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<?php |
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namespace Lifeboat\SDK\Services; |
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use Lifeboat\SDK\CurlResponse; |
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use Lifeboat\SDK\Exceptions\InvalidArgumentException; |
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use LogicException; |
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/** |
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* Class Curl |
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* @package Lifeboat\SDK |
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*/ |
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class Curl { |
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const ALLOWED_METHODS = ['GET', 'POST', 'DELETE', 'PUT']; |
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const USER_AGENT = 'LifeboatSDK/curl-service'; |
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private static $_cache = []; |
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private $_method = 'GET'; |
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private $_url = ''; |
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private $_data = []; |
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private $_isfile = false; |
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private $_headers = [ |
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'Content-Type' => 'application/x-www-form-urlencoded', |
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'X-Requested-By' => self::USER_AGENT |
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]; |
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private $_enable_cache = false; |
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/** |
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* Curl constructor. |
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* |
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* @param string $url |
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* @param array $data |
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* @param array $headers |
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* |
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* @throws LogicException |
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*/ |
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public function __construct(string $url = null, array $data = [], array $headers = []) |
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{ |
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if (!is_null($url)) $this->setURL($url); |
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foreach ($data as $name => $value) $this->addDataParam($name, $value); |
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foreach ($headers as $name => $value) $this->addHeader($name, $value); |
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} |
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/** |
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* @param string $url |
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* @return Curl |
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*/ |
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public function setURL(string $url): Curl |
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{ |
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$this->_url = $url; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function getURL(): string |
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{ |
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return $this->_url; |
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} |
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/** |
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* @param string $method |
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* @return $this |
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* @throws InvalidArgumentException If $method specified is invalid |
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*/ |
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public function setMethod(string $method = 'GET'): Curl |
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{ |
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if (!in_array($method, self::ALLOWED_METHODS)) { |
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throw new InvalidArgumentException("HTTP Method '{$method}' is not allowed"); |
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} |
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$this->_method = $method; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function getMethod(): string |
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{ |
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return $this->_method; |
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} |
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/** |
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* @param string $name |
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* @param mixed $value |
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* @return $this |
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*/ |
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public function addDataParam(string $name, $value): Curl |
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{ |
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$this->_data[$name] = $value; |
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return $this; |
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} |
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public function removeDataParam(string $name): Curl |
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{ |
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if (array_key_exists($name, $this->_data)) unset($this->_data[$name]); |
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return $this; |
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} |
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/** |
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* @return array |
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*/ |
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public function getDataParams(): array |
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{ |
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return $this->_data; |
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} |
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/** |
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* @param string $name |
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* @param string $value |
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* @return Curl |
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*/ |
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public function addHeader(string $name, string $value): Curl |
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{ |
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$this->_headers[$name] = $value; |
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return $this; |
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} |
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/** |
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* @param string $name |
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* @return Curl |
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*/ |
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public function removeHeader(string $name): Curl |
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{ |
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if (array_key_exists($name, $this->_headers)) unset($this->_headers[$name]); |
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return $this; |
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} |
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/** |
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* @return array |
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*/ |
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public function getHeaders(): array |
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{ |
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return $this->_headers; |
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} |
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public function setIsFileUpload(bool $is_file): Curl |
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{ |
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$this->addHeader('Content-Type', 'multipart/form-data'); |
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$this->_isfile = $is_file; |
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return $this; |
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} |
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public function isFileUpload(): bool |
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{ |
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return $this->_isfile; |
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} |
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/** |
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* @param bool $switch |
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* @return $this |
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*/ |
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public function cacheRequests(bool $switch): Curl |
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{ |
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$this->_enable_cache = $switch; |
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return $this; |
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} |
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/** |
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* @return CurlResponse |
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*/ |
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public function curl(): CurlResponse |
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{ |
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$post_data = null; |
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$send_headers = []; |
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$request_uri = $this->getURL(); |
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// Headers |
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foreach ($this->getHeaders() as $k => $v) $send_headers[] = "{$k}: {$v}"; |
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// Request Data |
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switch ($this->getMethod()) { |
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case 'GET': |
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case 'DELETE': |
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foreach ($this->getDataParams() as $name => $value) $request_uri = $this->setGetVar($name, $value, $request_uri); |
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break; |
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case 'POST': |
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$post_data = ($this->isFileUpload()) ? $this->getDataParams() : http_build_query($this->getDataParams()); |
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break; |
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case 'PUT': |
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$post_data = http_build_query($this->getDataParams()); |
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break; |
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} |
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if ($this->_enable_cache && $this->getMethod() === 'GET') { |
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$cache_key = urlencode($request_uri) . implode(',', $send_headers); |
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if (array_key_exists($cache_key, self::$_cache)) { |
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return self::$_cache[$cache_key]; |
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} |
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} |
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$ch = curl_init(); |
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curl_setopt($ch, CURLOPT_URL, $request_uri); |
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); |
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $this->getMethod()); |
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curl_setopt($ch, CURLOPT_USERAGENT, self::USER_AGENT); |
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
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curl_setopt($ch, CURLOPT_TIMEOUT, 10); |
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curl_setopt($ch, CURLOPT_ENCODING, ''); |
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); |
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curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); |
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curl_setopt($ch, CURLINFO_HEADER_OUT, true); |
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curl_setopt($ch, CURLOPT_AUTOREFERER, true); |
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if (!empty($send_headers)) curl_setopt($ch, CURLOPT_HTTPHEADER, $send_headers); |
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if (!is_null($post_data)) { |
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curl_setopt($ch, CURLOPT_POST, 1); |
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curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); |
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} |
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$result = curl_exec($ch); |
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$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); |
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$response = new CurlResponse($http_code, $result); |
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if ($this->_enable_cache && isset($cache_key)) self::$_cache[$cache_key] = $response; |
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return $response; |
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} |
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/** |
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* @see Curl::curl() |
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* |
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* @return CurlResponse |
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*/ |
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public function curl_json() |
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{ |
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$this->addHeader('Accept', 'application/json'); |
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return $this->curl(); |
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} |
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/** |
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* @param string $key |
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* @param string $value |
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* @param string $url |
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* @return string |
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* @throws InvalidArgumentException If URL is malformed |
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*/ |
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private function setGetVar(string $key, string $value, string $url): string |
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{ |
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if (!self::is_absolute_url($url)) { |
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$isRelative = true; |
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$uri = 'http://dummy.com/' . ltrim($url, '/'); |
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throw new InvalidArgumentException('Curl::setGetVar() requires $url to be an absolute url'); |
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} else { |
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$isRelative = false; |
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$uri = $url; |
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} |
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// try to parse uri |
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$parts = parse_url($uri); |
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if (!$parts) { |
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throw new InvalidArgumentException("Can't parse URL: " . $uri); |
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} |
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// Parse params and add new variable |
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$params = []; |
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if (isset($parts['query'])) { |
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parse_str($parts['query'], $params); |
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} |
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$params[$varname] = $varvalue; |
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// Generate URI segments and formatting |
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$scheme = (isset($parts['scheme'])) ? $parts['scheme'] : 'http'; |
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$user = (isset($parts['user']) && $parts['user'] != '') ? $parts['user'] : ''; |
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if ($user != '') { |
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// format in either user:[email protected] or [email protected] |
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$user .= (isset($parts['pass']) && $parts['pass'] != '') ? ':' . $parts['pass'] . '@' : '@'; |
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} |
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$host = (isset($parts['host'])) ? $parts['host'] : ''; |
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$port = (isset($parts['port']) && $parts['port'] != '') ? ':' . $parts['port'] : ''; |
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$path = (isset($parts['path']) && $parts['path'] != '') ? $parts['path'] : ''; |
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// handle URL params which are existing / new |
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$params = ($params) ? '?' . http_build_query($params, null, $separator) : ''; |
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// keep fragments (anchors) intact. |
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$fragment = (isset($parts['fragment']) && $parts['fragment'] != '') ? '#' . $parts['fragment'] : ''; |
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// Recompile URI segments |
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$newUri = $scheme . '://' . $user . $host . $port . $path . $params . $fragment; |
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if ($isRelative) { |
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return str_replace('http://dummy.com/', '', $newUri); |
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} |
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return $newUri; |
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} |
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/** |
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* @param string $url |
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* @return bool |
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*/ |
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public static function is_absolute_url(string $url): bool |
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{ |
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// Strip off the query and fragment parts of the URL before checking |
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if (($queryPosition = strpos($url, '?')) !== false) { |
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$url = substr($url, 0, $queryPosition - 1); |
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} |
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if (($hashPosition = strpos($url, '#')) !== false) { |
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$url = substr($url, 0, $hashPosition - 1); |
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} |
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$colonPosition = strpos($url, ':'); |
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$slashPosition = strpos($url, '/'); |
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return ( |
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// Base check for existence of a host on a compliant URL |
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parse_url($url, PHP_URL_HOST) |
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// Check for more than one leading slash without a protocol. |
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// While not a RFC compliant absolute URL, it is completed to a valid URL by some browsers, |
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// and hence a potential security risk. Single leading slashes are not an issue though. |
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|| preg_match('%^\s*/{2,}%', $url) |
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|| ( |
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// If a colon is found, check if it's part of a valid scheme definition |
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// (meaning its not preceded by a slash). |
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$colonPosition !== false |
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&& ($slashPosition === false || $colonPosition < $slashPosition) |
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) |
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); |
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} |
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} |
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.