update live stub

[mdref/mdref-http] / http.stub.php

<?php
/**
 * Extended HTTP support. Again.
 * 
 * * Introduces the http namespace.
 * * PHP stream based message bodies.
 * * Encapsulated env request/response.
 * * Modular client support.
 */
namespace http;
use http;
/**
 * The HTTP client. See http\Client\Curl's [options](http/Client/Curl#Options:) which is the only driver currently supported.
 */
class Client implements \SplSubject, \Countable {
        /**
         * Debug callback's $data contains human readable text.
         */
        const DEBUG_INFO = 0;
        /**
         * Debug callback's $data contains data received.
         */
        const DEBUG_IN = 1;
        /**
         * Debug callback's $data contains data sent.
         */
        const DEBUG_OUT = 2;
        /**
         * Debug callback's $data contains headers.
         */
        const DEBUG_HEADER = 16;
        /**
         * Debug callback's $data contains a body part.
         */
        const DEBUG_BODY = 32;
        /**
         * Debug callback's $data contains SSL data.
         */
        const DEBUG_SSL = 64;
        /**
         * Attached observers.
         * 
         * @private
         * @var \SplObjectStorage
         */
        private $observers = NULL;
        /**
         * Set options.
         * 
         * @protected
         * @var array
         */
        protected $options = NULL;
        /**
         * Request/response history.
         * 
         * @protected
         * @var \http\Message
         */
        protected $history = NULL;
        /**
         * Whether to record history in http\Client::$history.
         * 
         * @public
         * @var bool
         */
        public $recordHistory = false;
        /**
         * Create a new HTTP client.
         * 
         * Currently only "curl" is supported as a $driver, and used by default.
         * Persisted resources identified by $persistent_handle_id will be re-used if available.
         * 
         * @param string $driver The HTTP client driver to employ. Currently only the default driver, "curl", is supported.
         * @param string $persistent_handle_id If supplied, created curl handles will be persisted with this identifier for later reuse.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @throws \http\Exception\RuntimeException
         */
        function __construct(string $driver = NULL, string $persistent_handle_id = NULL) {}
        /**
         * Add custom cookies.
         * See http\Client::setCookies().
         * 
         * @param array $cookies Custom cookies to add.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function addCookies(array $cookies = NULL) {}
        /**
         * Add specific SSL options.
         * See http\Client::setSslOptions(), http\Client::setOptions() and http\Client\Curl\$ssl options.
         * 
         * @param array $ssl_options Add this SSL options.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function addSslOptions(array $ssl_options = NULL) {}
        /**
         * Implements SplSubject. Attach another observer.
         * Attached observers will be notified with progress of each transfer.
         * 
         * @param \SplObserver $observer An implementation of SplObserver.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         */
        function attach(\SplObserver $observer) {}
        /**
         * Configure the client's low level options.
         * 
         * > ***NOTE:***
         * > This method has been added in v2.3.0.
         * 
         * @param array $configuration Key/value pairs of low level options.
         *    See f.e. the [configuration options for the Curl driver](http/Client/Curl#Configuration:).
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         */
        function configure(array $configuration) {}
        /**
         * Implements Countable. Retrieve the number of enqueued requests.
         * 
         * > ***NOTE:***
         * > The enqueued requests are counted without regard whether they are finished or not.
         * 
         * @return int number of enqueued requests.
         */
        function count() {}
        /**
         * Dequeue the http\Client\Request $request.
         * 
         * See http\Client::requeue(), if you want to requeue the request, instead of calling http\Client::dequeue() and then http\Client::enqueue().
         * 
         * @param \http\Client\Request $request The request to cancel.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @throws \http\Exception\RuntimeException
         * @return \http\Client self.
         */
        function dequeue(\http\Client\Request $request) {}
        /**
         * Implements SplSubject. Detach $observer, which has been previously attached.
         * 
         * @param \SplObserver $observer Previously attached instance of SplObserver implementation.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         */
        function detach(\SplObserver $observer) {}
        /**
         * Enable usage of an event library like libevent, which might improve performance with big socket sets.
         * 
         * > ***NOTE:***
         * > This method has been deprecated in 2.3.0, please use http\Client::configure() instead.
         * 
         * @param bool $enable Whether to enable libevent usage.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         * @deprecated
         */
        function enableEvents(bool $enable = true) {}
        /**
         * Enable sending pipelined requests to the same host if the driver supports it.
         * 
         * > ***NOTE:***
         * > This method has been deprecated in 2.3.0, please use http\Client::configure() instead.
         * 
         * @param bool $enable Whether to enable pipelining.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         * @deprecated
         */
        function enablePipelining(bool $enable = true) {}
        /**
         * Add another http\Client\Request to the request queue.
         * If the optional callback $cb returns true, the request will be automatically dequeued.
         * 
         * > ***Note:***
         * > The http\Client\Response object resulting from the request is always stored
         * > internally to be retrieved at a later time, __even__ when $cb is used.
         * >
         * > If you are about to send a lot of requests and do __not__ need the response
         * > after executing the callback, you can use http\Client::getResponse() within
         * > the callback to keep the memory usage level as low as possible.
         * 
         * See http\Client::dequeue() and http\Client::send().
         * 
         * @param \http\Client\Request $request The request to enqueue.
         * @param callable $cb as function(\http\Response $response) : ?bool
         *   A callback to automatically call when the request has finished.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @throws \http\Exception\RuntimeException
         * @return \http\Client self.
         */
        function enqueue(\http\Client\Request $request, callable $cb = NULL) {}
        /**
         * Get a list of available configuration options and their default values.
         * 
         * See f.e. the [configuration options for the Curl driver](http/Client/Curl#Configuration:).
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return array list of key/value pairs of available configuration options and their default values.
         */
        function getAvailableConfiguration() {}
        /**
         * List available drivers.
         * 
         * @return array list of supported drivers.
         */
        function getAvailableDrivers() {}
        /**
         * Retrieve a list of available request options and their default values.
         * 
         * See f.e. the [request options for the Curl driver](http/Client/Curl#Options:).
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return array list of key/value pairs of available request options and their default values.
         */
        function getAvailableOptions() {}
        /**
         * Get priorly set custom cookies.
         * See http\Client::setCookies().
         * 
         * @return array custom cookies.
         */
        function getCookies() {}
        /**
         * Simply returns the http\Message chain representing the request/response history.
         * 
         * > ***NOTE:***
         * > The history is only recorded while http\Client::$recordHistory is true.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Message the request/response message chain representing the client's history.
         */
        function getHistory() {}
        /**
         * Returns the SplObjectStorage holding attached observers.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \SplObjectStorage observer storage.
         */
        function getObservers() {}
        /**
         * Get priorly set options.
         * See http\Client::setOptions().
         * 
         * @return array options.
         */
        function getOptions() {}
        /**
         * Retrieve the progress information for $request.
         * 
         * @param \http\Client\Request $request The request to retrieve the current progress information for.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return object|NULL object stdClass instance holding progress information.
         *               or NULL if $request is not enqueued.
         */
        function getProgressInfo(\http\Client\Request $request) {}
        /**
         * Retrieve the corresponding response of an already finished request, or the last received response if $request is not set.
         * 
         * > ***NOTE:***
         * > If $request is NULL, then the response is removed from the internal storage (stack-like operation).
         * 
         * @param \http\Client\Request $request The request to fetch the stored response for.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client\Response|NULL \http\Client\Response the stored response for the request, or the last that was received.
         *               or NULL if no more response was available to pop, when no $request was given.
         */
        function getResponse(\http\Client\Request $request = NULL) {}
        /**
         * Retrieve priorly set SSL options.
         * See http\Client::getOptions() and http\Client::setSslOptions().
         * 
         * @return array SSL options.
         */
        function getSslOptions() {}
        /**
         * Get transfer related information for a running or finished request.
         * 
         * @param \http\Client\Request $request The request to probe for transfer info.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return object stdClass instance holding transfer related information.
         */
        function getTransferInfo(\http\Client\Request $request) {}
        /**
         * Implements SplSubject. Notify attached observers about progress with $request.
         * 
         * @param \http\Client\Request $request The request to notify about.
         * @param object $progress stdClass instance holding progress information.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client self.
         */
        function notify(\http\Client\Request $request = NULL, $progress = NULL) {}
        /**
         * Perform outstanding transfer actions.
         * See http\Client::wait() for the completing interface.
         * 
         * @return bool true if there are more transfers to complete.
         */
        function once() {}
        /**
         * Requeue an http\Client\Request.
         * 
         * The difference simply is, that this method, in contrast to http\Client::enqueue(), does not throw an http\Exception when the request to queue is already enqueued and dequeues it automatically prior enqueueing it again.
         * 
         * @param \http\Client\Request $request The request to queue.
         * @param callable $cb as function(\http\Response $response) : ?bool
         *   A callback to automatically call when the request has finished.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         * @return \http\Client self.
         */
        function requeue(\http\Client\Request $request, callable $cb = NULL) {}
        /**
         * Reset the client to the initial state.
         * 
         * @return \http\Client self.
         */
        function reset() {}
        /**
         * Send all enqueued requests.
         * See http\Client::once() and http\Client::wait() for a more fine grained interface.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         * @return \http\Client self.
         */
        function send() {}
        /**
         * Set custom cookies.
         * See http\Client::addCookies() and http\Client::getCookies().
         * 
         * @param array $cookies Set the custom cookies to this array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function setCookies(array $cookies = NULL) {}
        /**
         * Set client debugging callback.
         * 
         * > ***NOTE:***
         * > This method has been added in v2.6.0, resp. v3.1.0.
         * 
         * @param callable $callback as function(http\Client $c, http\Client\Request $r, int $type, string $data)
         *   The debug callback. For $type see http\Client::DEBUG_* constants.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function setDebug(callable $callback) {}
        /**
         * Set client options.
         * See http\Client\Curl.
         * 
         * > ***NOTE:***
         * > Only options specified prior enqueueing a request are applied to the request.
         * 
         * @param array $options The options to set.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function setOptions(array $options = NULL) {}
        /**
         * Specifically set SSL options.
         * See http\Client::setOptions() and http\Client\Curl\$ssl options.
         * 
         * @param array $ssl_options Set SSL options to this array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client self.
         */
        function setSslOptions(array $ssl_options = NULL) {}
        /**
         * Wait for $timeout seconds for transfers to provide data.
         * This is the completion call to http\Client::once().
         * 
         * @param float $timeout Seconds to wait for data on open sockets.
         * @return bool success.
         */
        function wait(float $timeout = 0) {}
}
/**
 * A class representing a list of cookies with specific attributes.
 */
class Cookie  {
        /**
         * Do not decode cookie contents.
         */
        const PARSE_RAW = 1;
        /**
         * The cookies' flags have the secure attribute set.
         */
        const SECURE = 16;
        /**
         * The cookies' flags have the httpOnly attribute set.
         */
        const HTTPONLY = 32;
        /**
         * Create a new cookie list.
         * 
         * @param mixed $cookies The string or list of cookies to parse or set.
         * @param int $flags Parse flags. See http\Cookie::PARSE_* constants.
         * @param array $allowed_extras List of extra attribute names to recognize.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         */
        function __construct($cookies = NULL, int $flags = 0, array $allowed_extras = NULL) {}
        /**
         * String cast handler. Alias of http\Cookie::toString().
         * 
         * @return string the cookie(s) represented as string.
         */
        function __toString() {}
        /**
         * Add a cookie.
