<?php /** * Cookie storage object * * @package Requests * @subpackage Cookies */ /** * Cookie storage object * * @package Requests * @subpackage Cookies */ class Requests_Cookie { /** * Cookie name. * * @var string */ public $name; /** * Cookie value. * * @var string */ public $value; /** * Cookie attributes * * Valid keys are (currently) path, domain, expires, max-age, secure and * httponly. * * @var Requests_Utility_CaseInsensitiveDictionary|array Array-like object */ public $attributes = array(); /** * Cookie flags * * Valid keys are (currently) creation, last-access, persistent and * host-only. * * @var array */ public $flags = array(); /** * 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 * @param string $value * @param array|Requests_Utility_CaseInsensitiveDictionary $attributes Associative array of attribute data */ public function __construct($name, $value, $attributes = array(), $flags = array(), $reference_time = null) { $this->name = $name; $this->value = $value; $this->attributes = $attributes; $default_flags = array( '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(); } /** * 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 Requests_IRI $uri URI to check * @return boolean Whether the cookie is valid for the given URI */ public function uri_matches(Requests_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 $string Domain to check * @return boolean Whether the cookie is valid for the given domain */ public function domain_matches($string) { if (!isset($this->attributes['domain'])) { // Cookies created manually; cookies created by Requests will set // the domain to the requested domain return true; } $domain_string = $this->attributes['domain']; if ($domain_string === $string) { // The domain string and the string are identical. return true; } // If the cookie is marked as host-only and we don't have an exact // match, reject the cookie if ($this->flags['host-only'] === true) { return false; } if (strlen($string) <= strlen($domain_string)) { // For obvious reasons, the string cannot be a suffix if the domain // is shorter than the domain string return false; } if (substr($string, -1 * strlen($domain_string)) !== $domain_string) { // The domain string should be a suffix of the string. return false; } $prefix = substr($string, 0, strlen($string) - strlen($domain_string)); if (substr($prefix, -1) !== '.') { // The last character of the string that is not included in the // domain string should be a %x2E (".") character. return false; } // The string should be a host name (i.e., not an IP address). return !preg_match('#^(.+\.)\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $string); } /** * 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; } $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; $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|boolean $value Attribute value (string value, or true if empty/flag) * @return mixed Value if available, or null if the attribute value is invalid (and should be skipped) */ protected function normalize_attribute($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 Cookie header * * @codeCoverageIgnore * @deprecated Use {@see Requests_Cookie::format_for_header} * @return string */ public function formatForHeader() { return $this->format_for_header(); } /** * 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)) { $parts = array(); foreach ($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; } /** * Format a cookie for a Set-Cookie header * * @codeCoverageIgnore * @deprecated Use {@see Requests_Cookie::format_for_set_cookie} * @return string */ public function formatForSetCookie() { return $this->format_for_set_cookie(); } /** * Get the cookie value * * Attributes and other data can be accessed via methods. */ public function __toString() { return $this->value; } /** * Parse a cookie string into a cookie object * * Based on Mozilla's parsing code in Firefox and related projects, which * is an intentional deviation from RFC 2109 and RFC 2616. RFC 6265 * specifies some of this handling, but not in a thorough manner. * * @param string Cookie header value (from a Set-Cookie header) * @return Requests_Cookie Parsed cookie object */ public static function parse($string, $name = '', $reference_time = null) { $parts = explode(';', $string); $kvparts = array_shift($parts); if (!empty($name)) { $value = $string; } elseif (strpos($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 key are handled case-insensitively $attributes = new Requests_Utility_CaseInsensitiveDictionary(); if (!empty($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] = $part_value; } } return new Requests_Cookie($name, $value, $attributes, array(), $reference_time); } /** * Parse all Set-Cookie headers from request headers * * @param Requests_Response_Headers $headers Headers to parse from * @param Requests_IRI|null $origin URI for comparing cookie origins * @param int|null $time Reference time for expiration calculation * @return array */ public static function parse_from_headers(Requests_Response_Headers $headers, Requests_IRI $origin = null, $time = null) { $cookie_headers = $headers->getValues('Set-Cookie'); if (empty($cookie_headers)) { return array(); } $cookies = array(); foreach ($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; } /** * Parse all Set-Cookie headers from request headers * * @codeCoverageIgnore * @deprecated Use {@see Requests_Cookie::parse_from_headers} * @return string */ public static function parseFromHeaders(Requests_Response_Headers $headers) { return self::parse_from_headers($headers); } }

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