[HttpClient] Add portable HTTP/2 implementation based on Amp's HTTP c…

…lient

composer.json

@@ -99,6 +99,8 @@
         "symfony/yaml": "self.version"
     },
     "require-dev": {
+        "amphp/http-client": "^4.0",
+        "amphp/http-tunnel": "^1.0",
         "cache/integration-tests": "dev-master",
         "doctrine/annotations": "~1.0",
         "doctrine/cache": "~1.6",

src/Symfony/Component/HttpClient/AmpHttpClient.php

@@ -0,0 +1,155 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpClient;
+
+use Amp\Http\Client\DelegateHttpClient;
+use Amp\Http\Client\Request;
+use Amp\Http\Tunnel\Http1TunnelConnector;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerAwareTrait;
+use Symfony\Component\HttpClient\Exception\TransportException;
+use Symfony\Component\HttpClient\Internal\AmpClientState;
+use Symfony\Component\HttpClient\Response\AmpResponse;
+use Symfony\Component\HttpClient\Response\ResponseStream;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+use Symfony\Contracts\HttpClient\ResponseStreamInterface;
+use Symfony\Contracts\Service\ResetInterface;
+
+if (!interface_exists(DelegateHttpClient::class)) {
+    throw new \LogicException('You cannot use "Symfony\Component\HttpClient\AmpHttpClient" as the "amphp/http-client" package is not installed. Try running "composer require amphp/http-client".');
+}
+
+/**
+ * A portable implementation of the HttpClientInterface contracts based on Amp's HTTP client.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+final class AmpHttpClient implements HttpClientInterface, LoggerAwareInterface, ResetInterface
+{
+    use HttpClientTrait;
+    use LoggerAwareTrait;
+
+    private $defaultOptions = self::OPTIONS_DEFAULTS;
+
+    /** @var AmpClientState */
+    private $multi;
+
+    /**
+     * @param array $defaultOptions     Default requests' options
+     * @param int   $maxHostConnections The maximum number of connections to open
+     *
+     * @see HttpClientInterface::OPTIONS_DEFAULTS for available options
+     */
+    public function __construct(array $defaultOptions = [], callable $clientConfigurator = null, int $maxHostConnections = 6, int $maxPendingPushes = 50)
+    {
+        $this->defaultOptions['buffer'] = $this->defaultOptions['buffer'] ?? \Closure::fromCallable([__CLASS__, 'shouldBuffer']);
+
+        if ($defaultOptions) {
+            [, $this->defaultOptions] = self::prepareRequest(null, null, $defaultOptions, $this->defaultOptions);
+        }
+
+        $this->multi = new AmpClientState($clientConfigurator, $maxHostConnections, $maxPendingPushes, $this->logger);
+    }
+
+    /**
+     * @see HttpClientInterface::OPTIONS_DEFAULTS for available options
+     *
+     * {@inheritdoc}
+     */
+    public function request(string $method, string $url, array $options = []): ResponseInterface
+    {
+        [$url, $options] = self::prepareRequest($method, $url, $options, $this->defaultOptions);
+
+        $options['proxy'] = self::getProxy($options['proxy'], $url, $options['no_proxy']);
+
+        if (null !== $options['proxy'] && !class_exists(Http1TunnelConnector::class)) {
+            throw new \LogicException('You cannot use the "proxy" option as the "amphp/http-tunnel" package is not installed. Try running "composer require amphp/http-tunnel".');
+        }
+
+        if ('' !== $options['body'] && 'POST' === $method && !isset($options['normalized_headers']['content-type'])) {
+            $options['headers'][] = 'Content-Type: application/x-www-form-urlencoded';
+        }
+
+        if (!isset($options['normalized_headers']['user-agent'])) {
+            $options['headers'][] = 'User-Agent: Symfony HttpClient/Amp';
+        }
+
+        if (0 < $options['max_duration']) {
+            $options['timeout'] = min($options['max_duration'], $options['timeout']);
+        }
+
+        if ($options['resolve']) {
+            $this->multi->dnsCache = $options['resolve'] + $this->multi->dnsCache;
+        }
+
+        if ($options['peer_fingerprint'] && !isset($options['peer_fingerprint']['pin-sha256'])) {
+            throw new TransportException(__CLASS__.' supports only "pin-sha256" fingerprints.');
+        }
+
+        $request = new Request(implode('', $url), $method);
+
+        if ($options['http_version']) {
+            switch ((float) $options['http_version']) {
+                case 1.0: $request->setProtocolVersions(['1.0']); break;
+                case 1.1: $request->setProtocolVersions(['1.1', '1.0']); break;
+                default: $request->setProtocolVersions(['2', '1.1', '1.0']); break;
+            }
+        }
+
+        foreach ($options['headers'] as $v) {
+            $h = explode(': ', $v, 2);
+            $request->addHeader($h[0], $h[1]);
+        }
+
+        $request->setTcpConnectTimeout(1000 * $options['timeout']);
+        $request->setTlsHandshakeTimeout(1000 * $options['timeout']);
+        $request->setTransferTimeout(1000 * $options['max_duration']);
+
+        if ('' !== $request->getUri()->getUserInfo() && !$request->hasHeader('authorization')) {
+            $auth = explode(':', $request->getUri()->getUserInfo(), 2);
+            $auth = array_map('rawurldecode', $auth) + [1 => ''];
+            $request->setHeader('Authorization', 'Basic '.base64_encode(implode(':', $auth)));
+        }
+
+        return new AmpResponse($this->multi, $request, $options, $this->logger);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function stream($responses, float $timeout = null): ResponseStreamInterface
+    {
+        if ($responses instanceof AmpResponse) {
+            $responses = [$responses];
+        } elseif (!is_iterable($responses)) {
+            throw new \TypeError(sprintf('%s() expects parameter 1 to be an iterable of AmpResponse objects, %s given.', __METHOD__, \is_object($responses) ? \get_class($responses) : \gettype($responses)));
+        }
+
+        return new ResponseStream(AmpResponse::stream($responses, $timeout));
+    }
+
+    public function reset()
+    {
+        $this->multi->dnsCache = [];
+
+        if ($this->logger) {
+            foreach ($this->multi->pushedResponses as $authority => $pushedResponses) {
+                foreach ($pushedResponses as [$pushedUrl]) {
+                    $this->logger->debug(sprintf('Unused pushed response: "%s"', $pushedUrl));
+                }
+            }
+        }
+
+        $this->multi->pushedResponses = [];
+    }
+}

