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-rw-r--r--application/helpers/filebin_helper.php109
1 files changed, 109 insertions, 0 deletions
diff --git a/application/helpers/filebin_helper.php b/application/helpers/filebin_helper.php
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index 000000000..bb265d6e5
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+++ b/application/helpers/filebin_helper.php
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+<?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);
+}
+
+# vim: set noet: