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<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Promise\RejectedPromise;
use GuzzleHttp\TransferStats;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Handler that returns responses or throw exceptions from a queue.
*/
class MockHandler implements \Countable
{
private $queue = [];
private $lastRequest;
private $lastOptions;
private $onFulfilled;
private $onRejected;
/**
* Creates a new MockHandler that uses the default handler stack list of
* middlewares.
*
* @param array $queue Array of responses, callables, or exceptions.
* @param callable $onFulfilled Callback to invoke when the return value is fulfilled.
* @param callable $onRejected Callback to invoke when the return value is rejected.
*
* @return HandlerStack
*/
public static function createWithMiddleware(
array $queue = null,
callable $onFulfilled = null,
callable $onRejected = null
) {
return HandlerStack::create(new self($queue, $onFulfilled, $onRejected));
}
/**
* The passed in value must be an array of
* {@see Psr7\Http\Message\ResponseInterface} objects, Exceptions,
* callables, or Promises.
*
* @param array $queue
* @param callable $onFulfilled Callback to invoke when the return value is fulfilled.
* @param callable $onRejected Callback to invoke when the return value is rejected.
*/
public function __construct(
array $queue = null,
callable $onFulfilled = null,
callable $onRejected = null
) {
$this->onFulfilled = $onFulfilled;
$this->onRejected = $onRejected;
if ($queue) {
call_user_func_array([$this, 'append'], $queue);
}
}
public function __invoke(RequestInterface $request, array $options)
{
if (!$this->queue) {
throw new \OutOfBoundsException('Mock queue is empty');
}
if (isset($options['delay'])) {
usleep($options['delay'] * 1000);
}
$this->lastRequest = $request;
$this->lastOptions = $options;
$response = array_shift($this->queue);
if (isset($options['on_headers'])) {
if (!is_callable($options['on_headers'])) {
throw new \InvalidArgumentException('on_headers must be callable');
}
try {
$options['on_headers']($response);
} catch (\Exception $e) {
$msg = 'An error was encountered during the on_headers event';
$response = new RequestException($msg, $request, $response, $e);
}
}
if (is_callable($response)) {
$response = call_user_func($response, $request, $options);
}
$response = $response instanceof \Exception
? \GuzzleHttp\Promise\rejection_for($response)
: \GuzzleHttp\Promise\promise_for($response);
return $response->then(
function ($value) use ($request, $options) {
$this->invokeStats($request, $options, $value);
if ($this->onFulfilled) {
call_user_func($this->onFulfilled, $value);
}
if (isset($options['sink'])) {
$contents = (string) $value->getBody();
$sink = $options['sink'];
if (is_resource($sink)) {
fwrite($sink, $contents);
} elseif (is_string($sink)) {
file_put_contents($sink, $contents);
} elseif ($sink instanceof \Psr\Http\Message\StreamInterface) {
$sink->write($contents);
}
}
return $value;
},
function ($reason) use ($request, $options) {
$this->invokeStats($request, $options, null, $reason);
if ($this->onRejected) {
call_user_func($this->onRejected, $reason);
}
return \GuzzleHttp\Promise\rejection_for($reason);
}
);
}
/**
* Adds one or more variadic requests, exceptions, callables, or promises
* to the queue.
*/
public function append()
{
foreach (func_get_args() as $value) {
if ($value instanceof ResponseInterface
|| $value instanceof \Exception
|| $value instanceof PromiseInterface
|| is_callable($value)
) {
$this->queue[] = $value;
} else {
throw new \InvalidArgumentException('Expected a response or '
. 'exception. Found ' . \GuzzleHttp\describe_type($value));
}
}
}
/**
* Get the last received request.
*
* @return RequestInterface
*/
public function getLastRequest()
{
return $this->lastRequest;
}
/**
* Get the last received request options.
*
* @return array
*/
public function getLastOptions()
{
return $this->lastOptions;
}
/**
* Returns the number of remaining items in the queue.
*
* @return int
*/
public function count()
{
return count($this->queue);
}
private function invokeStats(
RequestInterface $request,
array $options,
ResponseInterface $response = null,
$reason = null
) {
if (isset($options['on_stats'])) {
$stats = new TransferStats($request, $response, 0, $reason);
call_user_func($options['on_stats'], $stats);
}
}
}