<?php
/**
* Cookie storage object
*
* @package Requests\Cookies
*/
namespace WpOrg\Requests;
use WpOrg\Requests\Exception\InvalidArgument;
use WpOrg\Requests\Iri;
use WpOrg\Requests\Response\Headers;
use WpOrg\Requests\Utility\CaseInsensitiveDictionary;
use WpOrg\Requests\Utility\InputValidator;
/**
* Cookie storage object
*
* @package Requests\Cookies
*/
class Cookie {
/**
* Cookie name.
*
* @var string
*/
public $name;
/**
* Cookie value.
*
* @var string
*/
public $value;
/**
* Cookie attributes
*
* Valid keys are `'path'`, `'domain'`, `'expires'`, `'max-age'`, `'secure'` and
* `'httponly'`.
*
* @var \WpOrg\Requests\Utility\CaseInsensitiveDictionary|array Array-like object
*/
public $attributes = [];
/**
* Cookie flags
*
* Valid keys are `'creation'`, `'last-access'`, `'persistent'` and `'host-only'`.
*
* @var array
*/
public $flags = [];
/**
* Reference time for relative calculations
*
* This is used in place of `time()` when calculating Max-Age expiration and
* checking time validity.
*
* @var int
*/
public $reference_time = 0;
/**
* Create a new cookie object
*
* @param string $name The name of the cookie.
* @param string $value The value for the cookie.
* @param array|\WpOrg\Requests\Utility\CaseInsensitiveDictionary $attributes Associative array of attribute data
* @param array $flags The flags for the cookie.
* Valid keys are `'creation'`, `'last-access'`,
* `'persistent'` and `'host-only'`.
* @param int|null $reference_time Reference time for relative calculations.
*
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $name argument is not a string.
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $value argument is not a string.
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $attributes argument is not an array or iterable object with array access.
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $flags argument is not an array.
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $reference_time argument is not an integer or null.
*/
public function __construct($name, $value, $attributes = [], $flags = [], $reference_time = null) {
if (is_string($name) === false) {
throw InvalidArgument::create(1, '$name', 'string', gettype($name));
}
if (is_string($value) === false) {
throw InvalidArgument::create(2, '$value', 'string', gettype($value));
}
if (InputValidator::has_array_access($attributes) === false || InputValidator::is_iterable($attributes) === false) {
throw InvalidArgument::create(3, '$attributes', 'array|ArrayAccess&Traversable', gettype($attributes));
}
if (is_array($flags) === false) {
throw InvalidArgument::create(4, '$flags', 'array', gettype($flags));
}
if ($reference_time !== null && is_int($reference_time) === false) {
throw InvalidArgument::create(5, '$reference_time', 'integer|null', gettype($reference_time));
}
$this->name = $name;
$this->value = $value;
$this->attributes = $attributes;
$default_flags = [
'creation' => time(),
'last-access' => time(),
'persistent' => false,
'host-only' => true,
];
$this->flags = array_merge($default_flags, $flags);
$this->reference_time = time();
if ($reference_time !== null) {
$this->reference_time = $reference_time;
}
$this->normalize();
}
/**
* Get the cookie value
*
* Attributes and other data can be accessed via methods.
*/
public function __toString() {
return $this->value;
}
/**
* Check if a cookie is expired.
*
* Checks the age against $this->reference_time to determine if the cookie
* is expired.
*
* @return boolean True if expired, false if time is valid.
*/
public function is_expired() {
// RFC6265, s. 4.1.2.2:
// If a cookie has both the Max-Age and the Expires attribute, the Max-
// Age attribute has precedence and controls the expiration date of the
// cookie.
if (isset($this->attributes['max-age'])) {
$max_age = $this->attributes['max-age'];
return $max_age < $this->reference_time;
}
if (isset($this->attributes['expires'])) {
$expires = $this->attributes['expires'];
return $expires < $this->reference_time;
}
return false;
}
/**
* Check if a cookie is valid for a given URI
*
* @param \WpOrg\Requests\Iri $uri URI to check
* @return boolean Whether the cookie is valid for the given URI
*/
public function uri_matches(Iri $uri) {
if (!$this->domain_matches($uri->host)) {
return false;
}
if (!$this->path_matches($uri->path)) {
return false;
}
return empty($this->attributes['secure']) || $uri->scheme === 'https';
}
/**
* Check if a cookie is valid for a given domain
*
* @param string $domain Domain to check
* @return boolean Whether the cookie is valid for the given domain
*/
public function domain_matches($domain) {
if (is_string($domain) === false) {
return false;
}
if (!isset($this->attributes['domain'])) {
// Cookies created manually; cookies created by Requests will set
// the domain to the requested domain
return true;
}
$cookie_domain = $this->attributes['domain'];
if ($cookie_domain === $domain) {
// The cookie domain and the passed domain are identical.
return true;
}
// If the cookie is marked as host-only and we don't have an exact
// match, reject the cookie
if ($this->flags['host-only'] === true) {
return false;
}
if (strlen($domain) <= strlen($cookie_domain)) {
// For obvious reasons, the cookie domain cannot be a suffix if the passed domain
// is shorter than the cookie domain
return false;
}
if (substr($domain, -1 * strlen($cookie_domain)) !== $cookie_domain) {
// The cookie domain should be a suffix of the passed domain.
return false;
}
$prefix = substr($domain, 0, strlen($domain) - strlen($cookie_domain));
if (substr($prefix, -1) !== '.') {
// The last character of the passed domain that is not included in the
// domain string should be a %x2E (".") character.
return false;
}
// The passed domain should be a host name (i.e., not an IP address).
return !preg_match('#^(.+\.)\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $domain);
}
/**
* Check if a cookie is valid for a given path
*
* From the path-match check in RFC 6265 section 5.1.4
*
* @param string $request_path Path to check
* @return boolean Whether the cookie is valid for the given path
*/
public function path_matches($request_path) {
if (empty($request_path)) {
// Normalize empty path to root
$request_path = '/';
}
if (!isset($this->attributes['path'])) {
// Cookies created manually; cookies created by Requests will set
// the path to the requested path
return true;
}
if (is_scalar($request_path) === false) {
return false;
}
$cookie_path = $this->attributes['path'];
if ($cookie_path === $request_path) {
// The cookie-path and the request-path are identical.
return true;
}
if (strlen($request_path) > strlen($cookie_path) && substr($request_path, 0, strlen($cookie_path)) === $cookie_path) {
if (substr($cookie_path, -1) === '/') {
// The cookie-path is a prefix of the request-path, and the last
// character of the cookie-path is %x2F ("/").
return true;
}
if (substr($request_path, strlen($cookie_path), 1) === '/') {
// The cookie-path is a prefix of the request-path, and the
// first character of the request-path that is not included in
// the cookie-path is a %x2F ("/") character.
return true;
}
}
return false;
}
/**
* Normalize cookie and attributes
*
* @return boolean Whether the cookie was successfully normalized
*/
public function normalize() {
foreach ($this->attributes as $key => $value) {
$orig_value = $value;
if (is_string($key)) {
$value = $this->normalize_attribute($key, $value);
}
if ($value === null) {
unset($this->attributes[$key]);
continue;
}
if ($value !== $orig_value) {
$this->attributes[$key] = $value;
}
}
return true;
}
/**
* Parse an individual cookie attribute
*
* Handles parsing individual attributes from the cookie values.
*
* @param string $name Attribute name
* @param string|int|bool $value Attribute value (string/integer value, or true if empty/flag)
* @return mixed Value if available, or null if the attribute value is invalid (and should be skipped)
*/
protected function normalize_attribute($name, $value) {
switch (strtolower($name)) {
case 'expires':
// Expiration parsing, as per RFC 6265 section 5.2.1
if (is_int($value)) {
return $value;
}
$expiry_time = strtotime($value);
if ($expiry_time === false) {
return null;
}
return $expiry_time;
case 'max-age':
// Expiration parsing, as per RFC 6265 section 5.2.2
if (is_int($value)) {
return $value;
}
// Check that we have a valid age
if (!preg_match('/^-?\d+$/', $value)) {
return null;
}
$delta_seconds = (int) $value;
if ($delta_seconds <= 0) {
$expiry_time = 0;
} else {
$expiry_time = $this->reference_time + $delta_seconds;
}
return $expiry_time;
case 'domain':
// Domains are not required as per RFC 6265 section 5.2.3
if (empty($value)) {
return null;
}
// Domain normalization, as per RFC 6265 section 5.2.3
if ($value[0] === '.') {
$value = substr($value, 1);
}
return $value;
default:
return $value;
}
}
/**
* Format a cookie for a Cookie header
*
* This is used when sending cookies to a server.
*
* @return string Cookie formatted for Cookie header
*/
public function format_for_header() {
return sprintf('%s=%s', $this->name, $this->value);
}
/**
* Format a cookie for a Set-Cookie header
*
* This is used when sending cookies to clients. This isn't really
* applicable to client-side usage, but might be handy for debugging.
*
* @return string Cookie formatted for Set-Cookie header
*/
public function format_for_set_cookie() {
$header_value = $this->format_for_header();
if (!empty($this->attributes)) {
$parts = [];
foreach ($this->attributes as $key => $value) {
// Ignore non-associative attributes
if (is_numeric($key)) {
$parts[] = $value;
} else {
$parts[] = sprintf('%s=%s', $key, $value);
}
}
$header_value .= '; ' . implode('; ', $parts);
}
return $header_value;
}
/**
* Parse a cookie string into a cookie object
*
* Based on Mozilla's parsing code in Firefox and related projects, which
* is an intentional deviation from RFC 2109 and RFC 2616. RFC 6265
* specifies some of this handling, but not in a thorough manner.
*
* @param string $cookie_header Cookie header value (from a Set-Cookie header)
* @param string $name
* @param int|null $reference_time
* @return \WpOrg\Requests\Cookie Parsed cookie object
*
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $cookie_header argument is not a string.
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $name argument is not a string.
*/
public static function parse($cookie_header, $name = '', $reference_time = null) {
if (is_string($cookie_header) === false) {
throw InvalidArgument::create(1, '$cookie_header', 'string', gettype($cookie_header));
}
if (is_string($name) === false) {
throw InvalidArgument::create(2, '$name', 'string', gettype($name));
}
$parts = explode(';', $cookie_header);
$kvparts = array_shift($parts);
if (!empty($name)) {
$value = $cookie_header;
} elseif (strpos($kvparts, '=') === false) {
// Some sites might only have a value without the equals separator.
// Deviate from RFC 6265 and pretend it was actually a blank name
// (`=foo`)
//
// https://bugzilla.mozilla.org/show_bug.cgi?id=169091
$name = '';
$value = $kvparts;
} else {
list($name, $value) = explode('=', $kvparts, 2);
}
$name = trim($name);
$value = trim($value);
// Attribute keys are handled case-insensitively
$attributes = new CaseInsensitiveDictionary();
if (!empty($parts)) {
foreach ($parts as $part) {
if (strpos($part, '=') === false) {
$part_key = $part;
$part_value = true;
} else {
list($part_key, $part_value) = explode('=', $part, 2);
$part_value = trim($part_value);
}
$part_key = trim($part_key);
$attributes[$part_key] = $part_value;
}
}
return new static($name, $value, $attributes, [], $reference_time);
}
/**
* Parse all Set-Cookie headers from request headers
*
* @param \WpOrg\Requests\Response\Headers $headers Headers to parse from
* @param \WpOrg\Requests\Iri|null $origin URI for comparing cookie origins
* @param int|null $time Reference time for expiration calculation
* @return array
*
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed $origin argument is not null or an instance of the Iri class.
*/
public static function parse_from_headers(Headers $headers, $origin = null, $time = null) {
$cookie_headers = $headers->getValues('Set-Cookie');
if (empty($cookie_headers)) {
return [];
}
if ($origin !== null && !($origin instanceof Iri)) {
throw InvalidArgument::create(2, '$origin', Iri::class . ' or null', gettype($origin));
}
$cookies = [];
foreach ($cookie_headers as $header) {
$parsed = self::parse($header, '', $time);
// Default domain/path attributes
if (empty($parsed->attributes['domain']) && !empty($origin)) {
$parsed->attributes['domain'] = $origin->host;
$parsed->flags['host-only'] = true;
} else {
$parsed->flags['host-only'] = false;
}
$path_is_valid = (!empty($parsed->attributes['path']) && $parsed->attributes['path'][0] === '/');
if (!$path_is_valid && !empty($origin)) {
$path = $origin->path;
// Default path normalization as per RFC 6265 section 5.1.4
if (substr($path, 0, 1) !== '/') {
// If the uri-path is empty or if the first character of
// the uri-path is not a %x2F ("/") character, output
// %x2F ("/") and skip the remaining steps.
$path = '/';
} elseif (substr_count($path, '/') === 1) {
// If the uri-path contains no more than one %x2F ("/")
// character, output %x2F ("/") and skip the remaining
// step.
$path = '/';
} else {
// Output the characters of the uri-path from the first
// character up to, but not including, the right-most
// %x2F ("/").
$path = substr($path, 0, strrpos($path, '/'));
}
$parsed->attributes['path'] = $path;
}
// Reject invalid cookie domains
if (!empty($origin) && !$parsed->domain_matches($origin->host)) {
continue;
}
$cookies[$parsed->name] = $parsed;
}
return $cookies;
}
}
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