         * See http\Cookie::setCookie() and http\Cookie::addCookies().
         * 
         * @param string $cookie_name The key of the cookie.
         * @param string $cookie_value The value of the cookie.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function addCookie(string $cookie_name, string $cookie_value) {}
        /**
         * (Re)set the cookies.
         * See http\Cookie::setCookies().
         * 
         * @param array $cookies Add cookies of this array of form ["name" => "value"].
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function addCookies(array $cookies) {}
        /**
         * Add an extra attribute to the cookie list.
         * See http\Cookie::setExtra().
         * 
         * @param string $extra_name The key of the extra attribute.
         * @param string $extra_value The value of the extra attribute.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function addExtra(string $extra_name, string $extra_value) {}
        /**
         * Add several extra attributes.
         * See http\Cookie::addExtra().
         * 
         * @param array $extras A list of extra attributes of the form ["key" => "value"].
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function addExtras(array $extras) {}
        /**
         * Retrieve a specific cookie value.
         * See http\Cookie::setCookie().
         * 
         * @param string $cookie_name The key of the cookie to look up.
         * @return string|NULL string the cookie value.
         *               or NULL if $cookie_name could not be found.
         */
        function getCookie(string $cookie_name) {}
        /**
         * Get the list of cookies.
         * See http\Cookie::setCookies().
         * 
         * @return array the list of cookies of form ["name" => "value"].
         */
        function getCookies() {}
        /**
         * Retrieve the effective domain of the cookie list.
         * See http\Cookie::setDomain().
         * 
         * @return string the effective domain.
         */
        function getDomain() {}
        /**
         * Get the currently set expires attribute.
         * See http\Cookie::setExpires().
         * 
         * > ***NOTE:***
         * > A return value of -1 means that the attribute is not set.
         * 
         * @return int the currently set expires attribute as seconds since the epoch.
         */
        function getExpires() {}
        /**
         * Retrieve an extra attribute.
         * See http\Cookie::setExtra().
         * 
         * @param string $name The key of the extra attribute.
         * @return string the value of the extra attribute.
         */
        function getExtra(string $name) {}
        /**
         * Retrieve the list of extra attributes.
         * See http\Cookie::setExtras().
         * 
         * @return array the list of extra attributes of the form ["key" => "value"].
         */
        function getExtras() {}
        /**
         * Get the currently set flags.
         * See http\Cookie::SECURE and http\Cookie::HTTPONLY constants.
         * 
         * @return int the currently set flags bitmask.
         */
        function getFlags() {}
        /**
         * Get the currently set max-age attribute of the cookie list.
         * See http\Cookie::setMaxAge().
         * 
         * > ***NOTE:***
         * > A return value of -1 means that the attribute is not set.
         * 
         * @return int the currently set max-age.
         */
        function getMaxAge() {}
        /**
         * Retrieve the path the cookie(s) of this cookie list are effective at.
         * See http\Cookie::setPath().
         * 
         * @return string the effective path.
         */
        function getPath() {}
        /**
         * (Re)set a cookie.
         * See http\Cookie::addCookie() and http\Cookie::setCookies().
         * 
         * > ***NOTE:***
         * > The cookie will be deleted from the list if $cookie_value is NULL.
         * 
         * @param string $cookie_name The key of the cookie.
         * @param string $cookie_value The value of the cookie.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setCookie(string $cookie_name, string $cookie_value) {}
        /**
         * (Re)set the cookies.
         * See http\Cookie::addCookies().
         * 
         * @param array $cookies Set the cookies to this array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setCookies(array $cookies = NULL) {}
        /**
         * Set the effective domain of the cookie list.
         * See http\Cookie::setPath().
         * 
         * @param string $value The domain the cookie(s) belong to.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setDomain(string $value = NULL) {}
        /**
         * Set the traditional expires timestamp.
         * See http\Cookie::setMaxAge() for a safer alternative.
         * 
         * @param int $value The expires timestamp as seconds since the epoch.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setExpires(int $value = -1) {}
        /**
         * (Re)set an extra attribute.
         * See http\Cookie::addExtra().
         * 
         * > ***NOTE:***
         * > The attribute will be removed from the extras list if $extra_value is NULL.
         * 
         * @param string $extra_name The key of the extra attribute.
         * @param string $extra_value The value of the extra attribute.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setExtra(string $extra_name, string $extra_value = NULL) {}
        /**
         * (Re)set the extra attributes.
         * See http\Cookie::addExtras().
         * 
         * @param array $extras Set the extra attributes to this array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setExtras(array $extras = NULL) {}
        /**
         * Set the flags to specified $value.
         * See http\Cookie::SECURE and http\Cookie::HTTPONLY constants.
         * 
         * @param int $value The new flags bitmask.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setFlags(int $value = 0) {}
        /**
         * Set the maximum age the cookie may have on the client side.
         * This is a client clock departure safe alternative to the "expires" attribute.
         * See http\Cookie::setExpires().
         * 
         * @param int $value The max-age in seconds.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setMaxAge(int $value = -1) {}
        /**
         * Set the path the cookie(s) of this cookie list should be effective at.
         * See http\Cookie::setDomain().
         * 
         * @param string $path The URL path the cookie(s) should take effect within.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Cookie self.
         */
        function setPath(string $path = NULL) {}
        /**
         * Get the cookie list as array.
         * 
         * @return array the cookie list as array.
         */
        function toArray() {}
        /**
         * Retrieve the string representation of the cookie list.
         * See http\Cookie::toArray().
         * 
         * @return string the cookie list as string.
         */
        function toString() {}
}
/**
 * 
 */
namespace http\Encoding;
namespace http;
/**
 * The http\Env class provides static methods to manipulate and inspect the server's current request's HTTP environment.
 */
class Env  {
        /**
         * Retrieve the current HTTP request's body.
         * 
         * @param string $body_class_name A user class extending http\Message\Body.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Message\Body instance representing the request body
         */
        function getRequestBody(string $body_class_name = NULL) {}
        /**
         * Retrieve one or all headers of the current HTTP request.
         * 
         * @param string $header_name The key of a header to retrieve.
         * @return NULL|string|array NULL if $header_name was not found
         *               or string the compound header when $header_name was found
         *               or array of all headers if $header_name was not specified
         */
        function getRequestHeader(string $header_name = NULL) {}
        /**
         * Get the HTTP response code to send.
         * 
         * @return int the HTTP response code.
         */
        function getResponseCode() {}
        /**
         * Get one or all HTTP response headers to be sent.
         * 
         * @param string $header_name The name of the response header to retrieve.
         * @return string|NULL|array string the compound value of the response header to send
         *               or NULL if the header was not found
         *               or array of all response headers, if $header_name was not specified
         */
        function getResponseHeader(string $header_name = NULL) {}
        /**
         * Retrieve a list of all known HTTP response status.
         * 
         * @return array mapping of the form \[
         *   ...
         *   int $code => string $status
         *   ...
         *   \]
         */
        function getResponseStatusForAllCodes() {}
        /**
         * Retrieve the string representation of specified HTTP response code.
         * 
         * @param int $code The HTTP response code to get the string representation for.
         * @return string the HTTP response status message (may be empty, if no message for this code was found)
         */
        function getResponseStatusForCode(int $code) {}
        /**
         * Generic negotiator. For specific client negotiation see http\Env::negotiateContentType() and related methods.
         * 
         * > ***NOTE:***
         * > The first element of $supported serves as a default if no operand matches.
         * 
         * @param string $params HTTP header parameter's value to negotiate.
         * @param array $supported List of supported negotiation operands.
         * @param string $prim_typ_sep A "primary type separator", i.e. that would be a hyphen for content language negotiation (en-US, de-DE, etc.).
         * @param array $result Out parameter recording negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the closest match negotiated, or the default (first entry of $supported).
         */
        function negotiate(string $params, array $supported, string $prim_typ_sep = NULL, array &$result = NULL) {}
        /**
         * Negotiate the client's preferred character set.
         * 
         * > ***NOTE:***
         * > The first element of $supported character sets serves as a default if no character set matches.
         * 
         * @param array $supported List of supported content character sets.
         * @param array $result Out parameter recording negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the negotiated character set.
         */
        function negotiateCharset(array $supported, array &$result = NULL) {}
        /**
         * Negotiate the client's preferred MIME content type.
         * 
         * > ***NOTE:***
         * > The first element of $supported content types serves as a default if no content-type matches.
         * 
         * @param array $supported List of supported MIME content types.
         * @param array $result Out parameter recording negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the negotiated content type.
         */
        function negotiateContentType(array $supported, array &$result = NULL) {}
        /**
         * Negotiate the client's preferred encoding.
         * 
         * > ***NOTE:***
         * > The first element of $supported encodings serves as a default if no encoding matches.
         * 
         * @param array $supported List of supported content encodings.
         * @param array $result Out parameter recording negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the negotiated encoding.
         */
        function negotiateEncoding(array $supported, array &$result = NULL) {}
        /**
         * Negotiate the client's preferred language.
         * 
         * > ***NOTE:***
         * > The first element of $supported languages serves as a default if no language matches.
         * 
         * @param array $supported List of supported content languages.
         * @param array $result Out parameter recording negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the negotiated language.
         */
        function negotiateLanguage(array $supported, array &$result = NULL) {}
        /**
         * Set the HTTP response code to send.
         * 
         * @param int $code The HTTP response status code.
         * @return bool Success.
         */
        function setResponseCode(int $code) {}
        /**
         * Set a response header, either replacing a prior set header, or appending the new header value, depending on $replace.
         * 
         * If no $header_value is specified, or $header_value is NULL, then a previously set header with the same key will be deleted from the list.
         * 
         * If $response_code is not 0, the response status code is updated accordingly.
         * 
         * @param string $header_name
         * @param mixed $header_value
         * @param int $response_code
         * @param bool $replace
         * @return bool Success.
         */
        function setResponseHeader(string $header_name, $header_value = NULL, int $response_code = NULL, bool $replace = NULL) {}
}
/**
 * The http extension's Exception interface.
 * 
 * Use it to catch any Exception thrown by pecl/http.
 * 
 * The individual exception classes extend their equally named native PHP extensions, if such exist, and implement this empty interface. For example the http\Exception\BadMethodCallException extends SPL's BadMethodCallException.
 */
interface Exception  {
}
/**
 * The http\Header class provides methods to manipulate, match, negotiate and serialize HTTP headers.
 */
class Header implements \Serializable {
        /**
         * None of the following match constraints applies.
         */
        const MATCH_LOOSE = 0;
        /**
         * Perform case sensitive matching.
         */
        const MATCH_CASE = 1;
        /**
         * Match only on word boundaries (according by CType alpha-numeric).
         */
        const MATCH_WORD = 16;
        /**
         * Match the complete string.
         */
        const MATCH_FULL = 32;
        /**
         * Case sensitively match the full string (same as MATCH_CASE|MATCH_FULL).
         */
        const MATCH_STRICT = 33;
        /**
         * The name of the HTTP header.
         * 
         * @public
         * @var string
         */
        public $name = NULL;
        /**
         * The value of the HTTP header.
         * 
         * @public
         * @var mixed
         */
        public $value = NULL;
        /**
         * Create an http\Header instance for use of simple matching or negotiation. If the value of the header is an array it may be compounded to a single comma separated string.
         * 
         * @param string $name The HTTP header name.
         * @param mixed $value The value of the header.
         * 
         * # Throws:
         */
        function __construct(string $name = NULL, $value = NULL) {}
        /**
         * String cast handler. Alias of http\Header::serialize().
         * 
         * @return string the serialized form of the HTTP header (i.e. "Name: value").
         */
        function __toString() {}
        /**
         * Create a parameter list out of the HTTP header value.
         * 
         * @param mixed $ps The parameter separator(s).
         * @param mixed $as The argument separator(s).
         * @param mixed $vs The value separator(s).
         * @param int $flags The modus operandi. See http\Params constants.
         * @return \http\Params instance
         */
        function getParams($ps = NULL, $as = NULL, $vs = NULL, int $flags = NULL) {}
        /**
         * Match the HTTP header's value against provided $value according to $flags.
         * 
         * @param string $value The comparison value.
         * @param int $flags The modus operandi. See http\Header constants.
         * @return bool whether $value matches the header value according to $flags.
         */
        function match(string $value, int $flags = NULL) {}
        /**
         * Negotiate the header's value against a list of supported values in $supported.
         * Negotiation operation is adopted according to the header name, i.e. if the
         * header being negotiated is Accept, then a slash is used as primary type
         * separator, and if the header is Accept-Language respectively, a hyphen is
         * used instead.
         * 
         * > ***NOTE:***
         * > The first element of $supported serves as a default if no operand matches.
         * 
         * @param array $supported The list of supported values to negotiate.
         * @param array $result Out parameter recording the negotiation results.
         * @return NULL|string NULL if negotiation fails.
         *               or string the closest match negotiated, or the default (first entry of $supported).
         */
        function negotiate(array $supported, array &$result = NULL) {}
        /**
         * Parse HTTP headers.
         * See also http\Header\Parser.
         * 
         * @param string $header The complete string of headers.
         * @param string $header_class A class extending http\Header.
         * @return array|false array of parsed headers, where the elements are instances of $header_class if specified.
         *               or false if parsing fails.
         */
        function parse(string $header, string $header_class = NULL) {}
        /**
         * Implements Serializable.
         * 
         * @return string serialized representation of HTTP header (i.e. "Name: value")
         */
        function serialize() {}
        /**
         * Convenience method. Alias of http\Header::serialize().
         * 
         * @return string the serialized form of the HTTP header (i.e. "Name: value").
         */
        function toString() {}
        /**
         * Implements Serializable.
         * 
         * @param string $serialized The serialized HTTP header (i.e. "Name: value")
         */
        function unserialize($serialized) {}
}
/**
 * The message class builds the foundation for any request and response message.
 * 
 * See http\Client\Request and http\Client\Response, as well as http\Env\Request and http\Env\Response.
 */
class Message implements \Countable, \Serializable, \Iterator {
        /**
         * No specific type of message.
         */
        const TYPE_NONE = 0;
        /**
         * A request message.
         */
        const TYPE_REQUEST = 1;
        /**
         * A response message.
         */
        const TYPE_RESPONSE = 2;
        /**
         * The message type. See http\Message::TYPE_* constants.
         * 
         * @protected
         * @var int
         */
        protected $type = \http\Message::TYPE_NONE;
        /**
         * The message's body.
         * 
         * @protected
         * @var \http\Message\Body
         */
        protected $body = NULL;
        /**
         * The request method if the message is of type request.
         * 
         * @protected
         * @var string
         */
        protected $requestMethod = "";
        /**
         * The request url if the message is of type request.
         * 
         * @protected
         * @var string
         */
        protected $requestUrl = "";
        /**
         * The response status phrase if the message is of type response.
         * 
         * @protected
         * @var string
         */
        protected $responseStatus = "";
        /**
         * The response code if the message is of type response.
         * 
         * @protected
         * @var int
         */
        protected $responseCode = 0;
        /**
         * A custom HTTP protocol version.
         * 
         * @protected
         * @var string
         */
        protected $httpVersion = NULL;
        /**
         * Any message headers.
         * 
         * @protected
         * @var array
         */
        protected $headers = NULL;
        /**
         * Any parent message.
         * 
         * @protected
         * @var \http\Message
         */
        protected $parentMessage;
        /**
         * Create a new HTTP message.
         * 
         * @param mixed $message Either a resource or a string, representing the HTTP message.
         * @param bool $greedy Whether to read from a $message resource until EOF.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMessageException
         */
        function __construct($message = NULL, bool $greedy = true) {}
        /**
         * Retrieve the message serialized to a string.
         * Alias of http\Message::toString().
         * 
         * @return string the single serialized HTTP message.
         */
        function __toString() {}
        /**
         * Append the data of $body to the message's body.
         * See http\Message::setBody() and http\Message\Body::append().
         * 
         * @param \http\Message\Body $body The message body to add.
         * @return \http\Message self.
         */
        function addBody(\http\Message\Body $body) {}
        /**
         * Add an header, appending to already existing headers.
         * See http\Message::addHeaders() and http\Message::setHeader().
         * 
         * @param string $name The header name.
         * @param mixed $value The header value.
         * @return \http\Message self.
         */
        function addHeader(string $name, $value) {}
        /**
         * Add headers, optionally appending values, if header keys already exist.
         * See http\Message::addHeader() and http\Message::setHeaders().
         * 
         * @param array $headers The HTTP headers to add.
         * @param bool $append Whether to append values for existing headers.
         * @return \http\Message self.
         */
        function addHeaders(array $headers, bool $append = false) {}
        /**
         * Implements Countable.
         * 
         * @return int the count of messages in the chain above the current message.
         */
        function count() {}
        /**
         * Implements iterator.
         * See http\Message::valid() and http\Message::rewind().
         * 
         * @return \http\Message the current message in the iterated message chain.
         */
        function current() {}
        /**
         * Detach a clone of this message from any message chain.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Message clone.
         */
        function detach() {}
        /**
         * Retrieve the message's body.
         * See http\Message::setBody().
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Message\Body the message body.
         */
        function getBody() {}
        /**
         * Retrieve a single header, optionally hydrated into a http\Header extending class.
         * 
         * @param string $header The header's name.
         * @param string $into_class The name of a class extending http\Header.
         * @return mixed|\http\Header mixed the header value if $into_class is NULL.
         *               or \http\Header descendant.
         */
        function getHeader(string $header, string $into_class = NULL) {}
        /**
         * Retrieve all message headers.
         * See http\Message::setHeaders() and http\Message::getHeader().
         * 
         * @return array the message's headers.
         */
        function getHeaders() {}
        /**
         * Retrieve the HTTP protocol version of the message.
         * See http\Message::setHttpVersion().
         * 
         * @return string the HTTP protocol version, e.g. "1.0"; defaults to "1.1".
         */
        function getHttpVersion() {}
        /**
         * Retrieve the first line of a request or response message.
         * See http\Message::setInfo and also:
         * 
         * * http\Message::getType()
         * * http\Message::getHttpVersion()
         * * http\Message::getResponseCode()
         * * http\Message::getResponseStatus()
         * * http\Message::getRequestMethod()
         * * http\Message::getRequestUrl()
         * 
         * @return string|NULL string the HTTP message information.
         *               or NULL if the message is neither of type request nor response.
         */
        function getInfo() {}
        /**
         * Retrieve any parent message.
         * See http\Message::reverse().
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @return \http\Message the parent message.
         */
        function getParentMessage() {}
        /**
         * Retrieve the request method of the message.
         * See http\Message::setRequestMethod() and http\Message::getRequestUrl().
         * 
         * @return string|false string the request method.
         *               or false if the message was not of type request.
         */
        function getRequestMethod() {}
        /**
         * Retrieve the request URL of the message.
         * See http\Message::setRequestUrl().
         * 
         * @return string|false string the request URL; usually the path and the querystring.
         *               or false if the message was not of type request.
         */
        function getRequestUrl() {}
        /**
         * Retrieve the response code of the message.
         * See http\Message::setResponseCode() and http\Message::getResponseStatus().
         * 
         * @return int|false int the response status code.
         *               or false if the message is not of type response.
         */
        function getResponseCode() {}
        /**
         * Retrieve the response status of the message.
         * See http\Message::setResponseStatus() and http\Message::getResponseCode().
         * 
         * @return string|false string the response status phrase.
         *               or false if the message is not of type response.
         */
        function getResponseStatus() {}
        /**
         * Retrieve the type of the message.
         * See http\Message::setType() and http\Message::getInfo().
         * 
         * @return int the message type. See http\Message::TYPE_* constants.
         */
        function getType() {}
        /**
         * Check whether this message is a multipart message based on it's content type.
         * If the message is a multipart message and a reference $boundary is given, the boundary string of the multipart message will be stored in $boundary.
         * 
         * See http\Message::splitMultipartBody().
         * 
         * @param string $boundary A reference where the boundary string will be stored.
         * @return bool whether this is a message with a multipart "Content-Type".
         */
        function isMultipart(string &$boundary = NULL) {}
        /**
         * Implements Iterator.
         * See http\Message::current() and http\Message::rewind().
         * 
         * @return int a non-sequential integer key.
         */
        function key() {}
        /**
         * Implements Iterator.
         * See http\Message::valid() and http\Message::rewind().
         */
        function next() {}
        /**
         * Prepend message(s) $message to this message, or the top most message of this message chain.
         * 
         * > ***NOTE:***
         * > The message chains must not overlap.
         * 
         * @param \http\Message $message The message (chain) to prepend as parent messages.
         * @param bool $top Whether to prepend to the top-most parent message.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Message self.
         */
        function prepend(\http\Message $message, bool $top = true) {}
        /**
         * Reverse the message chain and return the former top-most message.
         * 
         * > ***NOTE:***
         * > Message chains are ordered in reverse-parsed order by default, i.e. the last parsed message is the message you'll receive from any call parsing HTTP messages.
         * >
         * > This call re-orders the messages of the chain and returns the message that was parsed first with any later parsed messages re-parentized.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Message the other end of the message chain.
         */
        function reverse() {}
        /**
         * Implements Iterator.
         */
        function rewind() {}
        /**
         * Implements Serializable.
         * 
         * @return string the serialized HTTP message.
         */
        function serialize() {}
        /**
         * Set the message's body.
         * See http\Message::getBody() and http\Message::addBody().
         * 
         * @param \http\Message\Body $body The new message body.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Message self.
         */
        function setBody(\http\Message\Body $body) {}
        /**
         * Set a single header.
         * See http\Message::getHeader() and http\Message::addHeader().
         * 
         * > ***NOTE:***
         * > Prior to v2.5.6/v3.1.0 headers with the same name were merged into a single
         * > header with values concatenated by comma.
         * 
         * @param string $header The header's name.
         * @param mixed $value The header's value. Removes the header if NULL.
         * @return \http\Message self.
         */
        function setHeader(string $header, $value = NULL) {}
        /**
         * Set the message headers.
         * See http\Message::getHeaders() and http\Message::addHeaders().
         * 
         * > ***NOTE:***
         * > Prior to v2.5.6/v3.1.0 headers with the same name were merged into a single
         * > header with values concatenated by comma.
         * 
         * @param array $headers The message's headers.
         * @return \http\Message null.
         */
        function setHeaders(array $headers = NULL) {}
        /**
         * Set the HTTP protocol version of the message.
         * See http\Message::getHttpVersion().
         * 
         * @param string $http_version The protocol version, e.g. "1.1", optionally prefixed by "HTTP/".
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadHeaderException
         * @return \http\Message self.
         */
        function setHttpVersion(string $http_version) {}
        /**
         * Set the complete message info, i.e. type and response resp. request information, at once.
         * See http\Message::getInfo().
         * 
         * @param string $http_info The message info (first line of an HTTP message).
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadHeaderException
         * @return \http\Message self.
         */
        function setInfo(string $http_info) {}
        /**
         * Set the request method of the message.
         * See http\Message::getRequestMethod() and http\Message::setRequestUrl().
         * 
         * @param string $method The request method.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @return \http\Message self.
         */
        function setRequestMethod(string $method) {}
        /**
         * Set the request URL of the message.
         * See http\Message::getRequestUrl() and http\Message::setRequestMethod().
         * 
         * @param string $url The request URL.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @return \http\Message self.
         */
        function setRequestUrl(string $url) {}
        /**
         * Set the response status code.
         * See http\Message::getResponseCode() and http\Message::setResponseStatus().
         * 
         * > ***NOTE:***
         * > This method also resets the response status phrase to the default for that code.
         * 
         * @param int $response_code The response code.
         * @param bool $strict Whether to check that the response code is between 100 and 599 inclusive.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @return \http\Message self.
         */
        function setResponseCode(int $response_code, bool $strict = true) {}
        /**
         * Set the response status phrase.
         * See http\Message::getResponseStatus() and http\Message::setResponseCode().
         * 
         * @param string $response_status The status phrase.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @return \http\Message self.
         */
        function setResponseStatus(string $response_status) {}
        /**
         * Set the message type and reset the message info.
         * See http\Message::getType() and http\Message::setInfo().
         * 
         * @param int $type The desired message type. See the http\Message::TYPE_* constants.
         * @return \http\Message self.
         */
        function setType(int $type) {}
        /**
         * Splits the body of a multipart message.
         * See http\Message::isMultipart() and http\Message\Body::addPart().
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @throws \http\Exception\BadMessageException
         * @return \http\Message a message chain of all messages of the multipart body.
         */
        function splitMultipartBody() {}
        /**
         * Stream the message through a callback.
         * 
         * @param callable $callback The callback of the form function(http\Message $from, string $data).
         * @return \http\Message self.
         */
        function toCallback(callable $callback) {}
        /**
         * Stream the message into stream $stream, starting from $offset, streaming $maxlen at most.
         * 
         * @param resource $stream The resource to write to.
         * @return \http\Message self.
         */
        function toStream($stream) {}
        /**
         * Retrieve the message serialized to a string.
         * 
         * @param bool $include_parent Whether to include all parent messages.
         * @return string the HTTP message chain serialized to a string.
         */
        function toString(bool $include_parent = false) {}
        /**
         * Implements Serializable.
         * 
         * @param string $data The serialized message.
         */
        function unserialize($data) {}
        /**
         * Implements Iterator.
         * See http\Message::current() and http\Message::rewind().
         * 
         * @return bool whether http\Message::current() would not return NULL.
         */
        function valid() {}
}
/**
 * Parse, interpret and compose HTTP (header) parameters.
 */
class Params implements \ArrayAccess {
        /**
         * The default parameter separator (",").
         */
        const DEF_PARAM_SEP = ',';
        /**
         * The default argument separator (";").
         */
        const DEF_ARG_SEP = ';';
        /**
         * The default value separator ("=").
         */
        const DEF_VAL_SEP = '=';
        /**
         * Empty param separator to parse cookies.
         */
        const COOKIE_PARAM_SEP = '';
        /**
         * Do not interpret the parsed parameters.
         */
        const PARSE_RAW = 0;
        /**
         * Interpret input as default formatted parameters.
         */
        const PARSE_DEFAULT = 17;
        /**
         * Parse backslash escaped (quoted) strings.
         */
        const PARSE_ESCAPED = 1;
        /**
         * Urldecode single units of parameters, arguments and values.
         */
        const PARSE_URLENCODED = 4;
        /**
         * Parse sub dimensions indicated by square brackets.
         */
        const PARSE_DIMENSION = 8;
        /**
         * Parse URL querystring (same as http\Params::PARSE_URLENCODED|http\Params::PARSE_DIMENSION).
         */
        const PARSE_QUERY = 12;
        /**
         * Parse [RFC5987](http://tools.ietf.org/html/rfc5987) style encoded character set and language information embedded in HTTP header params.
         */
        const PARSE_RFC5987 = 16;
        /**
         * Parse [RFC5988](http://tools.ietf.org/html/rfc5988) (Web Linking) tags of Link headers.
         */
        const PARSE_RFC5988 = 32;
        /**
         * The (parsed) parameters.
         * 
         * @public
         * @var array
         */
        public $params = NULL;
        /**
         * The parameter separator(s).
         * 
         * @public
         * @var array
         */
        public $param_sep = \http\Params::DEF_PARAM_SEP;
        /**
         * The argument separator(s).
         * 
         * @public
         * @var array
         */
        public $arg_sep = \http\Params::DEF_ARG_SEP;
        /**
         * The value separator(s).
         * 
         * @public
         * @var array
         */
        public $val_sep = \http\Params::DEF_VAL_SEP;
        /**
         * The modus operandi of the parser. See http\Params::PARSE_* constants.
         * 
         * @public
         * @var int
         */
        public $flags = \http\Params::PARSE_DEFAULT;
        /**
         * Instantiate a new HTTP (header) parameter set.
         * 
         * @param mixed $params Pre-parsed parameters or a string to be parsed.
         * @param mixed $ps The parameter separator(s).
         * @param mixed $as The argument separator(s).
         * @param mixed $vs The value separator(s).
         * @param int $flags The modus operandi. See http\Params::PARSE_* constants.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         */
        function __construct($params = NULL, $ps = NULL, $as = NULL, $vs = NULL, int $flags = NULL) {}
        /**
         * String cast handler. Alias of http\Params::toString().
         * Returns a stringified version of the parameters.
         * 
         * @return string version of the parameters.
         */
        function __toString() {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to look after.
         * @return bool Existence.
         */
        function offsetExists($name) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to retrieve.
         * @return mixed contents at offset.
         */
        function offsetGet($name) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to modify.
         * @param mixed $value The value to set.
         */
        function offsetSet($name, $value) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to delete.
         */
        function offsetUnset($name) {}
        /**
         * Convenience method that simply returns http\Params::$params.
         * 
         * @return array of parameters.
         */
        function toArray() {}
        /**
         * Returns a stringified version of the parameters.
         * 
         * @return string version of the parameters.
         */
        function toString() {}
}
/**
 * The http\QueryString class provides versatile facilities to retrieve, use and manipulate query strings and form data.
 */
class QueryString implements \Serializable, \ArrayAccess, \IteratorAggregate {
        /**
         * Cast requested value to bool.
         */
        const TYPE_BOOL = 16;
        /**
         * Cast requested value to int.
         */
        const TYPE_INT = 4;
        /**
         * Cast requested value to float.
         */
        const TYPE_FLOAT = 5;
        /**
         * Cast requested value to string.
         */
        const TYPE_STRING = 6;
        /**
         * Cast requested value to an array.
         */
        const TYPE_ARRAY = 7;
        /**
         * Cast requested value to an object.
         */
        const TYPE_OBJECT = 8;
        /**
         * The global instance. See http\QueryString::getGlobalInstance().
         * 
         * @private
         * @var \http\QueryString
         */
        private $instance = NULL;
        /**
         * The data.
         * 
         * @private
         * @var array
         */
        private $queryArray = NULL;
        /**
         * Create an independent querystring instance.
         * 
         * @param mixed $params The query parameters to use or parse.
         * @throws \http\Exception\BadQueryStringException
         */
        function __construct($params = NULL) {}
        /**
         * Get the string representation of the querystring (x-www-form-urlencoded).
         * 
         * @return string the x-www-form-urlencoded querystring.
         */
        function __toString() {}
        /**
         * Retrieve an querystring value.
         * 
         * See http\QueryString::TYPE_* constants.
         * 
         * @param string $name The key to retrieve the value for.
         * @param mixed $type The type to cast the value to. See http\QueryString::TYPE_* constants.
         * @param mixed $defval The default value to return if the key $name does not exist.
         * @param bool $delete Whether to delete the entry from the querystring after retrieval.
         * @return \http\QueryString|string|mixed|mixed|string \http\QueryString if called without arguments.
         *               or string the whole querystring if $name is of zero length.
         *               or mixed $defval if the key $name does not exist.
         *               or mixed the querystring value cast to $type if $type was specified and the key $name exists.
         *               or string the querystring value if the key $name exists and $type is not specified or equals http\QueryString::TYPE_STRING.
         */
        function get(string $name = NULL, $type = NULL, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve an array value with at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return array|mixed array the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getArray(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve a boolean value at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return bool|mixed bool the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getBool(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve a float value at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return float|mixed float the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getFloat(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve the global querystring instance referencing $_GET.
         * 
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\QueryString the http\QueryString::$instance
         */
        function getGlobalInstance() {}
        /**
         * Retrieve a int value at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return int|mixed int the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getInt(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Implements IteratorAggregate.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \InvalidArgumentException
         */
        function getIterator() {}
        /**
         * Retrieve a object value with at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return object|mixed object the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getObject(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve a string value with at offset $name.
         * 
         * @param string $name The key to look up.
         * @param mixed $defval The default value to return if the offset $name does not exist.
         * @param bool $delete Whether to remove the key and value from the querystring after retrieval.
         * @return string|mixed string the (casted) value.
         *               or mixed $defval if offset $name does not exist.
         */
        function getString(string $name, $defval = NULL, bool $delete = false) {}
        /**
         * Set additional $params to a clone of this instance.
         * See http\QueryString::set().
         * 
         * > ***NOTE:***
         * > This method returns a clone (copy) of this instance.
         * 
         * @param mixed $params Additional params as object, array or string to parse.
         * @throws \http\Exception\BadQueryStringException
         * @return \http\QueryString clone.
         */
        function mod($params = NULL) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to look up.
         * @return bool whether the key $name isset.
         */
        function offsetExists($name) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param mixed $offset The offset to look up.
         * @return mixed|NULL mixed the value locate at offset $name.
         *               or NULL if key $name could not be found.
         */
        function offsetGet($offset) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The key to set the value for.
         * @param mixed $data The data to place at offset $name.
         */
        function offsetSet($name, $data) {}
        /**
         * Implements ArrayAccess.
         * 
         * @param string $name The offset to look up.
         */
        function offsetUnset($name) {}
        /**
         * Implements Serializable.
         * See http\QueryString::toString().
         * 
         * @return string the x-www-form-urlencoded querystring.
         */
        function serialize() {}
        /**
         * Set additional querystring entries.
         * 
         * @param mixed $params Additional params as object, array or string to parse.
         * @return \http\QueryString self.
         */
        function set($params) {}
        /**
         * Simply returns http\QueryString::$queryArray.
         * 
         * @return array the $queryArray property.
         */
        function toArray() {}
        /**
         * Get the string representation of the querystring (x-www-form-urlencoded).
         * 
         * @return string the x-www-form-urlencoded querystring.
         */
        function toString() {}
        /**
         * Implements Serializable.
         * 
         * @param string $serialized The x-www-form-urlencoded querystring.
         * @throws \http\Exception
         */
        function unserialize($serialized) {}
        /**
         * Translate character encodings of the querystring with ext/iconv.
         * 
         * > ***NOTE:***
         * > This method is only available when ext/iconv support was enabled at build time.
         * 
         * @param string $from_enc The encoding to convert from.
         * @param string $to_enc The encoding to convert to.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadConversionException
         * @return \http\QueryString self.
         */
        function xlate(string $from_enc, string $to_enc) {}
}
/**
 * The http\Url class provides versatile means to parse, construct and manipulate URLs.
 */
class Url  {
        /**
         * Replace parts of the old URL with parts of the new.
         */
        const REPLACE = 0;
        /**
         * Whether a relative path should be joined into the old path.
         */
        const JOIN_PATH = 1;
        /**
         * Whether the querystrings should be joined.
         */
        const JOIN_QUERY = 2;
        /**
         * Strip the user information from the URL.
         */
        const STRIP_USER = 4;
        /**
         * Strip the password from the URL.
         */
        const STRIP_PASS = 8;
        /**
         * Strip user and password information from URL (same as STRIP_USER|STRIP_PASS).
         */
        const STRIP_AUTH = 12;
        /**
         * Do not include the port.
         */
        const STRIP_PORT = 32;
        /**
         * Do not include the URL path.
         */
        const STRIP_PATH = 64;
        /**
         * Do not include the URL querystring.
         */
        const STRIP_QUERY = 128;
        /**
         * Strip the fragment (hash) from the URL.
         */
        const STRIP_FRAGMENT = 256;
        /**
         * Strip everything except scheme and host information.
         */
        const STRIP_ALL = 492;
        /**
         * Import initial URL parts from the SAPI environment.
         */
        const FROM_ENV = 4096;
        /**
         * Whether to sanitize the URL path (consolidate double slashes, directory jumps etc.)
         */
        const SANITIZE_PATH = 8192;
        /**
         * Parse UTF-8 encoded multibyte sequences.
         */
        const PARSE_MBUTF8 = 131072;
        /**
         * Parse locale encoded multibyte sequences (on systems with wide character support).
         */
        const PARSE_MBLOC = 65536;
        /**
         * Parse and convert multibyte hostnames according to IDNA (with IDNA support).
         */
        const PARSE_TOIDN = 1048576;
        /**
         * Explicitly request IDNA2003 implementation if available (libidn, idnkit or ICU).
         */
        const PARSE_TOIDN_2003 = 9437184;
        /**
         * Explicitly request IDNA2008 implementation if available (libidn2, idnkit2 or ICU).
         */
        const PARSE_TOIDN_2008 = 5242880;
        /**
         * Percent encode multibyte sequences in the userinfo, path, query and fragment parts of the URL.
         */
        const PARSE_TOPCT = 2097152;
        /**
         * Continue parsing when encountering errors.
         */
        const IGNORE_ERRORS = 268435456;
        /**
         * Suppress errors/exceptions.
         */
        const SILENT_ERRORS = 536870912;
        /**
         * Standard flags used by default internally for e.g. http\Message::setRequestUrl().
         *   Enables joining path and query, sanitizing path, multibyte/unicode, international domain names and transient percent encoding.
         */
        const STDFLAGS = 3350531;
        /**
         * The URL's scheme.
         * 
         * @public
         * @var string
         */
        public $scheme = NULL;
        /**
         * Authenticating user.
         * 
         * @public
         * @var string
         */
        public $user = NULL;
        /**
         * Authentication password.
         * 
         * @public
         * @var string
         */
        public $pass = NULL;
        /**
         * Hostname/domain.
         * 
         * @public
         * @var string
         */
        public $host = NULL;
        /**
         * Port.
         * 
         * @public
         * @var string
         */
        public $port = NULL;
        /**
         * URL path.
         * 
         * @public
         * @var string
         */
        public $path = NULL;
        /**
         * URL querystring.
         * 
         * @public
         * @var string
         */
        public $query = NULL;
        /**
         * URL fragment (hash).
         * 
         * @public
         * @var string
         */
        public $fragment = NULL;
        /**
         * Create an instance of an http\Url.
         * 
         * > ***NOTE:***
         * > Prior to v3.0.0, the default for the $flags parameter was http\Url::FROM_ENV.
         * 
         * See also http\Env\Url.
         * 
         * @param mixed $old_url Initial URL parts. Either an array, object, http\Url instance or string to parse.
         * @param mixed $new_url Overriding URL parts. Either an array, object, http\Url instance or string to parse.
         * @param int $flags The modus operandi of constructing the url. See http\Url constants.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadUrlException
         */
        function __construct($old_url = NULL, $new_url = NULL, int $flags = 0) {}
        /**
         * String cast handler. Alias of http\Url::toString().
         * 
         * @return string the URL as string.
         */
        function __toString() {}
        /**
         * Clone this URL and apply $parts to the cloned URL.
         * 
         * > ***NOTE:***
         * > This method returns a clone (copy) of this instance.
         * 
         * @param mixed $parts New URL parts.
         * @param int $flags Modus operandi of URL construction. See http\Url constants.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadUrlException
         * @return \http\Url clone.
         */
        function mod($parts, int $flags = \http\Url::JOIN_PATH|http\Url::JOIN_QUERY|http\Url::SANITIZE_PATH) {}
        /**
         * Retrieve the URL parts as array.
         * 
         * @return array the URL parts.
         */
        function toArray() {}
        /**
         * Get the string prepresentation of the URL.
         * 
         * @return string the URL as string.
         */
        function toString() {}
}
/**
 * The http\Client\Curl namespace holds option value constants specific to the curl driver of the http\Client.
 */
namespace http\Client\Curl;
/**
 * Bitmask of available libcurl features.
 *   See http\Client\Curl\Features namespace.
 */
const FEATURES = 4179869;
/**
 * List of library versions of or linked into libcurl,
 *   e.g. "libcurl/7.50.0 OpenSSL/1.0.2h zlib/1.2.8 libidn/1.32 nghttp2/1.12.0".
 *   See http\Client\Curl\Versions namespace.
 */
const VERSIONS = 'libcurl/7.64.0 OpenSSL/1.1.1d zlib/1.2.11 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) libssh2/1.8.0 nghttp2/1.36.0 librtmp/2.3';
/**
 * Use HTTP/1.0 protocol version.
 */
const HTTP_VERSION_1_0 = 1;
/**
 * Use HTTP/1.1 protocol version.
 */
const HTTP_VERSION_1_1 = 2;
/**
 * Attempt to use HTTP/2 protocol version. Available if libcurl is v7.33.0 or more recent and was built with nghttp2 support.
 */
const HTTP_VERSION_2_0 = 3;
/**
 * Attempt to use version 2 for HTTPS, version 1.1 for HTTP. Available if libcurl is v7.47.0 or more recent and was built with nghttp2 support.
 */
const HTTP_VERSION_2TLS = 4;
/**
 * Use any HTTP protocol version.
 */
const HTTP_VERSION_ANY = 0;
/**
 * Use TLS v1.0 encryption.
 */
const SSL_VERSION_TLSv1_0 = 4;
/**
 * Use TLS v1.1 encryption.
 */
const SSL_VERSION_TLSv1_1 = 5;
/**
 * Use TLS v1.2 encryption.
 */
const SSL_VERSION_TLSv1_2 = 6;
/**
 * Use any TLS v1 encryption.
 */
const SSL_VERSION_TLSv1 = 1;
/**
 * Use SSL v2 encryption.
 */
const SSL_VERSION_SSLv2 = 2;
/**
 * Use SSL v3 encryption.
 */
const SSL_VERSION_SSLv3 = 3;
/**
 * Use any encryption.
 */
const SSL_VERSION_ANY = 0;
/**
 * Use TLS SRP authentication. Available if libcurl is v7.21.4 or more recent and was built with gnutls or openssl with TLS-SRP support.
 */
const TLSAUTH_SRP = 1;
/**
 * Use IPv4 resolver.
 */
const IPRESOLVE_V4 = 1;
/**
 * Use IPv6 resolver.
 */
const IPRESOLVE_V6 = 2;
/**
 * Use any resolver.
 */
const IPRESOLVE_ANY = 0;
/**
 * Use Basic authentication.
 */
const AUTH_BASIC = 1;
/**
 * Use Digest authentication.
 */
const AUTH_DIGEST = 2;
/**
 * Use IE (lower v7) quirks with Digest authentication. Available if libcurl is v7.19.3 or more recent.
 */
const AUTH_DIGEST_IE = 16;
/**
 * Use NTLM authentication.
 */
const AUTH_NTLM = 8;
/**
 * Use GSS-Negotiate authentication.
 */
const AUTH_GSSNEG = 4;
/**
 * Use HTTP Netgotiate authentication (SPNEGO, RFC4559). Available if libcurl is v7.38.0 or more recent.
 */
const AUTH_SPNEGO = 4;
/**
 * Use any authentication.
 */
const AUTH_ANY = -17;
/**
 * Use SOCKSv4 proxy protocol.
 */
const PROXY_SOCKS4 = 4;
/**
 * Use SOCKSv4a proxy protocol.
 */
const PROXY_SOCKS4A = 5;
/**
 * Use SOCKS5h proxy protocol.
 */
const PROXY_SOCKS5_HOSTNAME = 5;
/**
 * Use SOCKS5 proxy protoccol.
 */
const PROXY_SOCKS5 = 5;
/**
 * Use HTTP/1.1 proxy protocol.
 */
const PROXY_HTTP = 0;
/**
 * Use HTTP/1.0 proxy protocol. Available if libcurl is v7.19.4 or more recent.
 */
const PROXY_HTTP_1_0 = 1;
/**
 * Keep POSTing on 301 redirects. Available if libcurl is v7.19.1 or more recent.
 */
const POSTREDIR_301 = 1;
/**
 * Keep POSTing on 302 redirects. Available if libcurl is v7.19.1 or more recent.
 */
const POSTREDIR_302 = 2;
/**
 * Keep POSTing on 303 redirects. Available if libcurl is v7.19.1 or more recent.
 */
const POSTREDIR_303 = 4;
/**
 * Keep POSTing on any redirect. Available if libcurl is v7.19.1 or more recent.
 */
const POSTREDIR_ALL = 7;
namespace http\Client;
/**
 * The http\Client\Request class provides an HTTP message implementation tailored to represent a request message to be sent by the client.
 * 
 * See http\Client::enqueue().
 */
class Request extends \http\Message {
        /**
         * Array of options for this request, which override client options.
         * 
         * @protected
         * @var array
         */
        protected $options = NULL;
        /**
         * Create a new client request message to be enqueued and sent by http\Client.
         * 
         * @param string $meth The request method.
         * @param string $url The request URL.
         * @param array $headers HTTP headers.
         * @param \http\Message\Body $body Request body.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         */
        function __construct(string $meth = NULL, string $url = NULL, array $headers = NULL, \http\Message\Body $body = NULL) {}
        /**
         * Add querystring data.
         * See http\Client\Request::setQuery() and http\Message::setRequestUrl().
         * 
         * @param mixed $query_data Additional querystring data.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadQueryStringException
         * @return \http\Client\Request self.
         */
        function addQuery($query_data) {}
        /**
         * Add specific SSL options.
         * See http\Client\Request::setSslOptions(), http\Client\Request::setOptions() and http\Client\Curl\$ssl options.
         * 
         * @param array $ssl_options Add this SSL options.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client\Request self.
         */
        function addSslOptions(array $ssl_options = NULL) {}
        /**
         * Extract the currently set "Content-Type" header.
