<?php

namespace YoastSEO_Vendor\GuzzleHttp\Handler;

use YoastSEO_Vendor\GuzzleHttp\Exception\ConnectException;
use YoastSEO_Vendor\GuzzleHttp\Exception\RequestException;
use YoastSEO_Vendor\GuzzleHttp\Promise\FulfilledPromise;
use YoastSEO_Vendor\GuzzleHttp\Psr7;
use YoastSEO_Vendor\GuzzleHttp\Psr7\LazyOpenStream;
use YoastSEO_Vendor\GuzzleHttp\TransferStats;
use YoastSEO_Vendor\Psr\Http\Message\RequestInterface;
/**
 * Creates curl resources from a request
 */
class CurlFactory implements \YoastSEO_Vendor\GuzzleHttp\Handler\CurlFactoryInterface
{
    const CURL_VERSION_STR = 'curl_version';
    const LOW_CURL_VERSION_NUMBER = '7.21.2';
    /** @var array */
    private $handles = [];
    /** @var int Total number of idle handles to keep in cache */
    private $maxHandles;
    /**
     * @param int $maxHandles Maximum number of idle handles.
     */
    public function __construct($maxHandles)
    {
        $this->maxHandles = $maxHandles;
    }
    public function create(\YoastSEO_Vendor\Psr\Http\Message\RequestInterface $request, array $options)
    {
        if (isset($options['curl']['body_as_string'])) {
            $options['_body_as_string'] = $options['curl']['body_as_string'];
            unset($options['curl']['body_as_string']);
        }
        $easy = new \YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle();
        $easy->request = $request;
        $easy->options = $options;
        $conf = $this->getDefaultConf($easy);
        $this->applyMethod($easy, $conf);
        $this->applyHandlerOptions($easy, $conf);
        $this->applyHeaders($easy, $conf);
        unset($conf['_headers']);
        // Add handler options from the request configuration options
        if (isset($options['curl'])) {
            $conf = \array_replace($conf, $options['curl']);
        }
        $conf[\CURLOPT_HEADERFUNCTION] = $this->createHeaderFn($easy);
        $easy->handle = $this->handles ? \array_pop($this->handles) : \curl_init();
        \curl_setopt_array($easy->handle, $conf);
        return $easy;
    }
    public function release(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy)
    {
        $resource = $easy->handle;
        unset($easy->handle);
        if (\count($this->handles) >= $this->maxHandles) {
            \curl_close($resource);
        } else {
            // Remove all callback functions as they can hold onto references
            // and are not cleaned up by curl_reset. Using curl_setopt_array
            // does not work for some reason, so removing each one
            // individually.
            \curl_setopt($resource, \CURLOPT_HEADERFUNCTION, null);
            \curl_setopt($resource, \CURLOPT_READFUNCTION, null);
            \curl_setopt($resource, \CURLOPT_WRITEFUNCTION, null);
            \curl_setopt($resource, \CURLOPT_PROGRESSFUNCTION, null);
            \curl_reset($resource);
            $this->handles[] = $resource;
        }
    }
    /**
     * Completes a cURL transaction, either returning a response promise or a
     * rejected promise.
     *
     * @param callable             $handler
     * @param EasyHandle           $easy
     * @param CurlFactoryInterface $factory Dictates how the handle is released
     *
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public static function finish(callable $handler, \YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, \YoastSEO_Vendor\GuzzleHttp\Handler\CurlFactoryInterface $factory)
    {
        if (isset($easy->options['on_stats'])) {
            self::invokeStats($easy);
        }
        if (!$easy->response || $easy->errno) {
            return self::finishError($handler, $easy, $factory);
        }
        // Return the response if it is present and there is no error.
        $factory->release($easy);
        // Rewind the body of the response if possible.
        $body = $easy->response->getBody();
        if ($body->isSeekable()) {
            $body->rewind();
        }
        return new \YoastSEO_Vendor\GuzzleHttp\Promise\FulfilledPromise($easy->response);
    }
    private static function invokeStats(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy)
    {
        $curlStats = \curl_getinfo($easy->handle);
        $curlStats['appconnect_time'] = \curl_getinfo($easy->handle, \CURLINFO_APPCONNECT_TIME);
        $stats = new \YoastSEO_Vendor\GuzzleHttp\TransferStats($easy->request, $easy->response, $curlStats['total_time'], $easy->errno, $curlStats);
        \call_user_func($easy->options['on_stats'], $stats);
    }
    private static function finishError(callable $handler, \YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, \YoastSEO_Vendor\GuzzleHttp\Handler\CurlFactoryInterface $factory)
    {
        // Get error information and release the handle to the factory.
        $ctx = ['errno' => $easy->errno, 'error' => \curl_error($easy->handle), 'appconnect_time' => \curl_getinfo($easy->handle, \CURLINFO_APPCONNECT_TIME)] + \curl_getinfo($easy->handle);
        $ctx[self::CURL_VERSION_STR] = \curl_version()['version'];
        $factory->release($easy);
        // Retry when nothing is present or when curl failed to rewind.
        if (empty($easy->options['_err_message']) && (!$easy->errno || $easy->errno == 65)) {
            return self::retryFailedRewind($handler, $easy, $ctx);
        }
        return self::createRejection($easy, $ctx);
    }
    private static function createRejection(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, array $ctx)
    {
        static $connectionErrors = [\CURLE_OPERATION_TIMEOUTED => \true, \CURLE_COULDNT_RESOLVE_HOST => \true, \CURLE_COULDNT_CONNECT => \true, \CURLE_SSL_CONNECT_ERROR => \true, \CURLE_GOT_NOTHING => \true];
        // If an exception was encountered during the onHeaders event, then
        // return a rejected promise that wraps that exception.
        if ($easy->onHeadersException) {
            return \YoastSEO_Vendor\GuzzleHttp\Promise\rejection_for(new \YoastSEO_Vendor\GuzzleHttp\Exception\RequestException('An error was encountered during the on_headers event', $easy->request, $easy->response, $easy->onHeadersException, $ctx));
        }
        if (\version_compare($ctx[self::CURL_VERSION_STR], self::LOW_CURL_VERSION_NUMBER)) {
            $message = \sprintf('cURL error %s: %s (%s)', $ctx['errno'], $ctx['error'], 'see https://curl.haxx.se/libcurl/c/libcurl-errors.html');
        } else {
            $message = \sprintf('cURL error %s: %s (%s) for %s', $ctx['errno'], $ctx['error'], 'see https://curl.haxx.se/libcurl/c/libcurl-errors.html', $easy->request->getUri());
        }
        // Create a connection exception if it was a specific error code.
        $error = isset($connectionErrors[$easy->errno]) ? new \YoastSEO_Vendor\GuzzleHttp\Exception\ConnectException($message, $easy->request, null, $ctx) : new \YoastSEO_Vendor\GuzzleHttp\Exception\RequestException($message, $easy->request, $easy->response, null, $ctx);
        return \YoastSEO_Vendor\GuzzleHttp\Promise\rejection_for($error);
    }
    private function getDefaultConf(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy)
    {
        $conf = ['_headers' => $easy->request->getHeaders(), \CURLOPT_CUSTOMREQUEST => $easy->request->getMethod(), \CURLOPT_URL => (string) $easy->request->getUri()->withFragment(''), \CURLOPT_RETURNTRANSFER => \false, \CURLOPT_HEADER => \false, \CURLOPT_CONNECTTIMEOUT => 150];
        if (\defined('CURLOPT_PROTOCOLS')) {
            $conf[\CURLOPT_PROTOCOLS] = \CURLPROTO_HTTP | \CURLPROTO_HTTPS;
        }
        $version = $easy->request->getProtocolVersion();
        if ($version == 1.1) {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_1_1;
        } elseif ($version == 2.0) {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_2_0;
        } else {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_1_0;
        }
        return $conf;
    }
    private function applyMethod(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, array &$conf)
    {
        $body = $easy->request->getBody();
        $size = $body->getSize();
        if ($size === null || $size > 0) {
            $this->applyBody($easy->request, $easy->options, $conf);
            return;
        }
        $method = $easy->request->getMethod();
        if ($method === 'PUT' || $method === 'POST') {
            // See http://tools.ietf.org/html/rfc7230#section-3.3.2
            if (!$easy->request->hasHeader('Content-Length')) {
                $conf[\CURLOPT_HTTPHEADER][] = 'Content-Length: 0';
            }
        } elseif ($method === 'HEAD') {
            $conf[\CURLOPT_NOBODY] = \true;
            unset($conf[\CURLOPT_WRITEFUNCTION], $conf[\CURLOPT_READFUNCTION], $conf[\CURLOPT_FILE], $conf[\CURLOPT_INFILE]);
        }
    }
    private function applyBody(\YoastSEO_Vendor\Psr\Http\Message\RequestInterface $request, array $options, array &$conf)
    {
        $size = $request->hasHeader('Content-Length') ? (int) $request->getHeaderLine('Content-Length') : null;
        // Send the body as a string if the size is less than 1MB OR if the
        // [curl][body_as_string] request value is set.
        if ($size !== null && $size < 1000000 || !empty($options['_body_as_string'])) {
            $conf[\CURLOPT_POSTFIELDS] = (string) $request->getBody();
            // Don't duplicate the Content-Length header
            $this->removeHeader('Content-Length', $conf);
            $this->removeHeader('Transfer-Encoding', $conf);
        } else {
            $conf[\CURLOPT_UPLOAD] = \true;
            if ($size !== null) {
                $conf[\CURLOPT_INFILESIZE] = $size;
                $this->removeHeader('Content-Length', $conf);
            }
            $body = $request->getBody();
            if ($body->isSeekable()) {
                $body->rewind();
            }
            $conf[\CURLOPT_READFUNCTION] = function ($ch, $fd, $length) use($body) {
                return $body->read($length);
            };
        }
        // If the Expect header is not present, prevent curl from adding it
        if (!$request->hasHeader('Expect')) {
            $conf[\CURLOPT_HTTPHEADER][] = 'Expect:';
        }
        // cURL sometimes adds a content-type by default. Prevent this.
        if (!$request->hasHeader('Content-Type')) {
            $conf[\CURLOPT_HTTPHEADER][] = 'Content-Type:';
        }
    }
    private function applyHeaders(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, array &$conf)
    {
        foreach ($conf['_headers'] as $name => $values) {
            foreach ($values as $value) {
                $value = (string) $value;
                if ($value === '') {
                    // cURL requires a special format for empty headers.
                    // See https://github.com/guzzle/guzzle/issues/1882 for more details.
                    $conf[\CURLOPT_HTTPHEADER][] = "{$name};";
                } else {
                    $conf[\CURLOPT_HTTPHEADER][] = "{$name}: {$value}";
                }
            }
        }
        // Remove the Accept header if one was not set
        if (!$easy->request->hasHeader('Accept')) {
            $conf[\CURLOPT_HTTPHEADER][] = 'Accept:';
        }
    }
    /**
     * Remove a header from the options array.
     *
     * @param string $name    Case-insensitive header to remove
     * @param array  $options Array of options to modify
     */
    private function removeHeader($name, array &$options)
    {
        foreach (\array_keys($options['_headers']) as $key) {
            if (!\strcasecmp($key, $name)) {
                unset($options['_headers'][$key]);
                return;
            }
        }
    }
    private function applyHandlerOptions(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, array &$conf)
    {
        $options = $easy->options;
        if (isset($options['verify'])) {
            if ($options['verify'] === \false) {
                unset($conf[\CURLOPT_CAINFO]);
                $conf[\CURLOPT_SSL_VERIFYHOST] = 0;
                $conf[\CURLOPT_SSL_VERIFYPEER] = \false;
            } else {
                $conf[\CURLOPT_SSL_VERIFYHOST] = 2;
                $conf[\CURLOPT_SSL_VERIFYPEER] = \true;
                if (\is_string($options['verify'])) {
                    // Throw an error if the file/folder/link path is not valid or doesn't exist.
                    if (!\file_exists($options['verify'])) {
                        throw new \InvalidArgumentException("SSL CA bundle not found: {$options['verify']}");
                    }
                    // If it's a directory or a link to a directory use CURLOPT_CAPATH.
                    // If not, it's probably a file, or a link to a file, so use CURLOPT_CAINFO.
                    if (\is_dir($options['verify']) || \is_link($options['verify']) && \is_dir(\readlink($options['verify']))) {
                        $conf[\CURLOPT_CAPATH] = $options['verify'];
                    } else {
                        $conf[\CURLOPT_CAINFO] = $options['verify'];
                    }
                }
            }
        }
        if (!empty($options['decode_content'])) {
            $accept = $easy->request->getHeaderLine('Accept-Encoding');
            if ($accept) {
                $conf[\CURLOPT_ENCODING] = $accept;
            } else {
                $conf[\CURLOPT_ENCODING] = '';
                // Don't let curl send the header over the wire
                $conf[\CURLOPT_HTTPHEADER][] = 'Accept-Encoding:';
            }
        }
        if (isset($options['sink'])) {
            $sink = $options['sink'];
            if (!\is_string($sink)) {
                $sink = \YoastSEO_Vendor\GuzzleHttp\Psr7\stream_for($sink);
            } elseif (!\is_dir(\dirname($sink))) {
                // Ensure that the directory exists before failing in curl.
                throw new \RuntimeException(\sprintf('Directory %s does not exist for sink value of %s', \dirname($sink), $sink));
            } else {
                $sink = new \YoastSEO_Vendor\GuzzleHttp\Psr7\LazyOpenStream($sink, 'w+');
            }
            $easy->sink = $sink;
            $conf[\CURLOPT_WRITEFUNCTION] = function ($ch, $write) use($sink) {
                return $sink->write($write);
            };
        } else {
            // Use a default temp stream if no sink was set.
            $conf[\CURLOPT_FILE] = \fopen('php://temp', 'w+');
            $easy->sink = \YoastSEO_Vendor\GuzzleHttp\Psr7\stream_for($conf[\CURLOPT_FILE]);
        }
        $timeoutRequiresNoSignal = \false;
        if (isset($options['timeout'])) {
            $timeoutRequiresNoSignal |= $options['timeout'] < 1;
            $conf[\CURLOPT_TIMEOUT_MS] = $options['timeout'] * 1000;
        }
        // CURL default value is CURL_IPRESOLVE_WHATEVER
        if (isset($options['force_ip_resolve'])) {
            if ('v4' === $options['force_ip_resolve']) {
                $conf[\CURLOPT_IPRESOLVE] = \CURL_IPRESOLVE_V4;
            } elseif ('v6' === $options['force_ip_resolve']) {
                $conf[\CURLOPT_IPRESOLVE] = \CURL_IPRESOLVE_V6;
            }
        }
        if (isset($options['connect_timeout'])) {
            $timeoutRequiresNoSignal |= $options['connect_timeout'] < 1;
            $conf[\CURLOPT_CONNECTTIMEOUT_MS] = $options['connect_timeout'] * 1000;
        }
        if ($timeoutRequiresNoSignal && \strtoupper(\substr(\PHP_OS, 0, 3)) !== 'WIN') {
            $conf[\CURLOPT_NOSIGNAL] = \true;
        }
        if (isset($options['proxy'])) {
            if (!\is_array($options['proxy'])) {
                $conf[\CURLOPT_PROXY] = $options['proxy'];
            } else {
                $scheme = $easy->request->getUri()->getScheme();
                if (isset($options['proxy'][$scheme])) {
                    $host = $easy->request->getUri()->getHost();
                    if (!isset($options['proxy']['no']) || !\YoastSEO_Vendor\GuzzleHttp\is_host_in_noproxy($host, $options['proxy']['no'])) {
                        $conf[\CURLOPT_PROXY] = $options['proxy'][$scheme];
                    }
                }
            }
        }
        if (isset($options['cert'])) {
            $cert = $options['cert'];
            if (\is_array($cert)) {
                $conf[\CURLOPT_SSLCERTPASSWD] = $cert[1];
                $cert = $cert[0];
            }
            if (!\file_exists($cert)) {
                throw new \InvalidArgumentException("SSL certificate not found: {$cert}");
            }
            $conf[\CURLOPT_SSLCERT] = $cert;
        }
        if (isset($options['ssl_key'])) {
            if (\is_array($options['ssl_key'])) {
                if (\count($options['ssl_key']) === 2) {
                    list($sslKey, $conf[\CURLOPT_SSLKEYPASSWD]) = $options['ssl_key'];
                } else {
                    list($sslKey) = $options['ssl_key'];
                }
            }
            $sslKey = isset($sslKey) ? $sslKey : $options['ssl_key'];
            if (!\file_exists($sslKey)) {
                throw new \InvalidArgumentException("SSL private key not found: {$sslKey}");
            }
            $conf[\CURLOPT_SSLKEY] = $sslKey;
        }
        if (isset($options['progress'])) {
            $progress = $options['progress'];
            if (!\is_callable($progress)) {
                throw new \InvalidArgumentException('progress client option must be callable');
            }
            $conf[\CURLOPT_NOPROGRESS] = \false;
            $conf[\CURLOPT_PROGRESSFUNCTION] = function () use($progress) {
                $args = \func_get_args();
                // PHP 5.5 pushed the handle onto the start of the args
                if (\is_resource($args[0])) {
                    \array_shift($args);
                }
                \call_user_func_array($progress, $args);
            };
        }
        if (!empty($options['debug'])) {
            $conf[\CURLOPT_STDERR] = \YoastSEO_Vendor\GuzzleHttp\debug_resource($options['debug']);
            $conf[\CURLOPT_VERBOSE] = \true;
        }
    }
    /**
     * This function ensures that a response was set on a transaction. If one
     * was not set, then the request is retried if possible. This error
     * typically means you are sending a payload, curl encountered a
     * "Connection died, retrying a fresh connect" error, tried to rewind the
     * stream, and then encountered a "necessary data rewind wasn't possible"
     * error, causing the request to be sent through curl_multi_info_read()
     * without an error status.
     */
    private static function retryFailedRewind(callable $handler, \YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy, array $ctx)
    {
        try {
            // Only rewind if the body has been read from.
            $body = $easy->request->getBody();
            if ($body->tell() > 0) {
                $body->rewind();
            }
        } catch (\RuntimeException $e) {
            $ctx['error'] = 'The connection unexpectedly failed without ' . 'providing an error. The request would have been retried, ' . 'but attempting to rewind the request body failed. ' . 'Exception: ' . $e;
            return self::createRejection($easy, $ctx);
        }
        // Retry no more than 3 times before giving up.
        if (!isset($easy->options['_curl_retries'])) {
            $easy->options['_curl_retries'] = 1;
        } elseif ($easy->options['_curl_retries'] == 2) {
            $ctx['error'] = 'The cURL request was retried 3 times ' . 'and did not succeed. The most likely reason for the failure ' . 'is that cURL was unable to rewind the body of the request ' . 'and subsequent retries resulted in the same error. Turn on ' . 'the debug option to see what went wrong. See ' . 'https://bugs.php.net/bug.php?id=47204 for more information.';
            return self::createRejection($easy, $ctx);
        } else {
            $easy->options['_curl_retries']++;
        }
        return $handler($easy->request, $easy->options);
    }
    private function createHeaderFn(\YoastSEO_Vendor\GuzzleHttp\Handler\EasyHandle $easy)
    {
        if (isset($easy->options['on_headers'])) {
            $onHeaders = $easy->options['on_headers'];
            if (!\is_callable($onHeaders)) {
                throw new \InvalidArgumentException('on_headers must be callable');
            }
        } else {
            $onHeaders = null;
        }
        return function ($ch, $h) use($onHeaders, $easy, &$startingResponse) {
            $value = \trim($h);
            if ($value === '') {
                $startingResponse = \true;
                $easy->createResponse();
                if ($onHeaders !== null) {
                    try {
                        $onHeaders($easy->response);
                    } catch (\Exception $e) {
                        // Associate the exception with the handle and trigger
                        // a curl header write error by returning 0.
                        $easy->onHeadersException = $e;
                        return -1;
                    }
                }
            } elseif ($startingResponse) {
                $startingResponse = \false;
                $easy->headers = [$value];
            } else {
                $easy->headers[] = $value;
            }
            return \strlen($h);
        };
    }
}
