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<?php |
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/** |
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* HTTP Client |
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* User: moyo |
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* Date: 23/08/2017 |
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* Time: 10:52 PM |
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*/ |
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namespace Carno\HTTP; |
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use function Carno\Coroutine\async; |
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use Carno\DNS\DNS; |
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use Carno\DNS\Result; |
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use Carno\HTTP\Client\Methods; |
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use Carno\HTTP\Contracts\Client as API; |
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use Carno\HTTP\Exception\ClientBindingException; |
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use Carno\HTTP\Powered\Swoole\Client as SWClient; |
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use Carno\Net\Address; |
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use Carno\Pool\Pool; |
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use Carno\Pool\Wrapper\SAR; |
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use Carno\Promise\Promise; |
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use Carno\Promise\Promised; |
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use Psr\Http\Message\RequestInterface as Request; |
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use Psr\Http\Message\UriInterface as Uri; |
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use Closure; |
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class Client implements API |
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{ |
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use SAR, Methods; |
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/** |
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* @var Options |
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*/ |
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private $options = null; |
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/** |
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* @var SWClient |
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*/ |
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private $session = null; |
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/** |
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* @var Address |
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*/ |
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private $restrict = null; |
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/** |
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* @var Promised |
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*/ |
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private $closed = null; |
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/** |
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* @var Pool |
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*/ |
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private $pool = null; |
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/** |
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* @var Result[] |
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*/ |
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private $dns = []; |
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/** |
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* @var Promised |
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*/ |
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private $ka = null; |
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/** |
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* Client constructor. |
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* @param Options $options |
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* @param Address $limited |
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*/ |
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public function __construct(Options $options, Address $limited = null) |
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{ |
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$this->options = $options; |
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$this->restrict = $limited; |
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} |
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/** |
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* @return Address|null |
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*/ |
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public function restricted() : ?Address |
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{ |
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return $this->restrict; |
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} |
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/** |
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* @param Request $request |
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* @param Promised|null $canceller |
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* @return Promised |
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*/ |
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public function perform(Request $request, Promised $canceller = null) : Promised |
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{ |
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if ($this->options->pooled()) { |
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return async(function () use ($request, $canceller) { |
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if ($canceller) { |
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$interrupt = Promise::deferred(); |
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$canceller->then(static function () use ($interrupt) { |
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$interrupt->then(static function (SWClient $client) { |
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return $client->close(); |
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}); |
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$interrupt->resolve(); |
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}); |
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} |
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return yield $this->sarRun( |
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$this->pool($this->remote($request->getUri())), |
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'execute', |
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[$request, $this->options], |
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$interrupt ?? null |
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); |
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}); |
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} |
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return async(function () use ($request, $canceller) { |
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/** |
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* @var SWClient $client |
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*/ |
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$this->session = $client = yield $this->http($this->remote($request->getUri()), false); |
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$canceller && $canceller->then(static function () use ($client) { |
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return $client->close(); |
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}); |
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return yield $client->execute($request, $this->options); |
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}); |
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} |
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/** |
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* close pool connections or session client |
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* @return Promised |
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*/ |
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public function close() : Promised |
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{ |
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return |
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($this->pool |
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? $this->pool->shutdown() |
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: ( |
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$this->session |
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? $this->session->close() |
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: Promise::resolved() |
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) |
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)->sync($this->closed()) |
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; |
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} |
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/** |
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* @return Promised |
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*/ |
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public function closed() : Promised |
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{ |
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return $this->closed ?? $this->closed = Promise::deferred(); |
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} |
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/** |
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* @param Closure $initialize |
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*/ |
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public function keepalived(Closure $initialize) : void |
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{ |
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($this->ka ?? $this->ka = Promise::deferred())->then(function () use ($initialize) { |
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$initialize($this->pool); |
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}); |
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} |
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/** |
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* @param Address $remote |
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* @return Pool |
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*/ |
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private function pool(Address $remote) : Pool |
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{ |
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if ($this->pool) { |
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return $this->pool; |
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} |
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$this->pool = new Pool($this->options->pooling(), function () use ($remote) { |
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return $this->http($remote, true); |
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}, $this->options->identify()); |
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$this->pool->closed()->then(function () { |
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$this->pool = null; |
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}); |
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$this->ka && $this->ka->resolve(); |
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return $this->pool; |
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} |
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/** |
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* @param Address $remote |
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* @param bool $pooled |
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* @return SWClient |
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*/ |
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private function http(Address $remote, bool $pooled) |
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{ |
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$host = $remote->host(); |
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$port = $remote->port(); |
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if ($this->restrict && ($this->restrict->host() !== $host || $this->restrict->port() !== $port)) { |
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throw new ClientBindingException( |
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sprintf( |
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'Expected "%s:%d" got "%s:%d"', |
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$this->restrict->host(), |
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$this->restrict->port(), |
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$host, |
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$port |
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) |
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); |
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} |
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$this->restrict = $remote; |
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$dns = $this->dns[$host] ?? $this->dns[$host] = yield DNS::resolve($host, $this->options->ttLookup); |
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return new SWClient(new Address($dns->random(), $port), $pooled); |
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} |
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/** |
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* @param Uri $uri |
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* @return Address |
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*/ |
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private function remote(Uri $uri) : Address |
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{ |
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return $this->restrict ?? new Address($uri->getHost(), $uri->getPort()); |
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} |
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} |
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