68 lines
2.1 KiB
PHP
68 lines
2.1 KiB
PHP
<?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\Parser;
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use Psr\Log\LogLevel;
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use ZBateson\MailMimeParser\Message\PartHeaderContainer;
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/**
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* Reads headers from an input stream, adding them to a PartHeaderContainer.
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*
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* @author Zaahid Bateson
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*/
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class HeaderParserService
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{
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/**
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* Ensures the header isn't empty and contains a colon separator character,
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* then splits it and adds it to the passed PartHeaderContainer.
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*
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* @param int $offset read offset for error reporting
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* @param string $header the header line
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* @param PartHeaderContainer $headerContainer the container
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*/
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private function addRawHeaderToPart(int $offset, string $header, PartHeaderContainer $headerContainer) : static
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{
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if ($header !== '') {
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if (\strpos($header, ':') !== false) {
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$a = \explode(':', $header, 2);
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$headerContainer->add($a[0], \trim($a[1]));
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} else {
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$headerContainer->addError(
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"Invalid header found at offset: $offset",
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LogLevel::ERROR
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);
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}
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}
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return $this;
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}
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/**
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* Reads header lines up to an empty line, adding them to the passed
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* PartHeaderContainer.
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*
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* @param resource $handle The resource handle to read from.
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* @param PartHeaderContainer $container the container to add headers to.
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*/
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public function parse($handle, PartHeaderContainer $container) : static
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{
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$header = '';
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do {
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$offset = \ftell($handle);
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$line = MessageParserService::readLine($handle);
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if ($line === false || $line === '' || $line[0] !== "\t" && $line[0] !== ' ') {
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$this->addRawHeaderToPart($offset, $header, $container);
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$header = '';
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} else {
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$line = "\r\n" . $line;
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}
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$header .= \rtrim($line, "\r\n");
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} while ($header !== '');
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return $this;
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}
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}
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