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/*
* The MIT License
*
* @author Brian Dayhoff <mopsyd@me.com>
* @copyright (c) 2017, Brian Dayhoff <mopsyd@me.com> all rights reserved.
* @license http://opensource.org/licenses/MIT The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
namespace oroboros\core\interfaces\contract\libraries\request;
/**
* <Server Request Contract Interface>
* Represents a Psr-7 server request object.
*
* Representation of an incoming, server-side HTTP request.
*
* Per the HTTP specification, this interface includes properties for
* each of the following:
*
* - Protocol version
* - HTTP method
* - URI
* - Headers
* - Message body
*
* Additionally, it encapsulates all data as it has arrived at the
* application from the CGI and/or PHP environment, including:
*
* - The values represented in $_SERVER.
* - Any cookies provided (generally via $_COOKIE)
* - Query string arguments (generally via $_GET, or as parsed via parse_str())
* - Upload files, if any (as represented by $_FILES)
* - Deserialized body parameters (generally from $_POST)
*
* $_SERVER values MUST be treated as immutable, as they represent application
* state at the time of request; as such, no methods are provided to allow
* modification of those values. The other values provide such methods, as they
* can be restored from $_SERVER or the request body, and may need treatment
* during the application (e.g., body parameters may be deserialized based on
* content type).
*
* Additionally, this interface recognizes the utility of introspecting a
* request to derive and match additional parameters (e.g., via URI path
* matching, decrypting cookie values, deserializing non-form-encoded body
* content, matching authorization headers to users, etc). These parameters
* are stored in an "attributes" property.
*
* Requests are considered immutable; all methods that might change state MUST
* be implemented such that they retain the internal state of the current
* message and return an instance that contains the changed state.
*
* --------
* Contract interfaces enforce expected behavior in a non-colliding way.
* They are tasked with enforcing methods, and extending interfaces
* provided by standards and other packages for compatibility.
*
* All valid oroboros classes MUST extend at
* least one Contract Interface to be considered valid.
* --------
*
* @author Brian Dayhoff <mopsyd@me.com>
* @license http://opensource.org/licenses/MIT The MIT License (MIT)
* @link bitbucket.org/oroborosframework/oroboros-core/wiki/development/api/contract_interface.md
* @category contract-interfaces
* @package oroboros/core
* @subpackage psr7
* @version 0.2.4-alpha
* @since 0.2.4-alpha
*/
interface ServerRequestContract
extends RequestContract,
\Psr\Http\Message\ServerRequestInterface
{
/**
* <Server Request Constructor>
* Instantiates an instance of a Psr-7 server request object.
* @param scalar|resource|\Psr\Http\Message\StreamInterface $body This is the only required value for the constructor, and represents a message body as a scalar value, resource pointer, or instance of a stream interface.
* @param type $headers (optional) If provided, represents an array of headers to construct with the message.
* @param type $protocol (optional) If provided, the HTTP request protocol will be set to this value. Default value is "1.1"
* @param string $host (optional) If provided, a host header will be explicitly set to this value. If not supplied, it will return the current host, or 127.0.0.1 if the host could not be determined or the request originated from CLI.
* @param string $uri (optional) If provided, an endpoint uri will be explicitly set to this value. If not supplied, it will return the current host, or 127.0.0.1 if the host could not be determined or the request originated from CLI.
* @param string $method (optional) If provided, a request method will be explicitly set to this value. If not supplied, it will return the same request method of the current page load, or GET if it could not be determined or the request originated from CLI.
* @param array $params An array of parameters, following the convention of the $_SERVER superglobal
* @param array $cookies An array of parameters, following the convention of the $_COOKIE superglobal
* @param array $query An array of parameters, following the convention of the $_GET superglobal
* @param array $files An array of parameters, following the convention of the $_FILES superglobal
* @param array $parsed An array of parameters, following the convention of the $_POST superglobal
* @param array $attributes (optional) An array of request-specific parameters
* @throws \oroboros\core\utilities\exception\InvalidArgumentException if any passed parameters do not validate
*/
public function __construct( $body, array $headers = null, $protocol = null,
$host = null, $uri = null, $method = null, array $params = array(),
array $cookies = array(), array $query = array(),
array $files = array(), array $parsed = array(),
array $attributes = array() );
/**
* <Server Request Creation Method>
* Provides a simpler way of instantiating a new object based
* on only the superglobal state or equivalent, so that the
* provided constructor does not interfere with the
* Liskov Substitution Principle, but in general use,
* the object is not cumbersome to generate either.
*
* This is the suggested means of creating an instance
* with your own parameters.
*
* If you would like to automatically create an instance from existing superglobals,
* it is suggested to instead use the fromGlobals method.
*
* @see \oroboros\core\traits\libraries\request\ServerRequestTrait::fromGlobals()
*
* @param array $params
* @param array $cookies
* @param array $query
* @param array $files
* @param array $parsed
* @param array $attributes
* @return \oroboros\core\traits\libraries\request\ServerRequestTrait
* @throws \oroboros\core\utilities\exception\InvalidArgumentException If instantiation cannot occur due to bad parameters
*/
public static function create(
array $params = array(), array $cookies = array(), array $query = array(),
array $files = array(), array $parsed = array(),
array $attributes = array()
);
/**
* <Server Request Automatic Generation Method>
* This is the suggested means of creating an instance of an object
* using this trait automatically from existing globals.
*
* In the event that you have to pass your own parameters,
* it is suggested to use the create method instead.
*
* @see \oroboros\core\traits\libraries\request\ServerRequestTrait::create()
*
* Constructs an instance of the current class using the current superglobals.
* As a safety measure, superglobals will be spoofed as empty arrays if they
* are not available (ie: if you have not called session_start, or the
* request if from CLI and therefore does not have $_GET or $_POST).
*
* This method will use $_SESSION for the $attributes
* parameter of the constructor.
*
* If the request originated from CLI, $argv will be used in place of $_GET
* if it is available. The first parameter if $argv is to be omitted, as it
* only designates the php script name of the original request, and is
* also available in $_SERVER.
*
* The $_REQUEST superglobal is to be ignored,
* as all of it's values are provided in $_GET and $_POST.
*
* @return \oroboros\core\traits\libraries\request\ServerRequestTrait
*/
public static function fromGlobals();
/**
* Retrieve server parameters.
*
* Retrieves data related to the incoming request environment,
* typically derived from PHP's $_SERVER superglobal. The data IS NOT
* REQUIRED to originate from $_SERVER.
*
* @return array
*/
public function getServerParams();
/**
* Retrieve cookies.
*
* Retrieves cookies sent by the client to the server.
*
* The data MUST be compatible with the structure of the $_COOKIE
* superglobal.
*
* @return array
*/
public function getCookieParams();
/**
* Return an instance with the specified cookies.
*
* The data IS NOT REQUIRED to come from the $_COOKIE superglobal, but MUST
* be compatible with the structure of $_COOKIE. Typically, this data will
* be injected at instantiation.
*
* This method MUST NOT update the related Cookie header of the request
* instance, nor related values in the server params.
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated cookie values.
*
* @param array $cookies Array of key/value pairs representing cookies.
* @return static
*/
public function withCookieParams( array $cookies );
/**
* Retrieve query string arguments.
*
* Retrieves the deserialized query string arguments, if any.
*
* Note: the query params might not be in sync with the URI or server
* params. If you need to ensure you are only getting the original
* values, you may need to parse the query string from `getUri()->getQuery()`
* or from the `QUERY_STRING` server param.
*
* @return array
*/
public function getQueryParams();
/**
* Return an instance with the specified query string arguments.
*
* These values SHOULD remain immutable over the course of the incoming
* request. They MAY be injected during instantiation, such as from PHP's
* $_GET superglobal, or MAY be derived from some other value such as the
* URI. In cases where the arguments are parsed from the URI, the data
* MUST be compatible with what PHP's parse_str() would return for
* purposes of how duplicate query parameters are handled, and how nested
* sets are handled.
*
* Setting query string arguments MUST NOT change the URI stored by the
* request, nor the values in the server params.
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated query string arguments.
*
* @param array $query Array of query string arguments, typically from
* $_GET.
* @return static
*/
public function withQueryParams( array $query );
/**
* Retrieve normalized file upload data.
*
* This method returns upload metadata in a normalized tree, with each leaf
* an instance of Psr\Http\Message\UploadedFileInterface.
*
* These values MAY be prepared from $_FILES or the message body during
* instantiation, or MAY be injected via withUploadedFiles().
*
* @return array An array tree of UploadedFileInterface instances; an empty
* array MUST be returned if no data is present.
*/
public function getUploadedFiles();
/**
* Create a new instance with the specified uploaded files.
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated body parameters.
*
* @param array $uploadedFiles An array tree of UploadedFileInterface instances.
* @return static
* @throws \InvalidArgumentException if an invalid structure is provided.
*/
public function withUploadedFiles( array $uploadedFiles );
/**
* Retrieve any parameters provided in the request body.
*
* If the request Content-Type is either application/x-www-form-urlencoded
* or multipart/form-data, and the request method is POST, this method MUST
* return the contents of $_POST.
*
* Otherwise, this method may return any results of deserializing
* the request body content; as parsing returns structured content, the
* potential types MUST be arrays or objects only. A null value indicates
* the absence of body content.
*
* @return null|array|object The deserialized body parameters, if any.
* These will typically be an array or object.
*/
public function getParsedBody();
/**
* Return an instance with the specified body parameters.
*
* These MAY be injected during instantiation.
*
* If the request Content-Type is either application/x-www-form-urlencoded
* or multipart/form-data, and the request method is POST, use this method
* ONLY to inject the contents of $_POST.
*
* The data IS NOT REQUIRED to come from $_POST, but MUST be the results of
* deserializing the request body content. Deserialization/parsing returns
* structured data, and, as such, this method ONLY accepts arrays or objects,
* or a null value if nothing was available to parse.
*
* As an example, if content negotiation determines that the request data
* is a JSON payload, this method could be used to create a request
* instance with the deserialized parameters.
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated body parameters.
*
* @param null|array|object $data The deserialized body data. This will
* typically be in an array or object.
* @return static
* @throws \InvalidArgumentException if an unsupported argument type is
* provided.
*/
public function withParsedBody( $data );
/**
* Retrieve attributes derived from the request.
*
* The request "attributes" may be used to allow injection of any
* parameters derived from the request: e.g., the results of path
* match operations; the results of decrypting cookies; the results of
* deserializing non-form-encoded message bodies; etc. Attributes
* will be application and request specific, and CAN be mutable.
*
* @return mixed[] Attributes derived from the request.
*/
public function getAttributes();
/**
* Retrieve a single derived request attribute.
*
* Retrieves a single derived request attribute as described in
* getAttributes(). If the attribute has not been previously set, returns
* the default value as provided.
*
* This method obviates the need for a hasAttribute() method, as it allows
* specifying a default value to return if the attribute is not found.
*
* @see getAttributes()
* @param string $name The attribute name.
* @param mixed $default Default value to return if the attribute does not exist.
* @return mixed
*/
public function getAttribute( $name, $default = null );
/**
* Return an instance with the specified derived request attribute.
*
* This method allows setting a single derived request attribute as
* described in getAttributes().
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated attribute.
*
* @see getAttributes()
* @param string $name The attribute name.
* @param mixed $value The value of the attribute.
* @return static
*/
public function withAttribute( $name, $value );
/**
* Return an instance that removes the specified derived request attribute.
*
* This method allows removing a single derived request attribute as
* described in getAttributes().
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that removes
* the attribute.
*
* @see getAttributes()
* @param string $name The attribute name.
* @return static
*/
public function withoutAttribute( $name );
}