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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\HTTP;
use ICanBoogie\Accessor\AccessorTrait;
use ICanBoogie\Prototype\MethodNotDefined;
/**
* An HTTP request.
*
* <pre>
* <?php
*
* use ICanBoogie\HTTP\Request;
*
* # Creating the main request
*
* $request = Request::from($_SERVER);
*
* # Creating a request from scratch, with the current environment.
*
* $request = Request::from([
*
* 'uri' => '/path/to/my/page.html?page=2',
* 'user_agent' => 'Mozilla'
* 'is_get' => true,
* 'is_xhr' => true,
* 'is_local' => true
*
* ], $_SERVER);
* </pre>
*
* @method Response connect() connect(array $params=null)
* @method Response delete() delete(array $params=null)
* @method Response get() get(array $params=null)
* @method Response head() head(array $params=null)
* @method Response options() options(array $params=null)
* @method Response post() post(array $params=null)
* @method Response put() put(array $params=null)
* @method Response patch() patch(array $params=null)
* @method Response trace() trace(array $params=null)
*
* @property-read \ICanBoogie\HTTP\Request\Context $context the request's context.
* @property-read Request $parent Parent request.
* @property-read FileList $files The files associated with the request.
*
* @property-read boolean $authorization Authorization of the request.
* @property-read int $content_length Length of the request content.
* @property-read Headers\CacheControl $cache_control
* @property-read string $ip Remote IP of the request.
* @property-read boolean $is_delete Is this a `DELETE` request?
* @property-read boolean $is_get Is this a `GET` request?
* @property-read boolean $is_head Is this a `HEAD` request?
* @property-read boolean $is_options Is this a `OPTIONS` request?
* @property-read boolean $is_patch Is this a `PATCH` request?
* @property-read boolean $is_post Is this a `POST` request?
* @property-read boolean $is_put Is this a `PUT` request?
* @property-read boolean $is_trace Is this a `TRACE` request?
* @property-read boolean $is_local Is this a local request?
* @property-read boolean $is_xhr Is this an Ajax request?
* @property-read string $method Method of the request.
* @property-read string $normalized_path Path of the request normalized using the {@link \ICanBoogie\normalize_url_path()} function.
* @property-read string $path Path info of the request.
* @property-read string $extension The extension of the path.
* @property-read int $port Port of the request.
* @property-read string $query_string Query string of the request.
* @property-read string $script_name Name of the entered script.
* @property-read string $referer Referer of the request.
* @property-read string $user_agent User agent of the request.
* @property-read string $uri URI of the request. The `QUERY_STRING` value of the environment
* is overwritten when the instance is created with the {@link $uri} property.
*
* @see http://en.wikipedia.org/wiki/Uniform_resource_locator
*/
class Request implements \ArrayAccess, \IteratorAggregate
{
use AccessorTrait;
/*
* HTTP methods as defined by the {@link http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html Hypertext Transfer protocol 1.1}.
*/
const METHOD_ANY = 'ANY';
const METHOD_CONNECT = 'CONNECT';
const METHOD_DELETE = 'DELETE';
const METHOD_GET = 'GET';
const METHOD_HEAD = 'HEAD';
const METHOD_OPTIONS = 'OPTIONS';
const METHOD_POST = 'POST';
const METHOD_PUT = 'PUT';
const METHOD_PATCH = 'PATCH';
const METHOD_TRACE = 'TRACE';
static public $methods = [
self::METHOD_CONNECT,
self::METHOD_DELETE,
self::METHOD_GET,
self::METHOD_HEAD,
self::METHOD_OPTIONS,
self::METHOD_POST,
self::METHOD_PUT,
self::METHOD_PATCH,
self::METHOD_TRACE
];
static private $properties_mappers;
/**
* Returns request properties mappers.
*
* @return \Closure[]
*/
static protected function get_properties_mappers()
{
if (self::$properties_mappers)
{
return self::$properties_mappers;
}
return self::$properties_mappers = static::create_properties_mappers();
}
/**
* Returns request properties mappers.
*
* @return \Closure[]
*/
static protected function create_properties_mappers()
{
return [
'path_params' => function($value) { return $value; },
'query_params' => function($value) { return $value; },
'request_params' => function($value) { return $value; },
'cookie' => function($value) { return $value; },
'files' => function($value) { return $value; },
'headers' => function($value) { return ($value instanceof Headers) ? $value : new Headers($value); },
'cache_control' => function($value, array &$env) { $env['HTTP_CACHE_CONTROL'] = $value; },
'content_length' => function($value, array &$env) { $env['CONTENT_LENGTH'] = $value; },
'ip' => function($value, array &$env) { if ($value) $env['REMOTE_ADDR'] = $value; },
'is_local' => function($value, array &$env) { if ($value) $env['REMOTE_ADDR'] = '::1'; },
'is_delete' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_DELETE; },
'is_connect' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_CONNECT; },
'is_get' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_GET; },
'is_head' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_HEAD; },
'is_options' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_OPTIONS; },
'is_patch' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_PATCH; },
'is_post' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_POST; },
'is_put' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_PUT; },
'is_trace' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = Request::METHOD_TRACE; },
'is_xhr' => function($value, array &$env) { if ($value) $env['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'; else unset($env['HTTP_X_REQUESTED_WITH']); },
'method' => function($value, array &$env) { if ($value) $env['REQUEST_METHOD'] = $value; },
'path' => function($value, array &$env) { $env['REQUEST_URI'] = $value; }, // TODO-20130521: handle query string
'referer' => function($value, array &$env) { $env['HTTP_REFERER'] = $value; },
'uri' => function($value, array &$env) { $env['REQUEST_URI'] = $value; $qs = strpos($value, '?'); $env['QUERY_STRING'] = $qs === false ? '' : substr($value, $qs + 1); },
'user_agent' => function($value, array &$env) { $env['HTTP_USER_AGENT'] = $value; }
];
}
/**
* Current request.
*
* @var Request
*/
static protected $current_request;
/**
* Returns the current request.
*
* @return Request
*/
static public function get_current_request()
{
return self::$current_request;
}
/**
* Parameters extracted from the request path.
*
* @var array
*/
public $path_params = [];
/**
* Parameters defined by the query string.
*
* @var array
*/
public $query_params = [];
/**
* Parameters defined by the request body.
*
* @var array
*/
public $request_params = [];
/**
* Union of {@link $path_params}, {@link $request_params} and {@link $query_params}.
*
* @var array
*/
public $params;
/**
* General purpose container.
*
* @var Request\Context
*/
protected $context;
/**
* The headers of the request.
*
* @var Headers
*/
public $headers;
/**
* Request environment.
*
* @var array
*/
protected $env;
/**
* Files associated with the request.
*
* @var FileList
*/
protected $files;
protected function get_files()
{
if ($this->files instanceof FileList)
{
return $this->files;
}
return $this->files = FileList::from($this->files);
}
public $cookie;
/**
* Parent request.
*
* @var Request
*/
protected $parent;
/**
* A request can be created from the `$_SERVER` super global array. In that case `$_SERVER` is
* used as environment the request is created with the following properties:
*
* - {@link $cookie}: a reference to the `$_COOKIE` super global array.
* - {@link $path_params}: initialized to an empty array.
* - {@link $query_params}: a reference to the `$_GET` super global array.
* - {@link $request_params}: a reference to the `$_POST` super global array.
* - {@link $files}: a reference to the `$_FILES` super global array.
*
* A request can also be created from an array of properties, in which case most of them are
* mapped to the `$env` constructor param. For instance, `is_xhr` set the
* `HTTP_X_REQUESTED_WITH` environment property to 'XMLHttpRequest'. In fact, only the
* following parameters are preserved:
*
* - `path_params`
* - `query_params`
* - `request_params`
* - `files`: The files associated with the request.
* - `headers`: The header fields of the request. If specified, the headers available in the
* environment are ignored.
*
* @param array $properties Properties of the request.
* @param array $env Environment, usually the `$_SERVER` array.
*
* @throws \InvalidArgumentException in attempt to use a property that is not mapped to an
* environment property.
*
* @return Request
*/
static public function from($properties = null, array $env = [])
{
if (!$properties)
{
return new static([], $env);
}
if ($properties === $_SERVER)
{
return static::from_server();
}
if (is_string($properties) || (is_object($properties) && method_exists($properties, '__toString')))
{
return static::from_uri((string) $properties, $env);
}
return static::from_properties($properties, $env);
}
/**
* Creates an instance from the `$_SERVER` array.
*
* @return Request
*/
static protected function from_server()
{
return static::from([
'cookie' => &$_COOKIE,
'path_params' => [],
'query_params' => &$_GET,
'request_params' => &$_POST,
'files' => &$_FILES // @codeCoverageIgnore
], $_SERVER);
}
/**
* Creates an instance from an URI.
*
* @param string $uri
* @param array $env
*
* @return Request
*/
static protected function from_uri($uri, array $env)
{
return static::from([ 'uri' => $uri ], $env);
}
/**
* Creates an instance from an array of properties.
*
* @param array $properties
* @param array $env
*
* @return Request
*/
static protected function from_properties(array $properties, array $env)
{
$properties = $properties ?: [];
$mappers = static::get_properties_mappers();
foreach ($properties as $property => &$value)
{
if (empty($mappers[$property]))
{
throw new \InvalidArgumentException("Unsupported property: <q>$property</q>.");
}
$value = $mappers[$property]($value, $env);
if ($value === null)
{
unset($properties[$property]);
}
}
if (!empty($env['QUERY_STRING']))
{
parse_str($env['QUERY_STRING'], $properties['query_params']);
}
return new static($properties, $env);
}
/**
* Initialize the properties {@link $env}, {@link $headers} and {@link $context}.
*
* If the {@link $params} property is `null` it is set with an union of {@link $path_params},
* {@link $request_params} and {@link $query_params}.
*
* @param array $properties Initial properties.
* @param array $env Environment of the request, usually the `$_SERVER` super global.
*
* @throws MethodNotSupported when the request method is not supported.
*/
protected function __construct(array $properties, array $env = [])
{
$this->context = new Request\Context($this);
$this->env = $env;
foreach ($properties as $property => $value)
{
$this->$property = $value;
}
$this->assert_method($this->method);
if (!$this->headers)
{
$this->headers = new Headers($env);
}
if ($this->params === null)
{
$this->params = $this->path_params + $this->request_params + $this->query_params;
}
}
/**
* Clone {@link $headers} and {@link $context}, and unset {@link $params}.
*/
public function __clone()
{
$this->headers = clone $this->headers;
$this->context = clone $this->context;
unset($this->params);
}
/**
* Alias for {@link send()}.
*
* @return Response The response to the request.
*/
public function __invoke()
{
return $this->send();
}
/**
* Dispatch the request.
*
* The {@link parent} property is used for request chaining.
*
* Note: If an exception is thrown during dispatch {@link $current_request} is not updated!
*
* Note: If the request is changed because of the `$method` or `$params` parameters, it
* is the _changed_ instance that is dispatched, not the actual instance.
*
* @param string|null $method Use this parameter to change the request method.
* @param array|null $params Use this parameter to change the {@link $request_params}
* property of the request.
*
* @return Response The response to the request.
*
* @throws \Exception re-throws exception raised during dispatch.
*/
public function send($method = null, array $params = null)
{
$request = $this->adapt($method, $params);
$this->parent = self::$current_request;
self::$current_request = $request;
try
{
$response = $request->dispatch();
self::$current_request = $request->parent;
return $response;
}
catch (\Exception $e)
{
self::$current_request = $request->parent;
throw $e;
}
}
/**
* Dispatches the request using the {@link dispatch()} helper.
*
* @return Response
*/
protected function dispatch()
{
return dispatch($this); // @codeCoverageIgnore
}
/**
* Asserts that a method is supported.
*
* @param string $method
*
* @throws MethodNotSupported
*/
private function assert_method($method)
{
if (!in_array($method, self::$methods))
{
throw new MethodNotSupported($method);
}
}
/**
* Returns a new instance with the specified changed properties.
*
* @param array $properties
*
* @throws \InvalidArgumentException
*
* @return Request
*/
public function with(array $properties)
{
$changed = clone $this;
$mappers = static::get_properties_mappers();
$env = &$changed->env;
foreach ($properties as $property => $value)
{
if (empty($mappers[$property]))
{
throw new \InvalidArgumentException("Unsupported property: <q>$property</q>.");
}
$value = $mappers[$property]($value, $env);
if ($value === null)
{
continue;
}
$changed->$property = $value;
}
return $changed;
}
/**
* Adapts the request to the specified method and params.
*
* @param string $method The method.
* @param array $params The params.
*
* @return Request The same instance is returned if the method is the same and the params
* are `null`. Otherwise a _changed_ request is returned.
*/
protected function adapt($method, array $params = null)
{
if ((!$method || $method == $this->method) && !$params)
{
return $this;
}
$properties = [];
if ($method)
{
$properties = [ 'method' => $method ];
}
if ($params !== null)
{
$properties['request_params'] = $params;
$properties['path_params'] = [];
$properties['query_params'] = [];
}
return $this->with($properties);
}
/**
* Overrides the method to provide a virtual method for each request method.
*
* Example:
*
* <pre>
* <?php
*
* Request::from('/api/core/aloha')->get();
* </pre>
*
* @param $method
* @param $arguments
*
* @return mixed
*/
public function __call($method, $arguments)
{
$http_method = strtoupper($method);
if (in_array($http_method, self::$methods))
{
array_unshift($arguments, $http_method);
return call_user_func_array([ $this, 'send' ], $arguments);
}
throw new MethodNotDefined($method, $this);
}
/**
* Checks if the specified param exists in the request's params.
*
* @param string $param The name of the parameter.
*
* @return bool
*/
public function offsetExists($param)
{
return isset($this->params[$param]);
}
/**
* Get the specified param from the request's params.
*
* @param string $param The name of the parameter.
*
* @return mixed|null The value of the parameter, or `null` if the parameter does not exists.
*/
public function offsetGet($param)
{
return isset($this->params[$param]) ? $this->params[$param] : null;
}
/**
* Set the specified param to the specified value.
*
* @param string $param The name of the parameter.
* @param mixed $value The value of the parameter.
*/
public function offsetSet($param, $value)
{
$this->params;
$this->params[$param] = $value;
$this->request_params[$param] = $value;
}
/**
* Remove the specified param from the request's parameters.
*
* @param mixed $param
*/
public function offsetUnset($param)
{
unset($this->params[$param]);
}
/**
* Returns an array iterator for the params.
*
* @return \ArrayIterator
*/
public function getIterator()
{
return new \ArrayIterator($this->params);
}
/**
* Returns the parent request.
*
* @return Request
*/
protected function get_parent()
{
return $this->parent;
}
/**
* Returns the request's context.
*
* @return Request\Context
*/
protected function get_context()
{
return $this->context;
}
/**
* Returns the `Cache-Control` header.
*
* @return Headers\CacheControl
*/
protected function get_cache_control()
{
return $this->headers['Cache-Control'];
}
/**
* Returns the script name.
*
* The setter is volatile, the value is returned from the ENV key `SCRIPT_NAME`.
*
* @return string
*/
protected function get_script_name()
{
return $this->env['SCRIPT_NAME'];
}
/**
* Returns the request method.
*
* This is the getter for the `method` magic property.
*
* The method is retrieved from {@link $env}, if the key `REQUEST_METHOD` is not defined,
* the method defaults to {@link METHOD_GET}.
*
* @return string
*/
protected function get_method()
{
$method = isset($this->env['REQUEST_METHOD']) ? $this->env['REQUEST_METHOD'] : self::METHOD_GET;
if ($method == self::METHOD_POST && !empty($this->request_params['_method']))
{
$method = strtoupper($this->request_params['_method']);
}
return $method;
}
/**
* Returns the query string of the request.
*
* The value is obtained from the `QUERY_STRING` key of the {@link $env} array.
*
* @return string|null
*/
protected function get_query_string()
{
return isset($this->env['QUERY_STRING']) ? $this->env['QUERY_STRING'] : null;
}
/**
* Returns the content length of the request.
*
* The value is obtained from the `CONTENT_LENGTH` key of the {@link $env} array.
*
* @return int|null
*/
protected function get_content_length()
{
return isset($this->env['CONTENT_LENGTH']) ? $this->env['CONTENT_LENGTH'] : null;
}
/**
* Returns the referer of the request.
*
* The value is obtained from the `HTTP_REFERER` key of the {@link $env} array.
*
* @return string|null
*/
protected function get_referer()
{
return isset($this->env['HTTP_REFERER']) ? $this->env['HTTP_REFERER'] : null;
}
/**
* Returns the user agent of the request.
*
* The value is obtained from the `HTTP_USER_AGENT` key of the {@link $env} array.
*
* @return string|null
*/
protected function get_user_agent()
{
return isset($this->env['HTTP_USER_AGENT']) ? $this->env['HTTP_USER_AGENT'] : null;
}
/**
* Checks if the request method is `DELETE`.
*
* @return boolean
*/
protected function get_is_delete()
{
return $this->method == self::METHOD_DELETE;
}
/**
* Checks if the request method is `GET`.
*
* @return boolean
*/
protected function get_is_get()
{
return $this->method == self::METHOD_GET;
}
/**
* Checks if the request method is `HEAD`.
*
* @return boolean
*/
protected function get_is_head()
{
return $this->method == self::METHOD_HEAD;
}
/**
* Checks if the request method is `OPTIONS`.
*
* @return boolean
*/
protected function get_is_options()
{
return $this->method == self::METHOD_OPTIONS;
}
/**
* Checks if the request method is `PATCH`.
*
* @return boolean
*/
protected function get_is_patch()
{
return $this->method == self::METHOD_PATCH;
}
/**
* Checks if the request method is `POST`.
*
* @return boolean
*/
protected function get_is_post()
{
return $this->method == self::METHOD_POST;
}
/**
* Checks if the request method is `PUT`.
*
* @return boolean
*/
protected function get_is_put()
{
return $this->method == self::METHOD_PUT;
}
/**
* Checks if the request method is `TRACE`.
*
* @return boolean
*/
protected function get_is_trace()
{
return $this->method == self::METHOD_TRACE;
}
/**
* Checks if the request is a `XMLHTTPRequest`.
*
* @return boolean
*/
protected function get_is_xhr()
{
return !empty($this->env['HTTP_X_REQUESTED_WITH']) && preg_match('/XMLHttpRequest/', $this->env['HTTP_X_REQUESTED_WITH']);
}
/**
* Checks if the request is local.
*
* @return boolean
*/
protected function get_is_local()
{
$ip = $this->ip;
if ($ip == '::1' || preg_match('/^127\.0\.0\.\d{1,3}$/', $ip))
{
return true;
}
return preg_match('/^0:0:0:0:0:0:0:1(%.*)?$/', $ip);
}
/**
* Returns the remote IP of the request.
*
* If defined, the `HTTP_X_FORWARDED_FOR` header is used to retrieve the original IP.
*
* If the `REMOTE_ADDR` header is empty the request is considered local thus `::1` is returned.
*
* @see http://en.wikipedia.org/wiki/X-Forwarded-For
*
* @return string
*/
protected function get_ip()
{
$forwarded_for = $this->headers['X-Forwarded-For'];
if ($forwarded_for)
{
list($ip) = explode(',', $forwarded_for);
return $ip;
}
return (isset($this->env['REMOTE_ADDR']) ? $this->env['REMOTE_ADDR'] : null) ?: '::1';
}
protected function get_authorization()
{
if (isset($this->env['HTTP_AUTHORIZATION']))
{
return $this->env['HTTP_AUTHORIZATION'];
}
else if (isset($this->env['X-HTTP_AUTHORIZATION']))
{
return $this->env['X-HTTP_AUTHORIZATION'];
}
else if (isset($this->env['X_HTTP_AUTHORIZATION']))
{
return $this->env['X_HTTP_AUTHORIZATION'];
}
else if (isset($this->env['REDIRECT_X_HTTP_AUTHORIZATION']))
{
return $this->env['REDIRECT_X_HTTP_AUTHORIZATION'];
}
return null;
}
/**
* Returns the `REQUEST_URI` environment key.
*
* If the `REQUEST_URI` key is not defined by the environment, the value is fetched from
* the `$_SERVER` array. If the key is not defined in the `$_SERVER` array `null` is returned.
*
* @return string
*/
protected function get_uri()
{
return isset($this->env['REQUEST_URI'])
? $this->env['REQUEST_URI']
: (isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : null);
}
/**
* Returns the port of the request.
*
* @return int
*/
protected function get_port()
{
return $this->env['REQUEST_PORT'];
}
/**
* Returns the path of the request, that is the `REQUEST_URI` without the query string.
*
* @return string
*/
protected function get_path()
{
$uri = $this->uri;
$qs_pos = strpos($uri, '?');
return ($qs_pos === false) ? $uri : substr($uri, 0, $qs_pos);
}
/**
* Returns the {@link $path} property normalized using the
* {@link \ICanBoogie\normalize_url_path()} function.
*
* @return string
*/
protected function get_normalized_path()
{
return \ICanBoogie\normalize_url_path($this->path);
}
/**
* Returns the extension of the path info.
*
* @return mixed
*/
protected function get_extension()
{
return pathinfo($this->path, PATHINFO_EXTENSION);
}
protected function lazy_set_params($params)
{
return $params;
}
/**
* Returns the union of the {@link path_params}, {@link request_params} and
* {@link query_params} properties.
*
* This method is the getter of the {@link $params} magic property.
*
* @return array
*/
protected function lazy_get_params()
{
return $this->path_params + $this->request_params + $this->query_params;
}
}