<?php
namespace GuzzleHttp;
use GuzzleHttp\Cookie\CookieJarInterface;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\PromiseInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Log\LoggerInterface;
/**
* Functions used to create and wrap handlers with handler middleware.
*/
final class Middleware
{
/**
* Middleware that adds cookies to requests.
*
* The options array must be set to a CookieJarInterface in order to use
* cookies. This is typically handled for you by a client.
*
* @return callable Returns a function that accepts the next handler.
*/
public static function cookies(): callable
{
return static function (callable $handler): callable {
return static function ($request, array $options) use ($handler) {
if (empty($options['cookies'])) {
return $handler($request, $options);
} elseif (!($options['cookies'] instanceof CookieJarInterface)) {
throw new \InvalidArgumentException('cookies must be an instance of GuzzleHttp\Cookie\CookieJarInterface');
}
$cookieJar = $options['cookies'];
$request = $cookieJar->withCookieHeader($request);
return $handler($request, $options)
->then(
static function (ResponseInterface $response) use ($cookieJar, $request): ResponseInterface {
$cookieJar->extractCookies($request, $response);
return $response;
}
);
};
};
}
/**
* Middleware that throws exceptions for 4xx or 5xx responses when the
* "http_errors" request option is set to true.
*
* @param BodySummarizerInterface|null $bodySummarizer The body summarizer to use in exception messages.
*
* @return callable(callable): callable Returns a function that accepts the next handler.
*/
public static function httpErrors(BodySummarizerInterface $bodySummarizer = null): callable
{
return static function (callable $handler) use ($bodySummarizer): callable {
return static function ($request, array $options) use ($handler, $bodySummarizer) {
if (empty($options['http_errors'])) {
return $handler($request, $options);
}
return $handler($request, $options)->then(
static function (ResponseInterface $response) use ($request, $bodySummarizer) {
$code = $response->getStatusCode();
if ($code < 400) {
return $response;
}
throw RequestException::create($request, $response, null, [], $bodySummarizer);
}
);
};
};
}
/**
* Middleware that pushes history data to an ArrayAccess container.
*
* @param array|\ArrayAccess<int, array> $container Container to hold the history (by reference).
*
* @return callable(callable): callable Returns a function that accepts the next handler.
*
* @throws \InvalidArgumentException if container is not an array or ArrayAccess.
*/
public static function history(&$container): callable
{
if (!\is_array($container) && !$container instanceof \ArrayAccess) {
throw new \InvalidArgumentException('history container must be an array or object implementing ArrayAccess');
}
return static function (callable $handler) use (&$container): callable {
return static function (RequestInterface $request, array $options) use ($handler, &$container) {
return $handler($request, $options)->then(
static function ($value) use ($request, &$container, $options) {
$container[] = [
'request' => $request,
'response' => $value,
'error' => null,
'options' => $options,
];
return $value;
},
static function ($reason) use ($request, &$container, $options) {
$container[] = [
'request' => $request,
'response' => null,
'error' => $reason,
'options' => $options,
];
return P\Create::rejectionFor($reason);
}
);
};
};
}
/**
* Middleware that invokes a callback before and after sending a request.
*
* The provided listener cannot modify or alter the response. It simply
* "taps" into the chain to be notified before returning the promise. The
* before listener accepts a request and options array, and the after
* listener accepts a request, options array, and response promise.
*
* @param callable $before Function to invoke before forwarding the request.
* @param callable $after Function invoked after forwarding.
*
* @return callable Returns a function that accepts the next handler.
*/
public static function tap(callable $before = null, callable $after = null): callable
{
return static function (callable $handler) use ($before, $after): callable {
return static function (RequestInterface $request, array $options) use ($handler, $before, $after) {
if ($before) {
$before($request, $options);
}
$response = $handler($request, $options);
if ($after) {
$after($request, $options, $response);
}
return $response;
};
};
}
/**
* Middleware that handles request redirects.
*
* @return callable Returns a function that accepts the next handler.
