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<?php |
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/** |
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* Created by PhpStorm. |
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* User: tamaskovacs |
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* Date: 2017. 01. 27. |
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* Time: 21:45 |
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*/ |
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namespace Callisto; |
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use Psr\Http\Message\StreamInterface; |
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abstract class Psr7Stream implements StreamInterface |
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{ |
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/** |
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* Connection resource. |
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* |
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* @var resource |
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*/ |
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protected $connection; |
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/** |
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* @throws \Exception |
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*/ |
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public function __toString() |
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{ |
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throw new \RuntimeException('Cannot read the entire stream.'); |
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} |
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/** |
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* Closes the stream and any underlying resources. |
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* |
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* @return void |
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*/ |
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public function close() : void |
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{ |
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fclose($this->connection); |
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} |
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/** |
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* Separates any underlying resources from the stream. |
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* |
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* After the stream has been detached, the stream is in an unusable state. |
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* |
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* @return resource|null Underlying PHP stream, if any |
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*/ |
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public function detach() |
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{ |
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$this->close(); |
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return null; |
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} |
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/** |
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* We do not know the size of the stream. |
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* @return void |
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* @throws \RuntimeException |
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*/ |
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public function getSize() : void |
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{ |
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throw new \RuntimeException('We no not know the size of the stream.'); |
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} |
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/** |
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* We do not have the position of the cursor. |
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* |
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* @return void |
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* @throws \RuntimeException on error. |
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*/ |
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public function tell() : void |
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{ |
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throw new \RuntimeException('We do not know the position of the cursor.'); |
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} |
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/** |
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* Returns true if the stream is at the end of the stream. |
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* |
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* @return bool |
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*/ |
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public function eof() : bool |
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{ |
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return feof($this->connection); |
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} |
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/** |
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* The stream is not seekable. |
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* |
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* @return bool |
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*/ |
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public function isSeekable() : bool |
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{ |
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return false; |
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} |
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/** |
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* The stream is not seekable. |
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* |
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* @throws \RuntimeException on failure. |
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*/ |
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public function seek($offset, $whence = SEEK_SET) : void |
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{ |
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throw new \RuntimeException('The stream is not seekable.'); |
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} |
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/** |
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* The stream cannot be rewind. |
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* |
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* @throws \RuntimeException on failure. |
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*/ |
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public function rewind() : void |
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{ |
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throw new \RuntimeException('The stream is not seekable therefore it cannot be rewind.'); |
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} |
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/** |
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* Returns whether or not the stream is writable. |
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* |
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* @return bool |
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*/ |
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public function isWritable() : bool |
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{ |
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return true; |
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} |
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/** |
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* Write data to the stream. |
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* |
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* @param string $string The string that is to be written. |
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* @return int Returns the number of bytes written to the stream. |
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* @throws \RuntimeException on failure. |
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*/ |
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public function write($string) : int |
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{ |
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$length = strlen($string); |
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fwrite($this->connection, $string, $length); |
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return $length; |
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} |
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/** |
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* Returns whether or not the stream is readable. |
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* |
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* @return bool |
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*/ |
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1 |
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public function isReadable() : bool |
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{ |
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return true; |
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} |
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/** |
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* Read data from the stream. |
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* |
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* @param int $length Read up to $length bytes from the object and return |
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* them. Fewer than $length bytes may be returned if underlying stream |
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* call returns fewer bytes. |
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* @return string Returns the data read from the stream, or an empty string |
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* if no bytes are available. |
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* @throws \RuntimeException if an error occurs. |
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*/ |
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3 |
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public function read($length) |
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{ |
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return fread($this->connection, $length); |
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} |
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/** |
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* Reads the next line fron the stream. |
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* |
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* @param int $length Read up to $length bytes from the object and return |
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* them. Fewer than $length bytes may be returned if underlying stream |
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* call returns fewer bytes. |
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* @return string Returns the data read from the stream, or an empty string |
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* if no bytes are available. |
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* @throws \RuntimeException if an error occurs. |
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*/ |
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public function readLine($length = 1024) : string |
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{ |
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return (string)fgets($this->connection, $length); |
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} |
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/** |
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* Returns the remaining contents in a string |
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* |
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* @return string |
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* @throws \RuntimeException if unable to read or an error occurs while |
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* reading. |
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*/ |
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1 |
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public function getContents() |
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{ |
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throw new \RuntimeException('We cannot return the remaining contents of the stream.'); |
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} |
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/** |
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194
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* Get stream metadata as an associative array or retrieve a specific key. |
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* |
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* The keys returned are identical to the keys returned from PHP's |
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* stream_get_meta_data() function. |
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* |
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* @link http://php.net/manual/en/function.stream-get-meta-data.php |
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* @param string|null $key Specific metadata to retrieve. |
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* @return array|mixed|null Returns an associative array if no key is |
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* provided. Returns a specific key value if a key is provided and the |
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* value is found, or null if the key is not found. |
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*/ |
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public function getMetadata($key = null) |
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{ |
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return stream_get_meta_data($this->connection); |
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} |
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} |