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-rw-r--r--Zotlabs/Lib/Img_filesize.php122
1 files changed, 122 insertions, 0 deletions
diff --git a/Zotlabs/Lib/Img_filesize.php b/Zotlabs/Lib/Img_filesize.php
new file mode 100644
index 000000000..196697733
--- /dev/null
+++ b/Zotlabs/Lib/Img_filesize.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Zotlabs\Lib;
+
+class Img_filesize {
+
+ private $url;
+
+ function __construct($url) {
+ $this->url = $url;
+ }
+
+ function getSize() {
+ $size = null;
+
+ if(stripos($this->url,z_root() . '/photo') !== false) {
+ $size = self::getLocalFileSize($this->url);
+ }
+ if(! $size) {
+ $size = getRemoteFileSize($this->url);
+ }
+
+ return $size;
+ }
+
+
+ static function getLocalFileSize($url) {
+
+ $fname = basename($url);
+ $resolution = 0;
+
+ if(strpos($fname,'.') !== false)
+ $fname = substr($fname,0,strpos($fname,'.'));
+
+ if(substr($fname,-2,1) == '-') {
+ $resolution = intval(substr($fname,-1,1));
+ $fname = substr($fname,0,-2);
+ }
+
+ $r = q("SELECT filesize FROM photo WHERE resource_id = '%s' AND imgscale = %d LIMIT 1",
+ dbesc($fname),
+ intval($resolution)
+ );
+ if($r) {
+ return $r[0]['filesize'];
+ }
+ return null;
+ }
+
+}
+
+/**
+ * Try to determine the size of a remote file by making an HTTP request for
+ * a byte range, or look for the content-length header in the response.
+ * The function aborts the transfer as soon as the size is found, or if no
+ * length headers are returned, it aborts the transfer.
+ *
+ * @return int|null null if size could not be determined, or length of content
+ */
+function getRemoteFileSize($url)
+{
+ $ch = curl_init($url);
+
+ $headers = array(
+ 'Range: bytes=0-1',
+ 'Connection: close',
+ );
+
+ $in_headers = true;
+ $size = null;
+
+ curl_setopt($ch, CURLOPT_HEADER, 1);
+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+ curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2450.0 Iron/46.0.2450.0');
+ curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+ curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
+ curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+ curl_setopt($ch, CURLOPT_VERBOSE, 0); // set to 1 to debug
+ curl_setopt($ch, CURLOPT_STDERR, fopen('php://output', 'r'));
+
+ curl_setopt($ch, CURLOPT_HEADERFUNCTION, function($curl, $line) use (&$in_headers, &$size) {
+ $length = strlen($line);
+
+ if (trim($line) == '') {
+ $in_headers = false;
+ }
+
+ list($header, $content) = explode(':', $line, 2);
+ $header = strtolower(trim($header));
+
+ if ($header == 'content-range') {
+ // found a content-range header
+ list($rng, $s) = explode('/', $content, 2);
+ $size = (int)$s;
+ return 0; // aborts transfer
+ } else if ($header == 'content-length' && 206 != curl_getinfo($curl, CURLINFO_HTTP_CODE)) {
+ // found content-length header and this is not a 206 Partial Content response (range response)
+ $size = (int)$content;
+ return 0;
+ } else {
+ // continue
+ return $length;
+ }
+ });
+
+ curl_setopt($ch, CURLOPT_WRITEFUNCTION, function($curl, $data) use ($in_headers) {
+ if (!$in_headers) {
+ // shouldn't be here unless we couldn't determine file size
+ // abort transfer
+ return 0;
+ }
+
+ // write function is also called when reading headers
+ return strlen($data);
+ });
+
+ curl_exec($ch);
+ curl_getinfo($ch);
+ curl_close($ch);
+
+ return $size;
+} \ No newline at end of file