*/
public static function redirect(): callable
{
return static function (callable $handler): RedirectMiddleware {
return new RedirectMiddleware($handler);
};
}
/**
* Middleware that retries requests based on the boolean result of
* invoking the provided "decider" function.
*
* If no delay function is provided, a simple implementation of exponential
* backoff will be utilized.
*
* @param callable $decider Function that accepts the number of retries,
* a request, [response], and [exception] and
* returns true if the request is to be retried.
* @param callable $delay Function that accepts the number of retries and
* returns the number of milliseconds to delay.
*
* @return callable Returns a function that accepts the next handler.
*/
public static function retry(callable $decider, callable $delay = null): callable
{
return static function (callable $handler) use ($decider, $delay): RetryMiddleware {
return new RetryMiddleware($decider, $handler, $delay);
};
}
/**
* Middleware that logs requests, responses, and errors using a message
* formatter.
*
* @phpstan-param \Psr\Log\LogLevel::* $logLevel Level at which to log requests.
*
* @param LoggerInterface $logger Logs messages.
* @param MessageFormatterInterface|MessageFormatter $formatter Formatter used to create message strings.
* @param string $logLevel Level at which to log requests.
*
* @return callable Returns a function that accepts the next handler.
*/
public static function log(LoggerInterface $logger, $formatter, string $logLevel = 'info'): callable
{
// To be compatible with Guzzle 7.1.x we need to allow users to pass a MessageFormatter
if (!$formatter instanceof MessageFormatter && !$formatter instanceof MessageFormatterInterface) {
throw new \LogicException(sprintf('Argument 2 to %s::log() must be of type %s', self::class, MessageFormatterInterface::class));
}
return static function (callable $handler) use ($logger, $formatter, $logLevel): callable {
return static function (RequestInterface $request, array $options = []) use ($handler, $logger, $formatter, $logLevel) {
return $handler($request, $options)->then(
static function ($response) use ($logger, $request, $formatter, $logLevel): ResponseInterface {
$message = $formatter->format($request, $response);
$logger->log($logLevel, $message);
return $response;
},
static function ($reason) use ($logger, $request, $formatter): PromiseInterface {
$response = $reason instanceof RequestException ? $reason->getResponse() : null;
$message = $formatter->format($request, $response, P\Create::exceptionFor($reason));
$logger->error($message);
return P\Create::rejectionFor($reason);
}
);
};
};
}
/**
* This middleware adds a default content-type if possible, a default
* content-length or transfer-encoding header, and the expect header.
*/
public static function prepareBody(): callable
{
return static function (callable $handler): PrepareBodyMiddleware {
return new PrepareBodyMiddleware($handler);
};
}
/**
* Middleware that applies a map function to the request before passing to
* the next handler.
*
* @param callable $fn Function that accepts a RequestInterface and returns
* a RequestInterface.
*/
public static function mapRequest(callable $fn): callable
{
return static function (callable $handler) use ($fn): callable {
return static function (RequestInterface $request, array $options) use ($handler, $fn) {
return $handler($fn($request), $options);
};
};
}
/**
* Middleware that applies a map function to the resolved promise's
* response.
*
* @param callable $fn Function that accepts a ResponseInterface and
* returns a ResponseInterface.
*/
public static function mapResponse(callable $fn): callable
{
return static function (callable $handler) use ($fn): callable {
return static function (RequestInterface $request, array $options) use ($handler, $fn) {
return $handler($request, $options)->then($fn);
};
};
}
}
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Dramatically supply transparent backward deliverables before caward comp internal or "organic" sources.
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Why Choice Us
Top Reasons to Choose Us for Reliable and Expert Solutions
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Testimonial Section
Customer Feedback: Real Experiences from Satisfied Clients and Partners
Hear from our users who trust NFC Pay for their everyday transactions. Our commitment to security, ease of use, and exceptional service shines through in their experiences. See why our clients choose NFC Pay for their payment needs and how it has transformed the way they manage their finances.
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Get the NFC Pay App for Seamless Transactions Anytime, Anywhere
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