diff options
Diffstat (limited to 'application/helpers/filebin_helper.php')
| -rw-r--r-- | application/helpers/filebin_helper.php | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/application/helpers/filebin_helper.php b/application/helpers/filebin_helper.php new file mode 100644 index 000000000..41960a3d6 --- /dev/null +++ b/application/helpers/filebin_helper.php @@ -0,0 +1,173 @@ +<?php + +// Source: http://ibnuyahya.com/format-bytes-to-kb-mb-gb/ +function format_bytes($size, $precision = 2){ + $base = log($size) / log(1024); + $suffixes = array('B', 'KiB', 'MiB', 'GiB', 'TiB' , 'PiB' , 'EiB'); + return round(pow(1024, $base - floor($base)), $precision) . $suffixes[floor($base)]; +} + +// 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; +} + +# vim: set noet: |