public static function throwException($status_code, $message, $results) {

switch ($status_code) {

case 0:

// Success

break;

case 1:

throw new PHPWebDriver_IndexOutOfBoundsWebDriverError($message, $results);

case 2:

throw new PHPWebDriver_NoCollectionWebDriverError($message, $results);

case 3:

throw new PHPWebDriver_NoStringWebDriverError($message, $results);

case 4:

throw new PHPWebDriver_NoStringLengthWebDriverError($message, $results);

case 5:

throw new PHPWebDriver_NoStringWrapperWebDriverError($message, $results);

case 6:

throw new PHPWebDriver_NoSuchDriverWebDriverError($message, $results);

case 7:

throw new PHPWebDriver_NoSuchElementWebDriverError($message, $results);

case 8:

throw new PHPWebDriver_NoSuchFrameWebDriverError($message, $results);

case 9:

throw new PHPWebDriver_UnknownCommandWebDriverError($message, $results);

case 10:

throw new PHPWebDriver_ObsoleteElementWebDriverError($message, $results);

case 11:

throw new PHPWebDriver_ElementNotDisplayedWebDriverError($message, $results);

case 12:

throw new PHPWebDriver_InvalidElementStateWebDriverError($message, $results);

case 13:

throw new PHPWebDriver_UnhandledWebDriverError($message, $results);

case 14:

throw new PHPWebDriver_ExpectedWebDriverError($message, $results);

case 15:

throw new PHPWebDriver_ElementNotSelectableWebDriverError($message, $results);

case 16:

throw new PHPWebDriver_NoSuchDocumentWebDriverError($message, $results);

case 17:

throw new PHPWebDriver_UnexpectedJavascriptWebDriverError($message, $results);

case 18:

throw new PHPWebDriver_NoScriptResultWebDriverError($message, $results);

case 19:

throw new PHPWebDriver_XPathLookupWebDriverError($message, $results);

case 20:

throw new PHPWebDriver_NoSuchCollectionWebDriverError($message, $results);

case 21:

throw new PHPWebDriver_TimeOutWebDriverError($message, $results);

case 22:

throw new PHPWebDriver_NullPointerWebDriverError($message, $results);

case 23:

throw new PHPWebDriver_NoSuchWindowWebDriverError($message, $results);

case 24:

throw new PHPWebDriver_InvalidCookieDomainWebDriverError($message, $results);

case 25:

throw new PHPWebDriver_UnableToSetCookieWebDriverError($message, $results);

case 26:

throw new PHPWebDriver_UnexpectedAlertOpenWebDriverError($message, $results);

case 27:

throw new PHPWebDriver_NoAlertOpenWebDriverError($message, $results);

case 28:

throw new PHPWebDriver_TimeOutWebDriverError($message, $results);

case 29:

throw new PHPWebDriver_InvalidElementCoordinatesWebDriverError($message, $results);

case 30:

throw new PHPWebDriver_IMENotAvailableWebDriverError($message, $results);

case 31:

throw new PHPWebDriver_IMEEngineActivationFailedWebDriverError($message, $results);

case 32:

throw new PHPWebDriver_InvalidSelectorWebDriverError($message, $results);

case 500:

throw new PHPWebDriver_InternalServerError($message, $results);

}

}

abstract protected function methods();

protected $url;

public function __construct($url = 'http://localhost:4444/wd/hub') {

$this->url = $url;

}

public function __toString() {

return $this->url;

}

public function getURL() {

return $this->url;

}

/**

protected function curl($http_method,

$command,

$params = null,

$extra_opts = array()) {

if ($params && is_array($params) && $http_method !== 'POST') {

throw new Exception(sprintf(

'The http method called for %s is %s but it has to be POST' .

