-
- /**
- * Guess image mimetype from filename or from Content-Type header
- *
- * @param string $filename Image filename
- * @param boolean $fromcurl Check Content-Type header from curl request
- * @param string $header passed headers to take into account
- *
- * @return object
- * @throws \ImagickException
- */
- public static function guessType($filename, $fromcurl = false, $header = '')
- {
- Logger::log('Image: guessType: '.$filename . ($fromcurl?' from curl headers':''), Logger::DEBUG);
- $type = null;
- if ($fromcurl) {
- $headers=[];
- $h = explode("\n", $header);
- foreach ($h as $l) {
- $data = array_map("trim", explode(":", trim($l), 2));
- if (count($data) > 1) {
- list($k,$v) = $data;
- $headers[$k] = $v;
- }
- }
- if (array_key_exists('Content-Type', $headers))
- $type = $headers['Content-Type'];
- }
- if (is_null($type)) {
- // Guessing from extension? Isn't that... dangerous?
- if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
- /**
- * Well, this not much better,
- * but at least it comes from the data inside the image,
- * we won't be tricked by a manipulated extension
- */
- $image = new Imagick($filename);
- $type = $image->getImageMimeType();
- $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
- } else {
- $ext = pathinfo($filename, PATHINFO_EXTENSION);
- $types = self::supportedTypes();
- $type = "image/jpeg";
- foreach ($types as $m => $e) {
- if ($ext == $e) {
- $type = $m;
- }
- }
- }
- }
- Logger::log('Image: guessType: type='.$type, Logger::DEBUG);
- return $type;
- }
-
- /**
- * @param string $url url
- * @return object
- * @throws \Friendica\Network\HTTPException\InternalServerErrorException
- */
- public static function getInfoFromURL($url)
- {
- $data = [];
-
- if (empty($url)) {
- return $data;
- }
-
- $data = Cache::get($url);
-
- if (is_null($data) || !$data || !is_array($data)) {
- $img_str = Network::fetchUrl($url, true, 4);
-
- if (!$img_str) {
- return false;
- }
-
- $filesize = strlen($img_str);
-
- try {
- if (function_exists("getimagesizefromstring")) {
- $data = @getimagesizefromstring($img_str);
- } else {
- $tempfile = tempnam(get_temppath(), "cache");
-
- $a = \get_app();
- $stamp1 = microtime(true);
- file_put_contents($tempfile, $img_str);
- $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
-
- $data = getimagesize($tempfile);
- unlink($tempfile);
- }
- } catch (Exception $e) {
- return false;
- }
-
- if ($data) {
- $data["size"] = $filesize;
- }
-
- Cache::set($url, $data);
- }
-
- return $data;
- }
-
- /**
- * @param integer $width width
- * @param integer $height height
- * @param integer $max max
- * @return array
- */
- public static function getScalingDimensions($width, $height, $max)
- {
- if ((!$width) || (!$height)) {
- return false;
- }
-
- if ($width > $max && $height > $max) {
- // very tall image (greater than 16:9)
- // constrain the width - let the height float.
-
- if ((($height * 9) / 16) > $width) {
- $dest_width = $max;
- $dest_height = intval(($height * $max) / $width);
- } elseif ($width > $height) {
- // else constrain both dimensions
- $dest_width = $max;
- $dest_height = intval(($height * $max) / $width);
- } else {
- $dest_width = intval(($width * $max) / $height);
- $dest_height = $max;
- }
- } else {
- if ($width > $max) {
- $dest_width = $max;
- $dest_height = intval(($height * $max) / $width);
- } else {
- if ($height > $max) {
- // very tall image (greater than 16:9)
- // but width is OK - don't do anything
-
- if ((($height * 9) / 16) > $width) {
- $dest_width = $width;
- $dest_height = $height;
- } else {
- $dest_width = intval(($width * $max) / $height);
- $dest_height = $max;
- }
- } else {
- $dest_width = $width;
- $dest_height = $height;
- }
- }
- }
- return ["width" => $dest_width, "height" => $dest_height];
- }