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<?php
include('config.php'); // contains DB & important versioning
include('blacklist.php'); // rules to *try* to prevent abuse of jsbin
$host = 'http://' . $_SERVER['HTTP_HOST'];
$pos = strpos($_SERVER['REQUEST_URI'], ROOT);
if ($pos !== false) $pos = strlen(ROOT);
$request_uri = substr($_SERVER['REQUEST_URI'], $pos);
$home = isset($_COOKIE['home']) ? $_COOKIE['home'] : '';
// if ($request_uri == '' && $home && stripos($_SERVER['HTTP_HOST'], $home . '/') !== 0) {
// header('Location: ' . HOST . $home . '/');
// exit;
// }
$request = split('/', preg_replace('/^\//', '', preg_replace('/\/$/', '', preg_replace('/\?.*$/', '', $request_uri ))));
$action = array_pop($request);
// remove the home path section from the request so we can correctly read the next action
if ($action == $home) {
$action = array_pop($request);
}
$quiet = false;
if ($action == 'quiet') {
$quiet = true;
$action = array_pop($request);
}
$edit_mode = true; // determines whether we should go ahead and load index.php
$code_id = '';
// if it contains the x-requested-with header, or is a CORS request on GET only
$ajax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) || (stripos($_SERVER['HTTP_ACCEPT'], 'application/json') !== false && $_SERVER['REQUEST_METHOD'] == 'GET');
$no_code_found = false;
// respond to preflights
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
// return only the headers and not the content
// only allow CORS if we're doing a GET - i.e. no saving for now.
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']) && $_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD'] == 'GET') {
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Headers: X-Requested-With');
}
exit;
} else if ($ajax) {
header('Access-Control-Allow-Origin: *');
}
// doesn't require a connection when we're landing for the first time
if ($action) {
connect();
}
if (!$action) {
// do nothing and serve up the page
} else if ($action == 'sethome') {
if ($ajax) {
// 1. encode the key
// 2. lookup the name
// 3.1. if no name - it's available - store
// 3.2. if name - check key against encoded key
// 3.2.1. if match, return ok
// else return fail
$key = sha1($_POST['key']);
$name = $_POST['name'];
$sql = sprintf('select * from ownership where name="%s"', mysql_real_escape_string($name));
$result = mysql_query($sql);
header('content-type: application/json');
if (!mysql_num_rows($result)) {
// store and okay (note "key" is a reserved word - typical!)
$sql = sprintf('insert into ownership (name, `key`) values ("%s", "%s")', mysql_real_escape_string($name), mysql_real_escape_string($key));
$ok = mysql_query($sql);
if ($ok) {
echo json_encode(array('ok' => true, 'key' => $key, 'created' => true));
} else {
echo json_encode(array('ok' => false, 'error' => mysql_error()));
}
} else {
// check key
$row = mysql_fetch_object($result);
if ($row->key == $key) {
echo json_encode(array('ok' => true, 'key' => $key, 'created' => false));
} else {
echo json_encode(array('ok' => false));
}
}
exit;
}
} else if ($action == 'list' || $action == 'show') {
showSaved($request[0] ? $request[0] : $home);
// could be listed under a user OR could be listing all the revisions for a particular bin
exit();
} else if ($action == 'source' || $action == 'js') {
header('Content-type: text/javascript');
list($code_id, $revision) = getCodeIdParams($request);
$edit_mode = false;
if ($code_id) {
list($latest_revision, $html, $javascript) = getCode($code_id, $revision);
} else {
list($latest_revision, $html, $javascript) = defaultCode();
}
if ($action == 'js') {
echo $javascript;
} else {
$url = $host . ROOT . $code_id . ($revision == 1 ? '' : '/' . $revision);
if (!$ajax) {
echo 'var template = ';
}
// doubles as JSON
echo '{"url":"' . $url . '","html" : ' . encode($html) . ',"javascript":' . encode($javascript) . '}';
}
} else if ($action == 'edit') {
list($code_id, $revision) = getCodeIdParams($request);
if ($revision == 'latest') {
$latest_revision = getMaxRevision($code_id);
header('Location: /' . $code_id . '/' . $latest_revision . '/edit');
$edit_mode = false;
}
} else if ($action == 'save' || $action == 'clone') {
list($code_id, $revision) = getCodeIdParams($request);
$javascript = @$_POST['javascript'];
$html = @$_POST['html'];
$method = @$_POST['method'];
$stream = isset($_POST['stream']) ? true : false;
$streaming_key = '';
if ($stream && isset($_COOKIE['streaming_key'])) {
$streaming_key = $_COOKIE['streaming_key'];
// validate streaming key
// requires:
// 1. code_id
// 2. revision || 1
// 3. If all this info is valid, to an update instead of an
// insert, and update the created timestamp which should
// trigger any long polling to fire and update any live
// views
}
// we're using stripos instead of == 'save' because the method *can* be "download,save" to support doing both
if (stripos($method, 'save') !== false) {
if (stripos($method, 'new') !== false) {
$code_id = false;
}
if (!$code_id) {
$code_id = generateCodeId();
$revision = 1;
} else {
$revision = getMaxRevision($code_id);
$revision++;
}
$sql = sprintf('insert into sandbox (javascript, html, created, last_viewed, url, revision) values ("%s", "%s", now(), now(), "%s", "%s")', mysql_real_escape_string($javascript), mysql_real_escape_string($html), mysql_real_escape_string($code_id), mysql_real_escape_string($revision));
// a few simple tests to pass before we save
if (($html == '' && $html == $javascript)) {
// entirely blank isn't going to be saved.