src/Symfony/Component/HttpClient/CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.1.0
+-----
+
+ * added `AmpHttpClient`, a portable HTTP/2 implementation based on Amp
+
 4.4.0
 -----
 

src/Symfony/Component/HttpClient/HttpClientTrait.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\HttpClient;
 
 use Symfony\Component\HttpClient\Exception\InvalidArgumentException;
+use Symfony\Component\HttpClient\Exception\TransportException;
 
 /**
  * Provides the common logic from writing HttpClientInterface implementations.
@@ -541,6 +542,48 @@ private static function mergeQueryString(?string $queryString, array $queryArray
         return implode('&', $replace ? array_replace($query, $queryArray) : ($query + $queryArray));
     }
 
+    /**
+     * Loads proxy configuration from the same environment variables as curl when no proxy is explicitly set.
+     */
+    private static function getProxy(?string $proxy, array $url, ?string $noProxy): ?array
+    {
+        if (null === $proxy) {
+            // Ignore HTTP_PROXY except on the CLI to work around httpoxy set of vulnerabilities
+            $proxy = $_SERVER['http_proxy'] ?? (\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) ? $_SERVER['HTTP_PROXY'] ?? null : null) ?? $_SERVER['all_proxy'] ?? $_SERVER['ALL_PROXY'] ?? null;
+
+            if ('https:' === $url['scheme']) {
+                $proxy = $_SERVER['https_proxy'] ?? $_SERVER['HTTPS_PROXY'] ?? $proxy;
+            }
+        }
+
+        if (null === $proxy) {
+            return null;
+        }
+
+        $proxy = (parse_url($proxy) ?: []) + ['scheme' => 'http'];
+
+        if (!isset($proxy['host'])) {
+            throw new TransportException('Invalid HTTP proxy: host is missing.');
+        }
+
+        if ('http' === $proxy['scheme']) {
+            $proxyUrl = 'tcp://'.$proxy['host'].':'.($proxy['port'] ?? '80');
+        } elseif ('https' === $proxy['scheme']) {
+            $proxyUrl = 'ssl://'.$proxy['host'].':'.($proxy['port'] ?? '443');
+        } else {
+            throw new TransportException(sprintf('Unsupported proxy scheme "%s": "http" or "https" expected.', $proxy['scheme']));
+        }
+
+        $noProxy = $noProxy ?? $_SERVER['no_proxy'] ?? $_SERVER['NO_PROXY'] ?? '';
+        $noProxy = $noProxy ? preg_split('/[\s,]+/', $noProxy) : [];
+
+        return [
+            'url' => $proxyUrl,
+            'auth' => isset($proxy['user']) ? 'Basic '.base64_encode(rawurldecode($proxy['user']).':'.rawurldecode($proxy['pass'] ?? '')) : null,
+            'no_proxy' => $noProxy,
+        ];
+    }
+
     private static function shouldBuffer(array $headers): bool
     {
         if (null === $contentType = $headers['content-type'][0] ?? null) {

src/Symfony/Component/HttpClient/Internal/AmpBody.php

@@ -0,0 +1,129 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpClient\Internal;
+
+use Amp\ByteStream\InputStream;
+use Amp\ByteStream\ResourceInputStream;
+use Amp\Http\Client\RequestBody;
+use Amp\Promise;
+use Amp\Success;
+use Symfony\Component\HttpClient\Exception\TransportException;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class AmpBody implements RequestBody, InputStream
+{
+    private $body;
+    private $onProgress;
+    private $offset = 0;
+    private $length = -1;
+    private $uploaded = 0;
+
+    public function __construct($body, &$info, \closure $onProgress)
+    {
+        $this->body = $body;
+        $this->info = &$info;
+        $this->onProgress = $onProgress;
+
+        if (\is_resource($body)) {
+            $this->offset = ftell($body);
+            $this->length = fstat($body)['size'];
+            $this->body = new ResourceInputStream($body);
+        } elseif (\is_string($body)) {
+            $this->length = \strlen($body);
+        }
+    }
+
+    public function createBodyStream(): InputStream
+    {
+        return $this;
+    }
+
+    public function getHeaders(): Promise
+    {
+        return new Success([]);
+    }
+
+    public function getBodyLength(): Promise
+    {
+        return new Success($this->length - $this->offset);
+    }
+
+    public function read(): Promise
+    {
+        $this->info['size_upload'] += $this->uploaded;
+        $this->uploaded = 0;
+        ($this->onProgress)();
+
+        $chunk = $this->doRead();
+        $chunk->onResolve(function ($e, $data) {
+            if (null !== $data) {
+                $this->uploaded = \strlen($data);
+            } else {
+                $this->info['upload_content_length'] = $this->info['size_upload'];
+            }
+        });
+
+        return $chunk;
+    }
+
+    public static function rewind(RequestBody $body): RequestBody
+    {
+        if (!$body instanceof self) {
+            return $body;
+        }
+
+        if ($body->body instanceof ResourceInputStream) {
+            fseek($body->body->getResource(), $body->offset);
+
+            return new $body($body->body, $body->info, $body->onProgress);
+        }
+
+        if (\is_string($body->body)) {
+            $body->offset = 0;
+        }
+
+        return $body;
+    }
+
+    private function doRead(): Promise
+    {
+        if ($this->body instanceof ResourceInputStream) {
+            return $this->body->read();
+        }
+
+        if (null === $this->offset || !$this->length) {
+            return new Success();
+        }
+
+        if (\is_string($this->body)) {
+            $this->offset = null;
+
+            return new Success($this->body);
+        }
+
+        if ('' === $data = ($this->body)(16372)) {
+            $this->offset = null;
+
+            return new Success();
+        }
+
+        if (!\is_string($data)) {
+            throw new TransportException(sprintf('Return value of the "body" option callback must be string, %s returned.', \gettype($data)));
+        }
+
+        return new Success($data);
+    }
+}