From 9999e05660637c77947c71656d2f03d841e19ab9 Mon Sep 17 00:00:00 2001
From: Piotr Filiciak <piotr@filiciak.pl>
Date: Fri, 20 May 2016 18:16:44 +0200
Subject: Http Range requests support in downloads

Http range requests support is required for video preview
---
 lib/private/Files/View.php | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'lib/private/Files/View.php')

diff --git a/lib/private/Files/View.php b/lib/private/Files/View.php
index 22e53a00706..136b2c2ac34 100644
--- a/lib/private/Files/View.php
+++ b/lib/private/Files/View.php
@@ -53,6 +53,7 @@ use OCP\Files\InvalidCharacterInPathException;
 use OCP\Files\InvalidPathException;
 use OCP\Files\NotFoundException;
 use OCP\Files\ReservedWordException;
+use OCP\Files\UnseekableException;
 use OCP\Files\Storage\ILockingStorage;
 use OCP\IUser;
 use OCP\Lock\ILockingProvider;
@@ -423,6 +424,39 @@ class View {
 		return false;
 	}
 
+	/**
+	 * @param string $path
+	 * @param int $from 
+	 * @param int $to
+	 * @return bool|mixed
+	 * @throws \OCP\Files\InvalidPathException, \OCP\Files\UnseekableException
+	 */
+	public function readfilePart($path, $from, $to) {
+		$this->assertPathLength($path);
+		@ob_end_clean();
+		$handle = $this->fopen($path, 'rb');
+		if ($handle) {
+			if (fseek($handle, $from) === 0) {
+			    $chunkSize = 8192; // 8 kB chunks
+			    $end = $to + 1;
+			    while (!feof($handle) && ftell($handle) < $end) {
+				$len = $end-ftell($handle);
+				if ($len > $chunkSize) { 
+				    $len = $chunkSize; 
+				}
+				echo fread($handle, $len);
+				flush();
+			    }
+			    $size = ftell($handle) - $from;
+			    return $size;
+			}
+			else {
+			    throw new \OCP\Files\UnseekableException('fseek error');
+			}
+		}
+		return false;
+	}
+
 	/**
 	 * @param string $path
 	 * @return mixed
-- 
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