} else {
if (!noinsert($html, $javascript)) {
$ok = mysql_query($sql);
if ($home) {
// first check they have write permission for this home
$sql = sprintf('select * from ownership where name="%s" and `key`="%s"', mysql_real_escape_string($home), mysql_real_escape_string($_COOKIE['key']));
$result = mysql_query($sql);
if (mysql_num_rows($result) == 1) {
$sql = sprintf('insert into owners (name, url, revision) values ("%s", "%s", "%s")', mysql_real_escape_string($home), mysql_real_escape_string($code_id), mysql_real_escape_string($revision));
$ok = mysql_query($sql);
}
// $code_id = $home . '/' . $code_id;
}
}
}
// error_log('saved: ' . $code_id . ' - ' . $revision . ' -- ' . $ok . ' ' . strlen($sql));
// error_log(mysql_error());
}
/**
* Download
*
* Now allow the user to download the individual bin.
* TODO allow users to download *all* their bins.
**/
if (stripos($method, 'download') !== false) {
// strip escaping (replicated from getCode method):
$javascript = preg_replace('/\r/', '', $javascript);
$html = preg_replace('/\r/', '', $html);
$html = get_magic_quotes_gpc() ? stripslashes($html) : $html;
$javascript = get_magic_quotes_gpc() ? stripslashes($javascript) : $javascript;
if (!$code_id) {
$code_id = 'untitled';
$revision = 1;
}
}
// If they're saving via an XHR request, then second back JSON or JSONP response
if ($ajax) {
// supports plugins making use of JS Bin via ajax calls and callbacks
if (array_key_exists('callback', $_REQUEST)) {
echo $_REQUEST['callback'] . '("';
}
$url = $host . ROOT . $code_id . ($revision == 1 ? '' : '/' . $revision);
if (isset($_REQUEST['format']) && strtolower($_REQUEST['format']) == 'plain') {
echo $url;
} else {
echo '{ "code": "' . $code_id . '", "revision": ' . $revision . ', "url" : "' . $url . '", "edit" : "' . $url . '/edit", "html" : "' . $url . '/edit", "js" : "' . $url . '/edit" }';
}
if (array_key_exists('callback', $_REQUEST)) {
echo '")';
}
} else if (stripos($method, 'download') !== false) {
// actually go ahead and send a file to prompt the browser to download
$originalHTML = $html;
list($html, $javascript) = formatCompletedCode($html, $javascript, $code_id, $revision);
$ext = $originalHTML ? '.html' : '.js';
header('Content-Disposition: attachment; filename="' . $code_id . ($revision == 1 ? '' : '.' . $revision) . $ext . '"');
echo $originalHTML ? $html : $javascript;
exit;
} else {
// code was saved, so lets do a location redirect to the newly saved code
$edit_mode = false;
if ($revision == 1) {
header('Location: ' . ROOT . $code_id . '/edit');
} else {
header('Location: ' . ROOT . $code_id . '/' . $revision . '/edit');
}
}
} else if ($action) { // this should be an id
$subaction = array_pop($request);
if ($action == 'latest') {
// find the latest revision and redirect to that.
$code_id = $subaction;
$latest_revision = getMaxRevision($code_id);
// header('Location: /' . $code_id . '/' . $latest_revision);
$edit_mode = false;
}
// gist are formed as jsbin.com/gist/1234 - which land on this condition, so we need to jump out, just in case
else if ($subaction != 'gist') {
if ($subaction && is_numeric($action)) {
$code_id = $subaction;
$revision = $action;
} else {
$code_id = $action;
$revision = 1;
}
list($latest_revision, $html, $javascript) = getCode($code_id, $revision);
list($html, $javascript) = formatCompletedCode($html, $javascript, $code_id, $revision);
global $quiet;
// using new str_lreplace to ensure only the *last* </body> is replaced.
