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AcceptHeader.php	3.673KB	edt ren
AcceptHeaderItem.php	3.539KB	edt ren
ApacheRequest.php	1.122KB	edt ren
BinaryFileResponse.php	12.919KB	edt ren
CHANGELOG.md	12.18KB	edt ren
Cookie.php	8.902KB	edt ren
ExpressionRequestMatche...	1.322KB	edt ren
FileBag.php	3.905KB	edt ren
HeaderBag.php	8.242KB	edt ren
HeaderUtils.php	7.723KB	edt ren
IpUtils.php	5.639KB	edt ren
JsonResponse.php	7.229KB	edt ren
LICENSE	1.04KB	edt ren
ParameterBag.php	5.683KB	edt ren
README.md	0.514KB	edt ren
RedirectResponse.php	3.151KB	edt ren
Request.php	64.234KB	edt ren
RequestMatcher.php	4.782KB	edt ren
RequestMatcherInterface...	0.671KB	edt ren
RequestStack.php	2.242KB	edt ren
Response.php	36.158KB	edt ren
ResponseHeaderBag.php	8.324KB	edt ren
ServerBag.php	3.918KB	edt ren
StreamedResponse.php	3.179KB	edt ren
UrlHelper.php	3.025KB	edt ren
composer.json	0.933KB	edt ren
index.php	79.496KB	edt ren

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation;

/**
 * HTTP header utility functions.
 *
 * @author Christian Schmidt <github@chsc.dk>
 */
class HeaderUtils
{
    public const DISPOSITION_ATTACHMENT = 'attachment';
    public const DISPOSITION_INLINE = 'inline';

/**
     * This class should not be instantiated.
     */
    private function __construct()
    {
    }

/**
     * Splits an HTTP header by one or more separators.
     *
     * Example:
     *
     *     HeaderUtils::split("da, en-gb;q=0.8", ",;")
     *     // => ['da'], ['en-gb', 'q=0.8']]
     *
     * @param string $separators List of characters to split on, ordered by
     *                           precedence, e.g. ",", ";=", or ",;="
     *
     * @return array Nested array with as many levels as there are characters in
     *               $separators
     */
    public static function split(string $header, string $separators): array
    {
        $quotedSeparators = preg_quote($separators, '/');

preg_match_all('
            /
                (?!\s)
                    (?:
                        # quoted-string
                        "(?:[^"\\\\]|\\\\.)*(?:"|\\\\|$)
                    |
                        # token
                        [^"'.$quotedSeparators.']+
                    )+
                (?<!\s)
            |
                # separator
                \s*
                (?<separator>['.$quotedSeparators.'])
                \s*
            /x', trim($header), $matches, \PREG_SET_ORDER);

return self::groupParts($matches, $separators);
    }

/**
     * Combines an array of arrays into one associative array.
     *
     * Each of the nested arrays should have one or two elements. The first
     * value will be used as the keys in the associative array, and the second
     * will be used as the values, or true if the nested array only contains one
     * element. Array keys are lowercased.
     *
     * Example:
     *
     *     HeaderUtils::combine([["foo", "abc"], ["bar"]])
     *     // => ["foo" => "abc", "bar" => true]
     */
    public static function combine(array $parts): array
    {
        $assoc = [];
        foreach ($parts as $part) {
            $name = strtolower($part[0]);
            $value = $part[1] ?? true;
            $assoc[$name] = $value;
        }

return $assoc;
    }

/**
     * Joins an associative array into a string for use in an HTTP header.
     *
     * The key and value of each entry are joined with "=", and all entries
     * are joined with the specified separator and an additional space (for
     * readability). Values are quoted if necessary.
     *
     * Example:
     *
     *     HeaderUtils::toString(["foo" => "abc", "bar" => true, "baz" => "a b c"], ",")
     *     // => 'foo=abc, bar, baz="a b c"'
     */
    public static function toString(array $assoc, string $separator): string
    {
        $parts = [];
        foreach ($assoc as $name => $value) {
            if (true === $value) {
                $parts[] = $name;
            } else {
                $parts[] = $name.'='.self::quote($value);
            }
        }

