/mvc/components/httpSocket
[return to app]1
<?php
/**
* HTTP Socket connection class.
*
* PHP versions 5
*
* This is CakePHP's http_socket and cake_socket classes updated to PHP5 syntax
* and merged for Vork
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs
* @since CakePHP(tm) v 1.2.0
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* Cake network socket connection class.
*
* Core base class for HTTP network communication. HttpSocket can be used as an
* Object Oriented replacement for cURL in many places.
*
* @package cake
* @subpackage cake.cake.libs
*/
class httpSocketComponent {
/**
* Object description
*
* @var string
* @access public
*/
public $description = 'HTTP-based DataSource Interface';
/**
* When one activates the $quirksMode by setting it to true, all checks meant to
* enforce RFC 2616 (HTTP/1.1 specs).
* will be disabled and additional measures to deal with non-standard responses will be enabled.
*
* @var boolean
* @access public
*/
public $quirksMode = false;
/**
* The default values to use for a request
*
* @var array
* @access public
*/
public $request = array(
'method' => 'GET',
'uri' => array(
'scheme' => 'http',
'host' => null,
'port' => 80,
'user' => null,
'pass' => null,
'path' => null,
'query' => null,
'fragment' => null
),
'auth' => array(
'method' => 'Basic',
'user' => null,
'pass' => null
),
'version' => '1.1',
'body' => '',
'line' => null,
'header' => array(
'Connection'=> 'close',
'User-Agent'=> 'VorkPHP'
),
'raw' => null,
'cookies' => array()
);
/**
* The default structure for storing the response
*
* @var array
* @access public
*/
public $response = array(
'raw' => array(
'status-line' => null,
'header' => null,
'body' => null,
'response' => null
),
'status' => array(
'http-version' => null,
'code' => null,
'reason-phrase' => null
),
'header' => array(),
'body' => '',
'cookies' => array()
);
/**
* Default configuration settings for the HttpSocket
*
* @var array
* @access public
*/
public $config = array(
'persistent' => false,
'host' => 'localhost',
'protocol' => 'tcp',
'port' => 80,
'timeout' => 30,
'request' => array(
'uri' => array(
'scheme' => 'http',
'host' => 'localhost',
'port' => 80
),
'auth' => array(
'method' => 'Basic',
'user' => null,
'pass' => null
),
'cookies' => array()
)
);
/**
* String that represents a line break.
*
* @var string
* @access public
*/
public $lineBreak = "\r\n";
/**
* Reference to socket connection resource
*
* @var resource
* @access public
*/
public $connection = null;
/**
* This boolean contains the current state of the CakeSocket class
*
* @var boolean
* @access public
*/
public $connected = false;
/**
* This variable contains an array with the last error number (num) and string (str)
*
* @var array
* @access public
*/
public $lastError = array();
/**
* Build an HTTP Socket using the specified configuration.
*
* You can use a url string to set the url and use default configurations for
* all other options:
*
* `$http =& new HttpSockect('http://cakephp.org/');`
*
* Or use an array to configure multiple options:
*
* {{{
* $http =& new HttpSocket(array(
* 'host' => 'cakephp.org',
* 'timeout' => 20
* ));
* }}}
*
* See HttpSocket::$config for options that can be used.
*
* @param mixed $config Configuration information, either a string url or an array of options.
* @access public
*/
public function __construct($config = array()) {
if (is_string($config)) {
$this->_configUri($config);
} elseif (is_array($config)) {
if (isset($config['request']['uri']) && is_string($config['request']['uri'])) {
$this->_configUri($config['request']['uri']);
unset($config['request']['uri']);
}
$this->config = get::component('set')->merge($this->config, $config);
}
if (!is_numeric($this->config['protocol'])) {
$this->config['protocol'] = getprotobyname($this->config['protocol']);
}
}
/**
* Destructor, used to disconnect from current connection.
*
* @access private
*/
public function __destruct() {
$this->disconnect();
}
/**
* Issue the specified request. HttpSocket::get() and HttpSocket::post() wrap this
* method and provide a more granular interface.