// FIXME there's still a bug here if </body> appears in the script and not in the
// markup - but I'll fix that later
if (!$quiet) {
$html = str_lreplace('</body>', '<script src="/js/render/edit.js"></script>' . "\n</body>", $html);
}
if ($no_code_found == false) {
$html = str_lreplace('</body>', googleAnalytics() . '</body>', $html);
}
if (false) {
if (stripos($html, '<head>')) {
$html = preg_replace('/<head>(.*)/', '<head><script>if (window.top != window.self) window.top.location.replace(window.location.href);</script>$1', $html);
} else {
// if we can't find a head element, brute force the framebusting in to the HTML
$html = '<script>if (window.top != window.self) window.top.location.replace(window.location.href);</script>' . $html;
}
}
if (!$html && !$ajax) {
$javascript = "/*\n Created using " . $host . ROOT . "\n Source can be edit via " . $host . ROOT . "$code_id/edit\n*/\n\n" . $javascript;
}
if (!$html) {
header("Content-type: text/javascript");
}
echo $html ? $html : $javascript;
$edit_mode = false;
}
}
if (!$edit_mode || $ajax) {
exit;
}
function connect() {
// sniff, and if on my mac...
$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
mysql_select_db(DB_NAME, $link);
}
function encode($s) {
static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $s) . '"';
}
function str_lreplace($search, $replace, $subject) {
$pos = strrpos($subject, $search);
if ($pos === false) {
return $subject;
} else {
return substr_replace($subject, $replace, $pos, strlen($search));
}
}
function getCodeIdParams($request) {
global $home;
$revision = array_pop($request);
$code_id = array_pop($request);
if ($code_id == null || ($home && $home == $code_id)) {
$code_id = $revision;
$revision = 1;
}
return array($code_id, $revision);
}
function getMaxRevision($code_id) {
$sql = sprintf('select max(revision) as rev from sandbox where url="%s"', mysql_real_escape_string($code_id));
$result = mysql_query($sql);
$row = mysql_fetch_object($result);
return $row->rev ? $row->rev : 0;
}
function formatCompletedCode($html, $javascript, $code_id, $revision) {
global $ajax, $quiet;
$javascript = preg_replace('@</script@', "<\/script", $javascript);
if ($quiet && $html) {
$html = '<script>window.print=window.confirm=window.prompt=window.alert=function(){};</script>' . $html;
}
if ($html && stripos($html, '%code%') === false && strlen($javascript)) {
$close = '';
if (stripos($html, '</body>') !== false) {
$parts = explode("</body>", $html);
$html = $parts[0];
$close = count($parts) == 2 ? '</body>' . $parts[1] : '';
}
$html .= "<script>\n" . $javascript . "\n</script>\n" . $close;
} else if ($javascript) {
// removed the regex completely to try to protect $n variables in JavaScript
$htmlParts = explode("%code%", $html);
$html = $htmlParts[0] . $javascript . $htmlParts[1];
$html = preg_replace("/%code%/", $javascript, $html);
}
if (!$ajax && $code_id != 'jsbin') {
$code_id .= $revision == 1 ? '' : '/' . $revision;
$html = preg_replace('/<html(.*)/', "<html$1\n<!--\n\n Created using " . $host . ROOT . "\n Source can be edited via " . $host . ROOT . "$code_id/edit\n\n-->", $html);
}
return array($html, $javascript);
}
function getCode($code_id, $revision, $testonly = false) {
$sql = sprintf('select * from sandbox where url="%s" and revision="%s"', mysql_real_escape_string($code_id), mysql_real_escape_string($revision));
$result = mysql_query($sql);
if (!mysql_num_rows($result) && $testonly == false) {
header("HTTP/1.0 404 Not Found");
return defaultCode(true);
} else if (!mysql_num_rows($result)) {
return array($revision);
} else {
$row = mysql_fetch_object($result);
// TODO required anymore? used for auto deletion
$sql = 'update sandbox set last_viewed=now() where id=' . $row->id;
mysql_query($sql);
$javascript = preg_replace('/\r/', '', $row->javascript);
$html = preg_replace('/\r/', '', $row->html);
$revision = $row->revision;
// return array(preg_replace('/\r/', '', $html), preg_replace('/\r/', '', $javascript), $row->streaming, $row->active_tab, $row->active_cursor);
return array($revision, get_magic_quotes_gpc() ? stripslashes($html) : $html, get_magic_quotes_gpc() ? stripslashes($javascript) : $javascript, $row->streaming, $row->active_tab, $row->active_cursor);
}
}
function defaultCode($not_found = false) {
$library = '';
global $no_code_found;
if ($not_found) {
$no_code_found = true;
}
$usingRequest = false;
if (isset($_REQUEST['html']) || isset($_REQUEST['js'])) {
$usingRequest = true;
}
if (@$_REQUEST['html']) {
$html = $_REQUEST['html'];
} else if ($usingRequest) {
$html = '';
} else {
$html = <<<HERE_DOC
<!DOCTYPE html>
<html>
<head>
<title>CreativeJS graphics playground</title>
<style>
canvas { border : 1px lightgray solid; }
body { margin :0; }
</style>
</head>
<body>
<script src="/js/creativejs.js"></script>
<canvas id="creativejs" width='200' height='200'></canvas>
</body>
</html>
HERE_DOC;
}
$javascript = '';
if (@$_REQUEST['js']) {
$javascript = $_REQUEST['js'];
} else if (@$_REQUEST['javascript']) {
$javascript = $_REQUEST['javascript']; // it's beyond me why I ever used js?
