<?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);
};
};
}
}
NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.
Simplifying Payments, One Tap at a Time.
Reinventing Your Wallet for Modern Convenience.
Smart Payments for a Effortless Lifestyle.
Experience the Ease of Tap and Pay.
Innovative Solutions for Your Daily Transactions.
FAQ Section
Frequently Asked Questions About NFC Pay
Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.
How do I register for NFC Pay?
Download the app and sign up using your email or phone number, then complete the verification process.
Is my payment information secure?
Yes, we use advanced encryption and security protocols to protect your payment details.
Can I add multiple cards to my NFC Pay wallet?
Absolutely, you can link multiple debit or credit cards to your wallet.
How do I transfer money to another user?
Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.
What should I do if I forget my PIN?
Use the “Forgot PIN” feature in the app to reset it following the provided instructions.
How can I activate my merchant account?
Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.
Can I track my payment status?
Yes, you can view and track your payment status in the account dashboard
In the digital age, privacy concerns have become increasingly paramount, prompting the European Union to enact the General Data Protection Regulation (GDPR) in 2018. Among its many provisions, GDPR sets strict guidelines for the collection and processing of personal data, including the use of cookies on websites. Privacy Policy
