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<?php |
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/** |
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* This file is part of the ZBateson\MailMimeParser project. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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*/ |
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namespace ZBateson\MailMimeParser\Stream; |
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use ArrayIterator; |
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use GuzzleHttp\Psr7; |
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use GuzzleHttp\Psr7\StreamDecoratorTrait; |
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use Psr\Http\Message\StreamInterface; |
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use ZBateson\MailMimeParser\Message\Part\ParentHeaderPart; |
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use ZBateson\MailMimeParser\Message\Part\MessagePart; |
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/** |
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* Psr7 stream decorator implementation providing a readable stream for a part's |
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* headers. |
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* |
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* HeaderStream is only used by a MimePart parent. It can accept any |
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* MessagePart - for non-MimeParts, only type headers are generated based on |
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* available information. |
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* |
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* @author Zaahid Bateson |
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*/ |
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class HeaderStream implements StreamInterface |
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{ |
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use StreamDecoratorTrait; |
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/** |
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* @var MessagePart the part to read from. |
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*/ |
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protected $part; |
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/** |
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* @param MessagePart $part |
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*/ |
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public function __construct(MessagePart $part) |
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{ |
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$this->part = $part; |
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} |
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/** |
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* Returns a header array for the current part. |
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* |
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* If the part is not a MimePart, Content-Type, Content-Disposition and |
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* Content-Transfer-Encoding headers are generated manually. |
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* |
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* @return array |
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*/ |
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private function getPartHeadersIterator() |
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{ |
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if ($this->part instanceof ParentHeaderPart) { |
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return $this->part->getRawHeaderIterator(); |
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} elseif ($this->part->getParent() !== null && $this->part->getParent()->isMime()) { |
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return new ArrayIterator([ |
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[ 'Content-Type', $this->part->getContentType() ], |
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[ 'Content-Disposition', $this->part->getContentDisposition() ], |
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[ 'Content-Transfer-Encoding', $this->part->getContentTransferEncoding() ] |
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]); |
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} |
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return new ArrayIterator(); |
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} |
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/** |
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* Writes out headers for $this->part and follows them with an empty line. |
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* |
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* @param StreamInterface $stream |
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*/ |
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public function writePartHeadersTo(StreamInterface $stream) |
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{ |
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foreach ($this->getPartHeadersIterator() as $header) { |
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$stream->write("${header[0]}: ${header[1]}\r\n"); |
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} |
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$stream->write("\r\n"); |
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} |
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/** |
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* Creates the underlying stream lazily when required. |
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* |
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* @return StreamInterface |
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*/ |
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protected function createStream() |
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{ |
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$stream = Psr7\stream_for(); |
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$this->writePartHeadersTo($stream); |
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$stream->rewind(); |
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return $stream; |
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} |
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} |
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zbateson /
mail-mime-parser
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