added TUrlManager and fixed #451.

7 files changed, 268 insertions, 131 deletions

diff --git a/.gitattributes b/.gitattributes
index c67c8d8c..198a29a4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1524,6 +1524,7 @@ framework/Web/THttpRequest.php -text
 framework/Web/THttpResponse.php -text
 framework/Web/THttpSession.php -text
 framework/Web/THttpUtility.php -text
+framework/Web/TUrlManager.php -text
 framework/Web/TUrlMapping.php -text
 framework/Web/UI/TClientScriptManager.php -text
 framework/Web/UI/TCompositeControl.php -text
diff --git a/HISTORY b/HISTORY
index 004287c2..ec3f721e 100644
--- a/HISTORY
+++ b/HISTORY
@@ -7,6 +7,7 @@ BUG: TTableCell should render   only when Text is not set and there's no ch
 BUG: global state was not saved when redirect() is invoked (Qiang)
 BUG: TPager would not display if it was invisible previously (Qiang)
 ENH: Ticket#446 - Added TMetaTagCollection.getMetaTagByID method (Qiang)
+ENH: Ticket#451 - Modified TUrlMapping to extend from TUrlManager (Qiang)
 ENH: Ticket#468 - Added support of using all property tags in skins (Qiang)
 ENH: Ticket#471 - Added methods in TAssetManager to expose published path and URL (Qiang)
 CHG: Ticket#437 - __autoload is replaced by spl_autoload_register (Qiang)
@@ -16,6 +17,7 @@ CHG: TDataGrid now does not set default table styles (Qiang)
 CHG: TRepeater does not render <span> anymore for empty item template (Qiang)
 CHG: THttpRequest.constructUrl() now encodes ampersand by default (Qiang)
 CHG: TDataBoundControl will not throw exception if CurrentPageIndex is out of range (Qiang)
+NEW: TUrlManager (Qiang)
 
 Version 3.0.5 October 23, 2006
 ==============================
diff --git a/framework/Exceptions/messages.txt b/framework/Exceptions/messages.txt
index fb0f6836..191e93af 100644
--- a/framework/Exceptions/messages.txt
+++ b/framework/Exceptions/messages.txt
@@ -48,6 +48,10 @@ securitymanager_mcryptextension_required = Mcrypt PHP extension is required in o
 

 uri_format_invalid						= '{0}' is not a valid URI.

 

+httprequest_separator_invalid			= THttpRequest.UrlParamSeparator can only contain a single character.

+httprequest_urlmanager_inexist			= THttpRequest.UrlManager '{0}' does not point to an existing module.

+httprequest_urlmanager_invalid			= THttpRequest.UrlManager '{0}' must point to a module extending from TUrlManager.

+

 httpresponse_bufferoutput_unchangeable	= THttpResponse.BufferOutput cannot be modified after THttpResponse is initialized.

 httpresponse_file_inexistent			= THttpResponse cannot send file '{0}'. The file does not exist.

 

diff --git a/framework/TApplication.php b/framework/TApplication.php
index ba3d3551..be551089 100644
--- a/framework/TApplication.php
+++ b/framework/TApplication.php
@@ -879,6 +879,8 @@ class TApplication extends TComponent
 		$request=$this->getRequest();
 		$request->setAvailableServices($serviceIDs);
 
+		$request->resolveRequest();
+
 		if(($serviceID=$request->getServiceID())===null)
 			$serviceID=self::PAGE_SERVICE_ID;
 		if(isset($services[$serviceID]))
diff --git a/framework/Web/THttpRequest.php b/framework/Web/THttpRequest.php
index bb7b4281..47fe1230 100644
--- a/framework/Web/THttpRequest.php
+++ b/framework/Web/THttpRequest.php
@@ -10,6 +10,8 @@
  * @package System.Web

  */

 

+Prado::using('System.Web.TUrlManager');

+

 /**

  * THttpRequest class

  *

@@ -38,17 +40,26 @@
  * takes precedence.

  *

  * To construct a URL that can be recognized by Prado, use {@link constructUrl()}.

- * THttpRequest also provides the cookies sent by the user, user information such

- * as his browser capabilities, accepted languages, etc.

- * Currently, THttpRequest recognizes the following URL format:

+ * The format of the recognizable URLs is determined according to

+ * {@link setUrlManager UrlManager}. By default, the following two formats

+ * are recognized:

  * <code>

- * /index.php?ServiceID=ServiceParameter

+ * /index.php?ServiceID=ServiceParameter&Name1=Value1&Name2=Value2

+ * /index.php/ServiceID,ServiceParameter/Name1,Value1/Name2,Value2

  * </code>

- * where ServiceID is as defined in the application configuration (e.g.

- * the default page service's service ID is 'page').

- * Therefore, your GET variable names should not conflict with the service

+ * The first format is called 'Get' while the second 'Path', which is specified

+ * via {@link setUrlFormat UrlFormat}. For advanced users who want to use

+ * their own URL formats, they can write customized URL management modules

+ * and install the managers as application modules and set {@link setUrlManager UrlManager}.

+ *

+ * The ServiceID in the above URLs is as defined in the application configuration

+ * (e.g. the default page service's service ID is 'page').

+ * As a consequence, your GET variable names should not conflict with the service

  * IDs that your application supports.

  *

+ * THttpRequest also provides the cookies sent by the user, user information such

+ * as his browser capabilities, accepted languages, etc.

+ *

  * By default, THttpRequest is registered with {@link TApplication} as the

  * request module. It can be accessed via {@link TApplication::getRequest()}.

  *

@@ -60,13 +71,17 @@
 class THttpRequest extends TApplicationComponent implements IteratorAggregate,ArrayAccess,Countable,IModule

 {

 	/**

-	 * Separator used to separate GET variable name and value when URL format is Path.

+	 * @var TUrlManager the URL manager module

 	 */

-	private $_separator=',';

+	private $_urlManager=null;

 	/**

-	 * @var boolean whether the module is initialized

+	 * @var string the ID of the URL manager module

 	 */

-	private $_initialized=false;

+	private $_urlManagerID='';

+	/**

+	 * @var string Separator used to separate GET variable name and value when URL format is Path.

+	 */

+	private $_separator=',';

 	/**

 	 * @var string requested service ID

 	 */

@@ -87,7 +102,10 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 * @var string path info of URL

 	 */

 	private $_pathInfo;

-

+	/**

+	 * @var boolean whether the session ID should be kept in cookie only

+	 */

+	private $_cookieOnly=false;

 	private $_urlFormat=THttpRequestUrlFormat::Get;

 	private $_services;

 	private $_requestResolved=false;

@@ -130,6 +148,20 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 */

 	public function init($config)

 	{

+		if(empty($this->_urlManagerID))

+		{

+			$this->_urlManager=new TUrlManager;

+			$this->_urlManager->init(null);

+		}

+		else

+		{

+			$this->_urlManager=$this->getApplication()->getModule($this->_urlManagerID);

+			if($this->_urlManager===null)

+				throw new TConfigurationException('httprequest_urlmanager_inexist',$this->_urlManagerID);

+			if(!($this->_urlManager instanceof TUrlManager))

+				throw new TConfigurationException('httprequest_urlmanager_invalid',$this->_urlManagerID);

+		}

+

 		// Fill in default request info when the script is run in command line

 		if(php_sapi_name()==='cli')

 		{

@@ -140,6 +172,8 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 			$_SERVER['HTTP_USER_AGENT']='';

 		}

 

+		$this->_cookieOnly=(int)ini_get('session.use_cookies') && (int)ini_get('session.use_only_cookies');

+

 		// Info about server variables:

 		// PHP_SELF contains real URI (w/ path info, w/o query string)

 		// SCRIPT_NAME is the real URI for the requested script (w/o path info and query string)

@@ -170,12 +204,6 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 				$_COOKIE=$this->stripSlashes($_COOKIE);

 		}

 

-		if($this->getUrlFormat()===THttpRequestUrlFormat::Path && ($pathInfo=trim($this->_pathInfo,'/'))!=='')

-			$this->_items=array_merge($this->parseUrl(),$_POST);

-		else

-			$this->_items=array_merge($_GET,$_POST);

-

-		$this->_initialized=true;

 		$this->getApplication()->setRequest($this);

 	}

 

@@ -215,6 +243,35 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	}

 

 	/**

+	 * @return string the ID of the URL manager module

+	 */

+	public function getUrlManager()

+	{

+		return $this->_urlManagerID;

+	}

+

+	/**

+	 * Sets the URL manager module.

+	 * By default, {@link TUrlManager} is used for managing URLs.

+	 * You may specify a different module for URL managing tasks

+	 * by loading it as an application module and setting this property

+	 * with the module ID.

+	 * @param string the ID of the URL manager module

+	 */

+	public function setUrlManager($value)

+	{

+		$this->_urlManagerID=$value;

+	}

+

+	/**

+	 * @return TUrlManager the URL manager module

+	 */

+	public function getUrlManagerModule()

+	{

+		return $this->_urlManager;

+	}

+

+	/**

 	 * @return THttpRequestUrlFormat the format of URLs. Defaults to THttpRequestUrlFormat::Get.

 	 */

 	public function getUrlFormat()

@@ -472,105 +529,37 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	}

 

 	/**

-	 * Constructs a URL that is recognizable by Prado.

-	 * You may override this method to provide your own way of URL formatting.

-	 * If you do so, you may also need to override {@link parseUrl} so that the URL can be properly parsed.

-	 * The URL is constructed as the following format:

-	 * /entryscript.php?serviceID=serviceParameter&get1=value1&...

-	 * If {@link setUrlFormat UrlFormat} is Path, the following format is used instead:

-	 * /entryscript.php/serviceID/serviceParameter/get1,value1/get2,value2...

+	 * Constructs a URL that can be recognized by PRADO.

+	 * The actual construction work is done by the URL manager module.

+	 * This method may append session information to the generated URL if needed.

+	 * You may provide your own URL manager module by setting {@link setUrlManager UrlManager}

+	 * to provide your own URL scheme.

 	 * @param string service ID

 	 * @param string service parameter

 	 * @param array GET parameters, null if not needed

 	 * @param boolean whether to encode the ampersand in URL, defaults to true.

 	 * @param boolean whether to encode the GET parameters (their names and values), defaults to false.

 	 * @return string URL

-	 * @see parseUrl

+	 * @see TUrlManager::constructUrl

 	 */

 	public function constructUrl($serviceID,$serviceParam,$getItems=null,$encodeAmpersand=true,$encodeGetItems=true)

 	{

-		$url=$serviceID.'='.$serviceParam;

-		$amp=$encodeAmpersand?'&amp;':'&';

-		if(is_array($getItems) || $getItems instanceof Traversable)

-		{

-			if($encodeGetItems)

-			{

-				foreach($getItems as $name=>$value)

-				{

-					if(is_array($value))

-					{

-						$name=urlencode($name.'[]');

-						foreach($value as $v)

-							$url.=$amp.$name.'='.urlencode($v);

-					}

-					else

-						$url.=$amp.urlencode($name).'='.urlencode($value);

-				}

-			}

-			else

-			{

-				foreach($getItems as $name=>$value)

-				{

-					if(is_array($value))

-					{

-						foreach($value as $v)

-							$url.=$amp.$name.'[]='.$v;

-					}

-					else

-						$url.=$amp.$name.'='.$value;

-				}

-			}

-		}

-		if($this->getUrlFormat()===THttpRequestUrlFormat::Path)

-		{

-			$url=strtr($url,array($amp=>'/','?'=>'/','='=>$this->_separator));

-			if(defined('SID') && SID != '' && !((int)ini_get('session.use_cookies')===1 && ((int)ini_get('session.use_only_cookies')===1)))

-				$url.='?'.SID;

-			return $this->getApplicationUrl().'/'.$url;

-		}

+		$url=$this->_urlManager->constructUrl($serviceID,$serviceParam,$getItems,$encodeAmpersand,$encodeGetItems);

+		if(defined('SID') && SID != '' && !$this->_cookieOnly)

+			return $url . (strpos($url,'?')===false? '?' : ($encodeAmpersand?'&amp;':'&')) . SID;

 		else

-		{

-			if(defined('SID') && SID != '' && !((int)ini_get('session.use_cookies')===1 && ((int)ini_get('session.use_only_cookies')===1)))

-				$url.=$amp.SID;

-			return $this->getApplicationUrl().'?'.$url;

-		}

+			return $url;

 	}

 

 	/**

-	 * Parses the request URL and returns an array of input parameters (including GET variables).

-	 * This method is invoked when the URL format is Path.

+	 * Parses the request URL and returns an array of input parameters (excluding GET variables).

 	 * You may override this method to support customized URL format.

 	 * @return array list of input parameters, indexed by parameter names

-	 * @see constructUrl

+	 * @see TUrlManager::parseUrl

 	 */

 	protected function parseUrl()

 	{

-		if($this->_pathInfo!=='')

-		{

-			$paths=explode('/',$this->_pathInfo);

-			$getVariables=$_GET;

-			$serviceID=null;

-			foreach($paths as $path)

-			{

-				if(($path=trim($path))!=='')

-				{

-					if(($pos=strpos($path,$this->_separator))!==false)

-					{

-						$name=substr($path,0,$pos);

-						$value=substr($path,$pos+1);

-						if(($pos=strpos($name,'[]'))!==false)

-							$getVariables[substr($name,0,$pos)][]=$value;

-						else

-							$getVariables[$name]=$value;

-					}

-					else

-						$getVariables[$path]='';

-				}

-			}

-			return $getVariables;

-		}

-		else

-			return $_GET;

+		return $this->_urlManager->parseUrl();

 	}

 

 	/**

@@ -581,10 +570,11 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 * You may override this method to provide your own way of service resolution.

 	 * @see constructUrl

 	 */

-	protected function resolveRequest()

+	public function resolveRequest()

 	{

 		Prado::trace("Resolving request from ".$_SERVER['REMOTE_ADDR'],'System.Web.THttpRequest');

 		$this->_requestResolved=true;

+		$this->_items=array_merge($_GET,$this->parseUrl(),$_POST);

 		foreach($this->_services as $id)

 		{

 			if($this->contains($id))

@@ -625,8 +615,6 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 */

 	public function getServiceID()

 	{

-		if(!$this->_requestResolved)

-			$this->resolveRequest();

 		return $this->_serviceID;

 	}

 

@@ -644,8 +632,6 @@ class THttpRequest extends TApplicationComponent implements IteratorAggregate,Ar
 	 */

 	public function getServiceParameter()

 	{

-		if(!$this->_requestResolved)

-			$this->resolveRequest();

 		return $this->_serviceParam;

 	}

 

diff --git a/framework/Web/TUrlManager.php b/framework/Web/TUrlManager.php
new file mode 100644
index 00000000..d7938a47
--- /dev/null
+++ b/framework/Web/TUrlManager.php
@@ -0,0 +1,142 @@
+<?php

+/**

+ * TUrlManager class file

+ *

+ * @author Qiang Xue <qiang.xue@gmail.com>

+ * @link http://www.pradosoft.com/

+ * @copyright Copyright &copy; 2006 PradoSoft

+ * @license http://www.pradosoft.com/license/

+ * @version $Id $

+ * @package System.Web

+ */

+

+/**

+ * TUrlManager class

+ *

+ * TUrlManager is the base class for managing URLs that can be

+ * recognized by PRADO applications. It provides the default implementation

+ * for parsing and constructing URLs.

+ *

+ * Derived classes may override {@link constructUrl} and {@link parseUrl}

+ * to provide customized URL schemes.

+ *

+ * By default, {@link THttpRequest} uses TUrlManager as its URL manager.

+ * If you want to use your customized URL manager, load your manager class

+ * as an application module and set {@link THttpRequest::setUrlManager THttpRequest.UrlManager}

+ * with the ID of your URL manager module.

+ *

+ * @author Qiang Xue <qiang.xue@gmail.com>

+ * @version $Id $

+ * @package System.Web

+ * @since 3.0.6

+ */

+class TUrlManager extends TModule

+{

+	/**

+	 * Constructs a URL that can be recognized by PRADO.

+	 *

+	 * This method provides the actual implementation used by {@link THttpRequest::constructUrl}.

+	 * Override this method if you want to provide your own way of URL formatting.

+	 * If you do so, you may also need to override {@link parseUrl} so that the URL can be properly parsed.

+	 *

+	 * The URL is constructed as the following format:

+	 * /entryscript.php?serviceID=serviceParameter&get1=value1&...

+	 * If {@link THttpRequest::setUrlFormat THttpRequest.UrlFormat} is 'Path',

+	 * the following format is used instead:

+	 * /entryscript.php/serviceID/serviceParameter/get1,value1/get2,value2...

+	 * @param string service ID

+	 * @param string service parameter

+	 * @param array GET parameters, null if not provided

+	 * @param boolean whether to encode the ampersand in URL

+	 * @param boolean whether to encode the GET parameters (their names and values)

+	 * @return string URL

+	 * @see parseUrl

+	 */

+	public function constructUrl($serviceID,$serviceParam,$getItems,$encodeAmpersand,$encodeGetItems)

+	{

+		$url=$serviceID.'='.$serviceParam;

+		$amp=$encodeAmpersand?'&amp;':'&';

+		$request=$this->getRequest();

+		if(is_array($getItems) || $getItems instanceof Traversable)

+		{

+			if($encodeGetItems)

+			{

+				foreach($getItems as $name=>$value)

+				{

+					if(is_array($value))

+					{

+						$name=urlencode($name.'[]');

+						foreach($value as $v)

+							$url.=$amp.$name.'='.urlencode($v);

+					}

+					else

+						$url.=$amp.urlencode($name).'='.urlencode($value);

+				}

+			}

+			else

+			{

+				foreach($getItems as $name=>$value)

+				{

+					if(is_array($value))

+					{

+						foreach($value as $v)

+							$url.=$amp.$name.'[]='.$v;

+					}

+					else

+						$url.=$amp.$name.'='.$value;

+				}

+			}

+		}

+		if($request->getUrlFormat()===THttpRequestUrlFormat::Path)

+			return $request->getApplicationUrl().'/'.strtr($url,array($amp=>'/','?'=>'/','='=>$request->getUrlParamSeparator()));

+		else

+			return $request->getApplicationUrl().'?'.$url;

+	}

+

+	/**

+	 * Parses the request URL and returns an array of input parameters.

+	 * This mehtod is automatically invoked by {@link THttpRequest} when

+	 * handling a user request.

+	 *

+	 * In general, this method should parse the path info part of the requesting URL

+	 * and generate an array of name-value pairs according to some scheme.

+	 * The current implementation deals with both 'Get' and 'Path' URL formats.

+	 *

+	 * You may override this method to support customized URL format.

+	 * @return array list of input parameters, indexed by parameter names

+	 * @see constructUrl

+	 */

+	public function parseUrl()

+	{

+		$request=$this->getRequest();

+		$pathInfo=trim($request->getPathInfo(),'/');

+		if($request->getUrlFormat()===THttpRequestUrlFormat::Path && $pathInfo!=='')

+		{

+			$separator=$request->getUrlParamSeparator();

+			$paths=explode('/',$pathInfo);

+			$getVariables=array();

+			foreach($paths as $path)

+			{

+				if(($path=trim($path))!=='')

+				{

+					if(($pos=strpos($path,$separator))!==false)

+					{

+						$name=substr($path,0,$pos);

+						$value=substr($path,$pos+1);

+						if(($pos=strpos($name,'[]'))!==false)

+							$getVariables[substr($name,0,$pos)][]=$value;

+						else

+							$getVariables[$name]=$value;

+					}

+					else

+						$getVariables[$path]='';

+				}

+			}

+			return $getVariables;

+		}

+		else

+			return array();

+	}

+}

+

+?>
\ No newline at end of file
diff --git a/framework/Web/TUrlMapping.php b/framework/Web/TUrlMapping.php
index 6b47652c..50fe9f18 100644
--- a/framework/Web/TUrlMapping.php
+++ b/framework/Web/TUrlMapping.php
@@ -10,6 +10,8 @@
  * @package System.Web

  */

 

+Prado::using('System.Web.TUrlManager');

+

 /**

  * TUrlMapping Class

  *

@@ -17,14 +19,13 @@
  * particular service and page class. This module must be configured

  * before a service is initialized, thus this module should be configured

  * globally in the <tt>application.xml</tt> file and before any services.

- *

- * The mapping format is as follows.

  * <code>

  *  <module id="friendly-url" class="System.Web.TUrlMapping">

  *    <url ServiceParameter="Posts.ViewPost" pattern="post/{id}/?" parameters.id="\d+" />

  *    <url ServiceParameter="Posts.ListPost" pattern="archive/{time}/?" parameters.time="\d{6}" />

  *    <url ServiceParameter="Posts.ListPost" pattern="category/{cat}/?" parameters.cat="\d+" />

  *  </module>

+ *  <module id="request" class="THttpRequest" UrlManager="friendly-url" />

  * </code>

  *

  * See {@link TUrlMappingPattern} for details regarding the mapping patterns.

@@ -38,14 +39,22 @@
  * The mapping can be load from an external file by specifying a configuration

  * file using the {@link setConfigFile ConfigFile} property.

  *

+ * Since TUrlMapping is a URL manager extending from {@link TUrlManager},

+ * you may override {@link TUrlManager::constructUrl} to support your pattern-based

+ * URL scheme.

+ *

  * @author Wei Zhuo <weizhuo[at]gmail[dot]com>

  * @version $Id$

  * @package System.Web

  * @since 3.0.5

  */

-class TUrlMapping extends TModule

+class TUrlMapping extends TUrlManager

 {

 	/**

+	 * File extension of external configuration file

+	 */

+	const CONFIG_FILE_EXT='.xml';

+	/**

 	 * @var string default pattern class.

 	 */

 	private $_defaultPatternClass='TUrlMappingPattern';

@@ -58,10 +67,6 @@ class TUrlMapping extends TModule
 	 */

 	private $_matched;

 	/**

-	 * File extension of external configuration file

-	 */

-	const CONFIG_FILE_EXT='.xml';

-	/**

 	 * @var string external configuration file

 	 */

 	private $_configFile=null;

@@ -74,12 +79,12 @@ class TUrlMapping extends TModule
 	 */

 	public function init($xml)

 	{

+		parent::init($xml);

 		if($this->getRequest()->getRequestResolved())

 			throw new TConfigurationException('urlpath_dispatch_module_must_be_global');

 		if($this->_configFile!==null)

 			$this->loadConfigFile();

 		$this->loadUrlMappings($xml);

-		$this->resolveMappings();

 	}

 

 	/**

@@ -142,10 +147,14 @@ class TUrlMapping extends TModule
 	}

 

 	/**

-	 * Using the request URL path, find the first matching pattern. If found

-	 * the matched pattern parameters are used in the Request object.

+	 * Parses the request URL and returns an array of input parameters.

+	 * This method overrides the parent implementation.

+	 * The input parameters do not include GET and POST variables.

+	 * This method uses the request URL path to find the first matching pattern. If found

+	 * the matched pattern parameters are used to return as the input parameters.

+	 * @return array list of input parameters

 	 */

-	protected function resolveMappings()

+	public function parseUrl()

 	{

 		$url = $this->getRequest()->getUrl();

 		foreach($this->_patterns as $pattern)

@@ -153,12 +162,16 @@ class TUrlMapping extends TModule
 			$matches = $pattern->getPatternMatches($url);

 			if(count($matches) > 0)

 			{

-				$this->changeServiceParameters($pattern);

-				$this->initializeRequestParameters($matches);

 				$this->_matched=$pattern;

-				break;

+				$this->changeServiceParameters($pattern);

+				$params=array();

+				foreach($matches as $key=>$value)

+					if(is_string($key))

+						$params[$key]=$value;

+				return $params;

 			}

 		}

+		return array();

 	}

 

 	/**

@@ -170,19 +183,6 @@ class TUrlMapping extends TModule
 	}

 

 	/**

-	 * @param array initialize the Request with matched parameters.

-	 */

-	protected function initializeRequestParameters($matches)

-	{

-		$request = $this->getRequest();

-		foreach($matches as $k => $v)

-		{

-			if(!is_int($k))

-				$request->add($k,$v);

-		}

-	}

-

-	/**

 	 * @param TUrlMappingPattern change the Request service ID and page class.

 	 */

 	protected function changeServiceParameters($pattern)