mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-09-08 10:41:25 +02:00
Provides an interface for classes to implement their own flush() functionality. This function gets called early in a request on all implementations of Flushable when flush=1|all is requested in the URL. This fix came out of an issue where Requirements combined files were not being cleaned up after dev/build?flush=1, due to the fact that flush would only occur when you called it while on a page that used those combined files, but not in any other contexts. This will now call flush on any implementors of Flushable regardless of the context of where flush was called.
687 lines
20 KiB
PHP
687 lines
20 KiB
PHP
<?php
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/**
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* RestfulService class allows you to consume various RESTful APIs.
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*
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* Through this you could connect and aggregate data of various web services.
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*
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* @see http://doc.silverstripe.org/framework/en/reference/restfulservice
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*
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* @package framework
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* @subpackage integration
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*/
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class RestfulService extends ViewableData implements Flushable {
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protected $baseURL;
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protected $queryString;
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protected $errorTag;
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protected $checkErrors;
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protected $connectTimeout = 5;
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protected $cache_expire;
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protected $authUsername, $authPassword;
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protected $customHeaders = array();
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protected $proxy;
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/**
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* @config
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* @var array
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*/
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private static $default_proxy;
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/**
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* @config
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* @var array
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*/
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private static $default_curl_options = array();
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/**
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* @config
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* @var bool Flushes caches if set to true. This is set by {@link flush()}
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*/
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private static $flush = false;
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/**
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* Triggered early in the request when someone requests a flush.
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*/
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public static function flush() {
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self::$flush = true;
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}
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/**
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* set a curl option that will be applied to all requests as default
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* {@see http://php.net/manual/en/function.curl-setopt.php#refsect1-function.curl-setopt-parameters}
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*
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* @deprecated 3.2 Use the "RestfulService.default_curl_options" config setting instead
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* @param int $option The cURL opt Constant
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* @param mixed $value The cURL opt value
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*/
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public static function set_default_curl_option($option, $value) {
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Deprecation::notice('3.2', 'Use the "RestfulService.default_curl_options" config setting instead');
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Config::inst()->update('RestfulService', 'default_curl_options', array($option => $value));
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}
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/**
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* set many defauly curl options at once
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*
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* @deprecated 3.2 Use the "RestfulService.default_curl_options" config setting instead
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*/
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public static function set_default_curl_options($optionArray) {
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Deprecation::notice('3.2', 'Use the "RestfulService.default_curl_options" config setting instead');
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Config::inst()->update('RestfulService', 'default_curl_options', $optionArray);
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}
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/**
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* Sets default proxy settings for outbound RestfulService connections
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*
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* @param string $proxy The URL of the proxy to use.
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* @param int $port Proxy port
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* @param string $user The proxy auth user name
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* @param string $password The proxy auth password
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* @param boolean $socks Set true to use socks5 proxy instead of http
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* @deprecated 3.2 Use the "RestfulService.default_curl_options" config setting instead,
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* with direct reference to the CURL_* options
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*/
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public static function set_default_proxy($proxy, $port = 80, $user = "", $password = "", $socks = false) {
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Deprecation::notice(
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'3.1',
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'Use the "RestfulService.default_curl_options" config setting instead, '
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. 'with direct reference to the CURL_* options'
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);
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config::inst()->update('RestfulService', 'default_proxy', array(
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CURLOPT_PROXY => $proxy,
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CURLOPT_PROXYUSERPWD => "{$user}:{$password}",
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CURLOPT_PROXYPORT => $port,
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CURLOPT_PROXYTYPE => ($socks ? CURLPROXY_SOCKS5 : CURLPROXY_HTTP)
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));
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}
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/**
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* Creates a new restful service.
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* @param string $base Base URL of the web service eg: api.example.com
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* @param int $expiry Set the cache expiry interva. Defaults to 1 hour (3600 seconds)
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*/
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public function __construct($base, $expiry=3600){
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$this->baseURL = $base;
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$this->cache_expire = $expiry;
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parent::__construct();
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$this->proxy = $this->config()->default_proxy;
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}
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/**
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* Sets the Query string parameters to send a request.
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* @param array $params An array passed with necessary parameters.
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*/
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public function setQueryString($params=NULL){
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$this->queryString = http_build_query($params,'','&');
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}
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/**
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* Set proxy settings for this RestfulService instance
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*
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* @param string $proxy The URL of the proxy to use.
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* @param int $port Proxy port
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* @param string $user The proxy auth user name
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* @param string $password The proxy auth password
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* @param boolean $socks Set true to use socks5 proxy instead of http
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*/
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public function setProxy($proxy, $port = 80, $user = "", $password = "", $socks = false) {
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$this->proxy = array(
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CURLOPT_PROXY => $proxy,
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CURLOPT_PROXYUSERPWD => "{$user}:{$password}",
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CURLOPT_PROXYPORT => $port,
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CURLOPT_PROXYTYPE => ($socks ? CURLPROXY_SOCKS5 : CURLPROXY_HTTP)
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);
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}
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/**
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* Set basic authentication
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*/
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public function basicAuth($username, $password) {
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$this->authUsername = $username;
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$this->authPassword = $password;
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}
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/**
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* Set a custom HTTP header
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*/
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public function httpHeader($header) {
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$this->customHeaders[] = $header;
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}
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protected function constructURL(){
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return "$this->baseURL" . ($this->queryString ? "?$this->queryString" : "");
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}
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/**
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* Makes a request to the RESTful server, and return a {@link RestfulService_Response} object for parsing of the
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* result.
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*
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* @todo Better POST, PUT, DELETE, and HEAD support
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* @todo Caching of requests - probably only GET and HEAD requestst
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* @todo JSON support in RestfulService_Response
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* @todo Pass the response headers to RestfulService_Response
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*
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* This is a replacement of {@link connect()}.
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*
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* @return RestfulService_Response - If curl request produces error, the returned response's status code will
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* be 500
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*/
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public function request($subURL = '', $method = "GET", $data = null, $headers = null, $curlOptions = array()) {
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$url = $this->getAbsoluteRequestURL($subURL);
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$method = strtoupper($method);
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assert(in_array($method, array('GET','POST','PUT','DELETE','HEAD','OPTIONS')));
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$cache_path = $this->getCachePath(array(
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$url,
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$method,
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$data,
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array_merge((array)$this->customHeaders, (array)$headers),
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$curlOptions + (array)$this->config()->default_curl_options,
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$this->getBasicAuthString()
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));
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// Check for unexpired cached feed (unless flush is set)
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//assume any cache_expire that is 0 or less means that we dont want to
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// cache
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if($this->cache_expire > 0 && self::$flush
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&& @file_exists($cache_path)
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&& @filemtime($cache_path) + $this->cache_expire > time()) {
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$store = file_get_contents($cache_path);
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$response = unserialize($store);
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} else {
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$response = $this->curlRequest($url, $method, $data, $headers, $curlOptions);
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if(!$response->isError()) {
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// Serialise response object and write to cache
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$store = serialize($response);
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file_put_contents($cache_path, $store);
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}
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else {
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// In case of curl or/and http indicate error, populate response's cachedBody property
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// with cached response body with the cache file exists
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if (@file_exists($cache_path)) {
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$store = file_get_contents($cache_path);
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$cachedResponse = unserialize($store);
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$response->setCachedResponse($cachedResponse);
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}
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else {
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$response->setCachedResponse(false);
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}
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}
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}
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return $response;
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}
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/**
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* Actually performs a remote service request using curl. This is used by
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* {@link RestfulService::request()}.
