HttpClient::query

public function query($method, $url, $entityBody = null)
{
	$this->effectiveUrl = $url;
	$this->effectiveIp = null;
	$this->error = [];

	if (is_array($entityBody))
	{
		$entityBody = new HttpFormStream($entityBody);
	}

	if ($entityBody instanceof HttpStream)
	{
		$body = $entityBody;
	}
	elseif (is_resource($entityBody))
	{
		$body = new HttpStream($entityBody);
	}
	else
	{
		$body = new HttpStream('php://temp', 'r+');
		$body->write($entityBody ?? '');
	}

	$this->redirectCount = 0;

	while (true)
	{
		//Only absoluteURI is accepted
		//Location response-header field must be absoluteURI either
		$uri = new Uri($this->effectiveUrl);

		// make a PSR-7 request
		$request = new HttpRequest($method, $uri, $this->headers->getHeaders(), $body, $this->version);

		try
		{
			// PSR-18 magic is here
			$this->sendRequest($request);
		}
		catch (ClientExceptionInterface $e)
		{
			// compatibility mode
			if ($e instanceof NetworkExceptionInterface)
			{
				$this->addError('NETWORK', $e->getMessage());
			}
			return false;
		}

		if (!$this->waitResponse)
		{
			return true;
		}

		if ($this->redirect && ($location = $this->getHeaders()->get('Location')) !== null && $location != '')
		{
			if ($this->redirectCount < $this->redirectMax)
			{
				// there can be different host in Location
				$this->headers->delete('Host');
				$this->effectiveUrl = $location;

				$status = $this->getStatus();
				if ($status == 302 || $status == 303)
				{
					$method = HttpMethod::GET;
				}

				$this->redirectCount++;
			}
			else
			{
				$this->addError('REDIRECT', "Maximum number of redirects ({$this->redirectMax}) has been reached at URL {$url}", true);
				return false;
			}
		}
		else
		{
			return true;
		}
	}
}