diff options
Diffstat (limited to 'application/helpers/filebin_helper.php')
| -rw-r--r-- | application/helpers/filebin_helper.php | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/application/helpers/filebin_helper.php b/application/helpers/filebin_helper.php new file mode 100644 index 000000000..bed696c8c --- /dev/null +++ b/application/helpers/filebin_helper.php @@ -0,0 +1,374 @@ +<?php + +function format_bytes($size) +{ + $suffixes = array('B', 'KiB', 'MiB', 'GiB', 'TiB' , 'PiB' , 'EiB', 'ZiB', 'YiB'); + $boundary = 2048.0; + + for ($suffix_pos = 0; $suffix_pos + 1 < count($suffixes); $suffix_pos++) { + if ($size <= $boundary && $size >= -$boundary) { + break; + } + $size /= 1024.0; + } + + # don't print decimals for bytes + if ($suffix_pos != 0) { + return sprintf("%.2f%s", $size, $suffixes[$suffix_pos]); + } else { + return sprintf("%.0f%s", $size, $suffixes[$suffix_pos]); + } +} + +// Original source: http://www.phpfreaks.com/forums/index.php?topic=198274.msg895468#msg895468 +function rangeDownload($file, $filename, $type) +{ + $fp = @fopen($file, 'r'); + + $size = filesize($file); // File size + $length = $size; // Content length + $start = 0; // Start byte + $end = $size - 1; // End byte + // Now that we've gotten so far without errors we send the accept range header + /* At the moment we only support single ranges. + * Multiple ranges requires some more work to ensure it works correctly + * and comply with the spesifications: http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2 + * + * Multirange support annouces itself with: + * header('Accept-Ranges: bytes'); + * + * Multirange content must be sent with multipart/byteranges mediatype, + * (mediatype = mimetype) + * as well as a boundry header to indicate the various chunks of data. + */ + header("Accept-Ranges: 0-$length"); + // header('Accept-Ranges: bytes'); + // multipart/byteranges + // http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2 + if (isset($_SERVER['HTTP_RANGE'])) + { + $c_start = $start; + $c_end = $end; + // Extract the range string + list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2); + // Make sure the client hasn't sent us a multibyte range + if (strpos($range, ',') !== false) + { + // (?) Shoud this be issued here, or should the first + // range be used? Or should the header be ignored and + // we output the whole content? + header('HTTP/1.1 416 Requested Range Not Satisfiable'); + header("Content-Range: bytes $start-$end/$size"); + // (?) Echo some info to the client? + exit; + } + // If the range starts with an '-' we start from the beginning + // If not, we forward the file pointer + // And make sure to get the end byte if spesified + if ($range{0} == '-') + { + // The n-number of the last bytes is requested + $c_start = $size - substr($range, 1); + } + else + { + $range = explode('-', $range); + $c_start = $range[0]; + $c_end = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $size; + } + /* Check the range and make sure it's treated according to the specs. + * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html + */ + // End bytes can not be larger than $end. + $c_end = ($c_end > $end) ? $end : $c_end; + // Validate the requested range and return an error if it's not correct. + if ($c_start > $c_end || $c_start > $size - 1 || $c_end >= $size) + { + header('HTTP/1.1 416 Requested Range Not Satisfiable'); + header("Content-Range: bytes $start-$end/$size"); + // (?) Echo some info to the client? + exit; + } + $start = $c_start; + $end = $c_end; + $length = $end - $start + 1; // Calculate new content length + fseek($fp, $start); + header('HTTP/1.1 206 Partial Content'); + // Notify the client the byte range we'll be outputting + header("Content-Range: bytes $start-$end/$size"); + } + header("Content-Length: $length"); + header("Content-disposition: inline; filename=\"".$filename."\"\n"); + header("Content-Type: ".$type."\n"); + + // Start buffered download + $buffer = 1024 * 8; + while(!feof($fp) && ($p = ftell($fp)) <= $end) + { + if ($p + $buffer > $end) + { + // In case we're only outputtin a chunk, make sure we don't + // read past the length + $buffer = $end - $p + 1; + } + set_time_limit(0); // Reset time limit for big files + echo fread($fp, $buffer); + flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit. + } + + fclose($fp); +} + +function even_odd($reset = false) +{ + static $counter = 1; + + if ($reset) { + $counter = 1; + } + + if ($counter++%2 == 0) { + return 'even'; + } else { + return 'odd'; + } +} + +// Source: http://hu.php.net/manual/en/function.str-pad.php#71558 +// This is a multibyte enabled str_pad +function mb_str_pad($ps_input, $pn_pad_length, $ps_pad_string = " ", $pn_pad_type = STR_PAD_RIGHT, $ps_encoding = NULL) +{ + $ret = ""; + + if (is_null($ps_encoding)) + $ps_encoding = mb_internal_encoding(); + + $hn_length_of_padding = $pn_pad_length - mb_strlen($ps_input, $ps_encoding); + $hn_psLength = mb_strlen($ps_pad_string, $ps_encoding); // pad string length + + if ($hn_psLength <= 0 || $hn_length_of_padding <= 0) { + // Padding string equal to 0: + // + $ret = $ps_input; + } + else { + $hn_repeatCount = floor($hn_length_of_padding / $hn_psLength); // how many times repeat + + if ($pn_pad_type == STR_PAD_BOTH) { + $hs_lastStrLeft = ""; + $hs_lastStrRight = ""; + $hn_repeatCountLeft = $hn_repeatCountRight = ($hn_repeatCount - $hn_repeatCount % 2) / 2; + + $hs_lastStrLength = $hn_length_of_padding - 2 * $hn_repeatCountLeft * $hn_psLength; // the rest length to pad + $hs_lastStrLeftLength = $hs_lastStrRightLength = floor($hs_lastStrLength / 2); // the rest length divide to 2 parts + $hs_lastStrRightLength += $hs_lastStrLength % 2; // the last char add to right side + + $hs_lastStrLeft = mb_substr($ps_pad_string, 0, $hs_lastStrLeftLength, $ps_encoding); + $hs_lastStrRight = mb_substr($ps_pad_string, 0, $hs_lastStrRightLength, $ps_encoding); + + $ret = str_repeat($ps_pad_string, $hn_repeatCountLeft) . $hs_lastStrLeft; + $ret .= $ps_input; + $ret .= str_repeat($ps_pad_string, $hn_repeatCountRight) . $hs_lastStrRight; + } + else { + $hs_lastStr = mb_substr($ps_pad_string, 0, $hn_length_of_padding % $hn_psLength, $ps_encoding); // last part of pad string + + if ($pn_pad_type == STR_PAD_LEFT) + $ret = str_repeat($ps_pad_string, $hn_repeatCount) . $hs_lastStr . $ps_input; + else + $ret = $ps_input . str_repeat($ps_pad_string, $hn_repeatCount) . $hs_lastStr; + } + } + + return $ret; +} + +function is_cli_client($override = null) +{ + static $is_cli = null; + + if ($override !== null) { + $is_cli = $override; + } + + if ($is_cli === null) { + $is_cli = false; + // official client uses "fb-client/$version" as useragent + $clients = array("fb-client", "libcurl", "pyfb", "curl/"); + foreach ($clients as $client) { + if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], $client) !== false) { + $is_cli = true; + } + } + } + return $is_cli; +} + +function random_alphanum($min_length, $max_length = null) +{ + $random = ''; + $char_list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; + $char_list .= "abcdefghijklmnopqrstuvwxyz"; + $char_list .= "1234567890"; + + if ($max_length === null) { + $max_length = $min_length; + } + $length = mt_rand($min_length, $max_length); + + for($i = 0; $i < $max_length; $i++) { + if (strlen($random) == $length) break; + $random .= substr($char_list, mt_rand(0, strlen($char_list) - 1), 1); + } + return $random; +} + +function link_with_mtime($file) +{ + $link = base_url($file); + + if (file_exists(FCPATH.$file)) { + $link .= "?".filemtime(FCPATH.$file); + } + + return $link; +} + +function include_js($file) +{ + static $included = array(); + if (in_array($file, $included) || $file === null) { + return ""; + } + return "<script src=\"".link_with_mtime($file)."\"></script>\n"; +} + +// kind of hacky, but works well enough for now +function register_js_include($file, $return = false) +{ + static $list = ""; + $list .= include_js($file); + if ($return) { + return $list; + } +} + +function include_registered_js() +{ + return register_js_include(null, true); +} + +function handle_etag($etag) +{ + $etag = strtolower($etag); + $modified = true; + + if(isset($_SERVER['HTTP_IF_NONE_MATCH'])) { + $oldtag = trim(strtolower($_SERVER['HTTP_IF_NONE_MATCH']), '"'); + if($oldtag == $etag) { + $modified = false; + } else { + $modified = true; + } + } + + header('Etag: "'.$etag.'"'); + + if (!$modified) { + header("HTTP/1.1 304 Not Modified"); + exit(); + } +} + +// Reference: http://php.net/manual/en/features.file-upload.multiple.php#109437 +// This is a little different because we don't care about the fieldname +function getNormalizedFILES() +{ + $newfiles = array(); + $ret = array(); + + foreach($_FILES as $fieldname => $fieldvalue) + foreach($fieldvalue as $paramname => $paramvalue) + foreach((array)$paramvalue as $index => $value) + $newfiles[$fieldname][$index][$paramname] = $value; + + $i = 0; + foreach ($newfiles as $fieldname => $field) { + foreach ($field as $file) { + // skip empty fields + if ($file["error"] === 4) { + continue; + } + $ret[$i] = $file; + $ret[$i]["formfield"] = $fieldname; + $i++; + } + } + + return $ret; +} + +// Allow simple checking inside views +function auth_driver_function_implemented($function) +{ + static $result = array(); + if (isset($result[$function])) { + return $result[$function]; + } + + $CI =& get_instance(); + $CI->load->driver("duser"); + $result[$function] = $CI->duser->is_implemented($function);; + + return $result[$function]; +} + +function user_logged_in() +{ + $CI =& get_instance(); + $CI->load->model("muser"); + return $CI->muser->logged_in(); +} + +function send_json_reply($array, $status = "success") +{ + $reply = array(); + $reply["status"] = $status; + $reply["data"] = $array; + + $CI =& get_instance(); + $CI->output->set_content_type('application/json'); + $CI->output->set_output(json_encode($reply)); +} + +function static_storage($key, $value = null) +{ + static $storage = array(); + + if ($value !== null) { + $storage[$key] = $value; + } + + if (!isset($storage[$key])) { + $storage[$key] = null; + } + + return $storage[$key]; +} + +function stateful_client() +{ + $CI =& get_instance(); + + if ($CI->input->post("apikey")) { + return false; + } + + if (is_cli_client()) { + return false; + } + + return true; +} + +# vim: set noet: |