return implode($separator.' ', $parts);
    }

/**
     * Encodes a string as a quoted string, if necessary.
     *
     * If a string contains characters not allowed by the "token" construct in
     * the HTTP specification, it is backslash-escaped and enclosed in quotes
     * to match the "quoted-string" construct.
     */
    public static function quote(string $s): string
    {
        if (preg_match('/^[a-z0-9!#$%&\'*.^_`|~-]+$/i', $s)) {
            return $s;
        }

return '"'.addcslashes($s, '"\\"').'"';
    }

/**
     * Decodes a quoted string.
     *
     * If passed an unquoted string that matches the "token" construct (as
     * defined in the HTTP specification), it is passed through verbatimly.
     */
    public static function unquote(string $s): string
    {
        return preg_replace('/\\\\(.)|"/', '$1', $s);
    }

/**
     * Generates an HTTP Content-Disposition field-value.
     *
     * @param string $disposition      One of "inline" or "attachment"
     * @param string $filename         A unicode string
     * @param string $filenameFallback A string containing only ASCII characters that
     *                                 is semantically equivalent to $filename. If the filename is already ASCII,
     *                                 it can be omitted, or just copied from $filename
     *
     * @return string A string suitable for use as a Content-Disposition field-value
     *
     * @throws \InvalidArgumentException
     *
     * @see RFC 6266
     */
    public static function makeDisposition(string $disposition, string $filename, string $filenameFallback = ''): string
    {
        if (!\in_array($disposition, [self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE])) {
            throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
        }

if ('' === $filenameFallback) {
            $filenameFallback = $filename;
        }

// filenameFallback is not ASCII.
        if (!preg_match('/^[\x20-\x7e]*$/', $filenameFallback)) {
            throw new \InvalidArgumentException('The filename fallback must only contain ASCII characters.');
        }

// percent characters aren't safe in fallback.
        if (str_contains($filenameFallback, '%')) {
            throw new \InvalidArgumentException('The filename fallback cannot contain the "%" character.');
        }

// path separators aren't allowed in either.
        if (str_contains($filename, '/') || str_contains($filename, '\\') || str_contains($filenameFallback, '/') || str_contains($filenameFallback, '\\')) {
            throw new \InvalidArgumentException('The filename and the fallback cannot contain the "/" and "\\" characters.');
        }

$params = ['filename' => $filenameFallback];
        if ($filename !== $filenameFallback) {
            $params['filename*'] = "utf-8''".rawurlencode($filename);
        }

return $disposition.'; '.self::toString($params, ';');
    }

private static function groupParts(array $matches, string $separators, bool $first = true): array
    {
        $separator = $separators[0];
        $partSeparators = substr($separators, 1);

$i = 0;
        $partMatches = [];
        $previousMatchWasSeparator = false;
        foreach ($matches as $match) {
            if (!$first && $previousMatchWasSeparator && isset($match['separator']) && $match['separator'] === $separator) {
                $previousMatchWasSeparator = true;
                $partMatches[$i][] = $match;
            } elseif (isset($match['separator']) && $match['separator'] === $separator) {
                $previousMatchWasSeparator = true;
                ++$i;
            } else {
                $previousMatchWasSeparator = false;
                $partMatches[$i][] = $match;
            }
        }

$parts = [];
        if ($partSeparators) {
            foreach ($partMatches as $matches) {
                $parts[] = self::groupParts($matches, $partSeparators, false);
            }
        } else {
            foreach ($partMatches as $matches) {
                $parts[] = self::unquote($matches[0][0]);
            }

if (!$first && 2 < \count($parts)) {
                $parts = [
                    $parts[0],
                    implode($separator, \array_slice($parts, 1)),
                ];
            }
        }

return $parts;
    }
}