         * See http\Client\Request::setContentType().
         * 
         * @return string|NULL string the currently set content type.
         *               or NULL if no "Content-Type" header is set.
         */
        function getContentType() {}
        /**
         * Get priorly set options.
         * See http\Client\Request::setOptions().
         * 
         * @return array options.
         */
        function getOptions() {}
        /**
         * Retrieve the currently set querystring.
         * 
         * @return string|NULL string the currently set querystring.
         *               or NULL if no querystring is set.
         */
        function getQuery() {}
        /**
         * Retrieve priorly set SSL options.
         * See http\Client\Request::getOptions() and http\Client\Request::setSslOptions().
         * 
         * @return array SSL options.
         */
        function getSslOptions() {}
        /**
         * Set the MIME content type of the request message.
         * 
         * @param string $content_type The MIME type used as "Content-Type".
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Client\Request self.
         */
        function setContentType(string $content_type) {}
        /**
         * Set client options.
         * See http\Client::setOptions() and http\Client\Curl.
         * 
         * Request specific options override general options which were set in the client.
         * 
         * > ***NOTE:***
         * > Only options specified prior enqueueing a request are applied to the request.
         * 
         * @param array $options The options to set.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client\Request self.
         */
        function setOptions(array $options = NULL) {}
        /**
         * (Re)set the querystring.
         * See http\Client\Request::addQuery() and http\Message::setRequestUrl().
         * 
         * @param mixed $query_data
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadQueryStringException
         * @return \http\Client\Request self.
         */
        function setQuery($query_data) {}
        /**
         * Specifically set SSL options.
         * See http\Client\Request::setOptions() and http\Client\Curl\$ssl options.
         * 
         * @param array $ssl_options Set SSL options to this array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Client\Request self.
         */
        function setSslOptions(array $ssl_options = NULL) {}
}
/**
 * The http\Client\Response class represents an HTTP message the client returns as answer from a server to an http\Client\Request.
 */
class Response extends \http\Message {
        /**
         * Extract response cookies.
         * Parses any "Set-Cookie" response headers into an http\Cookie list. See http\Cookie::__construct().
         * 
         * @param int $flags Cookie parser flags.
         * @param array $allowed_extras List of keys treated as extras.
         * @return array list of http\Cookie instances.
         */
        function getCookies(int $flags = 0, array $allowed_extras = NULL) {}
        /**
         * Retrieve transfer related information after the request has completed.
         * See http\Client::getTransferInfo().
         * 
         * @param string $name A key to retrieve out of the transfer info.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\BadMethodCallException
         * @throws \http\Exception\UnexpectedValueException
         * @return object|mixed object stdClass instance with all transfer info if $name was not given.
         *               or mixed the specific transfer info for $name.
         */
        function getTransferInfo(string $name = NULL) {}
}
namespace http\Client\Curl;
/**
 * Interface to an user event loop implementation for http\Client::configure()'s $use_eventloop option.
 * 
 * > ***NOTE:***
 * > This interface was added in v2.6.0, resp. v3.1.0.
 */
interface User  {
        /**
         * No action.
         */
        const POLL_NONE = 0;
        /**
         * Poll for read readiness.
         */
        const POLL_IN = 1;
        /**
         * Poll for write readiness.
         */
        const POLL_OUT = 2;
        /**
         * Poll for read/write readiness.
         */
        const POLL_INOUT = 3;
        /**
         * Stop polling for activity on this descriptor.
         */
        const POLL_REMOVE = 4;
        /**
         * Initialize the event loop.
         * 
         * @param callable $run as function(http\Client $c, resource $s = null, int $action = http\Client\Curl\User::POLL_NONE) : int
         *   Internal callback returning the number of unfinished requests pending.
         * 
         * 
         * > ***NOTE***:
         * > The callback should be run when a timeout occurs or a watched socket needs action.
         */
        function init(callable $run);
        /**
         * Run the loop as long as it does not block.
         * 
         * > ***NOTE:***
         * > This method is called by http\Client::once(), so it does not need to have an actual implementation if http\Client::once() is never called.
         */
        function once();
        /**
         * Run the loop.
         * 
         * > ***NOTE:***
         * > This method is called by http\Client::send(), so it does not need to have an actual implementation if http\Client::send() is never called.
         */
        function send();
        /**
         * Register (or deregister) a socket watcher.
         * 
         * @param resource $socket The socket descriptor to watch.
         * @param int $poll http\Client\Curl\User::POLL_* constant.
         */
        function socket($socket, int $poll);
        /**
         * Register a timeout watcher.
         * 
         * @param int $timeout_ms Desired maximum timeout in milliseconds.
         */
        function timer(int $timeout_ms);
        /**
         * Wait/poll/select (block the loop) until events fire.
         * 
         * > ***NOTE:***
         * > This method is called by http\Client::wait(), so it does not need to have an actual implementation if http\Client::wait() is never called.
         * 
         * @param int $timeout_ms Block for at most this milliseconds.
         */
        function wait(int $timeout_ms = null);
}
/**
 * CURL feature constants.
 * 
 * > ***NOTE:***
 * > These constants have been added in v2.6.0, resp. v3.1.0.
 */
namespace http\Client\Curl\Features;
/**
 * Whether libcurl supports asynchronous domain name resolution.
 */
const ASYNCHDNS = 128;
/**
 * Whether libcurl supports the Generic Security Services Application Program Interface. Available if libcurl is v7.38.0 or more recent.
 */
const GSSAPI = 131072;
/**
 * Whether libcurl supports HTTP Generic Security Services negotiation.
 */
const GSSNEGOTIATE = 32;
/**
 * Whether libcurl supports the HTTP/2 protocol. Available if libcurl is v7.33.0 or more recent.
 */
const HTTP2 = 65536;
/**
 * Whether libcurl supports international domain names.
 */
const IDN = 1024;
/**
 * Whether libcurl supports IPv6.
 */
const IPV6 = 1;
/**
 * Whether libcurl supports the old Kerberos protocol.
 */
const KERBEROS4 = 2;
/**
 * Whether libcurl supports the more recent Kerberos v5 protocol. Available if libcurl is v7.40.0 or more recent.
 */
const KERBEROS5 = 262144;
/**
 * Whether libcurl supports large files.
 */
const LARGEFILE = 512;
/**
 * Whether libcurl supports gzip/deflate compression.
 */
const LIBZ = 8;
/**
 * Whether libcurl supports the NT Lan Manager authentication.
 */
const NTLM = 16;
/**
 * Whether libcurl supports NTLM delegation to a winbind helper. Available if libcurl is v7.22.0 or more recent.
 */
const NTLM_WB = 32768;
/**
 * Whether libcurl supports the Public Suffix List for cookie host handling. Available if libcurl is v7.47.0 or more recent.
 */
const PSL = 1048576;
/**
 * Whether libcurl supports the Simple and Protected GSSAPI Negotiation Mechanism.
 */
const SPNEGO = 256;
/**
 * Whether libcurl supports SSL/TLS protocols.
 */
const SSL = 4;
/**
 * Whether libcurl supports the Security Support Provider Interface.
 */
const SSPI = 2048;
/**
 * Whether libcurl supports TLS Secure Remote Password authentication. Available if libcurl is v7.21.4 or more recent.
 */
const TLSAUTH_SRP = 16384;
/**
 * Whether libcurl supports connections to unix sockets. Available if libcurl is v7.40.0 or more recent.
 */
const UNIX_SOCKETS = 524288;
/**
 * CURL version constants.
 * 
 * > ***NOTE:***
 * > These constants have been added in v2.6.0, resp. v3.1.0.
 */
namespace http\Client\Curl\Versions;
/**
 * Version string of libcurl, e.g. "7.50.0".
 */
const CURL = '7.64.0';
/**
 * Version string of the SSL/TLS library, e.g. "OpenSSL/1.0.2h".
 */
const SSL = 'OpenSSL/1.1.1d';
/**
 * Version string of the zlib compression library, e.g. "1.2.8".
 */
const LIBZ = '1.2.11';
/**
 * Version string of the c-ares library, e.g. "1.11.0".
 */
const ARES = NULL;
/**
 * Version string of the IDN library, e.g. "1.32".
 */
const IDN = NULL;
namespace http\Encoding;
/**
 * Base class for encoding stream implementations.
 */
abstract class Stream  {
        /**
         * Do no intermittent flushes.
         */
        const FLUSH_NONE = 0;
        /**
         * Flush at appropriate transfer points.
         */
        const FLUSH_SYNC = 1048576;
        /**
         * Flush at each IO operation.
         */
        const FLUSH_FULL = 2097152;
        /**
         * Base constructor for encoding stream implementations.
         * 
         * @param int $flags See http\Encoding\Stream and implementation specific constants.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         */
        function __construct(int $flags = 0) {}
        /**
         * Check whether the encoding stream is already done.
         * 
         * @return bool whether the encoding stream is completed.
         */
        function done() {}
        /**
         * Finish and reset the encoding stream.
         * Returns any pending data.
         * 
         * @return string any pending data.
         */
        function finish() {}
        /**
         * Flush the encoding stream.
         * Returns any pending data.
         * 
         * @return string any pending data.
         */
        function flush() {}
        /**
         * Update the encoding stream with more input.
         * 
         * @param string $data The data to pass through the stream.
         * @return string processed data.
         */
        function update(string $data) {}
}
namespace http\Encoding\Stream;
/**
 * A [brotli](https://brotli.org) decoding stream.
 * 
 * > ***NOTE:***
 * > This class has been added in v3.2.0.
 */
class Debrotli extends \http\Encoding\Stream {
        /**
         * Decode brotli encoded data.
         * 
         * @param string $data The data to uncompress.
         * @return string the uncompressed data.
         */
        function decode(string $data) {}
}
/**
 * A stream decoding data encoded with chunked transfer encoding.
 */
class Dechunk extends \http\Encoding\Stream {
        /**
         * Decode chunked encoded data.
         * 
         * @param string $data The data to decode.
         * @param int $decoded_len Out parameter with the length of $data that's been decoded.
         *   Should be ```strlen($data)``` if not truncated.
         * @return string|string|string|false string the decoded data.
         *               or string the unencoded data.
         *               or string the truncated decoded data.
         *               or false if $data cannot be decoded.
         */
        function decode(string $data, int &$decoded_len = 0) {}
}
/**
 * A deflate stream supporting deflate, zlib and gzip encodings.
 */
class Deflate extends \http\Encoding\Stream {
        /**
         * Gzip encoding. RFC1952
         */
        const TYPE_GZIP = 16;
        /**
         * Zlib encoding. RFC1950
         */
        const TYPE_ZLIB = 0;
        /**
         * Deflate encoding. RFC1951
         */
        const TYPE_RAW = 32;
        /**
         * Default compression level.
         */
        const LEVEL_DEF = 0;
        /**
         * Least compression level.
         */
        const LEVEL_MIN = 1;
        /**
         * Greatest compression level.
         */
        const LEVEL_MAX = 9;
        /**
         * Default compression strategy.
         */
        const STRATEGY_DEF = 0;
        /**
         * Filtered compression strategy.
         */
        const STRATEGY_FILT = 256;
        /**
         * Huffman strategy only.
         */
        const STRATEGY_HUFF = 512;
        /**
         * Run-length encoding strategy.
         */
        const STRATEGY_RLE = 768;
        /**
         * Encoding with fixed Huffman codes only.
         * 
         * > **A note on the compression strategy:**
         * >
         * > The strategy parameter is used to tune the compression algorithm.
         * >
         * > Use the value DEFAULT_STRATEGY for normal data, FILTERED for data produced by a filter (or predictor), HUFFMAN_ONLY to force Huffman encoding only (no string match), or RLE to limit match distances to one (run-length encoding).
         * >
         * > Filtered data consists mostly of small values with a somewhat random distribution. In this case, the compression algorithm is tuned to compress them better. The effect of FILTERED is to force more Huffman coding and less string matching; it is somewhat intermediate between DEFAULT_STRATEGY and HUFFMAN_ONLY.
         * >
         * > RLE is designed to be almost as fast as HUFFMAN_ONLY, but give better compression for PNG image data.
         * >
         * > FIXED prevents the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.
         * >
         * > The strategy parameter only affects the compression ratio but not the correctness of the compressed output even if it is not set appropriately.
         * >
         * >_Source: [zlib Manual](http://www.zlib.net/manual.html)_
         */
        const STRATEGY_FIXED = 1024;
        /**
         * Encode data with deflate/zlib/gzip encoding.
         * 
         * @param string $data The data to compress.
         * @param int $flags Any compression tuning flags. See http\Encoding\Stream\Deflate and http\Encoding\Stream constants.
         * @return string the compressed data.
         */
        function encode(string $data, int $flags = 0) {}
}
/**
 * A [brotli](https://brotli.org) encoding stream.
 * 
 * > ***NOTE:***
 * > This class has been added in v3.2.0.
 */
class Enbrotli extends \http\Encoding\Stream {
        /**
         * Default compression level.
         */
        const LEVEL_DEF = NULL;
        /**
         * Least compression level.
         */
        const LEVEL_MIN = NULL;
        /**
         * Greatest compression level.
         */
        const LEVEL_MAX = NULL;
        /**
         * Default window bits.
         */
        const WBITS_DEF = NULL;
        /**
         * Minimum window bits.
         */
        const WBITS_MIN = NULL;
        /**
         * Maximum window bits.
         */
        const WBITS_MAX = NULL;
        /**
         * Default compression mode.
         */
        const MODE_GENERIC = NULL;
        /**
         * Compression mode for UTF-8 formatted text.
         */
        const MODE_TEXT = NULL;
        /**
         * Compression mode used in WOFF 2.0.
         */
        const MODE_FONT = NULL;
        /**
         * Encode data with brotli encoding.
         * 
         * @param string $data The data to compress.
         * @param int $flags Any compression tuning flags. See http\Encoding\Stream\Enbrotli and http\Encoding\Stream constants.
         * @return string the compressed data.
         */
        function encode(string $data, int $flags = 0) {}
}
/**
 * A inflate stream supporting deflate, zlib and gzip encodings.
 */
class Inflate extends \http\Encoding\Stream {
        /**
         * Decode deflate/zlib/gzip encoded data.
         * 
         * @param string $data The data to uncompress.
         * @return string the uncompressed data.
         */
        function decode(string $data) {}
}
namespace http\Env;
/**
 * The http\Env\Request class' instances represent the server's current HTTP request.
 * 
 * See http\Message for inherited members.
 */
class Request extends \http\Message {
        /**
         * The request's query parameters. ($_GET)
         * 
         * @protected
         * @var \http\QueryString
         */
        protected $query = NULL;
        /**
         * The request's form parameters. ($_POST)
         * 
         * @protected
         * @var \http\QueryString
         */
        protected $form = NULL;
        /**
         * The request's form uploads. ($_FILES)
         * 
         * @protected
         * @var array
         */
        protected $files = NULL;
        /**
         * The request's cookies. ($_COOKIE)
         * 
         * @protected
         * @var array
         */
        protected $cookie = NULL;
        /**
         * Create an instance of the server's current HTTP request.
         * 
         * Upon construction, the http\Env\Request acquires http\QueryString instances of query parameters ($\_GET) and form parameters ($\_POST).
         * 
         * It also compiles an array of uploaded files ($\_FILES) more comprehensive than the original $\_FILES array, see http\Env\Request::getFiles() for that matter.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         */
        function __construct() {}
        /**
         * Retrieve an URL query value ($_GET).
         * 
         * See http\QueryString::get() and http\QueryString::TYPE_* constants.
         * 
         * @param string $name The key to retrieve the value for.
         * @param mixed $type The type to cast the value to. See http\QueryString::TYPE_* constants.
         * @param mixed $defval The default value to return if the key $name does not exist.
         * @param bool $delete Whether to delete the entry from the querystring after retrieval.
         * @return \http\QueryString|string|mixed|mixed|string \http\QueryString if called without arguments.
         *               or string the whole querystring if $name is of zero length.
         *               or mixed $defval if the key $name does not exist.
         *               or mixed the querystring value cast to $type if $type was specified and the key $name exists.
         *               or string the querystring value if the key $name exists and $type is not specified or equals http\QueryString::TYPE_STRING.
         */
        function getCookie(string $name = NULL, $type = NULL, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve the uploaded files list ($_FILES).
         * 
         * @return array the consolidated upload files array.
         */
        function getFiles() {}
        /**
         * Retrieve a form value ($_POST).
         * 
         * See http\QueryString::get() and http\QueryString::TYPE_* constants.
         * 
         * @param string $name The key to retrieve the value for.
         * @param mixed $type The type to cast the value to. See http\QueryString::TYPE_* constants.
         * @param mixed $defval The default value to return if the key $name does not exist.
         * @param bool $delete Whether to delete the entry from the querystring after retrieval.
         * @return \http\QueryString|string|mixed|mixed|string \http\QueryString if called without arguments.
         *               or string the whole querystring if $name is of zero length.
         *               or mixed $defval if the key $name does not exist.
         *               or mixed the querystring value cast to $type if $type was specified and the key $name exists.
         *               or string the querystring value if the key $name exists and $type is not specified or equals http\QueryString::TYPE_STRING.
         */
        function getForm(string $name = NULL, $type = NULL, $defval = NULL, bool $delete = false) {}
        /**
         * Retrieve an URL query value ($_GET).
         * 
         * See http\QueryString::get() and http\QueryString::TYPE_* constants.
         * 
         * @param string $name The key to retrieve the value for.
         * @param mixed $type The type to cast the value to. See http\QueryString::TYPE_* constants.
         * @param mixed $defval The default value to return if the key $name does not exist.
         * @param bool $delete Whether to delete the entry from the querystring after retrieval.
         * @return \http\QueryString|string|mixed|mixed|string \http\QueryString if called without arguments.
         *               or string the whole querystring if $name is of zero length.
         *               or mixed $defval if the key $name does not exist.
         *               or mixed the querystring value cast to $type if $type was specified and the key $name exists.
         *               or string the querystring value if the key $name exists and $type is not specified or equals http\QueryString::TYPE_STRING.
         */
        function getQuery(string $name = NULL, $type = NULL, $defval = NULL, bool $delete = false) {}
}
/**
 * The http\Env\Response class' instances represent the server's current HTTP response.
 * 
 * See http\Message for inherited members.
 */
class Response extends \http\Message {
        /**
         * Do not use content encoding.
         */
        const CONTENT_ENCODING_NONE = 0;
        /**
         * Support "Accept-Encoding" requests with gzip and deflate encoding.
         */
        const CONTENT_ENCODING_GZIP = 1;
        /**
         * No caching info available.
         */
        const CACHE_NO = 0;
        /**
         * The cache was hit.
         */
        const CACHE_HIT = 1;
        /**
         * The cache was missed.
         */
        const CACHE_MISS = 2;
        /**
         * A request instance which overrides the environments default request.
         * 
         * @protected
         * @var \http\Env\Request
         */
        protected $request = NULL;
        /**
         * The response's MIME content type.
         * 
         * @protected
         * @var string
         */
        protected $contentType = NULL;
        /**
         * The response's MIME content disposition.
         * 
         * @protected
         * @var string
         */
        protected $contentDisposition = NULL;
        /**
         * See http\Env\Response::CONTENT_ENCODING_* constants.
         * 
         * @protected
         * @var int
         */
        protected $contentEncoding = NULL;
        /**
         * How the client should treat this response in regards to caching.
         * 
         * @protected
         * @var string
         */
        protected $cacheControl = NULL;
        /**
         * A custom ETag.
         * 
         * @protected
         * @var string
         */
        protected $etag = NULL;
        /**
         * A "Last-Modified" time stamp.
         * 
         * @protected
         * @var int
         */
        protected $lastModified = NULL;
        /**
         * Any throttling delay.
         * 
         * @protected
         * @var int
         */
        protected $throttleDelay = NULL;
        /**
         * The chunk to send every $throttleDelay seconds.
         * 
         * @protected
         * @var int
         */
        protected $throttleChunk = NULL;
        /**
         * The response's cookies.
         * 
         * @protected
         * @var array
         */
        protected $cookies = NULL;
        /**
         * Create a new env response message instance.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         */
        function __construct() {}
        /**
         * Output buffer handler.
         * Appends output data to the body.
         * 
         * @param string $data The data output.
         * @param int $ob_flags Output buffering flags passed from the output buffering control layer.
         * @return bool success.
         */
        function __invoke(string $data, int $ob_flags = 0) {}
        /**
         * Manually test the header $header_name of the environment's request for a cache hit.
         * http\Env\Response::send() checks that itself, though.
         * 
         * @param string $header_name The request header to test.
         * @return int a http\Env\Response::CACHE_* constant.
         */
        function isCachedByEtag(string $header_name = "If-None-Match") {}
        /**
         * Manually test the header $header_name of the environment's request for a cache hit.
         * http\Env\Response::send() checks that itself, though.
         * 
         * @param string $header_name The request header to test.
         * @return int a http\Env\Response::CACHE_* constant.
         */
        function isCachedByLastModified(string $header_name = "If-Modified-Since") {}
        /**
         * Send the response through the SAPI or $stream.
         * Flushes all output buffers.
         * 
         * @param resource $stream A writable stream to send the response through.
         * @return bool success.
         */
        function send($stream = NULL) {}
        /**
         * Make suggestions to the client how it should cache the response.
         * 
         * @param string $cache_control (A) "Cache-Control" header value(s).
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setCacheControl(string $cache_control) {}
        /**
         * Set the reponse's content disposition parameters.
         * 
         * @param array $disposition_params MIME content disposition as http\Params array.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setContentDisposition(array $disposition_params) {}
        /**
         * Enable support for "Accept-Encoding" requests with deflate or gzip.
         * The response will be compressed if the client indicates support and wishes that.
         * 
         * @param int $content_encoding See http\Env\Response::CONTENT_ENCODING_* constants.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setContentEncoding(int $content_encoding) {}
        /**
         * Set the MIME content type of the response.
         * 
         * @param string $content_type The response's content type.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setContentType(string $content_type) {}
        /**
         * Add cookies to the response to send.
         * 
         * @param mixed $cookie The cookie to send.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return \http\Env\Response self.
         */
        function setCookie($cookie) {}
        /**
         * Override the environment's request.
         * 
         * @param \http\Message $env_request The overriding request message.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setEnvRequest(\http\Message $env_request) {}
        /**
         * Set a custom ETag.
         * 
         * > ***NOTE:***
         * > This will be used for caching and pre-condition checks.
         * 
         * @param string $etag A ETag.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setEtag(string $etag) {}
        /**
         * Set a custom last modified time stamp.
