/**
* @param array $options ['etag'=> bool, 'file_get_contents' => bool]
*/
public function __construct($filename, $options = array('etag' => false))
{
$this->filename = $filename;
$this->etag = array_value($options, 'etag');
if (!file_exists($filename)) {
if (basename($filename) == 'index.html') {
$this->error = new HttpError(403);
} else {
$this->error = new HttpError(404);
}
return;
}
$last_modified = filemtime($filename);
if ($last_modified === false) {
$this->error = new HttpError(500);
return;
}
if (array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER)) {
$if_modified_since = strtotime(preg_replace('/;.*$/', '', $_SERVER['HTTP_IF_MODIFIED_SINCE']));
if ($if_modified_since >= $last_modified) {
// Is the Cached version the most recent?
$this->notModified = true;
return;
}
}
if ($this->etag) {
$etag = md5_file($filename);
if (array_value($_SERVER, 'HTTP_IF_NONE_MATCH') === $etag) {
$this->notModified = true;
return;
}
$this->headers[] = 'ETag: ' . md5_file($filename);
}
$this->notModified = false;
if (is_dir($filename)) {
$this->error = new HttpError(403);
return;
}
$this->headers['Content-Type'] = \Sledgehammer\mimetype($filename);
$this->headers['Last-Modified'] = gmdate('r', $last_modified);
$filesize = filesize($filename);
if ($filesize === false) {
$this->error = new HttpError(500);
return;
}
$this->headers['Content-Length'] = $filesize;
// @todo Detecteer bestanden groter dan 2GiB, deze geven fouten.
if (array_value($options, 'file_get_contents')) {
$this->fileContents = file_get_contents($filename);
}
}
protected function rasterize()
{
if ($this->gd === null) {
$mimetype = \Sledgehammer\mimetype($this->filename, true, 'UNKNOWN');
if ($mimetype == 'UNKNOWN' || $this->createFromMimetype($mimetype) == false) {
$imageInfo = getimagesize($this->filename);
if (isset($imageInfo['mime'])) {
$detectedMimetype = $imageInfo['mime'];
} else {
notice('Imagetype detection failed');
$detectedMimetype = false;
}
if ($detectedMimetype === false || $this->createFromMimetype($detectedMimetype) == false) {
throw new Exception('Unable to load "' . $this->filename . '"');
}
if ($mimetype != 'UNKNOWN') {
notice('Invalid extension, detected mimetype: "' . $detectedMimetype . '" for "' . $this->filename . '"');
}
}
}
return $this->gd;
}
protected function isImage($filename)
{
return substr(\Sledgehammer\mimetype($filename, true), 0, 6) == 'image/';
}
/**
* Save the graphic as an image.
*
* @param string $filename
* @param array $options
*/
public function saveAs($filename, $options = array())
{
$defaults = array('mimetype' => null, 'quality' => 85);
$options = $options + $defaults;
$error = 'Failed to save the image to "' . $filename . '"';
$mimetype = $options['mimetype'];
if ($filename === null) {
$error = 'Failed to render the image';
} elseif ($mimetype === null) {
$mimetype = \Sledgehammer\mimetype($filename, true);
}
if ($mimetype === 'image/jpeg') {
if (!imagejpeg($this->rasterize(), $filename, $options['quality'])) {
throw new Exception($error);
}
return;
}
$mimetype_to_function = array('image/png' => 'imagepng', 'image/gif' => 'imagegif');
if (isset($mimetype_to_function[$mimetype])) {
$function = $mimetype_to_function[$mimetype];
if (!$function($this->rasterize(), $filename)) {
throw new Exception($error);
}
} else {
warning('Unsupported mimetype: "' . $mimetype . '"');
}
}
