Developer
<?php
namespace Intervention\Image;
use GuzzleHttp\Psr7\Stream;
use Intervention\Image\Exception\NotReadableException;
use Psr\Http\Message\StreamInterface;
abstract class AbstractDecoder
{
/**
* Initiates new image from path in filesystem
*
* @param string $path
* @return \Intervention\Image\Image
*/
abstract public function initFromPath($path);
/**
* Initiates new image from binary data
*
* @param string $data
* @return \Intervention\Image\Image
*/
abstract public function initFromBinary($data);
/**
* Initiates new image from GD resource
*
* @param Resource $resource
* @return \Intervention\Image\Image
*/
abstract public function initFromGdResource($resource);
/**
* Initiates new image from Imagick object
*
* @param \Imagick $object
* @return \Intervention\Image\Image
*/
abstract public function initFromImagick(\Imagick $object);
/**
* Buffer of input data
*
* @var mixed
*/
private $data;
/**
* Creates new Decoder with data
*
* @param mixed $data
*/
public function __construct($data = null)
{
$this->data = $data;
}
/**
* Init from given URL
*
* @param string $url
* @return \Intervention\Image\Image
*/
public function initFromUrl($url)
{
$options = [
'http' => [
'method'=>"GET",
'protocol_version'=>1.1, // force use HTTP 1.1 for service mesh environment with envoy
'header'=>"Accept-language: en\r\n".
"User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36\r\n"
]
];
$context = stream_context_create($options);
if ($data = @file_get_contents($url, false, $context)) {
return $this->initFromBinary($data);
}
throw new NotReadableException(
"Unable to init from given url (".$url.")."
);
}
/**
* Init from given stream
*
* @param StreamInterface|resource $stream
* @return \Intervention\Image\Image
*/
public function initFromStream($stream)
{
if (!$stream instanceof StreamInterface) {
$stream = new Stream($stream);
}
try {
$offset = $stream->tell();
} catch (\RuntimeException $e) {
$offset = 0;
}
$shouldAndCanSeek = $offset !== 0 && $stream->isSeekable();
if ($shouldAndCanSeek) {
$stream->rewind();
}
try {
$data = $stream->getContents();
} catch (\RuntimeException $e) {
$data = null;
}
if ($shouldAndCanSeek) {
$stream->seek($offset);
}
if ($data) {
return $this->initFromBinary($data);
}
throw new NotReadableException(
"Unable to init from given stream"
);
}
/**
* Determines if current source data is GD resource
*
* @return boolean
*/
public function isGdResource()
{
if (is_resource($this->data)) {
return (get_resource_type($this->data) == 'gd');
}
if ($this->data instanceof \GdImage) {
return true;
}
return false;
}
/**
* Determines if current source data is Imagick object
*
* @return boolean
*/
public function isImagick()
{
return is_a($this->data, 'Imagick');
}
/**
* Determines if current source data is Intervention\Image\Image object
*
* @return boolean
*/
public function isInterventionImage()
{
return is_a($this->data, '\Intervention\Image\Image');
}
/**
* Determines if current data is SplFileInfo object
*
* @return boolean
*/
public function isSplFileInfo()
{
return is_a($this->data, 'SplFileInfo');
}
/**
* Determines if current data is Symfony UploadedFile component
*
* @return boolean
*/
public function isSymfonyUpload()
{
return is_a($this->data, 'Symfony\Component\HttpFoundation\File\UploadedFile');
}
/**
* Determines if current source data is file path
*
* @return boolean
*/
public function isFilePath()
{
if (is_string($this->data)) {
try {
return is_file($this->data);
} catch (\Exception $e) {
return false;
}
}
return false;
}
/**
* Determines if current source data is url
*
* @return boolean
*/
public function isUrl()
{
return (bool) filter_var($this->data, FILTER_VALIDATE_URL);
}
/**
* Determines if current source data is a stream resource
*
* @return boolean
*/
public function isStream()
{
if ($this->data instanceof StreamInterface) return true;
if (!is_resource($this->data)) return false;
if (get_resource_type($this->data) !== 'stream') return false;
return true;
}
/**
* Determines if current source data is binary data
*
* @return boolean
*/
public function isBinary()
{
if (is_string($this->data)) {
$mime = finfo_buffer(finfo_open(FILEINFO_MIME_TYPE), $this->data);
return (substr($mime, 0, 4) != 'text' && $mime != 'application/x-empty');
}
return false;
}
/**
* Determines if current source data is data-url
*
* @return boolean
*/
public function isDataUrl()
{
$data = $this->decodeDataUrl($this->data);
return is_null($data) ? false : true;
}
/**
* Determines if current source data is base64 encoded
*
* @return boolean
*/
public function isBase64()
{
if (!is_string($this->data)) {
return false;
}
return base64_encode(base64_decode($this->data)) === str_replace(["\n", "\r"], '', $this->data);
}
/**
* Initiates new Image from Intervention\Image\Image
*
* @param Image $object
* @return \Intervention\Image\Image
*/
public function initFromInterventionImage($object)
{
return $object;
}
/**
* Parses and decodes binary image data from data-url
*
* @param string $data_url
* @return string
*/
private function decodeDataUrl($data_url)
{
if (!is_string($data_url)) {
return null;
}
$pattern = "/^data:(?:image\/[a-zA-Z\-\.]+)(?:charset=\".+\")?;base64,(?P<data>.+)$/";
preg_match($pattern, str_replace(["\n", "\r"], '', $data_url), $matches);
if (is_array($matches) && array_key_exists('data', $matches)) {
return base64_decode($matches['data']);
}
return null;
}
/**
* Initiates new image from mixed data
*
* @param mixed $data
* @return \Intervention\Image\Image
*/
public function init($data)
{
$this->data = $data;
switch (true) {
case $this->isGdResource():
return $this->initFromGdResource($this->data);
case $this->isImagick():
return $this->initFromImagick($this->data);
case $this->isInterventionImage():
return $this->initFromInterventionImage($this->data);
case $this->isSplFileInfo():
return $this->initFromPath($this->data->getRealPath());
case $this->isBinary():
return $this->initFromBinary($this->data);
case $this->isUrl():
return $this->initFromUrl($this->data);
case $this->isStream():
return $this->initFromStream($this->data);
case $this->isDataUrl():
return $this->initFromBinary($this->decodeDataUrl($this->data));
case $this->isFilePath():
return $this->initFromPath($this->data);
// isBase64 has to be after isFilePath to prevent false positives
case $this->isBase64():
return $this->initFromBinary(base64_decode($this->data));
default:
throw new NotReadableException("Image source not readable");
}
}
/**
* Decoder object transforms to string source data
*
* @return string
*/
public function __toString()
{
return (string) $this->data;
}
}
Developer
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