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*
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* @param string $url
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* @param string $method
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* @param array $data
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* @param array $headers
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* @param array $curlOptions
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* @return RestfulService_Response
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*/
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public function curlRequest($url, $method, $data = null, $headers = null, $curlOptions = array()) {
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$ch = curl_init();
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$sapphireInfo = new SapphireInfo();
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$useragent = 'SilverStripe/' . $sapphireInfo->Version();
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$curlOptions = $curlOptions + (array)$this->config()->default_curl_options;
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->getConnectTimeout());
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if(!ini_get('open_basedir')) curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
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// Write headers to a temporary file
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$headerfd = tmpfile();
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curl_setopt($ch, CURLOPT_WRITEHEADER, $headerfd);
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// Add headers
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if($this->customHeaders) {
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$headers = array_merge((array)$this->customHeaders, (array)$headers);
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}
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if($headers) curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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// Add authentication
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if($this->authUsername) curl_setopt($ch, CURLOPT_USERPWD, $this->getBasicAuthString());
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// Add fields to POST and PUT requests
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if($method == 'POST') {
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curl_setopt($ch, CURLOPT_POST, 1);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
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} elseif($method == 'PUT') {
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$put = fopen("php://temp", 'r+');
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fwrite($put, $data);
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fseek($put, 0);
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curl_setopt($ch, CURLOPT_PUT, 1);
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curl_setopt($ch, CURLOPT_INFILE, $put);
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curl_setopt($ch, CURLOPT_INFILESIZE, strlen($data));
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}
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// Apply proxy settings
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if(is_array($this->proxy)) {
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curl_setopt_array($ch, $this->proxy);
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}
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// Set any custom options passed to the request() function
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curl_setopt_array($ch, $curlOptions);
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// Run request
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$body = curl_exec($ch);
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rewind($headerfd);
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$headers = stream_get_contents($headerfd);
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fclose($headerfd);
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$response = $this->extractResponse($ch, $headers, $body);
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curl_close($ch);
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return $response;
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}
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/**
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* A function to return the auth string. This helps consistency through the
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* class but also allows tests to pull it out when generating the expected
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* cache keys
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*
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* @see {self::getCachePath()}
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* @see {RestfulServiceTest::createFakeCachedResponse()}
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*
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* @return string The auth string to be base64 encoded
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*/
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protected function getBasicAuthString() {
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return $this->authUsername . ':' . $this->authPassword;
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}
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/**
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* Generate a cache key based on any cache data sent. The cache data can be
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* any type
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*
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* @param mixed $cacheData The cache seed for generating the key
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* @param string the md5 encoded cache seed.
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*/
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protected function generateCacheKey($cacheData) {
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return md5(var_export($cacheData, true));
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}
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/**
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* Generate the cache path
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*
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* This is mainly so that the cache path can be generated in a consistent
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* way in tests without having to hard code the cachekey generate function
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* in tests
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*
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* @param mixed $cacheData The cache seed {@see self::generateCacheKey}
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*
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* @return string The path to the cache file
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*/
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protected function getCachePath($cacheData) {
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return TEMP_FOLDER . "/xmlresponse_" . $this->generateCacheKey($cacheData);
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}
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/**
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* Extracts the response body and headers from a full curl response
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*
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* @param curl_handle $ch The curl handle for the request
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* @param string $rawResponse The raw response text
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*
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* @return RestfulService_Response The response object
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*/
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protected function extractResponse($ch, $rawHeaders, $rawBody) {
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//get the status code
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$statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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//get a curl error if there is one
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$curlError = curl_error($ch);
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//normalise the status code
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if(curl_error($ch) !== '' || $statusCode == 0) $statusCode = 500;
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//parse the headers
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$parts = array_filter(explode("\r\n\r\n", $rawHeaders));
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$lastHeaders = array_pop($parts);
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$headers = $this->parseRawHeaders($lastHeaders);
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//return the response object
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return new RestfulService_Response($rawBody, $statusCode, $headers);
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}
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/**
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* Takes raw headers and parses them to turn them to an associative array
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*
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* Any header that we see more than once is turned into an array.
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*
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* This is meant to mimic http_parse_headers {@link http://php.net/manual/en/function.http-parse-headers.php}
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* thanks to comment #77241 on that page for foundation of this
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*
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* @param string $rawHeaders The raw header string
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* @return array The assosiative array of headers
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*/
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protected function parseRawHeaders($rawHeaders) {
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$headers = array();
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$fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $rawHeaders));
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foreach( $fields as $field ) {
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if( preg_match('/([^:]+): (.+)/m', $field, $match) ) {
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$match[1] = preg_replace_callback(
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'/(?<=^|[\x09\x20\x2D])./',
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create_function('$matches', 'return strtoupper($matches[0]);'),
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trim($match[1])
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);
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if( isset($headers[$match[1]]) ) {
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if (!is_array($headers[$match[1]])) {
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$headers[$match[1]] = array($headers[$match[1]]);
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}
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$headers[$match[1]][] = $match[2];
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} else {
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$headers[$match[1]] = trim($match[2]);
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}
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}
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}
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return $headers;
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}
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/**
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* Returns a full request url
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* @param string
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*/
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public function getAbsoluteRequestURL($subURL) {
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$url = $this->baseURL . $subURL; // Url for the request
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if($this->queryString) {
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if(strpos($url, '?') !== false) {
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$url .= '&' . $this->queryString;
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} else {
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$url .= '?' . $this->queryString;
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}
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}
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return str_replace(' ', '%20', $url); // Encode spaces
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}
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/**
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* Gets attributes as an array, of a particular type of element.
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* Example : <photo id="2636" owner="123" secret="ab128" server="2">
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* returns id, owner,secret and sever attribute values of all such photo elements.
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* @param string $xml The source xml to parse, this could be the original response received.
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* @param string $collection The name of parent node which wraps the elements, if available
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* @param string $element The element we need to extract the attributes.
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*/
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public function getAttributes($xml, $collection=NULL, $element=NULL){
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$xml = new SimpleXMLElement($xml);
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$output = new ArrayList();
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if($collection)
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$childElements = $xml->{$collection};
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if($element)
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$childElements = $xml->{$collection}->{$element};
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if($childElements){
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foreach($childElements as $child){
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$data = array();
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foreach($child->attributes() as $key => $value){
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$data["$key"] = Convert::raw2xml($value);
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}
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$output->push(new ArrayData($data));
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}
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}
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return $output;
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}
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/**
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* Gets an attribute of a particular element.
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* @param string $xml The source xml to parse, this could be the original response received.
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* @param string $collection The name of the parent node which wraps the element, if available
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* @param string $element The element we need to extract the attribute
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* @param string $attr The name of the attribute
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*/
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public function getAttribute($xml, $collection=NULL, $element=NULL, $attr){
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$xml = new SimpleXMLElement($xml);
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$attr_value = "";
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if($collection)
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$childElements = $xml->{$collection};
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if($element)
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$childElements = $xml->{$collection}->{$element};
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if($childElements)
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$attr_value = (string) $childElements[$attr];
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return Convert::raw2xml($attr_value);
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}
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/**
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* Gets set of node values as an array.
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* When you get to the depth in the hierarchy use node_child_subchild syntax to get the value.
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* @param string $xml The the source xml to parse, this could be the original response received.
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* @param string $collection The name of parent node which wraps the elements, if available
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* @param string $element The element we need to extract the node values.
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*/
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public function getValues($xml, $collection=NULL, $element=NULL){
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$xml = new SimpleXMLElement($xml);
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$output = new ArrayList();
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$childElements = $xml;
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if($collection)
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$childElements = $xml->{$collection};
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if($element)
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$childElements = $xml->{$collection}->{$element};
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if($childElements){
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foreach($childElements as $child){
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$data = array();
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$this->getRecurseValues($child,$data);
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$output->push(new ArrayData($data));
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}
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}
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return $output;
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}
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protected function getRecurseValues($xml,&$data,$parent=""){
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$conv_value = "";
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$child_count = 0;
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foreach($xml as $key=>$value)
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{
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$child_count++;
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$k = ($parent == "") ? (string)$key : $parent . "_" . (string)$key;
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if($this->getRecurseValues($value,$data,$k) == 0){ // no childern, aka "leaf node"
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$conv_value = Convert::raw2xml($value);
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}
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//Review the fix for similar node names overriding it's predecessor
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if(array_key_exists($k, $data) == true) {
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$data[$k] = $data[$k] . ",". $conv_value;
|
|
}
|
|
else {
|
|
$data[$k] = $conv_value;
|
|
}
|
|
|
|
|
|
}
|
|
return $child_count;
|
|
|
|
}
|
|
|
|
/**
|
|
* Gets a single node value.
|
|
* @param string $xml The source xml to parse, this could be the original response received.
|
|
* @param string $collection The name of parent node which wraps the elements, if available
|
|
* @param string $element The element we need to extract the node value.
|
|
*/
|
|
|
|
public function getValue($xml, $collection=NULL, $element=NULL){
|
|
$xml = new SimpleXMLElement($xml);
|
|
|
|
if($collection)
|
|
$childElements = $xml->{$collection};
|
|
if($element)
|
|
$childElements = $xml->{$collection}->{$element};
|
|
|
|
if($childElements)
|
|
return Convert::raw2xml($childElements);
|
|
}
|
|
|
|
/**
|
|
* Searches for a node in document tree and returns it value.
|
|
* @param string $xml source xml to parse, this could be the original response received.
|
|
* @param string $node Node to search for
|
|
*/
|
|
public function searchValue($xml, $node=NULL){
|
|
$xml = new SimpleXMLElement($xml);
|
|
$childElements = $xml->xpath($node);
|
|
|
|
if($childElements)
|
|
return Convert::raw2xml($childElements[0]);
|
|
}
|
|
|
|
/**
|
|
* Searches for a node in document tree and returns its attributes.
|
|
* @param string $xml the source xml to parse, this could be the original response received.
|
|
* @param string $node Node to search for
|
|
*/
|
|
public function searchAttributes($xml, $node=NULL){
|
|
$xml = new SimpleXMLElement($xml);
|
|
$output = new ArrayList();
|
|
|
|
$childElements = $xml->xpath($node);
|
|
|
|
if($childElements)
|
|
foreach($childElements as $child){
|
|
$data = array();
|
|
foreach($child->attributes() as $key => $value){
|
|
$data["$key"] = Convert::raw2xml($value);
|
|
}
|
|
|
|
$output->push(new ArrayData($data));
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Set the connection timeout for the curl request in seconds.
|
|
*
|
|
* @see http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTCONNECTTIMEOUT
|
|
*
|
|
* @param int
|
|
*
|
|
* @return RestfulService
|
|
*/
|
|
public function setConnectTimeout($timeout) {
|
|
$this->connectTimeout = $timeout;
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Return the connection timeout value.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getConnectTimeout() {
|
|
return $this->connectTimeout;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @package framework
|
|
* @subpackage integration
|
|
*/
|
|
class RestfulService_Response extends SS_HTTPResponse {
|
|
protected $simpleXML;
|
|
|
|
/**
|
|
* @var boolean It should be populated with cached request
|
|
* when a request referring to this response was unsuccessful
|
|
*/
|
|
protected $cachedResponse = false;
|
|
|
|
public function __construct($body, $statusCode = 200, $headers = null) {
|
|
$this->setbody($body);
|
|
$this->setStatusCode($statusCode);
|
|
$this->headers = $headers;
|
|
}
|
|
|
|
public function simpleXML() {
|
|
if(!$this->simpleXML) {
|
|
try {
|
|
$this->simpleXML = new SimpleXMLElement($this->body);
|
|
}
|
|
catch(Exception $e) {
|
|
user_error("String could not be parsed as XML. " . $e, E_USER_WARNING);
|
|
}
|
|
}
|
|
return $this->simpleXML;
|
|
}
|
|
|
|
/**
|
|
* get the cached response object. This allows you to access the cached
|
|
* eaders, not just the cached body.
|
|
*
|
|
* @return RestfulSerivice_Response The cached response object
|
|
*/
|
|
public function getCachedResponse() {
|
|
return $this->cachedResponse;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
*/
|
|
public function getCachedBody() {
|
|
if ($this->cachedResponse) {
|
|
return $this->cachedResponse->getBody();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string
|
|
*/
|
|
public function setCachedBody($content) {
|
|
Deprecation::notice('3.2', 'Setting the response body is now deprecated, set the cached request instead');
|
|
if (!$this->cachedResponse) {
|
|
$this->cachedResponse = new RestfulService_Response($content);
|
|
}
|
|
else {
|
|
$this->cachedResponse->setBody($content);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string
|
|
*/
|
|
public function setCachedResponse($response) {
|
|
$this->cachedResponse = $response;
|
|
}
|
|
|
|
/**
|
|
* Return an array of xpath matches
|
|
*/
|
|
public function xpath($xpath) {
|
|
return $this->simpleXML()->xpath($xpath);
|
|
}
|
|
|
|
/**
|
|
* Return the first xpath match
|
|
*/
|
|
public function xpath_one($xpath) {
|
|
$items = $this->xpath($xpath);
|
|
if (isset($items[0])) {
|
|
return $items[0];
|
|
}
|
|
}
|
|
}
|