' if you want to pass the JSON params %s',

$command,

$http_method,

json_encode($params)));

}

$url = sprintf('%s%s', $this->url, $command);

if ($params && (is_int($params) || is_string($params))) {

$url .= '/' . $params;

}

$curl = curl_init($url);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

curl_setopt(

$curl,

CURLOPT_HTTPHEADER,

array(

'Content-Type: application/json;charset=UTF-8',

'Accept: application/json',

'Expect:')

);

if ($http_method === 'POST') {

curl_setopt($curl, CURLOPT_POST, true);

if ($params && is_array($params)) {

// hurray for magic strings!

// due to how the remote server handles upload, they can stomp on special

// unicode denoting characters in the json. so, unescape \uXXXX in the json

// and then re-escape it if it is really \upload which is the prefix for temp

// dir where files uploaded get stashed.

$encoded_params = json_encode($params);

$encoded_params = str_replace('\\\\u', '\\u', $encoded_params);

$encoded_params = str_replace('\\upload', '\\\\upload', $encoded_params);

curl_setopt($curl, CURLOPT_POSTFIELDS, $encoded_params);

} else {

curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-length: 0'));

}

} else if ($http_method == 'DELETE') {

curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');

}

foreach ($extra_opts as $option => $value) {

curl_setopt($curl, $option, $value);

}

$raw_results = trim(PHPWebDriver_WebDriverEnvironment::CurlExec($curl));

// var_dump($raw_results);

$info = curl_getinfo($curl);

if ($error = curl_error($curl)) {

$msg = sprintf(

'Curl error thrown for http %s to %s',

$http_method,

$url);

if ($params && is_array($params)) {

$msg .= sprintf(' with params: %s', json_encode($params));

}

throw new PHPWebDriver_WebDriverCurlException($msg . "\n\n" . $error);

}

curl_close($curl);

$results = json_decode($raw_results, true);

// var_dump($results);

$value = null;

if (is_array($results) && array_key_exists('value', $results)) {

$value = $results['value'];

}

$message = null;

if (is_array($value) && array_key_exists('message', $value)) {

$message = $value['message'];

}

$sessionId="";

if (is_array($results) && array_key_exists('sessionId', $results)) {

$sessionId = "/".$results['sessionId'];

}

self::throwException($results['status'], $message, $results);

return array('value' => $value, 'info' => $info, 'sessionId'=>$sessionId);

}

public function __call($name, $arguments) {

if (count($arguments) > 2) {

throw new Exception(

'Commands should have at most only two parameters,' .

' normally just the JSON Parameter object,' .

' but sometimes curl options as well (mainly for debugging)');

}

if (preg_match('/^(get|post|delete)/', $name, $matches)) {

$http_method = strtoupper($matches[0]);

$webdriver_command = strtolower(substr($name, strlen($http_method)));

$default_http_method = $this->getHTTPMethod($webdriver_command);

if ($http_method === $default_http_method) {

throw new Exception(sprintf(

'%s is the default http method for %s. Please just call %s().',

$http_method,

$webdriver_command,

$webdriver_command));

}

$methods = $this->methods();

if (!in_array($http_method, $methods[$webdriver_command])) {

throw new Exception(sprintf(

'%s is not an available http method for the command %s.',

$http_method,

$webdriver_command));

}

} else {

$webdriver_command = $name;

$http_method = $this->getHTTPMethod($webdriver_command);

}

$params = array_shift($arguments);

$opts = array_shift($arguments);

if (count($opts) == 0) {

$opts = array();

}

$results = $this->curl(

$http_method,

'/' . $webdriver_command,

$params,

$opts);

$value = null;

if (is_array($results) && array_key_exists('value', $results)) {

$value = $results['value'];

}

$message = null;

if (is_array($value) && array_key_exists('message', $value)) {

$message = $value['message'];

}

self::throwException($results['info']['http_code'], $message, $results);

return $results['value'];

}

private function getHTTPMethod($webdriver_command) {

if (!array_key_exists($webdriver_command, $this->methods())) {

throw new Exception(sprintf(

'%s is not a valid webdriver command.',

$webdriver_command));

}

$methods = $this->methods();

$http_methods = (array) $methods[$webdriver_command];

return array_shift($http_methods);

}