<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\TransferStats;
use GuzzleHttp\Utils;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamInterface;
/**
* Handler that returns responses or throw exceptions from a queue.
*
* @final
*/
class MockHandler implements \Countable
{
/**
* @var array
*/
private $queue = [];
/**
* @var RequestInterface|null
*/
private $lastRequest;
/**
* @var array
*/
private $lastOptions = [];
/**
* @var callable|null
*/
private $onFulfilled;
/**
* @var callable|null
*/
private $onRejected;
/**
* Creates a new MockHandler that uses the default handler stack list of
* middlewares.
*
* @param array|null $queue Array of responses, callables, or exceptions.
* @param callable|null $onFulfilled Callback to invoke when the return value is fulfilled.
* @param callable|null $onRejected Callback to invoke when the return value is rejected.
*/
public static function createWithMiddleware(array $queue = null, callable $onFulfilled = null, callable $onRejected = null): HandlerStack
{
return HandlerStack::create(new self($queue, $onFulfilled, $onRejected));
}
/**
* The passed in value must be an array of
* {@see \Psr\Http\Message\ResponseInterface} objects, Exceptions,
* callables, or Promises.
*
* @param array<int, mixed>|null $queue The parameters to be passed to the append function, as an indexed array.
* @param callable|null $onFulfilled Callback to invoke when the return value is fulfilled.
* @param callable|null $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) {
// array_values included for BC
$this->append(...array_values($queue));
}
}
public function __invoke(RequestInterface $request, array $options): PromiseInterface
{
if (!$this->queue) {
throw new \OutOfBoundsException('Mock queue is empty');
}
if (isset($options['delay']) && \is_numeric($options['delay'])) {
\usleep((int) $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 = $response($request, $options);
}
$response = $response instanceof \Throwable
? P\Create::rejectionFor($response)
: P\Create::promiseFor($response);
return $response->then(
function (?ResponseInterface $value) use ($request, $options) {
$this->invokeStats($request, $options, $value);
if ($this->onFulfilled) {
($this->onFulfilled)($value);
}
if ($value !== null && isset($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 StreamInterface) {
$sink->write($contents);
}
}
return $value;
},
function ($reason) use ($request, $options) {
$this->invokeStats($request, $options, null, $reason);
if ($this->onRejected) {
($this->onRejected)($reason);
}
return P\Create::rejectionFor($reason);
}
);
}
/**
* Adds one or more variadic requests, exceptions, callables, or promises
* to the queue.
*
* @param mixed ...$values
*/
public function append(...$values): void
{
foreach ($values as $value) {
if ($value instanceof ResponseInterface
|| $value instanceof \Throwable
|| $value instanceof PromiseInterface
|| \is_callable($value)
) {
$this->queue[] = $value;
} else {
throw new \TypeError('Expected a Response, Promise, Throwable or callable. Found '.Utils::describeType($value));
}
}
}
/**
* Get the last received request.
*/
public function getLastRequest(): ?RequestInterface
{
return $this->lastRequest;
}
/**
* Get the last received request options.
*/
public function getLastOptions(): array
{
return $this->lastOptions;
}
/**
* Returns the number of remaining items in the queue.
*/
public function count(): int
{
return \count($this->queue);
}
public function reset(): void
{
$this->queue = [];
}
/**
* @param mixed $reason Promise or reason.
*/
private function invokeStats(
RequestInterface $request,
array $options,
ResponseInterface $response = null,
$reason = null
): void {
if (isset($options['on_stats'])) {
$transferTime = $options['transfer_time'] ?? 0;
$stats = new TransferStats($request, $response, $transferTime, $reason);
($options['on_stats'])($stats);
}
}
}
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