Zend_Http_Header_HeaderValue Class Reference

Static Public Member Functions
static	filter ($value)
static	isValid ($value)
static	assertValid ($value)

Detailed Description

Definition at line 31 of file HeaderValue.php.

Member Function Documentation

assertValid()

static assertValid (   $value )

static

Assert a header value is valid.

Parameters

string

$value

Exceptions

Exception

Definition at line 120 of file HeaderValue.php.

    {
        if (! self::isValid($value)) {
            #require_once 'Zend/Http/Header/Exception/InvalidArgumentException.php';
            throw new Zend_Http_Header_Exception_InvalidArgumentException('Invalid header value');
        }
    }

filter()

static filter (   $value )

static

Filter a header value

Ensures CRLF header injection vectors are filtered.

Per RFC 7230, only VISIBLE ASCII characters, spaces, and horizontal tabs are allowed in values; only one whitespace character is allowed between visible characters.

See also

http://en.wikipedia.org/wiki/HTTP_response_splitting

Parameters

string

$value

Returns

string

Definition at line 53 of file HeaderValue.php.

    {
        $value  = (string) $value;
        $length = strlen($value);
        $string = '';
        for ($i = 0; $i < $length; $i += 1) {
            $ascii = ord($value[$i]);

            // Non-visible, non-whitespace characters
            // 9 === horizontal tab
            // 32-126, 128-254 === visible
            // 127 === DEL
            // 255 === null byte
            if (($ascii < 32 && $ascii !== 9)
                || $ascii === 127
                || $ascii > 254
            ) {
                continue;
            }

            $string .= $value[$i];
        }

        return $string;
    }

isValid()

static isValid (   $value )

static

Validate a header value.

Per RFC 7230, only VISIBLE ASCII characters, spaces, and horizontal tabs are allowed in values; only one whitespace character is allowed between visible characters.

See also

http://en.wikipedia.org/wiki/HTTP_response_splitting

Parameters

string

$value

Returns

bool

Definition at line 90 of file HeaderValue.php.

    {
        $value  = (string) $value;
        $length = strlen($value);
        for ($i = 0; $i < $length; $i += 1) {
            $ascii = ord($value[$i]);

            // Non-visible, non-whitespace characters
            // 9 === horizontal tab
            // 32-126, 128-254 === visible
            // 127 === DEL
            // 255 === null byte
            if (($ascii < 32 && $ascii !== 9)
                || $ascii === 127
                || $ascii > 254
            ) {
                return false;
            }
        }

        return true;
    }

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The documentation for this class was generated from the following file:

• vendor/magento/zendframework1/library/Zend/Http/Header/HeaderValue.php