Chris@14: <?php
Chris@14: /**
Chris@14:  * Copyright 2004-2017 Facebook. All Rights Reserved.
Chris@14:  *
Chris@14:  * Licensed under the Apache License, Version 2.0 (the "License");
Chris@14:  * you may not use this file except in compliance with the License.
Chris@14:  * You may obtain a copy of the License at
Chris@14:  *
Chris@14:  *     http://www.apache.org/licenses/LICENSE-2.0
Chris@14:  *
Chris@14:  * Unless required by applicable law or agreed to in writing, software
Chris@14:  * distributed under the License is distributed on an "AS IS" BASIS,
Chris@14:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Chris@14:  * See the License for the specific language governing permissions and
Chris@14:  * limitations under the License.
Chris@14:  *
Chris@14:  * @package WebDriver
Chris@14:  *
Chris@14:  * @author Justin Bishop <jubishop@gmail.com>
Chris@14:  * @author Anthon Pang <apang@softwaredevelopment.ca>
Chris@14:  * @author Fabrizio Branca <mail@fabrizio-branca.de>
Chris@14:  * @author Tsz Ming Wong <tszming@gmail.com>
Chris@14:  */
Chris@14: 
Chris@14: namespace WebDriver;
Chris@14: 
Chris@14: use WebDriver\Exception as WebDriverException;
Chris@14: 
Chris@14: /**
Chris@14:  * Abstract WebDriver\AbstractWebDriver class
Chris@14:  *
Chris@14:  * @package WebDriver
Chris@14:  */
Chris@14: abstract class AbstractWebDriver
Chris@14: {
Chris@14:     /**
Chris@14:      * URL
Chris@14:      *
Chris@14:      * @var string
Chris@14:      */
Chris@14:     protected $url;
Chris@14: 
Chris@14:     /**
Chris@14:      * Return array of supported method names and corresponding HTTP request methods
Chris@14:      *
Chris@14:      * @return array
Chris@14:      */
Chris@14:     abstract protected function methods();
Chris@14: 
Chris@14:     /**
Chris@14:      * Return array of obsolete method names and corresponding HTTP request methods
Chris@14:      *
Chris@14:      * @return array
Chris@14:      */
Chris@14:     protected function obsoleteMethods()
Chris@14:     {
Chris@14:         return array();
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Constructor
Chris@14:      *
Chris@14:      * @param string $url URL to Selenium server
Chris@14:      */
Chris@14:     public function __construct($url = 'http://localhost:4444/wd/hub')
Chris@14:     {
Chris@14:         $this->url = $url;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Magic method which returns URL to Selenium server
Chris@14:      *
Chris@14:      * @return string
Chris@14:      */
Chris@14:     public function __toString()
Chris@14:     {
Chris@14:         return $this->url;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Returns URL to Selenium server
Chris@14:      *
Chris@14:      * @return string
Chris@14:      */
Chris@14:     public function getURL()
Chris@14:     {
Chris@14:         return $this->url;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Curl request to webdriver server.
Chris@14:      *
Chris@14:      * @param string $requestMethod HTTP request method, e.g., 'GET', 'POST', or 'DELETE'
Chris@14:      * @param string $command       If not defined in methods() this function will throw.
Chris@14:      * @param array  $parameters    If an array(), they will be posted as JSON parameters
Chris@14:      *                              If a number or string, "/$params" is appended to url
Chris@14:      * @param array  $extraOptions  key=>value pairs of curl options to pass to curl_setopt()
Chris@14:      *
Chris@14:      * @return array array('value' => ..., 'info' => ...)
Chris@14:      *
Chris@14:      * @throws \WebDriver\Exception if error
Chris@14:      */
Chris@14:     protected function curl($requestMethod, $command, $parameters = null, $extraOptions = array())
Chris@14:     {
Chris@14:         if ($parameters && is_array($parameters) && $requestMethod !== 'POST') {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::NO_PARAMETERS_EXPECTED,
Chris@14:                 sprintf(
Chris@14:                     'The http request method called for %s is %s but it has to be POST if you want to pass the JSON parameters %s',
Chris@14:                     $command,
Chris@14:                     $requestMethod,
Chris@14:                     json_encode($parameters)
Chris@14:                 )
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         $url = sprintf('%s%s', $this->url, $command);
Chris@14: 
Chris@14:         if ($parameters && (is_int($parameters) || is_string($parameters))) {
Chris@14:             $url .= '/' . $parameters;
Chris@14:         }
Chris@14: 
Chris@14:         list($rawResult, $info) = ServiceFactory::getInstance()->getService('service.curl')->execute($requestMethod, $url, $parameters, $extraOptions);
Chris@14: 
Chris@14:         $httpCode = $info['http_code'];
Chris@14: 
Chris@14:         // According to https://w3c.github.io/webdriver/webdriver-spec.html all 4xx responses are to be considered
Chris@14:         // an error and return plaintext, while 5xx responses are json encoded
Chris@14:         if ($httpCode >= 400 && $httpCode <= 499) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::CURL_EXEC,
Chris@14:                 'Webdriver http error: ' . $httpCode . ', payload :' . substr($rawResult, 0, 1000)
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         $result = json_decode($rawResult, true);
Chris@14: 
Chris@14:         if (!empty($rawResult) && $result === null && json_last_error() != JSON_ERROR_NONE) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::CURL_EXEC,
Chris@14:                 'Payload received from webdriver is not valid json: ' . substr($rawResult, 0, 1000)
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         if (is_array($result) && !array_key_exists('status', $result)) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::CURL_EXEC,
Chris@14:                 'Payload received from webdriver is valid but unexpected json: ' . substr($rawResult, 0, 1000)
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         $value   = (is_array($result) && array_key_exists('value', $result)) ? $result['value'] : null;
Chris@14:         $message = (is_array($value) && array_key_exists('message', $value)) ? $value['message'] : null;
Chris@14: 
Chris@14:         // if not success, throw exception
Chris@14:         if ((int) $result['status'] !== 0) {
Chris@14:             throw WebDriverException::factory($result['status'], $message);
Chris@14:         }
Chris@14: 
Chris@14:         $sessionId = isset($result['sessionId'])
Chris@14:            ? $result['sessionId']
Chris@14:            : (isset($value['webdriver.remote.sessionid'])
Chris@14:                ? $value['webdriver.remote.sessionid']
Chris@14:                : null
Chris@14:            );
Chris@14: 
Chris@14:         return array(
Chris@14:             'value'      => $value,
Chris@14:             'info'       => $info,
Chris@14:             'sessionId'  => $sessionId,
Chris@14:             'sessionUrl' => $sessionId ? $this->url . '/session/' . $sessionId : $info['url'],
Chris@14:         );
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Magic method that maps calls to class methods to execute WebDriver commands
Chris@14:      *
Chris@14:      * @param string $name      Method name
Chris@14:      * @param array  $arguments Arguments
Chris@14:      *
Chris@14:      * @return mixed
Chris@14:      *
Chris@14:      * @throws \WebDriver\Exception if invalid WebDriver command
Chris@14:      */
Chris@14:     public function __call($name, $arguments)
Chris@14:     {
Chris@14:         if (count($arguments) > 1) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::JSON_PARAMETERS_EXPECTED,
Chris@14:                 'Commands should have at most only one parameter, which should be the JSON Parameter object'
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         if (preg_match('/^(get|post|delete)/', $name, $matches)) {
Chris@14:             $requestMethod = strtoupper($matches[0]);
Chris@14:             $webdriverCommand = strtolower(substr($name, strlen($requestMethod)));
Chris@14:         } else {
Chris@14:             $webdriverCommand = $name;
Chris@14:             $requestMethod = $this->getRequestMethod($webdriverCommand);
Chris@14:         }
Chris@14: 
Chris@14:         $methods = $this->methods();
Chris@14: 
Chris@14:         if (!in_array($requestMethod, (array) $methods[$webdriverCommand])) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 WebDriverException::INVALID_REQUEST,
Chris@14:                 sprintf(
Chris@14:                     '%s is not an available http request method for the command %s.',
Chris@14:                     $requestMethod,
Chris@14:                     $webdriverCommand
Chris@14:                 )
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         $result = $this->curl(
Chris@14:             $requestMethod,
Chris@14:             '/' . $webdriverCommand,
Chris@14:             array_shift($arguments)
Chris@14:         );
Chris@14: 
Chris@14:         return $result['value'];
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Get default HTTP request method for a given WebDriver command
Chris@14:      *
Chris@14:      * @param string $webdriverCommand
Chris@14:      *
Chris@14:      * @return string
Chris@14:      *
Chris@14:      * @throws \WebDriver\Exception if invalid WebDriver command
Chris@14:      */
Chris@14:     private function getRequestMethod($webdriverCommand)
Chris@14:     {
Chris@14:         if (!array_key_exists($webdriverCommand, $this->methods())) {
Chris@14:             throw WebDriverException::factory(
Chris@14:                 array_key_exists($webdriverCommand, $this->obsoleteMethods())
Chris@14:                 ? WebDriverException::OBSOLETE_COMMAND : WebDriverException::UNKNOWN_COMMAND,
Chris@14:                 sprintf('%s is not a valid WebDriver command.', $webdriverCommand)
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         $methods = $this->methods();
Chris@14:         $requestMethods = (array) $methods[$webdriverCommand];
Chris@14: 
Chris@14:         return array_shift($requestMethods);
Chris@14:     }
Chris@14: }