*
* @param mixed $request Either an URI string, or an array defining host/uri
* @return mixed false on error, request body on success
* @access public
*/
public function request($request = array()) {
$this->reset(false);
if (is_string($request)) {
$request = array('uri' => $request);
} elseif (!is_array($request)) {
return false;
}
if (!isset($request['uri'])) {
$request['uri'] = null;
}
$uri = $this->_parseUri($request['uri']);
$hadAuth = false;
if (is_array($uri) && array_key_exists('user', $uri)) {
$hadAuth = true;
}
if (!isset($uri['host'])) {
$host = $this->config['host'];
}
if (isset($request['host'])) {
$host = $request['host'];
unset($request['host']);
}
$request['uri'] = $this->url($request['uri']);
$request['uri'] = $this->_parseUri($request['uri'], true);
$this->request = get::component('set')->merge($this->request, $this->config['request'], $request);
if (!$hadAuth && !empty($this->config['request']['auth']['user'])) {
$this->request['uri']['user'] = $this->config['request']['auth']['user'];
$this->request['uri']['pass'] = $this->config['request']['auth']['pass'];
}
$this->_configUri($this->request['uri']);
if (isset($host)) {
$this->config['host'] = $host;
}
$cookies = null;
if (is_array($this->request['header'])) {
$this->request['header'] = $this->_parseHeader($this->request['header']);
if (!empty($this->request['cookies'])) {
$cookies = $this->buildCookies($this->request['cookies']);
}
$Host = $this->request['uri']['host'];
$schema = '';
$port = 0;
if (isset($this->request['uri']['schema'])) {
$schema = $this->request['uri']['schema'];
}
if (isset($this->request['uri']['port'])) {
$port = $this->request['uri']['port'];
}
if (
($schema === 'http' && $port != 80) ||
($schema === 'https' && $port != 443) ||
($port != 80 && $port != 443)
) {
$Host .= ':' . $port;
}
$this->request['header'] = array_merge(compact('Host'), $this->request['header']);
}
if (isset($this->request['auth']['user']) && isset($this->request['auth']['pass'])) {
$this->request['header']['Authorization'] = $this->request['auth']['method']
. " " . base64_encode($this->request['auth']['user']
. ":" . $this->request['auth']['pass']);
}
if (isset($this->request['uri']['user']) && isset($this->request['uri']['pass'])) {
$this->request['header']['Authorization'] = $this->request['auth']['method']
. " " . base64_encode($this->request['uri']['user']
. ":" . $this->request['uri']['pass']);
}
if (is_array($this->request['body'])) {
$this->request['body'] = $this->_httpSerialize($this->request['body']);
}
if (!empty($this->request['body']) && !isset($this->request['header']['Content-Type'])) {
$this->request['header']['Content-Type'] = 'application/x-www-form-urlencoded';
}
if (!empty($this->request['body']) && !isset($this->request['header']['Content-Length'])) {
$this->request['header']['Content-Length'] = strlen($this->request['body']);
}
$connectionType = null;
if (isset($this->request['header']['Connection'])) {
$connectionType = $this->request['header']['Connection'];
}
$this->request['header'] = $this->_buildHeader($this->request['header']) . $cookies;
if (empty($this->request['line'])) {
$this->request['line'] = $this->_buildRequestLine($this->request);
}
if ($this->quirksMode === false && $this->request['line'] === false) {
return $this->response = false;
}
if ($this->request['line'] !== false) {
$this->request['raw'] = $this->request['line'];
}
if ($this->request['header'] !== false) {
$this->request['raw'] .= $this->request['header'];
}
$this->request['raw'] .= "\r\n";
$this->request['raw'] .= $this->request['body'];
$this->write($this->request['raw']);
$response = null;
while ($data = $this->read()) {
$response .= $data;
}
if ($connectionType == 'close') {
$this->disconnect();
}
$this->response = $this->_parseResponse($response);
if (!empty($this->response['cookies'])) {
$this->config['request']['cookies'] = array_merge($this->config['request']['cookies'],
$this->response['cookies']);
}
return $this->response['body'];
}
/**
* Issues a GET request to the specified URI, query, and request.
*
* Using a string uri and an array of query string parameters:
*
* `$response = $http->get('http://google.com/search', array('q' => 'cakephp', 'client' => 'safari'));`
*
* Would do a GET request to `http://google.com/search?q=cakephp&client=safari`
*
* You could express the same thing using a uri array and query string parameters:
*
* {{{
* $response = $http->get(
* array('host' => 'google.com', 'path' => '/search'),
* array('q' => 'cakephp', 'client' => 'safari')
* );
* }}}
*
* @param mixed $uri URI to request. Either a string uri, or a uri array, see HttpSocket::_parseUri()
* @param array $query Querystring parameters to append to URI
* @param array $request An indexed array with indexes such as 'method' or uri
* @return mixed Result of request, either false on failure or the response to the request.
* @access public
*/
public function get($uri = null, $query = array(), $request = array()) {
if (!empty($query)) {
$uri = $this->_parseUri($uri);
if (isset($uri['query'])) {
$uri['query'] = array_merge($uri['query'], $query);
} else {
$uri['query'] = $query;
}
$uri = $this->_buildUri($uri);
}
$request = get::component('set')->merge(array('method' => 'GET', 'uri' => $uri), $request);
return $this->request($request);
}
/**
* Issues a POST request to the specified URI, query, and request.
*
* `post()` can be used to post simple data arrays to a url:
*
* {{{
* $response = $http->post('http://example.com', array(
* 'username' => 'batman',
* 'password' => 'bruce_w4yne'
* ));
* }}}
*
* @param mixed $uri URI to request. See HttpSocket::_parseUri()
* @param array $data Array of POST data keys and values.
* @param array $request An indexed array with indexes such as 'method' or uri
* @return mixed Result of request, either false on failure or the response to the request.
* @access public
*/
public function post($uri = null, $data = array(), $request = array()) {
$request = get::component('set')->merge(array('method' => 'POST', 'uri' => $uri, 'body' => $data),
$request);
return $this->request($request);
}
/**
* Issues a PUT request to the specified URI, query, and request.
*
* @param mixed $uri URI to request, See HttpSocket::_parseUri()
* @param array $data Array of PUT data keys and values.
* @param array $request An indexed array with indexes such as 'method' or uri
* @return mixed Result of request
* @access public
*/
public function put($uri = null, $data = array(), $request = array()) {
$request = get::component('set')->merge(array('method' => 'PUT', 'uri' => $uri, 'body' => $data),
$request);
return $this->request($request);
}
/**
* Issues a DELETE request to the specified URI, query, and request.
*
* @param mixed $uri URI to request (see {@link _parseUri()})
* @param array $data Query to append to URI
* @param array $request An indexed array with indexes such as 'method' or uri
* @return mixed Result of request
* @access public
*/
public function delete($uri = null, $data = array(), $request = array()) {
$request = get::component('set')->merge(array('method' => 'DELETE', 'uri' => $uri, 'body' => $data),
$request);
return $this->request($request);
}
/**
* Connect the socket to the given host and port.
*
* @return boolean Success
* @access public
*/
public function connect() {
if (isset($this->connection) && $this->connection != null) {
$this->disconnect();
}
$scheme = null;
if (isset($this->config['request']) && $this->config['request']['uri']['scheme'] == 'https') {
$scheme = 'ssl://';
}
if ($this->config['persistent'] == true) {
$tmp = null;
$this->connection = @pfsockopen($scheme.$this->config['host'], $this->config['port'],
$errNum, $errStr, $this->config['timeout']);
} else {
$this->connection = @fsockopen($scheme.$this->config['host'], $this->config['port'],
$errNum, $errStr, $this->config['timeout']);
}
if (!empty($errNum) || !empty($errStr)) {
$this->setLastError($errStr, $errNum);
}
$this->connected = is_resource($this->connection);
if ($this->connected) {
stream_set_timeout($this->connection, $this->config['timeout']);
}
return $this->connected;
}
/**
* Get the host name of the current connection.
*
* @return string Host name
* @access public
*/
public function host() {
if (get::component('validation')->ip($this->config['host'])) {
return gethostbyaddr($this->config['host']);
} else {
return gethostbyaddr($this->address());
}
}
/**
* Get the IP address of the current connection.
*
* @return string IP address
* @access public
*/
public function address() {
if (get::component('validation')->ip($this->config['host'])) {
return $this->config['host'];
} else {
return gethostbyname($this->config['host']);
}
}
/**
* Get all IP addresses associated with the current connection.
*
* @return array IP addresses
* @access public
*/
public function addresses() {
if (get::component('validation')->ip($this->config['host'])) {
return array($this->config['host']);
} else {
return gethostbynamel($this->config['host']);
}
}
/**
* Get the last error as a string.
*
* @return string Last error
* @access public
*/
public function lastError() {
if (!empty($this->lastError)) {
return $this->lastError['num'] . ': ' . $this->lastError['str'];
} else {
return null;
}
}
/**
* Set the last error.
*
* @param integer $errNum Error code
* @param string $errStr Error string
* @access public
*/
public function setLastError($errNum, $errStr) {
$this->lastError = array('num' => $errNum, 'str' => $errStr);
}
/**
* Write data to the socket.
*
* @param string $data The data to write to the socket
* @return boolean Success
* @access public
*/
public function write($data) {
if (!$this->connected) {
if (!$this->connect()) {
return false;
}
}
return fwrite($this->connection, $data, strlen($data));
}
/**
* Read data from the socket. Returns false if no data is available or no connection could be
* established.
*
* @param integer $length Optional buffer length to read; defaults to 1024
* @return mixed Socket data
* @access public
*/
public function read($length = 1024) {
if (!$this->connected) {
if (!$this->connect()) {
return false;
}
}
if (!feof($this->connection)) {
$buffer = fread($this->connection, $length);
$info = stream_get_meta_data($this->connection);
if ($info['timed_out']) {
$this->setLastError(E_WARNING, 'Connection timed out');
return false;
}
return $buffer;
} else {
return false;
}
}
/**
* Abort socket operation.
*
* @return boolean Success
* @access public
*/
public function abort() {
}
/**
* Disconnect the socket from the current connection.
*
* @return boolean Success
* @access public
*/
public function disconnect() {
if (!is_resource($this->connection)) {
$this->connected = false;
return true;
}
$this->connected = !fclose($this->connection);
if (!$this->connected) {
$this->connection = null;
}
return !$this->connected;
}
/**
* Normalizes urls into a $uriTemplate. If no template is provided
* a default one will be used. Will generate the url using the
* current config information.
*
* ### Usage:
*
* After configuring part of the request parameters, you can use url() to generate
* urls.
*
* {{{
* $http->configUri('http://www.cakephp.org');
* $url = $http->url('/search?q=bar');
* }}}
*
* Would return `http://www.cakephp.org/search?q=bar`
*
* url() can also be used with custom templates:
*
* `$url = $http->url('http://www.cakephp/search?q=socket', '/%path?%query');`
*
* Would return `/search?q=socket`.
*
* @param mixed $url Either a string or array of url options to create a url with.
* @param string $uriTemplate A template string to use for url formatting.
* @return mixed Either false on failure or a string containing the composed url.
* @access public
*/
public function url($url = null, $uriTemplate = null) {
if (is_null($url)) {
$url = '/';
}
if (is_string($url)) {
if ($url{0} == '/') {
$url = $this->config['request']['uri']['host'].':'.$this->config['request']['uri']['port'] . $url;
}
if (!preg_match('/^.+:\/\/|\*|^\//', $url)) {
$url = $this->config['request']['uri']['scheme'].'://'.$url;
}
} elseif (!is_array($url) && !empty($url)) {
return false;
}
$base = array_merge($this->config['request']['uri'],
array('scheme' => array('http', 'https'), 'port' => array(80, 443)));
$url = $this->_parseUri($url, $base);
if (empty($url)) {
$url = $this->config['request']['uri'];
}
if (!empty($uriTemplate)) {
return $this->_buildUri($url, $uriTemplate);
}
return $this->_buildUri($url);
}
/**
* Parses the given message and breaks it down in parts.
*
* @param string $message Message to parse
* @return array Parsed message (with indexed elements such as raw, status, header, body)
* @access protected
*/
protected function _parseResponse($message) {
if (is_array($message)) {
return $message;
} elseif (!is_string($message)) {
return false;
}
static $responseTemplate;
if (empty($responseTemplate)) {
$classVars = get_class_vars(__CLASS__);
$responseTemplate = $classVars['response'];
}
$response = $responseTemplate;
if (!preg_match("/^(.+\r\n)(.*)(?<=\r\n)\r\n/Us", $message, $match)) {
return false;
}
list($null, $response['raw']['status-line'], $response['raw']['header']) = $match;
$response['raw']['response'] = $message;
$response['raw']['body'] = substr($message, strlen($match[0]));
if (preg_match("/(.+) ([0-9]{3}) (.+)\r\n/DU", $response['raw']['status-line'], $match)) {
$response['status']['http-version'] = $match[1];
$response['status']['code'] = (int)$match[2];
$response['status']['reason-phrase'] = $match[3];
}
$response['header'] = $this->_parseHeader($response['raw']['header']);
$transferEncoding = null;
if (isset($response['header']['Transfer-Encoding'])) {
$transferEncoding = $response['header']['Transfer-Encoding'];
}
$decoded = $this->_decodeBody($response['raw']['body'], $transferEncoding);
$response['body'] = $decoded['body'];
if (!empty($decoded['header'])) {
$response['header'] = $this->_parseHeader($this->_buildHeader($response['header']) .
$this->_buildHeader($decoded['header']));
}
if (!empty($response['header'])) {
$response['cookies'] = $this->parseCookies($response['header']);
}
foreach ($response['raw'] as $field => $val) {
if ($val === '') {
$response['raw'][$field] = null;
}
}
return $response;
}
/**
* Generic function to decode a $body with a given $encoding. Returns either an array with the keys
* 'body' and 'header' or false on failure.
*
* @param string $body A string continaing the body to decode.
* @param mixed $encoding Can be false in case no encoding is being used, or a string representing the
encoding.
* @return mixed Array of response headers and body or false.
* @access protected
*/
protected function _decodeBody($body, $encoding = 'chunked') {
if (!is_string($body)) {
return false;
}
if (empty($encoding)) {
return array('body' => $body, 'header' => false);
}
$decodeMethod = '_decode' . ucfirst($encoding) . 'Body';
if (!is_callable(array(&$this, $decodeMethod))) {
if (!$this->quirksMode) {
trigger_error(sprintf('httpSocketComponent::_decodeBody - Unknown encoding: %s. ' .
'Activate quirks mode to surpress error.', h($encoding)),
E_USER_WARNING);
}
return array('body' => $body, 'header' => false);
}
return $this->{$decodeMethod}($body);
}
/**
* Decodes a chunked message $body and returns either an array with the keys 'body' and 'header' or false as
* a result.
*
* @param string $body A string continaing the chunked body to decode.
* @return mixed Array of response headers and body or false.
* @access protected
*/
protected function _decodeChunkedBody($body) {
if (!is_string($body)) {
return false;
}
$decodedBody = null;
$chunkLength = null;
while ($chunkLength !== 0) {
if (!preg_match("/^([0-9a-f]+) *(?:;(.+)=(.+))?\r\n/iU", $body, $match)) {
if (!$this->quirksMode) {
trigger_error('httpSocketComponent::_decodeChunkedBody - Could not parse malformed chunk. ' .
'Activate quirks mode to do this.', E_USER_WARNING);
return false;
}
break;
}
$chunkSize = 0;
$hexLength = 0;
$chunkExtensionName = '';
$chunkExtensionValue = '';
if (isset($match[0])) {
$chunkSize = $match[0];
}
if (isset($match[1])) {
$hexLength = $match[1];
}
if (isset($match[2])) {
$chunkExtensionName = $match[2];
}
if (isset($match[3])) {
$chunkExtensionValue = $match[3];
}
$body = substr($body, strlen($chunkSize));
$chunkLength = hexdec($hexLength);
$chunk = substr($body, 0, $chunkLength);
if (!empty($chunkExtensionName)) {
/**
* @todo See if there are popular chunk extensions we should implement
*/
}
$decodedBody .= $chunk;
if ($chunkLength !== 0) {
$body = substr($body, $chunkLength+strlen("\r\n"));
}
}
$entityHeader = false;
if (!empty($body)) {
$entityHeader = $this->_parseHeader($body);
}
return array('body' => $decodedBody, 'header' => $entityHeader);
}
/**
* Parses and sets the specified URI into current request configuration.
*
* @param mixed $uri URI, See HttpSocket::_parseUri()
* @return array Current configuration settings
* @access protected
*/
protected function _configUri($uri = null) {
if (empty($uri)) {
return false;
}
if (is_array($uri)) {
$uri = $this->_parseUri($uri);
} else {
$uri = $this->_parseUri($uri, true);
}
if (!isset($uri['host'])) {
return false;
}
$config = array(
'request' => array(
'uri' => array_intersect_key($uri, $this->config['request']['uri']),
'auth' => array_intersect_key($uri, $this->config['request']['auth'])
)
);
$this->config = get::component('set')->merge($this->config, $config);
$this->config = get::component('set')->merge(
$this->config,
array_intersect_key($this->config['request']['uri'], $this->config)
);
return $this->config;
}
/**
* Takes a $uri array and turns it into a fully qualified URL string
*
* @param mixed $uri Either A $uri array, or a request string. Will use $this->config if left empty.
* @param string $uriTemplate The Uri template/format to use.
* @return mixed A fully qualified URL formated according to $uriTemplate, or false on failure
* @access protected
*/
protected function _buildUri($uri = array(),
$uriTemplate = '%scheme://%user:%pass@%host:%port/%path?%query#%fragment') {
if (is_string($uri)) {
$uri = array('host' => $uri);
}
$uri = $this->_parseUri($uri, true);
if (!is_array($uri) || empty($uri)) {
return false;
}
$uri['path'] = preg_replace('/^\//', null, $uri['path']);
$uri['query'] = $this->_httpSerialize($uri['query']);
$stripIfEmpty = array(
'query' => '?%query',
'fragment' => '#%fragment',
'user' => '%user:%pass@',
'host' => '%host:%port/'
);
foreach ($stripIfEmpty as $key => $strip) {
if (empty($uri[$key])) {
$uriTemplate = str_replace($strip, null, $uriTemplate);
}
}
$defaultPorts = array('http' => 80, 'https' => 443);
if (array_key_exists($uri['scheme'], $defaultPorts) && $defaultPorts[$uri['scheme']] == $uri['port']) {
$uriTemplate = str_replace(':%port', null, $uriTemplate);
}
foreach ($uri as $property => $value) {
$uriTemplate = str_replace('%'.$property, $value, $uriTemplate);
}
if ($uriTemplate === '/*') {
$uriTemplate = '*';
}
return $uriTemplate;
}
/**
* Parses the given URI and breaks it down into pieces as an indexed array with elements
* such as 'scheme', 'port', 'query'.
*
* @param string $uri URI to parse
* @param mixed $base If true use default URI config, otherwise indexed array to set 'scheme', 'host', 'port',
etc.
* @return array Parsed URI
* @access protected
*/
protected function _parseUri($uri = null, $base = array()) {
$uriBase = array(
'scheme' => array('http', 'https'),
'host' => null,
'port' => array(80, 443),
'user' => null,
'pass' => null,
'path' => '/',
'query' => null,
'fragment' => null
);
if (is_string($uri)) {
$uri = parse_url($uri);
}
if (!is_array($uri) || empty($uri)) {
return false;
}
if ($base === true) {
$base = $uriBase;
}
if (isset($base['port'], $base['scheme']) && is_array($base['port']) && is_array($base['scheme'])) {
if (isset($uri['scheme']) && !isset($uri['port'])) {
$base['port'] = $base['port'][array_search($uri['scheme'], $base['scheme'])];
} elseif (isset($uri['port']) && !isset($uri['scheme'])) {
$base['scheme'] = $base['scheme'][array_search($uri['port'], $base['port'])];
}
}
if (is_array($base) && !empty($base)) {
$uri = array_merge($base, $uri);
}
if (isset($uri['scheme']) && is_array($uri['scheme'])) {
$uri['scheme'] = array_shift($uri['scheme']);
}
if (isset($uri['port']) && is_array($uri['port'])) {
$uri['port'] = array_shift($uri['port']);
}
if (array_key_exists('query', $uri)) {
$uri['query'] = $this->_parseQuery($uri['query']);
}
if (!array_intersect_key($uriBase, $uri)) {
return false;
}
return $uri;
}
/**
* This function can be thought of as a reverse to PHP5's http_build_query(). It takes a given
* query string and turns it into an array and supports nesting by using the php bracket syntax.
* So this menas you can parse queries like:
*
* - ?key[subKey]=value
* - ?key[]=value1&key[]=value2
*
* A leading '?' mark in $query is optional and does not effect the outcome of this function.
* For the complete capabilities of this implementation take a look at HttpSocketTest::testparseQuery()
*
* @param mixed $query A query string to parse into an array or an array to return directly "as is"
* @return array The $query parsed into a possibly multi-level array. If an empty $query is
* given, an empty array is returned.
* @access protected
*/
protected function _parseQuery($query) {
if (is_array($query)) {
return $query;
}
$parsedQuery = array();
if (is_string($query) && !empty($query)) {
$query = preg_replace('/^\?/', '', $query);
$items = explode('&', $query);
foreach ($items as $item) {
if (strpos($item, '=') !== false) {
list($key, $value) = explode('=', $item, 2);
} else {
$key = $item;
$value = null;
}
$key = urldecode($key);
$value = urldecode($value);
if (preg_match_all('/\[([^\[\]]*)\]/iUs', $key, $matches)) {
$subKeys = $matches[1];
$rootKey = substr($key, 0, strpos($key, '['));
if (!empty($rootKey)) {
array_unshift($subKeys, $rootKey);
}
$queryNode =& $parsedQuery;
foreach ($subKeys as $subKey) {
if (!is_array($queryNode)) {
$queryNode = array();
}
if ($subKey === '') {
$queryNode[] = array();
end($queryNode);
$subKey = key($queryNode);
}
$queryNode =& $queryNode[$subKey];
}
$queryNode = $value;
} else {
$parsedQuery[$key] = $value;
}
}
}
return $parsedQuery;
}
/**
* Builds a request line according to HTTP/1.1 specs. Activate quirks mode to work outside specs.
*
* @param array $request Needs to contain a 'uri' key. Should also contain a 'method' key,
* otherwise defaults to GET.
* @param string $versionToken The version token to use, defaults to HTTP/1.1
* @return string Request line
* @access protected
*/
protected function _buildRequestLine($request = array(), $versionToken = 'HTTP/1.1') {
$asteriskMethods = array('OPTIONS');
if (is_string($request)) {
$isValid = preg_match("/(.+) (.+) (.+)\r\n/U", $request, $match);
if (!$this->quirksMode && (!$isValid || ($match[2] == '*' && !in_array($match[3], $asteriskMethods))))
{
trigger_error('httpSocketComponent::_buildRequestLine - Passed an invalid request line string. ' .
'Activate quirks mode to do this.', E_USER_WARNING);
return false;
}
return $request;
} elseif (!is_array($request)) {
return false;
} elseif (!array_key_exists('uri', $request)) {
return false;
}
$request['uri'] = $this->_parseUri($request['uri']);
$request = array_merge(array('method' => 'GET'), $request);
$request['uri'] = $this->_buildUri($request['uri'], '/%path?%query');
if (!$this->quirksMode && $request['uri'] === '*' && !in_array($request['method'], $asteriskMethods)) {
trigger_error(sprintf('httpSocketComponent::_buildRequestLine - The "*" asterisk character is only ' .
'allowed for the following methods: %s. Activate quirks mode to work outside ' .
'of HTTP/1.1 specs.',
join(',', $asteriskMethods)),
E_USER_WARNING);
return false;
}
return $request['method'].' '.$request['uri'].' '.$versionToken.$this->lineBreak;
}
/**
* Serializes an array for transport.
*
* @param array $data Data to serialize
* @return string Serialized variable
* @access protected
*/
protected function _httpSerialize($data = array()) {
if (is_string($data)) {
return $data;
}
if (empty($data) || !is_array($data)) {
return false;
}
return substr(self::_routerQueryString($data), 1);
}
/**
* Generates a well-formed querystring from $q
*
* @param mixed $q Query string
* @param array $extra Extra querystring parameters.
* @param bool $escape Whether or not to use escaped &
* @return array
* @access public
* @static
*/
protected function _routerQueryString($q, $extra = array(), $escape = false) {
if (empty($q) && empty($extra)) {
return null;
}
$join = '&';
if ($escape === true) {
$join = '&';
}
$out = '';
if (is_array($q)) {
$q = array_merge($extra, $q);
} else {
$out = $q;
$q = $extra;
}
$out .= http_build_query($q, null, $join);
if (isset($out[0]) && $out[0] != '?') {
$out = '?' . $out;
}
return $out;
}
/**
* Builds the header.
*
* @param array $header Header to build
* @return string Header built from array
* @access protected
*/
protected function _buildHeader($header, $mode = 'standard') {
if (is_string($header)) {
return $header;
} elseif (!is_array($header)) {
return false;
}
$returnHeader = '';
foreach ($header as $field => $contents) {
if (is_array($contents) && $mode == 'standard') {
$contents = implode(',', $contents);
}
foreach ((array)$contents as $content) {
$contents = preg_replace("/\r\n(?![\t ])/", "\r\n ", $content);
$field = $this->_escapeToken($field);
$returnHeader .= $field.': '.$contents.$this->lineBreak;
}
}
return $returnHeader;
}
/**
* Parses an array based header.
*
* @param array $header Header as an indexed array (field => value)
* @return array Parsed header
* @access protected
*/
protected function _parseHeader($header) {
if (is_array($header)) {
foreach ($header as $field => $value) {
unset($header[$field]);
$field = strtolower($field);
preg_match_all('/(?:^|(?<=-))[a-z]/U', $field, $offsets, PREG_OFFSET_CAPTURE);
foreach ($offsets[0] as $offset) {
$field = substr_replace($field, strtoupper($offset[0]), $offset[1], 1);
}
$header[$field] = $value;
}
return $header;
} elseif (!is_string($header)) {
return false;
}
preg_match_all("/(.+):(.+)(?:(?<![\t ])" . $this->lineBreak . "|\$)/Uis", $header, $matches,
PREG_SET_ORDER);
$header = array();
foreach ($matches as $match) {
list(, $field, $value) = $match;
$value = trim($value);
$value = preg_replace("/[\t ]\r\n/", "\r\n", $value);
$field = $this->_unescapeToken($field);
$field = strtolower($field);
preg_match_all('/(?:^|(?<=-))[a-z]/U', $field, $offsets, PREG_OFFSET_CAPTURE);
foreach ($offsets[0] as $offset) {
$field = substr_replace($field, strtoupper($offset[0]), $offset[1], 1);
}
if (!isset($header[$field])) {
$header[$field] = $value;
} else {
$header[$field] = array_merge((array)$header[$field], (array)$value);
}
}
return $header;
}
/**
* Parses cookies in response headers.
*
* @param array $header Header array containing one ore more 'Set-Cookie' headers.
* @return mixed Either false on no cookies, or an array of cookies recieved.
* @access public
* @todo Make this 100% RFC 2965 confirm
*/
protected function parseCookies($header) {
if (!isset($header['Set-Cookie'])) {
return false;
}
$cookies = array();
foreach ((array)$header['Set-Cookie'] as $cookie) {
if (strpos($cookie, '";"') !== false) {
$cookie = str_replace('";"', "{__cookie_replace__}", $cookie);
$parts = str_replace("{__cookie_replace__}", '";"', explode(';', $cookie));
} else {
$parts = preg_split('/\;[ \t]*/', $cookie);
}
list($name, $value) = explode('=', array_shift($parts), 2);
$cookies[$name] = compact('value');
foreach ($parts as $part) {
if (strpos($part, '=') !== false) {
list($key, $value) = explode('=', $part);
} else {
$key = $part;
$value = true;
}
$key = strtolower($key);
if (!isset($cookies[$name][$key])) {
$cookies[$name][$key] = $value;
}
}
}
return $cookies;
}
/**
* Builds cookie headers for a request.
*
* @param array $cookies Array of cookies to send with the request.
* @return string Cookie header string to be sent with the request.
* @access public
* @todo Refactor token escape mechanism to be configurable
*/
protected function buildCookies($cookies) {
$header = array();
foreach ($cookies as $name => $cookie) {
$header[] = $name.'='.$this->_escapeToken($cookie['value'], array(';'));
}
$header = $this->_buildHeader(array('Cookie' => implode('; ', $header)), 'pragmatic');
return $header;
}
/**
* Unescapes a given $token according to RFC 2616 (HTTP 1.1 specs)
*
* @param string $token Token to unescape
* @return string Unescaped token
* @access protected
* @todo Test $chars parameter
*/
protected function _unescapeToken($token, $chars = null) {
$regex = '/"(['.join('', $this->_tokenEscapeChars(true, $chars)).'])"/';
$token = preg_replace($regex, '\\1', $token);
return $token;
}
/**
* Escapes a given $token according to RFC 2616 (HTTP 1.1 specs)
*
* @param string $token Token to escape
* @return string Escaped token
* @access protected
* @todo Test $chars parameter
*/
protected function _escapeToken($token, $chars = null) {
$regex = '/(['.join('', $this->_tokenEscapeChars(true, $chars)).'])/';
$token = preg_replace($regex, '"\\1"', $token);
return $token;
}
/**
* Gets escape chars according to RFC 2616 (HTTP 1.1 specs).
*
* @param boolean $hex true to get them as HEX values, false otherwise
* @return array Escape chars
* @access protected
* @todo Test $chars parameter
*/
protected function _tokenEscapeChars($hex = true, $chars = null) {
if (!empty($chars)) {
$escape = $chars;
} else {
$escape = array('"', "(", ")", "<", ">", "@", ",", ";", ":", "\\", "/", "[", "]", "?", "=", "{", "}",
" ");
for ($i = 0; $i <= 31; $i++) {
$escape[] = chr($i);
}
$escape[] = chr(127);
}
if ($hex == false) {
return $escape;
}
$regexChars = '';
foreach ($escape as $key => $char) {
$escape[$key] = '\\x'.str_pad(dechex(ord($char)), 2, '0', STR_PAD_LEFT);
}
return $escape;
}
/**
* Resets the state of this HttpSocket instance to it's initial state (before Object::__construct got
* executed) or does the same thing partially for the request and the response property only.
*
* @param boolean $full If set to false only HttpSocket::response and HttpSocket::request are reseted
* @return boolean True on success
* @access public
*/
public function reset($full = true) {
static $initalState = array();
if (empty($initalState)) {
$initalState = get_class_vars(__CLASS__);
}
if ($full == false) {
$this->request = $initalState['request'];
$this->response = $initalState['response'];
return true;
}
foreach ($initialState as $property => $value) {
$this->{$property} = $value;
}
return true;
}
}