From ab23338fe9f1b3ed21455867f1c032d7b146ceb8 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Mon, 2 Mar 2015 16:51:04 +0100
Subject: Initial Commit
---
inc/util.inc.php | 289 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 289 insertions(+)
create mode 100644 inc/util.inc.php
(limited to 'inc/util.inc.php')
diff --git a/inc/util.inc.php b/inc/util.inc.php
new file mode 100644
index 0000000..4378a08
--- /dev/null
+++ b/inc/util.inc.php
@@ -0,0 +1,289 @@
+$2$3', $string);
+ $string = preg_replace('#(^|[\n \-\*/\.])_(.+?)_($|[ \-\*/\.\!\?,:])#is', '$1$2$3', $string);
+ $string = preg_replace('#(^|[\n \-_\*\.])/(.+?)/($|[ \-_\*\.\!\?,:])#is', '$1$2$3', $string);
+ return nl2br($string);
+ }
+
+ /**
+ * Convert given number to human readable file size string.
+ * Will append Bytes, KiB, etc. depending on magnitude of number.
+ *
+ * @param type $bytes numeric value of the filesize to make readable
+ * @param type $decimals number of decimals to show, -1 for automatic
+ * @return type human readable string representing the given filesize
+ */
+ public static function readableFileSize($bytes, $decimals = -1)
+ {
+ static $sz = array('Byte', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB');
+ $factor = floor((strlen($bytes) - 1) / 3);
+ if ($factor == 0) {
+ $decimals = 0;
+ } elseif ($decimals === -1) {
+ $decimals = 2 - floor((strlen($bytes) - 1) % 3);
+ }
+ return sprintf("%.{$decimals}f ", $bytes / pow(1024, $factor)) . $sz[$factor];
+ }
+
+ public static function sanitizeFilename($name)
+ {
+ return preg_replace('/[^a-zA-Z0-9_\-]+/', '_', $name);
+ }
+
+ public static function safePath($path, $prefix = '')
+ {
+ if (empty($path))
+ return false;
+ $path = trim($path);
+ if ($path{0} == '/' || preg_match('/[\x00-\x19\?\*]/', $path))
+ return false;
+ if (strpos($path, '..') !== false)
+ return false;
+ if (substr($path, 0, 2) !== './')
+ $path = "./$path";
+ if (empty($prefix))
+ return $path;
+ if (substr($prefix, 0, 2) !== './')
+ $prefix = "./$prefix";
+ if (substr($path, 0, strlen($prefix)) !== $prefix)
+ return false;
+ return $path;
+ }
+
+ /**
+ * Create human readable error description from a $_FILES[<..>]['error'] code
+ *
+ * @param int $code the code to turn into an error description
+ * @return string the error description
+ */
+ public static function uploadErrorString($code)
+ {
+ switch ($code) {
+ case UPLOAD_ERR_INI_SIZE:
+ $message = "The uploaded file exceeds the upload_max_filesize directive in php.ini";
+ break;
+ case UPLOAD_ERR_FORM_SIZE:
+ $message = "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form";
+ break;
+ case UPLOAD_ERR_PARTIAL:
+ $message = "The uploaded file was only partially uploaded";
+ break;
+ case UPLOAD_ERR_NO_FILE:
+ $message = "No file was uploaded";
+ break;
+ case UPLOAD_ERR_NO_TMP_DIR:
+ $message = "Missing a temporary folder";
+ break;
+ case UPLOAD_ERR_CANT_WRITE:
+ $message = "Failed to write file to disk";
+ break;
+ case UPLOAD_ERR_EXTENSION:
+ $message = "File upload stopped by extension";
+ break;
+
+ default:
+ $message = "Unknown upload error";
+ break;
+ }
+ return $message;
+ }
+
+ /**
+ * Is given string a public ipv4 address?
+ *
+ * @param string $ip_addr input to check
+ * @return boolean true iff $ip_addr is a valid public ipv4 address
+ */
+ public static function isPublicIpv4($ip_addr)
+ {
+ if (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $ip_addr))
+ return false;
+
+ $parts = explode(".", $ip_addr);
+ foreach ($parts as $part) {
+ if (!is_numeric($part) || $part > 255 || $part < 0)
+ return false;
+ }
+
+ if ($parts[0] == 0 || $parts[0] == 10 || $parts[0] == 127 || ($parts[0] > 223 && $parts[0] < 240))
+ return false;
+ if (($parts[0] == 192 && $parts[1] == 168) || ($parts[0] == 169 && $parts[1] == 254))
+ return false;
+ if ($parts[0] == 172 && $parts[1] > 15 && $parts[1] < 32)
+ return false;
+
+ return true;
+ }
+
+ /**
+ * Check whether $arrax contains all keys given in $keyList
+ * @param array $array An array
+ * @param array $keyList A list of strings which must all be valid keys in $array
+ * @return boolean
+ */
+ public static function hasAllKeys($array, $keyList)
+ {
+ if (!is_array($array))
+ return false;
+ foreach ($keyList as $key) {
+ if (!isset($array[$key]))
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Send a file to user for download.
+ *
+ * @param type $file path of local file
+ * @param type $name name of file to send to user agent
+ * @param type $delete delete the file when done?
+ * @return boolean false: file could not be opened.
+ * true: error while reading the file
+ * - on success, the function does not return
+ */
+ public static function sendFile($file, $name, $delete = false)
+ {
+ while ((@ob_get_level()) > 0)
+ @ob_end_clean();
+ $fh = @fopen($file, 'rb');
+ if ($fh === false) {
+ Message::addError('error-read', $file);
+ return false;
+ }
+ Header('Content-Type: application/octet-stream', true);
+ Header('Content-Disposition: attachment; filename=' . str_replace(array(' ', '=', ',', '/', '\\', ':', '?'), '_', iconv('UTF-8', 'ASCII//TRANSLIT', $name)));
+ Header('Content-Length: ' . @filesize($file));
+ while (!feof($fh)) {
+ $data = fread($fh, 16000);
+ if ($data === false) {
+ echo "\r\n\nDOWNLOAD INTERRUPTED!\n";
+ if ($delete)
+ @unlink($file);
+ return true;
+ }
+ echo $data;
+ @ob_flush();
+ @flush();
+ }
+ @fclose($fh);
+ if ($delete)
+ @unlink($file);
+ exit(0);
+ }
+
+}
--
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