         * 
         * > ***NOTE:***
         * > This will be used for caching and pre-condition checks.
         * 
         * @param int $last_modified A unix timestamp.
         * @throws \http\Exception\InvalidArgumentException
         * @return \http\Env\Response self.
         */
        function setLastModified(int $last_modified) {}
        /**
         * Enable throttling.
         * Send $chunk_size bytes every $delay seconds.
         * 
         * > ***NOTE:***
         * > If you need throttling by regular means, check for other options in your stack, because this method blocks the executing process/thread until the response has completely been sent.
         * 
         * @param int $chunk_size Bytes to send.
         * @param float $delay Seconds to sleep.
         * @return \http\Env\Response self.
         */
        function setThrottleRate(int $chunk_size, float $delay = 1) {}
}
/**
 * URL class using the HTTP environment by default.
 * 
 * > ***NOTE:***
 * > This class has been added in v3.0.0.
 * 
 * Always adds http\Url::FROM_ENV to the $flags constructor argument. See also http\Url.
 */
class Url extends \http\Url {
}
namespace http\Exception;
/**
 * A bad conversion (e.g. character conversion) was encountered.
 */
class BadConversionException extends \DomainException implements \http\Exception {
}
/**
 * A bad HTTP header was encountered.
 */
class BadHeaderException extends \DomainException implements \http\Exception {
}
/**
 * A bad HTTP message was encountered.
 */
class BadMessageException extends \DomainException implements \http\Exception {
}
/**
 * A method was called on an object, which was in an invalid or unexpected state.
 */
class BadMethodCallException extends \BadMethodCallException implements \http\Exception {
}
/**
 * A bad querystring was encountered.
 */
class BadQueryStringException extends \DomainException implements \http\Exception {
}
/**
 * A bad HTTP URL was encountered.
 */
class BadUrlException extends \DomainException implements \http\Exception {
}
/**
 * One or more invalid arguments were passed to a method.
 */
class InvalidArgumentException extends \InvalidArgumentException implements \http\Exception {
}
/**
 * A generic runtime exception.
 */
class RuntimeException extends \RuntimeException implements \http\Exception {
}
/**
 * An unexpected value was encountered.
 */
class UnexpectedValueException extends \UnexpectedValueException implements \http\Exception {
}
namespace http\Header;
/**
 * The parser which is underlying http\Header and http\Message.
 * 
 * > ***NOTE:***
 * > This class has been added in v2.3.0.
 */
class Parser  {
        /**
         * Finish up parser at end of (incomplete) input.
         */
        const CLEANUP = 1;
        /**
         * Parse failure.
         */
        const STATE_FAILURE = -1;
        /**
         * Expecting HTTP info (request/response line) or headers.
         */
        const STATE_START = 0;
        /**
         * Expecting a key or already parsing a key.
         */
        const STATE_KEY = 1;
        /**
         * Expecting a value or already parsing the value.
         */
        const STATE_VALUE = 2;
        /**
         * At EOL of an header, checking whether a folded header line follows.
         */
        const STATE_VALUE_EX = 3;
        /**
         * A header was completed.
         */
        const STATE_HEADER_DONE = 4;
        /**
         * Finished parsing the headers.
         * 
         * > ***NOTE:***
         * > Most of this states won't be returned to the user, because the parser immediately jumps to the next expected state.
         */
        const STATE_DONE = 5;
        /**
         * Retrieve the current state of the parser.
         * See http\Header\Parser::STATE_* constants.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return int http\Header\Parser::STATE_* constant.
         */
        function getState() {}
        /**
         * Parse a string.
         * 
         * @param string $data The (part of the) header to parse.
         * @param int $flags Any combination of [parser flags](http/Header/Parser#Parser.flags:).
         * @param array $header Successfully parsed headers.
         * @throws \http\Exception\InvalidArgumentException
         * @return int http\Header\Parser::STATE_* constant.
         */
        function parse(string $data, int $flags, array &$header = NULL) {}
        /**
         * Parse a stream.
         * 
         * @param resource $stream The header stream to parse from.
         * @param int $flags Any combination of [parser flags](http/Header/Parser#Parser.flags:).
         * @param array $headers The headers parsed.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return int http\Header\Parser::STATE_* constant.
         */
        function stream($stream, int $flags, array &$headers) {}
}
namespace http\Message;
/**
 * The message body, represented as a PHP (temporary) stream.
 * 
 * > ***NOTE:***
 * > Currently, http\Message\Body::addForm() creates multipart/form-data bodies.
 */
class Body implements \Serializable {
        /**
         * Create a new message body, optionally referencing $stream.
         * 
         * @param resource $stream A stream to be used as message body.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         */
        function __construct($stream = NULL) {}
        /**
         * String cast handler.
         * 
         * @return string the message body.
         */
        function __toString() {}
        /**
         * Add form fields and files to the message body.
         * 
         * > ***NOTE:***
         * > Currently, http\Message\Body::addForm() creates "multipart/form-data" bodies.
         * 
         * @param array $fields List of form fields to add.
         * @param array $files List of form files to add.
         * 
         * $fields must look like:
         * 
         *     [
         *       "field_name" => "value",
         *       "multi_field" => [
         *         "value1",
         *         "value2"
         *       ]
         *     ]
         * 
         * $files must look like:
         * 
         *     [
         *       [
         *         "name" => "field_name",
         *         "type" => "content/type",
         *         "file" => "/path/to/file.ext"
         *       ], [
         *         "name" => "field_name2",
         *         "type" => "text/plain",
         *         "file" => "file.ext",
         *         "data" => "string"
         *       ], [
         *         "name" => "field_name3",
         *         "type" => "image/jpeg",
         *         "file" => "file.ext",
         *         "data" => fopen("/home/mike/Pictures/mike.jpg","r")
         *     ]
         * 
         * As you can see, a file structure must contain a "file" entry, which holds a file path, and an optional "data" entry, which may either contain a resource to read from or the actual data as string.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         * @return \http\Message\Body self.
         */
        function addForm(array $fields = NULL, array $files = NULL) {}
        /**
         * Add a part to a multipart body.
         * 
         * @param \http\Message $part The message part.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         * @return \http\Message\Body self.
         */
        function addPart(\http\Message $part) {}
        /**
         * Append plain bytes to the message body.
         * 
         * @param string $data The data to append to the body.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\RuntimeException
         * @return \http\Message\Body self.
         */
        function append(string $data) {}
        /**
         * Retrieve the ETag of the body.
         * 
         * @return string|string|false string an Apache style ETag of inode, mtime and size in hex concatenated by hyphens if the message body stream is stat-able.
         *               or string a content hash (which algorithm is determined by INI http.etag.mode) if the stream is not stat-able.
         *               or false if http.etag.mode is not a known hash algorithm.
         */
        function etag() {}
        /**
         * Retrieve any boundary of the message body.
         * See http\Message::splitMultipartBody().
         * 
         * @return string|NULL string the message body boundary.
         *               or NULL if this message body has no boundary.
         */
        function getBoundary() {}
        /**
         * Retrieve the underlying stream resource.
         * 
         * @return resource the underlying stream.
         */
        function getResource() {}
        /**
         * Implements Serializable.
         * Alias of http\Message\Body::__toString().
         * 
         * @return string serialized message body.
         */
        function serialize() {}
        /**
         * Stat size, atime, mtime and/or ctime.
         * 
         * @param string $field A single stat field to retrieve.
         * @return int|object int the requested stat field.
         *               or object stdClass instance holding all four stat fields.
         */
        function stat(string $field = NULL) {}
        /**
         * Stream the message body through a callback.
         * 
         * @param callable $callback The callback of the form function(http\Message\Body $from, string $data).
         * @param int $offset Start to stream from this offset.
         * @param int $maxlen Stream at most $maxlen bytes, or all if $maxlen is less than 1.
         * @return \http\Message\Body self.
         */
        function toCallback(callable $callback, int $offset = 0, int $maxlen = 0) {}
        /**
         * Stream the message body into another stream $stream, starting from $offset, streaming $maxlen at most.
         * 
         * @param resource $stream The resource to write to.
         * @param int $offset The starting offset.
         * @param int $maxlen The maximum amount of data to stream. All content if less than 1.
         * @return \http\Message\Body self.
         */
        function toStream($stream, int $offset = 0, int $maxlen = 0) {}
        /**
         * Retrieve the message body serialized to a string.
         * Alias of http\Message\Body::__toString().
         * 
         * @return string message body.
         */
        function toString() {}
        /**
         * Implements Serializable.
         * 
         * @param string $serialized The serialized message body.
         */
        function unserialize($serialized) {}
}
/**
 * The parser which is underlying http\Message.
 * 
 * > ***NOTE:***
 * > This class was added in v2.2.0.
 */
class Parser  {
        /**
         * Finish up parser at end of (incomplete) input.
         */
        const CLEANUP = 1;
        /**
         * Soak up the rest of input if no entity length is deducible.
         */
        const DUMB_BODIES = 2;
        /**
         * Redirect messages do not contain any body despite of indication of such.
         */
        const EMPTY_REDIRECTS = 4;
        /**
         * Continue parsing while input is available.
         */
        const GREEDY = 8;
        /**
         * Parse failure.
         */
        const STATE_FAILURE = -1;
        /**
         * Expecting HTTP info (request/response line) or headers.
         */
        const STATE_START = 0;
        /**
         * Parsing headers.
         */
        const STATE_HEADER = 1;
        /**
         * Completed parsing headers.
         */
        const STATE_HEADER_DONE = 2;
        /**
         * Parsing the body.
         */
        const STATE_BODY = 3;
        /**
         * Soaking up all input as body.
         */
        const STATE_BODY_DUMB = 4;
        /**
         * Reading body as indicated by `Content-Length` or `Content-Range`.
         */
        const STATE_BODY_LENGTH = 5;
        /**
         * Parsing `chunked` encoded body.
         */
        const STATE_BODY_CHUNKED = 6;
        /**
         * Finished parsing the body.
         */
        const STATE_BODY_DONE = 7;
        /**
         * Updating Content-Length based on body size.
         */
        const STATE_UPDATE_CL = 8;
        /**
         * Finished parsing the message.
         * 
         * > ***NOTE:***
         * > Most of this states won't be returned to the user, because the parser immediately jumps to the next expected state.
         */
        const STATE_DONE = 9;
        /**
         * Retrieve the current state of the parser.
         * See http\Message\Parser::STATE_* constants.
         * 
         * @throws \http\Exception\InvalidArgumentException
         * @return int http\Message\Parser::STATE_* constant.
         */
        function getState() {}
        /**
         * Parse a string.
         * 
         * @param string $data The (part of the) message to parse.
         * @param int $flags Any combination of [parser flags](http/Message/Parser#Parser.flags:).
         * @param \http\Message $message The current state of the message parsed.
         * @throws \http\Exception\InvalidArgumentException
         * @return int http\Message\Parser::STATE_* constant.
         */
        function parse(string $data, int $flags, \http\Message &$message) {}
        /**
         * Parse a stream.
         * 
         * @param resource $stream The message stream to parse from.
         * @param int $flags Any combination of [parser flags](http/Message/Parser#Parser.flags:).
         * @param \http\Message $message The current state of the message parsed.
         * @throws \http\Exception\InvalidArgumentException
         * @throws \http\Exception\UnexpectedValueException
         * @return int http\Message\Parser::STATE_* constant.
         */
        function stream($stream, int $flags, \http\Message &$message) {}
}