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<?php |
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namespace Http\Adapter\Artax\Internal; |
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use Amp\Artax; |
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use Amp\ByteStream\InputStream; |
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use Amp\ByteStream\IteratorStream; |
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use Amp\CancellationTokenSource; |
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use Amp\CancelledException; |
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use Amp\Emitter; |
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use Amp\Promise; |
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use Psr\Http\Message\StreamInterface; |
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/** |
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* PSR-7 stream implementation that converts an `Amp\ByteStream\InputStream` into a PSR-7 compatible stream. |
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* |
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* @internal |
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*/ |
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class ResponseStream implements StreamInterface |
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{ |
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private $buffer = ''; |
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private $position = 0; |
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private $eof = false; |
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private $body; |
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private $cancellationTokenSource; |
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/** |
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* @param InputStream $body HTTP response stream to wrap. |
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* @param CancellationTokenSource $cancellationTokenSource Cancellation source bound to the request to abort it. |
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*/ |
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public function __construct(InputStream $body, CancellationTokenSource $cancellationTokenSource) |
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{ |
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$this->body = $body; |
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$this->cancellationTokenSource = $cancellationTokenSource; |
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} |
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public function __toString() |
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{ |
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try { |
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return $this->getContents(); |
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} catch (\Throwable $e) { |
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return ''; |
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} |
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} |
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public function __destruct() |
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{ |
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$this->close(); |
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} |
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public function close() |
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{ |
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$this->cancellationTokenSource->cancel(); |
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$emitter = new Emitter(); |
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$emitter->fail(new Artax\HttpException('The stream has been closed')); |
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$this->body = new IteratorStream($emitter->iterate()); |
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} |
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public function detach() |
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{ |
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$this->close(); |
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} |
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public function getSize() |
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{ |
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return null; |
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} |
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public function tell() |
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{ |
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return $this->position; |
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} |
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public function eof() |
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{ |
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return $this->eof; |
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} |
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public function isSeekable() |
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{ |
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return false; |
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} |
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2 |
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public function seek($offset, $whence = SEEK_SET) |
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{ |
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throw new \RuntimeException('Stream is not seekable'); |
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} |
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public function rewind() |
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{ |
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$this->seek(0); |
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} |
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public function isWritable() |
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{ |
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return false; |
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} |
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public function write($string) |
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{ |
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throw new \RuntimeException('Stream is not writable'); |
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} |
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public function isReadable() |
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{ |
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return true; |
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} |
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public function read($length) |
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{ |
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if ($this->eof) { |
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return ''; |
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} |
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if ('' === $this->buffer) { |
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try { |
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$this->buffer = Promise\wait($this->body->read()); |
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} catch (Artax\HttpException $e) { |
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throw new \RuntimeException('Reading from the stream failed', 0, $e); |
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} catch (CancelledException $e) { |
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throw new \RuntimeException('Reading from the stream failed', 0, $e); |
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} |
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if (null === $this->buffer) { |
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$this->eof = true; |
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return ''; |
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} |
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} |
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$read = \substr($this->buffer, 0, $length); |
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$this->buffer = (string) \substr($this->buffer, $length); |
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$this->position += \strlen($read); |
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return $read; |
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} |
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public function getContents() |
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{ |
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$buffer = ''; |
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while (!$this->eof()) { |
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$buffer .= $this->read(8192 * 8); |
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} |
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return $buffer; |
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} |
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1 |
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public function getMetadata($key = null) |
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{ |
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return null === $key ? [] : null; |
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} |
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} |
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php-http /
artax-adapter
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: