<?php

namespace GuzzleHttp\Handler;

use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\FulfilledPromise;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Psr7\LazyOpenStream;
use GuzzleHttp\TransferStats;
use GuzzleHttp\Utils;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\UriInterface;

/**
 * Creates curl resources from a request
 *
 * @final
 */
class CurlFactory implements CurlFactoryInterface
{
    public const CURL_VERSION_STR = 'curl_version';

    /**
     * @deprecated
     */
    public const LOW_CURL_VERSION_NUMBER = '7.21.2';

    /**
     * @var resource[]|\CurlHandle[]
     */
    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(int $maxHandles)
    {
        $this->maxHandles = $maxHandles;
    }

    public function create(RequestInterface $request, array $options): EasyHandle
    {
        $protocolVersion = $request->getProtocolVersion();

        if ('2' === $protocolVersion || '2.0' === $protocolVersion) {
            if (!self::supportsHttp2()) {
                throw new ConnectException('HTTP/2 is supported by the cURL handler, however libcurl is built without HTTP/2 support.', $request);
            }
        } elseif ('1.0' !== $protocolVersion && '1.1' !== $protocolVersion) {
            throw new ConnectException(sprintf('HTTP/%s is not supported by the cURL handler.', $protocolVersion), $request);
        }

        if (isset($options['curl']['body_as_string'])) {
            $options['_body_as_string'] = $options['curl']['body_as_string'];
            unset($options['curl']['body_as_string']);
        }

        $easy = new 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;
    }

    private static function supportsHttp2(): bool
    {
        static $supportsHttp2 = null;

        if (null === $supportsHttp2) {
            $supportsHttp2 = self::supportsTls12()
                && defined('CURL_VERSION_HTTP2')
                && (\CURL_VERSION_HTTP2 & \curl_version()['features']);
        }

        return $supportsHttp2;
    }

    private static function supportsTls12(): bool
    {
        static $supportsTls12 = null;

        if (null === $supportsTls12) {
            $supportsTls12 = \CURL_SSLVERSION_TLSv1_2 & \curl_version()['features'];
        }

        return $supportsTls12;
    }

    private static function supportsTls13(): bool
    {
        static $supportsTls13 = null;

        if (null === $supportsTls13) {
            $supportsTls13 = defined('CURL_SSLVERSION_TLSv1_3')
                && (\CURL_SSLVERSION_TLSv1_3 & \curl_version()['features']);
        }

        return $supportsTls13;
    }

    public function release(EasyHandle $easy): void
    {
        $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(RequestInterface, array): PromiseInterface $handler
     * @param CurlFactoryInterface                                $factory Dictates how the handle is released
     */
    public static function finish(callable $handler, EasyHandle $easy, CurlFactoryInterface $factory): PromiseInterface
    {
        if (isset($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 FulfilledPromise($easy->response);
    }

    private static function invokeStats(EasyHandle $easy): void
    {
        $curlStats = \curl_getinfo($easy->handle);
        $curlStats['appconnect_time'] = \curl_getinfo($easy->handle, \CURLINFO_APPCONNECT_TIME);
        $stats = new TransferStats(
            $easy->request,
            $easy->response,
            $curlStats['total_time'],
            $easy->errno,
            $curlStats
        );
        ($easy->options['on_stats'])($stats);
    }

    /**
     * @param callable(RequestInterface, array): PromiseInterface $handler
     */
    private static function finishError(callable $handler, EasyHandle $easy, CurlFactoryInterface $factory): PromiseInterface
    {
        // 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] = self::getCurlVersion();
        $factory->release($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 getCurlVersion(): string
    {
        static $curlVersion = null;

        if (null === $curlVersion) {
            $curlVersion = \curl_version()['version'];
        }

        return $curlVersion;
    }

    private static function createRejection(EasyHandle $easy, array $ctx): PromiseInterface
    {
        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 ($easy->createResponseException) {
            return P\Create::rejectionFor(
                new RequestException(
                    'An error was encountered while creating the response',
                    $easy->request,
                    $easy->response,
                    $easy->createResponseException,
                    $ctx
                )
            );
        }

        // If an exception was encountered during the onHeaders event, then
        // return a rejected promise that wraps that exception.
        if ($easy->onHeadersException) {
            return P\Create::rejectionFor(
                new RequestException(
                    'An error was encountered during the on_headers event',
                    $easy->request,
                    $easy->response,
                    $easy->onHeadersException,
                    $ctx
                )
            );
        }

        $uri = $easy->request->getUri();

        $sanitizedError = self::sanitizeCurlError($ctx['error'] ?? '', $uri);

        $message = \sprintf(
            'cURL error %s: %s (%s)',
            $ctx['errno'],
            $sanitizedError,
            'see https://curl.haxx.se/libcurl/c/libcurl-errors.html'
        );

        if ('' !== $sanitizedError) {
            $redactedUriString = \GuzzleHttp\Psr7\Utils::redactUserInfo($uri)->__toString();
            if ($redactedUriString !== '' && false === \strpos($sanitizedError, $redactedUriString)) {
                $message .= \sprintf(' for %s', $redactedUriString);
            }
        }

        // Create a connection exception if it was a specific error code.
        $error = isset($connectionErrors[$easy->errno])
            ? new ConnectException($message, $easy->request, null, $ctx)
            : new RequestException($message, $easy->request, $easy->response, null, $ctx);

        return P\Create::rejectionFor($error);
    }

    private static function sanitizeCurlError(string $error, UriInterface $uri): string
    {
        if ('' === $error) {
            return $error;
        }

        $baseUri = $uri->withQuery('')->withFragment('');
        $baseUriString = $baseUri->__toString();

        if ('' === $baseUriString) {
            return $error;
        }

        $redactedUriString = \GuzzleHttp\Psr7\Utils::redactUserInfo($baseUri)->__toString();

        return str_replace($baseUriString, $redactedUriString, $error);
    }

    /**
     * @return array<int|string, mixed>
     */
    private function getDefaultConf(EasyHandle $easy): array
    {
        $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 => 300,
        ];

        if (\defined('CURLOPT_PROTOCOLS')) {
            $conf[\CURLOPT_PROTOCOLS] = \CURLPROTO_HTTP | \CURLPROTO_HTTPS;
        }

        $version = $easy->request->getProtocolVersion();

        if ('2' === $version || '2.0' === $version) {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_2_0;
        } elseif ('1.1' === $version) {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_1_1;
        } else {
            $conf[\CURLOPT_HTTP_VERSION] = \CURL_HTTP_VERSION_1_0;
        }

        return $conf;
    }

    private function applyMethod(EasyHandle $easy, array &$conf): void
    {
        $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' || $method === 'POST') {
            // See https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.2
            if (!$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(RequestInterface $request, array $options, array &$conf): void
    {
        $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();
            }
            $conf[\CURLOPT_READFUNCTION] = static function ($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(EasyHandle $easy, array &$conf): void
    {
        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(string $name, array &$options): void
    {
        foreach (\array_keys($options['_headers']) as $key) {
            if (!\strcasecmp($key, $name)) {
                unset($options['_headers'][$key]);

                return;
            }
        }
    }

    private function applyHandlerOptions(EasyHandle $easy, array &$conf): void
    {
        $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']) === true
                            && ($verifyLink = \readlink($options['verify'])) !== false
                            && \is_dir($verifyLink)
                        )
                    ) {
                        $conf[\CURLOPT_CAPATH] = $options['verify'];
                    } else {
                        $conf[\CURLOPT_CAINFO] = $options['verify'];
                    }
                }
            }
        }

        if (!isset($options['curl'][\CURLOPT_ENCODING]) && !empty($options['decode_content'])) {
            $accept = $easy->request->getHeaderLine('Accept-Encoding');
            if ($accept) {
                $conf[\CURLOPT_ENCODING] = $accept;
            } else {
                // The empty string enables all available decoders and implicitly
                // sets a matching 'Accept-Encoding' header.
                $conf[\CURLOPT_ENCODING] = '';
                // But as the user did not specify any encoding preference,
                // let's leave it up to server by preventing curl from sending
                // the header, which will be interpreted as 'Accept-Encoding: *'.
                // https://www.rfc-editor.org/rfc/rfc9110#field.accept-encoding
                $conf[\CURLOPT_HTTPHEADER][] = 'Accept-Encoding:';
            }
        }

        if (!isset($options['sink'])) {
            // Use a default temp stream if no sink was set.
            $options['sink'] = \GuzzleHttp\Psr7\Utils::tryFopen('php://temp', 'w+');
        }
        $sink = $options['sink'];
        if (!\is_string($sink)) {
            $sink = \GuzzleHttp\Psr7\Utils::streamFor($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 {
            $sink = new LazyOpenStream($sink, 'w+');
        }
        $easy->sink = $sink;
        $conf[\CURLOPT_WRITEFUNCTION] = static function ($ch, $write) use ($sink): int {
            return $sink->write($write);
        };

        $timeoutRequiresNoSignal = false;
        if (isset($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']) && Utils::isHostInNoProxy($host, $options['proxy']['no'])) {
                        unset($conf[\CURLOPT_PROXY]);
                    } else {
                        $conf[\CURLOPT_PROXY] = $options['proxy'][$scheme];
                    }
                }
            }
        }

        if (isset($options['crypto_method'])) {
            $protocolVersion = $easy->request->getProtocolVersion();

            // If HTTP/2, upgrade TLS 1.0 and 1.1 to 1.2
            if ('2' === $protocolVersion || '2.0' === $protocolVersion) {
                if (
                    \STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT === $options['crypto_method']
                    || \STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT === $options['crypto_method']
                    || \STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT === $options['crypto_method']
                ) {
                    $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_2;
                } elseif (defined('STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT') && \STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT === $options['crypto_method']) {
                    if (!self::supportsTls13()) {
                        throw new \InvalidArgumentException('Invalid crypto_method request option: TLS 1.3 not supported by your version of cURL');
                    }
                    $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_3;
                } else {
                    throw new \InvalidArgumentException('Invalid crypto_method request option: unknown version provided');
                }
            } elseif (\STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT === $options['crypto_method']) {
                $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_0;
            } elseif (\STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT === $options['crypto_method']) {
                $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_1;
            } elseif (\STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT === $options['crypto_method']) {
                if (!self::supportsTls12()) {
                    throw new \InvalidArgumentException('Invalid crypto_method request option: TLS 1.2 not supported by your version of cURL');
                }
                $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_2;
            } elseif (defined('STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT') && \STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT === $options['crypto_method']) {
                if (!self::supportsTls13()) {
                    throw new \InvalidArgumentException('Invalid crypto_method request option: TLS 1.3 not supported by your version of cURL');
                }
                $conf[\CURLOPT_SSLVERSION] = \CURL_SSLVERSION_TLSv1_3;
            } else {
                throw new \InvalidArgumentException('Invalid crypto_method request option: unknown version provided');
            }
        }

        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}");
            }
            // OpenSSL (versions 0.9.3 and later) also support "P12" for PKCS#12-encoded files.
            // see https://curl.se/libcurl/c/CURLOPT_SSLCERTTYPE.html
            $ext = pathinfo($cert, \PATHINFO_EXTENSION);
            if (preg_match('#^(der|p12)$#i', $ext)) {
                $conf[\CURLOPT_SSLCERTTYPE] = strtoupper($ext);
            }
            $conf[\CURLOPT_SSLCERT] = $cert;
        }

        if (isset($options['ssl_key'])) {
            if (\is_array($options['ssl_key'])) {
                if (\count($options['ssl_key']) === 2) {
                    [$sslKey, $conf[\CURLOPT_SSLKEYPASSWD]] = $options['ssl_key'];
                } else {
                    [$sslKey] = $options['ssl_key'];
                }
            }

            $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;
            $conf[\CURLOPT_PROGRESSFUNCTION] = static function ($resource, int $downloadSize, int $downloaded, int $uploadSize, int $uploaded) use ($progress) {
                $progress($downloadSize, $downloaded, $uploadSize, $uploaded);
            };
        }

        if (!empty($options['debug'])) {
            $conf[\CURLOPT_STDERR] = Utils::debugResource($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.
     *
     * @param callable(RequestInterface, array): PromiseInterface $handler
     */
    private static function retryFailedRewind(callable $handler, EasyHandle $easy, array $ctx): PromiseInterface
    {
        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(EasyHandle $easy): callable
    {
        if (isset($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 static function ($ch, $h) use (
            $onHeaders,
            $easy,
            &$startingResponse
        ) {
            $value = \trim($h);
            if ($value === '') {
                $startingResponse = true;
                try {
                    $easy->createResponse();
                } catch (\Exception $e) {
                    $easy->createResponseException = $e;

                    return -1;
                }
                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);
        };
    }

    public function __destruct()
    {
        foreach ($this->handles as $id => $handle) {
            \curl_close($handle);
            unset($this->handles[$id]);
        }
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox