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add stream wrapper to calculate hash on write

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This commit is contained in:
Robin Appelman 2019-03-12 10:42:36 +01:00
commit 6c91d3e390
4 changed files with 128 additions and 24 deletions
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28
src/HashWrapper.php
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@ -23,15 +23,8 @@
namespace Icewind\Streams;
/**
* Wrapper that calculates the hash on the stream on read
*
* The stream and hash should be passed in when wrapping the stream.
* On close the callback will be called with the calculated checksum.
*
* For supported hashes see: http://php.net/manual/en/function.hash-algos.php
*/
class HashWrapper extends Wrapper {
abstract class HashWrapper extends Wrapper {
/**
* @var callable
@ -49,15 +42,15 @@ class HashWrapper extends Wrapper {
* @param resource $source
* @param string $hash
* @param callable $callback
* @return resource
* @return resource|bool
*
* @throws \BadMethodCallException
*/
public static function wrap($source, $hash, $callback) {
$context = array(
$context = [
'hash' => $hash,
'callback' => $callback,
);
];
return self::wrapSource($source, $context);
}
@ -72,12 +65,8 @@ class HashWrapper extends Wrapper {
return true;
}
public function stream_read($count) {
$data = parent::stream_read($count);
if ($this->hashContext !== false) {
hash_update($this->hashContext, $data);
}
return $data;
protected function updateHash($data) {
hash_update($this->hashContext, $data);
}
public function stream_close() {
@ -87,4 +76,5 @@ class HashWrapper extends Wrapper {
}
return parent::stream_close();
}
}
}