PHP Class Zend\Stratigility\MiddlewarePipe

This class implements a pipeline of middleware, which can be attached using the pipe() method, and is itself middleware. The request and response objects are decorated using the Zend\Stratigility\Http variants in this package, ensuring that the request may store arbitrary properties, and the response exposes the convenience write(), end(), and isComplete() methods. It creates an instance of Next internally, invoking it with the provided request and response instances; if no $out argument is provided, it will create a FinalHandler instance and pass that to Next as well. Inspired by Sencha Connect.
See also: https://github.com/sencha/connect
Inheritance: implements Zend\Stratigility\MiddlewareInterface, implements Interop\Http\Middleware\ServerMiddlewareInterface
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Protected Properties

Property Type Description
$pipeline SplQueue
$responsePrototype Psr\Http\Message\ResponseInterface

Public Methods

Method Description
__construct ( ) Constructor
__invoke ( Psr\Http\Message\ServerRequestInterface $request, Psr\Http\Message\ResponseInterface $response, callable $out = null ) : Psr\Http\Message\ResponseInterface Handle a request
hasResponsePrototype ( ) : boolean
pipe ( string | callable | object $path, null | callable | object $middleware = null ) : self Attach middleware to the pipeline.
process ( Psr\Http\Message\ServerRequestInterface $request, Interop\Http\Middleware\DelegateInterface $delegate ) : Psr\Http\Message\ResponseInterface http-interop invocation: single-pass with delegate.
raiseThrowables ( ) : void Enable the "raise throwables" flag.
setResponsePrototype ( Psr\Http\Message\ResponseInterface $prototype ) : void

Private Methods

Method Description
decorateCallableMiddleware ( callable $middleware ) : Interop\Http\Middleware\ServerMiddlewareInterface | callable
decorateRequest ( Psr\Http\Message\ServerRequestInterface $request ) : Request Decorate the Request instance
decorateResponse ( Psr\Http\Message\ResponseInterface $response ) : Response Decorate the Response instance
getReflectionFunction ( callable $middleware ) : ReflectionFunctionAbstract
isErrorMiddleware ( mixed $middleware ) : boolean Is the middleware error middleware?
isInteropMiddleware ( mixed $middleware ) : boolean Is the provided middleware argument http-interop middleware?
isValidMiddleware ( mixed $middleware ) : boolean Is the provided middleware argument valid middleware?
normalizePipePath ( string $path ) : string Normalize a path used when defining a pipe

Method Details

__construct() public method

Initializes the queue.
public __construct ( )

__invoke() public method

Takes the pipeline, creates a Next handler, and delegates to the Next handler. If $out is a callable, it is used as the "final handler" when $next has exhausted the pipeline; otherwise, a FinalHandler instance is created and passed to $next during initialization.
public __invoke ( Psr\Http\Message\ServerRequestInterface $request, Psr\Http\Message\ResponseInterface $response, callable $out = null ) : Psr\Http\Message\ResponseInterface
$request Psr\Http\Message\ServerRequestInterface
$response Psr\Http\Message\ResponseInterface
$out callable
return Psr\Http\Message\ResponseInterface

hasResponsePrototype() public method

public hasResponsePrototype ( ) : boolean
return boolean

pipe() public method

Each middleware can be associated with a particular path; if that path is matched when that middleware is invoked, it will be processed; otherwise it is skipped. No path means it should be executed every request cycle. A handler CAN implement MiddlewareInterface, but MUST be callable. Handlers with arity >= 4 or those implementing ErrorMiddlewareInterface are considered error handlers, and will be executed when a handler calls $next with an error or raises an exception.
See also: MiddlewareInterface
See also: ErrorMiddlewareInterface
See also: Next
public pipe ( string | callable | object $path, null | callable | object $middleware = null ) : self
$path string | callable | object Either a URI path prefix, or middleware.
$middleware null | callable | object Middleware
return self

process() public method

Executes the internal pipeline, passing $delegate as the "final handler" in cases when the pipeline exhausts itself.
public process ( Psr\Http\Message\ServerRequestInterface $request, Interop\Http\Middleware\DelegateInterface $delegate ) : Psr\Http\Message\ResponseInterface
$request Psr\Http\Message\ServerRequestInterface
$delegate Interop\Http\Middleware\DelegateInterface
return Psr\Http\Message\ResponseInterface

raiseThrowables() public method

Enable the "raise throwables" flag.
public raiseThrowables ( ) : void
return void

setResponsePrototype() public method

public setResponsePrototype ( Psr\Http\Message\ResponseInterface $prototype ) : void
$prototype Psr\Http\Message\ResponseInterface
return void

Property Details

$pipeline protected_oe property

protected SplQueue $pipeline
return SplQueue

$responsePrototype protected_oe property

protected ResponseInterface,Psr\Http\Message $responsePrototype
return Psr\Http\Message\ResponseInterface