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<?php |
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namespace GinoPane\NanoRest\Supplemental; |
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use GinoPane\NanoRest\{ |
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Request\RequestContext, |
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Exceptions\TransportException |
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}; |
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class CurlHelper |
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{ |
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/** |
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* Get a customized request handler to perform calls |
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* |
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* @param RequestContext $context |
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* |
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* @return resource |
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*/ |
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public function getRequestHandle(RequestContext $context) |
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{ |
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$curlHandle = curl_init(); |
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$defaults = [ |
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CURLOPT_ENCODING => "", |
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CURLOPT_USERAGENT => "php-nano-rest", |
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CURLOPT_HEADER => true, |
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CURLOPT_HTTPHEADER => array_values($context->getRequestHeaders()), |
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CURLOPT_RETURNTRANSFER => true, |
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]; |
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$defaults += $this->getCurlTimeoutSettings($context); |
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$defaults += $this->getCurlSslSettings(); |
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if (!is_null($context->getProxy())) { |
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$defaults[CURLOPT_PROXY] = $context->getProxy(); |
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} |
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$dataAndMethodOptions = $this->getRequestDataAndMethodOptions($context); |
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curl_setopt_array($curlHandle, $context->getCurlOptions() + $defaults + $dataAndMethodOptions); |
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return $curlHandle; |
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} |
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/** |
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* Execute curl handle |
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* |
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* @param resource $curlHandle |
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* |
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* @throws TransportException |
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* |
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* @return mixed |
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*/ |
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public function executeRequestHandle($curlHandle) |
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{ |
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curl_setopt($curlHandle, CURLOPT_VERBOSE, true); |
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$verbose = fopen('php://temp', 'w+'); |
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curl_setopt($curlHandle, CURLOPT_STDERR, $verbose); |
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@list($headers, $response) = explode("\r\n\r\n", curl_exec($curlHandle), 2); |
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$error = curl_error($curlHandle); |
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$errorNumber = curl_errno($curlHandle); |
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$httpStatus = curl_getinfo($curlHandle, CURLINFO_HTTP_CODE); |
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curl_close($curlHandle); |
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$this->handleCurlError($error, $errorNumber, $verbose); |
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return [ |
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'response' => $response, |
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'httpStatus' => $httpStatus, |
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'headers' => $headers |
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]; |
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} |
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/** |
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* Get SSL settings for CURL handler |
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* |
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* @link https://curl.haxx.se/docs/caextract.html |
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* |
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* @return array |
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*/ |
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private function getCurlSslSettings(): array |
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{ |
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return [ |
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CURLOPT_SSL_VERIFYPEER => true, |
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CURLOPT_SSL_VERIFYHOST => 2, |
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CURLOPT_CAINFO => ROOT_DIRECTORY . DIRECTORY_SEPARATOR . 'cacert.pem' |
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]; |
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} |
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/** |
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* Get timeout settings for CURL handler |
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* |
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* @link https://curl.haxx.se/libcurl/c/CURLOPT_TIMEOUT_MS.html |
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* @link https://curl.haxx.se/libcurl/c/CURLOPT_CONNECTTIMEOUT_MS.html |
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* |
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* @param RequestContext $context |
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* |
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* @return array |
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*/ |
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private function getCurlTimeoutSettings(RequestContext $context): array |
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{ |
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$timeoutOptions = []; |
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$timeout = $context->getTimeout(); |
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$timeoutOptions += $this->fillTimeoutOptions($timeout, CURLOPT_TIMEOUT, CURLOPT_TIMEOUT_MS); |
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$connectionTimeout = $context->getConnectionTimeout(); |
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$timeoutOptions += $this->fillTimeoutOptions( |
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$connectionTimeout, //@codeCoverageIgnore |
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CURLOPT_CONNECTTIMEOUT, |
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CURLOPT_CONNECTTIMEOUT_MS |
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); |
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return $timeoutOptions; |
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} |
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/** |
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* @param RequestContext $context |
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* |
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* @return array |
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*/ |
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private function getRequestDataAndMethodOptions(RequestContext $context) |
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{ |
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$curlOptions = array(); |
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$requestData = $context->getData(); |
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$requestData = is_array($requestData) ? http_build_query($requestData) : $requestData; |
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$url = $context->getRequestUri(); |
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switch ($context->getMethod()) { |
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case RequestContext::METHOD_GET: |
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$curlOptions[CURLOPT_HTTPGET] = 1; |
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$url .= (strpos($url, '?') === false ? '?' : '') . $requestData; |
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break; |
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case RequestContext::METHOD_POST: |
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$curlOptions[CURLOPT_POST] = 1; |
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$curlOptions[CURLOPT_POSTFIELDS] = $requestData; |
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break; |
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default: |
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$curlOptions[CURLOPT_CUSTOMREQUEST] = $context->getMethod(); |
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$curlOptions[CURLOPT_POSTFIELDS] = $requestData; |
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} |
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$curlOptions[CURLOPT_URL] = $url; |
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return $curlOptions; |
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} |
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/** |
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* @param $error |
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* @param $errorNumber |
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* @param $verbose |
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* |
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* @throws TransportException |
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*/ |
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private function handleCurlError($error, $errorNumber, $verbose): void |
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{ |
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if (!$error) { |
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return; |
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} |
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$errorMessage = "\ncURL transport error: $errorNumber - $error"; |
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$transportException = new TransportException($errorMessage); |
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rewind($verbose); |
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$verboseLog = stream_get_contents($verbose); |
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if ($verboseLog) { |
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$verboseLog = htmlspecialchars($verboseLog); |
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$transportException->setData($verboseLog); |
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} |
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throw $transportException; |
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} |
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/** |
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* Fill timeout options |
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* |
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* @param $timeout |
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* @param $optionName |
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* @param $optionNameMs |
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* |
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* @return array |
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*/ |
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private function fillTimeoutOptions($timeout, $optionName, $optionNameMs): array |
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{ |
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$timeoutOptions = []; |
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if (is_int($timeout)) { |
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$timeoutOptions[$optionName] = $timeout; |
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} elseif (is_float($timeout)) { |
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$timeoutOptions[$optionNameMs] = $timeout * 1000; |
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$timeoutOptions[CURLOPT_NOSIGNAL] = 1; |
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} |
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return $timeoutOptions; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: