Zend Framework教程-Zend_Controller_Request请求对象的封装

请求对象是在前端控制器，路由器，分发器，以及控制类间传递的简单值对象。请求对象封装了请求的模块，控制器，动作以及可选的参数，还包括其他的请求环境，如HTTP，CLI，PHP-GTK。

请求对象的基本实现

├── Request│   ├── Abstract.php│   ├── Apache404.php│   ├── Exception.php│   ├── Http.php│   ├── HttpTestCase.php│   └── Simple.php

实现了请求对象的基本方法。

<?phpabstract class Zend_Controller_Request_Abstract{    protected $_dispatched = false;    protected $_module;    protected $_moduleKey = 'module';    protected $_controller;    protected $_controllerKey = 'controller';    protected $_action;    protected $_actionKey = 'action';    protected $_params = array();    public function getModuleName()    {        if (null === $this->_module) {            $this->_module = $this->getParam($this->getModuleKey());        }        return $this->_module;    }    public function setModuleName($value)    {        $this->_module = $value;        return $this;    }    public function getControllerName()    {        if (null === $this->_controller) {            $this->_controller = $this->getParam($this->getControllerKey());        }        return $this->_controller;    }    public function setControllerName($value)    {        $this->_controller = $value;        return $this;    }    public function getActionName()    {        if (null === $this->_action) {            $this->_action = $this->getParam($this->getActionKey());        }        return $this->_action;    }    public function setActionName($value)    {        $this->_action = $value;        /**         * @see ZF-3465         */        if (null === $value) {            $this->setParam($this->getActionKey(), $value);        }        return $this;    }    public function getModuleKey()    {        return $this->_moduleKey;    }    public function setModuleKey($key)    {        $this->_moduleKey = (string) $key;        return $this;    }    public function getControllerKey()    {        return $this->_controllerKey;    }    public function setControllerKey($key)    {        $this->_controllerKey = (string) $key;        return $this;    }    public function getActionKey()    {        return $this->_actionKey;    }    public function setActionKey($key)    {        $this->_actionKey = (string) $key;        return $this;    }    public function getParam($key, $default = null)    {        $key = (string) $key;        if (isset($this->_params[$key])) {            return $this->_params[$key];        }        return $default;    }    public function getUserParams()    {        return $this->_params;    }    public function getUserParam($key, $default = null)    {        if (isset($this->_params[$key])) {            return $this->_params[$key];        }        return $default;    }    public function setParam($key, $value)    {        $key = (string) $key;        if ((null === $value) && isset($this->_params[$key])) {            unset($this->_params[$key]);        } elseif (null !== $value) {            $this->_params[$key] = $value;        }        return $this;    }     public function getParams()     {         return $this->_params;     }    public function setParams(array $array)    {        $this->_params = $this->_params + (array) $array;        foreach ($array as $key => $value) {            if (null === $value) {                unset($this->_params[$key]);            }        }        return $this;    }    public function clearParams()    {        $this->_params = array();        return $this;    }    public function setDispatched($flag = true)    {        $this->_dispatched = $flag ? true : false;        return $this;    }    public function isDispatched()    {        return $this->_dispatched;    }}

Zend_Controller_Request请求对象的默认实现。

<?phprequire_once 'Zend/Controller/Request/Abstract.php';require_once 'Zend/Uri.php';class Zend_Controller_Request_Http extends Zend_Controller_Request_Abstract{    const SCHEME_HTTP  = 'http';    const SCHEME_HTTPS = 'https';    protected $_paramSources = array('_GET', '_POST');    protected $_requestUri;    protected $_baseUrl = null;    protected $_basePath = null;    protected $_pathInfo = '';    protected $_params = array();    protected $_rawBody;    protected $_aliases = array();    public function __construct($uri = null)    {        if (null !== $uri) {            if (!$uri instanceof Zend_Uri) {                $uri = Zend_Uri::factory($uri);            }            if ($uri->valid()) {                $path  = $uri->getPath();                $query = $uri->getQuery();                if (!empty($query)) {                    $path .= '?' . $query;                }                $this->setRequestUri($path);            } else {                require_once 'Zend/Controller/Request/Exception.php';                throw new Zend_Controller_Request_Exception('Invalid URI provided to constructor');            }        } else {            $this->setRequestUri();        }    }    public function __get($key)    {        switch (true) {            case isset($this->_params[$key]):                return $this->_params[$key];            case isset($_GET[$key]):                return $_GET[$key];            case isset($_POST[$key]):                return $_POST[$key];            case isset($_COOKIE[$key]):                return $_COOKIE[$key];            case ($key == 'REQUEST_URI'):                return $this->getRequestUri();            case ($key == 'PATH_INFO'):                return $this->getPathInfo();            case isset($_SERVER[$key]):                return $_SERVER[$key];            case isset($_ENV[$key]):                return $_ENV[$key];            default:                return null;        }    }    public function get($key)    {        return $this->__get($key);    }    public function __set($key, $value)    {        require_once 'Zend/Controller/Request/Exception.php';        throw new Zend_Controller_Request_Exception('Setting values in superglobals not allowed; please use setParam()');    }    public function set($key, $value)    {        return $this->__set($key, $value);    }    public function __isset($key)    {        switch (true) {            case isset($this->_params[$key]):                return true;            case isset($_GET[$key]):                return true;            case isset($_POST[$key]):                return true;            case isset($_COOKIE[$key]):                return true;            case isset($_SERVER[$key]):                return true;            case isset($_ENV[$key]):                return true;            default:                return false;        }    }    public function has($key)    {        return $this->__isset($key);    }    public function setQuery($spec, $value = null)    {        if ((null === $value) && !is_array($spec)) {            require_once 'Zend/Controller/Exception.php';            throw new Zend_Controller_Exception('Invalid value passed to setQuery(); must be either array of values or key/value pair');        }        if ((null === $value) && is_array($spec)) {            foreach ($spec as $key => $value) {                $this->setQuery($key, $value);            }            return $this;        }        $_GET[(string) $spec] = $value;        return $this;    }    public function getQuery($key = null, $default = null)    {        if (null === $key) {            return $_GET;        }        return (isset($_GET[$key])) ? $_GET[$key] : $default;    }    public function setPost($spec, $value = null)    {        if ((null === $value) && !is_array($spec)) {            require_once 'Zend/Controller/Exception.php';            throw new Zend_Controller_Exception('Invalid value passed to setPost(); must be either array of values or key/value pair');        }        if ((null === $value) && is_array($spec)) {            foreach ($spec as $key => $value) {                $this->setPost($key, $value);            }            return $this;        }        $_POST[(string) $spec] = $value;        return $this;    }    public function getPost($key = null, $default = null)    {        if (null === $key) {            return $_POST;        }        return (isset($_POST[$key])) ? $_POST[$key] : $default;    }    public function getCookie($key = null, $default = null)    {        if (null === $key) {            return $_COOKIE;        }        return (isset($_COOKIE[$key])) ? $_COOKIE[$key] : $default;    }    public function getServer($key = null, $default = null)    {        if (null === $key) {            return $_SERVER;        }        return (isset($_SERVER[$key])) ? $_SERVER[$key] : $default;    }    public function getEnv($key = null, $default = null)    {        if (null === $key) {            return $_ENV;        }        return (isset($_ENV[$key])) ? $_ENV[$key] : $default;    }    public function setRequestUri($requestUri = null)    {        if ($requestUri === null) {            if (isset($_SERVER['HTTP_X_REWRITE_URL'])) { // check this first so IIS will catch                $requestUri = $_SERVER['HTTP_X_REWRITE_URL'];            } elseif (                // IIS7 with URL Rewrite: make sure we get the unencoded url (double slash problem)                isset($_SERVER['IIS_WasUrlRewritten'])                && $_SERVER['IIS_WasUrlRewritten'] == '1'                && isset($_SERVER['UNENCODED_URL'])                && $_SERVER['UNENCODED_URL'] != ''                ) {                $requestUri = $_SERVER['UNENCODED_URL'];            } elseif (isset($_SERVER['REQUEST_URI'])) {                $requestUri = $_SERVER['REQUEST_URI'];                // Http proxy reqs setup request uri with scheme and host [and port] + the url path, only use url path                $schemeAndHttpHost = $this->getScheme() . '://' . $this->getHttpHost();                if (strpos($requestUri, $schemeAndHttpHost) === 0) {                    $requestUri = substr($requestUri, strlen($schemeAndHttpHost));                }            } elseif (isset($_SERVER['ORIG_PATH_INFO'])) { // IIS 5.0, PHP as CGI                $requestUri = $_SERVER['ORIG_PATH_INFO'];                if (!empty($_SERVER['QUERY_STRING'])) {                    $requestUri .= '?' . $_SERVER['QUERY_STRING'];                }            } else {                return $this;            }        } elseif (!is_string($requestUri)) {            return $this;        } else {            // Set GET items, if available            if (false !== ($pos = strpos($requestUri, '?'))) {                // Get key => value pairs and set $_GET                $query = substr($requestUri, $pos + 1);                parse_str($query, $vars);                $this->setQuery($vars);            }        }        $this->_requestUri = $requestUri;        return $this;    }    public function getRequestUri()    {        if (empty($this->_requestUri)) {            $this->setRequestUri();        }        return $this->_requestUri;    }    public function setBaseUrl($baseUrl = null)    {        if ((null !== $baseUrl) && !is_string($baseUrl)) {            return $this;        }        if ($baseUrl === null) {            $filename = (isset($_SERVER['SCRIPT_FILENAME'])) ? basename($_SERVER['SCRIPT_FILENAME']) : '';            if (isset($_SERVER['SCRIPT_NAME']) && basename($_SERVER['SCRIPT_NAME']) === $filename) {                $baseUrl = $_SERVER['SCRIPT_NAME'];            } elseif (isset($_SERVER['PHP_SELF']) && basename($_SERVER['PHP_SELF']) === $filename) {                $baseUrl = $_SERVER['PHP_SELF'];            } elseif (isset($_SERVER['ORIG_SCRIPT_NAME']) && basename($_SERVER['ORIG_SCRIPT_NAME']) === $filename) {                $baseUrl = $_SERVER['ORIG_SCRIPT_NAME']; // 1and1 shared hosting compatibility            } else {                // Backtrack up the script_filename to find the portion matching                // php_self                $path    = isset($_SERVER['PHP_SELF']) ? $_SERVER['PHP_SELF'] : '';                $file    = isset($_SERVER['SCRIPT_FILENAME']) ? $_SERVER['SCRIPT_FILENAME'] : '';                $segs    = explode('/', trim($file, '/'));                $segs    = array_reverse($segs);                $index   = 0;                $last    = count($segs);                $baseUrl = '';                do {                    $seg     = $segs[$index];                    $baseUrl = '/' . $seg . $baseUrl;                    ++$index;                } while (($last > $index) && (false !== ($pos = strpos($path, $baseUrl))) && (0 != $pos));            }            // Does the baseUrl have anything in common with the request_uri?            $requestUri = $this->getRequestUri();            if (0 === strpos($requestUri, $baseUrl)) {                // full $baseUrl matches                $this->_baseUrl = $baseUrl;                return $this;            }            if (0 === strpos($requestUri, dirname($baseUrl))) {                // directory portion of $baseUrl matches                $this->_baseUrl = rtrim(dirname($baseUrl), '/');                return $this;            }            $truncatedRequestUri = $requestUri;            if (($pos = strpos($requestUri, '?')) !== false) {                $truncatedRequestUri = substr($requestUri, 0, $pos);            }            $basename = basename($baseUrl);            if (empty($basename) || !strpos($truncatedRequestUri, $basename)) {                // no match whatsoever; set it blank                $this->_baseUrl = '';                return $this;            }            // If using mod_rewrite or ISAPI_Rewrite strip the script filename            // out of baseUrl. $pos !== 0 makes sure it is not matching a value            // from PATH_INFO or QUERY_STRING            if ((strlen($requestUri) >= strlen($baseUrl))                && ((false !== ($pos = strpos($requestUri, $baseUrl))) && ($pos !== 0)))            {                $baseUrl = substr($requestUri, 0, $pos + strlen($baseUrl));            }        }        $this->_baseUrl = rtrim($baseUrl, '/');        return $this;    }    public function getBaseUrl($raw = false)    {        if (null === $this->_baseUrl) {            $this->setBaseUrl();        }        return (($raw == false) ? urldecode($this->_baseUrl) : $this->_baseUrl);    }    public function setBasePath($basePath = null)    {        if ($basePath === null) {            $filename = (isset($_SERVER['SCRIPT_FILENAME']))                      ? basename($_SERVER['SCRIPT_FILENAME'])                      : '';            $baseUrl = $this->getBaseUrl();            if (empty($baseUrl)) {                $this->_basePath = '';                return $this;            }            if (basename($baseUrl) === $filename) {                $basePath = dirname($baseUrl);            } else {                $basePath = $baseUrl;            }        }        if (substr(PHP_OS, 0, 3) === 'WIN') {            $basePath = str_replace('', '/', $basePath);        }        $this->_basePath = rtrim($basePath, '/');        return $this;    }    public function getBasePath()    {        if (null === $this->_basePath) {            $this->setBasePath();        }        return $this->_basePath;    }    public function setPathInfo($pathInfo = null)    {        if ($pathInfo === null) {            $baseUrl = $this->getBaseUrl(); // this actually calls setBaseUrl() & setRequestUri()            $baseUrlRaw = $this->getBaseUrl(false);            $baseUrlEncoded = urlencode($baseUrlRaw);                    if (null === ($requestUri = $this->getRequestUri())) {                return $this;            }                    // Remove the query string from REQUEST_URI            if ($pos = strpos($requestUri, '?')) {                $requestUri = substr($requestUri, 0, $pos);            }                        if (!empty($baseUrl) || !empty($baseUrlRaw)) {                if (strpos($requestUri, $baseUrl) === 0) {                    $pathInfo = substr($requestUri, strlen($baseUrl));                } elseif (strpos($requestUri, $baseUrlRaw) === 0) {                    $pathInfo = substr($requestUri, strlen($baseUrlRaw));                } elseif (strpos($requestUri, $baseUrlEncoded) === 0) {                    $pathInfo = substr($requestUri, strlen($baseUrlEncoded));                } else {                    $pathInfo = $requestUri;                }            } else {                $pathInfo = $requestUri;            }                }        $this->_pathInfo = (string) $pathInfo;        return $this;    }    public function getPathInfo()    {        if (empty($this->_pathInfo)) {            $this->setPathInfo();        }        return $this->_pathInfo;    }    public function setParamSources(array $paramSources = array())    {        $this->_paramSources = $paramSources;        return $this;    }    public function getParamSources()    {        return $this->_paramSources;    }    public function setParam($key, $value)    {        $key = (null !== ($alias = $this->getAlias($key))) ? $alias : $key;        parent::setParam($key, $value);        return $this;    }    public function getParam($key, $default = null)    {        $keyName = (null !== ($alias = $this->getAlias($key))) ? $alias : $key;        $paramSources = $this->getParamSources();        if (isset($this->_params[$keyName])) {            return $this->_params[$keyName];        } elseif (in_array('_GET', $paramSources) && (isset($_GET[$keyName]))) {            return $_GET[$keyName];        } elseif (in_array('_POST', $paramSources) && (isset($_POST[$keyName]))) {            return $_POST[$keyName];        }        return $default;    }    public function getParams()    {        $return       = $this->_params;        $paramSources = $this->getParamSources();        if (in_array('_GET', $paramSources)            && isset($_GET)            && is_array($_GET)        ) {            $return += $_GET;        }        if (in_array('_POST', $paramSources)            && isset($_POST)            && is_array($_POST)        ) {            $return += $_POST;        }        return $return;    }    public function setParams(array $params)    {        foreach ($params as $key => $value) {            $this->setParam($key, $value);        }        return $this;    }    public function setAlias($name, $target)    {        $this->_aliases[$name] = $target;        return $this;    }    public function getAlias($name)    {        if (isset($this->_aliases[$name])) {            return $this->_aliases[$name];        }        return null;    }    public function getAliases()    {        return $this->_aliases;    }    public function getMethod()    {        return $this->getServer('REQUEST_METHOD');    }    public function isPost()    {        if ('POST' == $this->getMethod()) {            return true;        }        return false;    }    public function isGet()    {        if ('GET' == $this->getMethod()) {            return true;        }        return false;    }    public function isPut()    {        if ('PUT' == $this->getMethod()) {            return true;        }        return false;    }    public function isDelete()    {        if ('DELETE' == $this->getMethod()) {            return true;        }        return false;    }    public function isHead()    {        if ('HEAD' == $this->getMethod()) {            return true;        }        return false;    }    public function isOptions()    {        if ('OPTIONS' == $this->getMethod()) {            return true;        }        return false;    }    public function isXmlHttpRequest()    {        return ($this->getHeader('X_REQUESTED_WITH') == 'XMLHttpRequest');    }    public function isFlashRequest()    {        $header = strtolower($this->getHeader('USER_AGENT'));        return (strstr($header, ' flash')) ? true : false;    }    public function isSecure()    {        return ($this->getScheme() === self::SCHEME_HTTPS);    }    public function getRawBody()    {        if (null === $this->_rawBody) {            $body = file_get_contents('php://input');            if (strlen(trim($body)) > 0) {                $this->_rawBody = $body;            } else {                $this->_rawBody = false;            }        }        return $this->_rawBody;    }    public function getHeader($header)    {        if (empty($header)) {            require_once 'Zend/Controller/Request/Exception.php';            throw new Zend_Controller_Request_Exception('An HTTP header name is required');        }        // Try to get it from the $_SERVER array first        $temp = 'HTTP_' . strtoupper(str_replace('-', '_', $header));        if (isset($_SERVER[$temp])) {            return $_SERVER[$temp];        }        // This seems to be the only way to get the Authorization header on        // Apache        if (function_exists('apache_request_headers')) {            $headers = apache_request_headers();            if (isset($headers[$header])) {                return $headers[$header];            }            $header = strtolower($header);            foreach ($headers as $key => $value) {                if (strtolower($key) == $header) {                    return $value;                }            }        }        return false;    }    public function getScheme()    {        return ($this->getServer('HTTPS') == 'on') ? self::SCHEME_HTTPS : self::SCHEME_HTTP;    }    public function getHttpHost()    {        $host = $this->getServer('HTTP_HOST');        if (!empty($host)) {            return $host;        }        $scheme = $this->getScheme();        $name   = $this->getServer('SERVER_NAME');        $port   = $this->getServer('SERVER_PORT');        if(null === $name) {            return '';        }        elseif (($scheme == self::SCHEME_HTTP && $port == 80) || ($scheme == self::SCHEME_HTTPS && $port == 443)) {            return $name;        } else {            return $name . ':' . $port;        }    }    public function getClientIp($checkProxy = true)    {        if ($checkProxy && $this->getServer('HTTP_CLIENT_IP') != null) {            $ip = $this->getServer('HTTP_CLIENT_IP');        } else if ($checkProxy && $this->getServer('HTTP_X_FORWARDED_FOR') != null) {            $ip = $this->getServer('HTTP_X_FORWARDED_FOR');        } else {            $ip = $this->getServer('REMOTE_ADDR');        }        return $ip;    }}

从上述类的实现，不难看出，类为我们提供了很多方便的方法来获取需要的数据。例如：

模块名可通过getModuleName()和setModuleName()访问。

控制器名可通过getControllerName()和setControllerName()访问。

控制器调用的动作名称可通过getActionName()和setActionName()访问。

子类化请求对象。

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