination' => 'elements',
),
);
$Block['element']['elements'][] = &$Block['li'];
return $Block;
}
}
protected function blockListContinue($Line, array $Block)
{
if (isset($Block['interrupted']) and empty($Block['li']['handler']['argument'])) {
return null;
}
$requiredIndent = ($Block['indent'] + strlen($Block['data']['marker']));
if ($Line['indent'] < $requiredIndent
and (
(
$Block['data']['type'] === 'ol'
and preg_match('/^[0-9]++' . $Block['data']['markerTypeRegex'] . '(?:[ ]++(.*)|$)/', $Line['text'], $matches)
) or (
$Block['data']['type'] === 'ul'
and preg_match('/^' . $Block['data']['markerTypeRegex'] . '(?:[ ]++(.*)|$)/', $Line['text'], $matches)
)
)
) {
if (isset($Block['interrupted'])) {
$Block['li']['handler']['argument'][] = '';
$Block['loose'] = true;
unset($Block['interrupted']);
}
unset($Block['li']);
$text = isset($matches[1]) ? $matches[1] : '';
$Block['indent'] = $Line['indent'];
$Block['li'] = array(
'name' => 'li',
'handler' => array(
'function' => 'li',
'argument' => array($text),
'destination' => 'elements',
),
);
$Block['element']['elements'][] = &$Block['li'];
return $Block;
} elseif ($Line['indent'] < $requiredIndent and $this->blockList($Line)) {
return null;
}
if ($Line['text'][0] === '[' and $this->blockReference($Line)) {
return $Block;
}
if ($Line['indent'] >= $requiredIndent) {
if (isset($Block['interrupted'])) {
$Block['li']['handler']['argument'][] = '';
$Block['loose'] = true;
unset($Block['interrupted']);
}
$text = substr($Line['body'], $requiredIndent);
$Block['li']['handler']['argument'][] = $text;
return $Block;
}
if (!isset($Block['interrupted'])) {
$text = preg_replace('/^[ ]{0,' . $requiredIndent . '}+/', '', $Line['body']);
$Block['li']['handler']['argument'][] = $text;
return $Block;
}
}
protected function blockListComplete(array $Block)
{
if (isset($Block['loose'])) {
foreach ($Block['element']['elements'] as &$li) {
if (end($li['handler']['argument']) !== '') {
$li['handler']['argument'][] = '';
}
}
}
return $Block;
}
#
# Quote
protected function blockQuote($Line)
{
if (preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches)) {
$Block = array(
'element' => array(
'name' => 'blockquote',
'handler' => array(
'function' => 'linesElements',
'argument' => (array) $matches[1],
'destination' => 'elements',
),
),
);
return $Block;
}
}
protected function blockQuoteContinue($Line, array $Block)
{
if (isset($Block['interrupted'])) {
return;
}
if ($Line['text'][0] === '>' and preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches)) {
$Block['element']['handler']['argument'][] = $matches[1];
return $Block;
}
if (!isset($Block['interrupted'])) {
$Block['element']['handler']['argument'][] = $Line['text'];
return $Block;
}
}
#
# Rule
protected function blockRule($Line)
{
$marker = $Line['text'][0];
if (substr_count($Line['text'], $marker) >= 3 and chop($Line['text'], " $marker") === '') {
$Block = array(
'element' => array(
'name' => 'hr',
),
);
return $Block;
}
}
#
# Setext
protected function blockSetextHeader($Line, array $Block = null)
{
if (!isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted'])) {
return;
}
if ($Line['indent'] < 4 and chop(chop($Line['text'], ' '), $Line['text'][0]) === '') {
$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
return $Block;
}
}
#
# Markup
protected function blockMarkup($Line)
{
if ($this->markupEscaped or $this->safeMode) {
return;
}
if (preg_match('/^<[\/]?+(\w*)(?:[ ]*+' . $this->regexHtmlAttribute . ')*+[ ]*+(\/)?>/', $Line['text'], $matches)) {
$element = strtolower($matches[1]);
if (in_array($element, $this->textLevelElements)) {
return;
}
$Block = array(
'name' => $matches[1],
'element' => array(
'rawHtml' => $Line['text'],
'autobreak' => true,
),
);
return $Block;
}
}
protected function blockMarkupContinue($Line, array $Block)
{
if (isset($Block['closed']) or isset($Block['interrupted'])) {
return;
}
$Block['element']['rawHtml'] .= "\n" . $Line['body'];
return $Block;
}
#
# Reference
protected function blockReference($Line)
{
if (strpos($Line['text'], ']') !== false
and preg_match('/^\[(.+?)\]:[ ]*+<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*+$/', $Line['text'], $matches)
) {
$id = strtolower($matches[1]);
$Data = array(
'url' => $matches[2],
'title' => isset($matches[3]) ? $matches[3] : null,
);
$this->DefinitionData['Reference'][$id] = $Data;
$Block = array(
'element' => array(),
);
return $Block;
}
}
#
# Table
protected function blockTable($Line, array $Block = null)
{
if (!isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted'])) {
return;
}
if (
strpos($Block['element']['handler']['argument'], '|') === false
and strpos($Line['text'], '|') === false
and strpos($Line['text'], ':') === false
or strpos($Block['element']['handler']['argument'], "\n") !== false
) {
return;
}
if (chop($Line['text'], ' -:|') !== '') {
return;
}
$alignments = array();
$divider = $Line['text'];
$divider = trim($divider);
$divider = trim($divider, '|');
$dividerCells = explode('|', $divider);
foreach ($dividerCells as $dividerCell) {
$dividerCell = trim($dividerCell);
if ($dividerCell === '') {
return;
}
$alignment = null;
if ($dividerCell[0] === ':') {
$alignment = 'left';
}
if (substr($dividerCell, -1) === ':') {
$alignment = $alignment === 'left' ? 'center' : 'right';