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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Common\Export\Http;
use function assert;
use BadMethodCallException;
use function explode;
use function in_array;
use OpenTelemetry\SDK\Common\Export\TransportInterface;
use OpenTelemetry\SDK\Common\Future\CancellationInterface;
use OpenTelemetry\SDK\Common\Future\CompletedFuture;
use OpenTelemetry\SDK\Common\Future\ErrorFuture;
use OpenTelemetry\SDK\Common\Future\FutureInterface;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Client\NetworkExceptionInterface;
use Psr\Http\Message\RequestFactoryInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamFactoryInterface;
use RuntimeException;
use function strtolower;
use Throwable;
use function time_nanosleep;
use function trim;
/**
* @psalm-template CONTENT_TYPE of string
* @template-implements TransportInterface<CONTENT_TYPE>
*/
final class PsrTransport implements TransportInterface
{
private ClientInterface $client;
private RequestFactoryInterface $requestFactory;
private StreamFactoryInterface $streamFactory;
private string $endpoint;
private string $contentType;
private array $headers;
private array $compression;
private int $retryDelay;
private int $maxRetries;
private bool $closed = false;
/**
* @psalm-param CONTENT_TYPE $contentType
*/
public function __construct(
ClientInterface $client,
RequestFactoryInterface $requestFactory,
StreamFactoryInterface $streamFactory,
string $endpoint,
string $contentType,
array $headers,
array $compression,
int $retryDelay,
int $maxRetries
) {
$this->client = $client;
$this->requestFactory = $requestFactory;
$this->streamFactory = $streamFactory;
$this->endpoint = $endpoint;
$this->contentType = $contentType;
$this->headers = $headers;
$this->compression = $compression;
$this->retryDelay = $retryDelay;
$this->maxRetries = $maxRetries;
}
public function contentType(): string
{
return $this->contentType;
}
public function send(string $payload, ?CancellationInterface $cancellation = null): FutureInterface
{
if ($this->closed) {
return new ErrorFuture(new BadMethodCallException('Transport closed'));
}
$body = PsrUtils::encode($payload, $this->compression, $appliedEncodings);
$request = $this->requestFactory
->createRequest('POST', $this->endpoint)
->withBody($this->streamFactory->createStream($body))
->withHeader('Content-Type', $this->contentType)
;
if ($appliedEncodings) {
$request = $request->withHeader('Content-Encoding', $appliedEncodings);
}
foreach ($this->headers as $header => $value) {
$request = $request->withAddedHeader($header, $value);
}
for ($retries = 0;; $retries++) {
$response = null;
$e = null;
try {
$response = $this->client->sendRequest($request);
if ($response->getStatusCode() >= 200 && $response->getStatusCode() < 300) {
break;
}
if ($response->getStatusCode() >= 400 && $response->getStatusCode() < 500 && !in_array($response->getStatusCode(), [408, 429], true)) {
throw new RuntimeException($response->getReasonPhrase(), $response->getStatusCode());
}
} catch (NetworkExceptionInterface $e) {
} catch (Throwable $e) {
return new ErrorFuture($e);
}
if ($retries >= $this->maxRetries) {
return new ErrorFuture(new RuntimeException('Export retry limit exceeded', 0, $e));
}
$delay = PsrUtils::retryDelay($retries, $this->retryDelay, $response);
$sec = (int) $delay;
$nsec = (int) (($delay - $sec) * 1e9);
/** @psalm-suppress ArgumentTypeCoercion */
if (time_nanosleep($sec, $nsec) !== true) {
return new ErrorFuture(new RuntimeException('Export cancelled', 0, $e));
}
}
assert(isset($response));
try {
$body = PsrUtils::decode(
$response->getBody()->__toString(),
self::parseContentEncoding($response),
);
} catch (Throwable $e) {
return new ErrorFuture($e);
}
return new CompletedFuture($body);
}
private static function parseContentEncoding(ResponseInterface $response): array
{
$encodings = [];
foreach (explode(',', $response->getHeaderLine('Content-Encoding')) as $encoding) {
if (($encoding = trim($encoding, " \t")) !== '') {
$encodings[] = strtolower($encoding);
}
}
return $encodings;
}
public function shutdown(?CancellationInterface $cancellation = null): bool
{
if ($this->closed) {
return false;
}
$this->closed = true;
return true;
}
public function forceFlush(?CancellationInterface $cancellation = null): bool
{
return !$this->closed;
}
}
|