} else if ($usingRequest) {
$javascript = "";
} else {
if ($not_found) {
$javascript = 'document.getElementById("hello").innerHTML = "<strong>This URL does not have any code saved to it.</strong>";';
} else {
$javascript = "var canvas = document.getElementById('creativejs'), \n c = canvas.getContext('2d');";
}
}
return array(0, get_magic_quotes_gpc() ? stripslashes($html) : $html, get_magic_quotes_gpc() ? stripslashes($javascript) : $javascript);
}
// I'd consider using a tinyurl type generator, but I've yet to find one.
// this method also produces *pronousable* urls
function generateCodeId($tries = 0) {
$code_id = generateURL();
if ($tries > 2) {
$code_id .= $tries;
}
// check if it's free
$sql = sprintf('select id from sandbox where url="%s"', mysql_real_escape_string($code_id));
$result = mysql_query($sql);
if (mysql_num_rows($result)) {
$code_id = generateCodeId(++$tries);
} else if ($tries > 10) {
echo('Too many tries to find a new code_id - please contact using <a href="/about">about</a>');
exit;
}
return $code_id;
}
function generateURL() {
// generates 5 char word
$vowels = str_split('aeiou');
$const = str_split('bcdfghjklmnpqrstvwxyz');
$word = '';
for ($i = 0; $i < 6; $i++) {
if ($i % 2 == 0) { // even = vowels
$word .= $vowels[rand(0, 4)];
} else {
$word .= $const[rand(0, 20)];
}
}
return $word;
}
function googleAnalytics() {
return <<<HERE_DOC
<script>var _gaq=[['_setAccount','UA-1656750-13'],['_trackPageview']];(function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];g.src='//www.google-analytics.com/ga.js';s.parentNode.insertBefore(g,s)})(document,'script')</script>
HERE_DOC;
}
function showSaved($name) {
$sql = sprintf('select * from owners where name="%s" order by url, revision desc', mysql_real_escape_string($name));
$result = mysql_query($sql);
$bins = array();
$order = array();
// this is lame, but the optimisation was aweful on the joined version - 3-4 second query
// with a full table scan - not good. I'm worried this doesn't scale properly, but I guess
// I could mitigate this with paging on the UI - just a little...?
while ($saved = mysql_fetch_object($result)) {
$sql = sprintf('select * from sandbox where url="%s" and revision="%s"', mysql_real_escape_string($saved->url), mysql_real_escape_string($saved->revision));
$binresult = mysql_query($sql);
$bin = mysql_fetch_array($binresult);
if (!isset($bins[$saved->url])) {
$bins[$saved->url] = array();
}
$bins[$saved->url][] = $bin;
if (isset($order[$saved->url])) {
if (@strtotime($order[$saved->url]) < @strtotime($bin['created'])) {
$order[$saved->url] = $bin['created'];
}
} else {
$order[$saved->url] = $bin['created'];
}
}
if (count($bins)) {
include_once('list-home-code.php');
} else {
echo 'nothing found :(';
}
}
function formatURL($code_id, $revision) {
if ($revision != 1 && $revision) {
$code_id .= '/' . $revision;
}
$code_id_path = ROOT;
if ($code_id) {
$code_id_path = ROOT . $code_id . '/';
}
return $code_id_path;
}
?>
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