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File Name : AbstractSerializer.php

<?php

declare(strict_types=1);

namespace Laminas\Diactoros;

use Psr\Http\Message\StreamInterface;

use function array_pop;
use function implode;
use function preg_match;
use function sprintf;
use function str_replace;
use function trim;
use function ucwords;

/**
 * Provides base functionality for request and response de/serialization
 * strategies, including functionality for retrieving a line at a time from
 * the message, splitting headers from the body, and serializing headers.
 */
abstract class AbstractSerializer
{
    public const CR  = "\r";
    public const EOL = "\r\n";
    public const LF  = "\n";

/**
     * Retrieve a single line from the stream.
     *
     * Retrieves a line from the stream; a line is defined as a sequence of
     * characters ending in a CRLF sequence.
     *
     * @throws Exception\DeserializationException If the sequence contains a CR
     *     or LF in isolation, or ends in a CR.
     */
    protected static function getLine(StreamInterface $stream): string
    {
        $line    = '';
        $crFound = false;
        while (! $stream->eof()) {
            $char = $stream->read(1);

if ($crFound && $char === self::LF) {
                $crFound = false;
                break;
            }

// CR NOT followed by LF
            if ($crFound && $char !== self::LF) {
                throw Exception\DeserializationException::forUnexpectedCarriageReturn();
            }

// LF in isolation
            if (! $crFound && $char === self::LF) {
                throw Exception\DeserializationException::forUnexpectedLineFeed();
            }

// CR found; do not append
            if ($char === self::CR) {
                $crFound = true;
                continue;
            }

// Any other character: append
            $line .= $char;
        }

// CR found at end of stream
        if ($crFound) {
            throw Exception\DeserializationException::forUnexpectedEndOfHeaders();
        }

return $line;
    }

/**
     * Split the stream into headers and body content.
     *
     * Returns an array containing two elements
     *
     * - The first is an array of headers
     * - The second is a StreamInterface containing the body content
     *
     * @throws Exception\DeserializationException For invalid headers.
     */
    protected static function splitStream(StreamInterface $stream): array
    {
        $headers       = [];
        $currentHeader = false;

while ($line = self::getLine($stream)) {
            if (preg_match(';^(?P<name>[!#$%&\'*+.^_`\|~0-9a-zA-Z-]+):(?P<value>.*)$;', $line, $matches)) {
                $currentHeader = $matches['name'];
                if (! isset($headers[$currentHeader])) {
                    $headers[$currentHeader] = [];
                }
                $headers[$currentHeader][] = trim($matches['value'], "\t ");
                continue;
            }

if ($currentHeader === false) {
                throw Exception\DeserializationException::forInvalidHeader();
            }

if (! preg_match('#^[ \t]#', $line)) {
                throw Exception\DeserializationException::forInvalidHeaderContinuation();
            }

// Append continuation to last header value found
            $value                     = array_pop($headers[$currentHeader]);
            $headers[$currentHeader][] = $value . ' ' . trim($line, "\t ");
        }

// use RelativeStream to avoid copying initial stream into memory
        return [$headers, new RelativeStream($stream, $stream->tell())];
    }

/**
     * Serialize headers to string values.
     *
     * @psalm-param array<string, string[]> $headers
     */
    protected static function serializeHeaders(array $headers): string
    {
        $lines = [];
        foreach ($headers as $header => $values) {
            $normalized = self::filterHeader($header);
            foreach ($values as $value) {
                $lines[] = sprintf('%s: %s', $normalized, $value);
            }
        }

return implode("\r\n", $lines);
    }

/**
     * Filter a header name to wordcase
     *
     * @param string $header
     */
    protected static function filterHeader($header): string
    {
        $filtered = str_replace('-', ' ', $header);
        $filtered = ucwords($filtered);
        return str_replace(' ', '-', $filtered);
    }
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:38
..	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:36
Exception	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:36
Request	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:38
Response	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:38
ServerRequestFilter	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:38
functions	dir	-	tecnsujc/tecnsujc	0755	2025-06-12 02:33:38
AbstractSerializer.php	text/x-php	4.35 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
CallbackStream.php	text/x-php	3.13 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
ConfigProvider.php	text/x-php	1.89 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
HeaderSecurity.php	text/x-php	4.65 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
MessageTrait.php	text/x-php	12.58 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
Module.php	text/x-php	235 B	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
RelativeStream.php	text/x-php	3.23 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
Request.php	text/x-php	1.83 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
RequestFactory.php	text/x-php	375 B	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
RequestTrait.php	text/x-php	9.17 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
Response.php	text/x-php	5.19 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
ResponseFactory.php	text/x-php	440 B	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
ServerRequest.php	text/x-php	5.85 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
ServerRequestFactory.php	text/x-php	3.17 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
Stream.php	text/x-php	8.51 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
StreamFactory.php	text/x-php	912 B	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
UploadedFile.php	text/x-php	7.02 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
UploadedFileFactory.php	text/x-php	756 B	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
Uri.php	text/x-php	15.76 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34
UriFactory.php	text/x-php	7.71 KB	tecnsujc/tecnsujc	0644	2025-05-05 04:03:34

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