* @link http://www.pradosoft.com/
* @copyright Copyright © 2006 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Web
*/
Prado::using('System.Web.TUrlManager');
Prado::using('System.Collections.TAttributeCollection');
/**
* TUrlMapping Class
*
* The TUrlMapping module allows aributary URL path to be mapped to a
* particular service and page class. This module must be configured
* before a service is initialized, thus this module should be configured
* globally in the application.xml file and before any services.
*
*
*
*
*
*
*
*
*
* See {@link TUrlMappingPattern} for details regarding the mapping patterns.
* Similar to other modules, the <url /> configuration class
* can be customised using the class property.
*
* The URL mapping are evaluated in order, only the first mapping that matches
* the URL will be used. Cascaded mapping can be achieved by placing the URL mappings
* in particular order. For example, placing the most specific mappings first.
*
* The mapping can be loaded 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.
*
* From PRADO v3.1.1, TUrlMapping also provides support to construct URLs according to
* the specified the pattern. You may enable this functionality by setting {@link setEnableCustomUrl EnableCustomUrl} to true.
* When you call THttpRequest::constructUrl() (or via TPageService::constructUrl()),
* TUrlMapping will examine the available URL mapping patterns using their {@link getServiceParameter ServiceParameter}
* and {@link getPattern Pattern} properties. A pattern is applied if its
* {@link getServiceParameter ServiceParameter} matches the service parameter passed
* to constructUrl() and every parameter in the {@link getPattern Pattern} is found
* in the GET variables.
*
* @author Wei Zhuo
* @version $Id$
* @package System.Web
* @since 3.0.5
*/
class TUrlMapping extends TUrlManager
{
/**
* File extension of external configuration file
*/
const CONFIG_FILE_EXT='.xml';
/**
* @var TUrlMappingPattern[] list of patterns.
*/
private $_patterns=array();
/**
* @var TUrlMappingPattern matched pattern.
*/
private $_matched;
/**
* @var string external configuration file
*/
private $_configFile=null;
/**
* @var boolean whether to enable custom contructUrl
*/
private $_customUrl=false;
/**
* @var array rules for constructing URLs
*/
private $_constructRules=array();
private $_urlPrefix='';
private $_defaultMappingClass='TUrlMappingPattern';
/**
* Initializes this module.
* This method is required by the IModule interface.
* @param TXmlElement configuration for this module, can be null
* @throws TConfigurationException if module is configured in the global scope.
*/
public function init($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);
if($this->_urlPrefix==='')
$this->_urlPrefix=$this->getRequest()->getApplicationUrl();
$this->_urlPrefix=rtrim($this->_urlPrefix,'/');
}
/**
* Initialize the module from configuration file.
* @throws TConfigurationException if {@link getConfigFile ConfigFile} is invalid.
*/
protected function loadConfigFile()
{
if(is_file($this->_configFile))
{
$dom=new TXmlDocument;
$dom->loadFromFile($this->_configFile);
$this->loadUrlMappings($dom);
}
else
throw new TConfigurationException(
'urlpath_dispatch_configfile_invalid',$this->_configFile);
}
/**
* Returns a value indicating whether to enable custom constructUrl.
* If true, constructUrl() will make use of the URL mapping rules to
* construct valid URLs.
* @return boolean whether to enable custom constructUrl. Defaults to false.
*/
public function getEnableCustomUrl()
{
return $this->_customUrl;
}
/**
* Sets a value indicating whether to enable custom constructUrl.
* If true, constructUrl() will make use of the URL mapping rules to
* construct valid URLs.
* @param boolean whether to enable custom constructUrl.
*/
public function setEnableCustomUrl($value)
{
$this->_customUrl=TPropertyValue::ensureBoolean($value);
}
/**
* @return string the part that will be prefixed to the constructed URLs. Defaults to the requested script path (e.g. /path/to/index.php for a URL http://hostname/path/to/index.php)
*/
public function getUrlPrefix()
{
return $this->_urlPrefix;
}
/**
* @param string the part that will be prefixed to the constructed URLs. This is used by constructUrl() when EnableCustomUrl is set true.
* @see getUrlPrefix
*/
public function setUrlPrefix($value)
{
$this->_urlPrefix=$value;
}
/**
* @return string external configuration file. Defaults to null.
*/
public function getConfigFile()
{
return $this->_configFile;
}
/**
* @param string external configuration file in namespace format. The file
* must be suffixed with '.xml'.
* @throws TInvalidDataValueException if the file is invalid.
*/
public function setConfigFile($value)
{
if(($this->_configFile=Prado::getPathOfNamespace($value,self::CONFIG_FILE_EXT))===null)
throw new TConfigurationException('urlpath_configfile_invalid',$value);
}
/**
* @return string the default class of URL mapping patterns. Defaults to TUrlMappingPattern.
* @since 3.1.1
*/
public function getDefaultMappingClass()
{
return $this->_defaultMappingClass;
}
/**
* Sets the default class of URL mapping patterns.
* When a URL matching pattern does not specify "class" attribute, it will default to the class
* specified by this property. You may use either a class name or a namespace format of class (if the class needs to be included first.)
* @param string the default class of URL mapping patterns.
* @since 3.1.1
*/
public function setDefaultMappingClass($value)
{
$this->_defaultMappingClass=$value;
}
/**
* Load and configure each url mapping pattern.
* @param TXmlElement configuration node
* @throws TConfigurationException if specific pattern class is invalid
*/
protected function loadUrlMappings($xml)
{
foreach($xml->getElementsByTagName('url') as $url)
{
$properties=$url->getAttributes();
if(($class=$properties->remove('class'))===null)
$class=$this->getDefaultMappingClass();
$pattern = Prado::createComponent($class,$this);
if(!($pattern instanceof TUrlMappingPattern))
throw new TConfigurationException('urlmapping_urlmappingpattern_required');
foreach($properties as $name=>$value)
$pattern->setSubproperty($name,$value);
$this->_patterns[] = $pattern;
$pattern->init($url);
$key=$pattern->getServiceID().':'.$pattern->getServiceParameter();
$this->_constructRules[$key][]=$pattern;
}
}
/**
* 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
*/
public function parseUrl()
{
$url = $this->getRequest()->getUrl();
foreach($this->_patterns as $pattern)
{
$matches = $pattern->getPatternMatches($url);
if(count($matches) > 0)
{
$this->_matched=$pattern;
$params=array();
foreach($matches as $key=>$value)
if(is_string($key))
$params[$key]=$value;
$params[$pattern->getServiceID()]=$pattern->getServiceParameter();
return $params;
}
}
return parent::parseUrl();
}
/**
* Constructs a URL that can be recognized by PRADO.
*
* This method provides the actual implementation used by {@link THttpRequest::constructUrl}.
* Override this method if you want to provide your own way of URL formatting.
* If you do so, you may also need to override {@link parseUrl} so that the URL can be properly parsed.
*
* The URL is constructed as the following format:
* /entryscript.php?serviceID=serviceParameter&get1=value1&...
* If {@link THttpRequest::setUrlFormat THttpRequest.UrlFormat} is 'Path',
* the following format is used instead:
* /entryscript.php/serviceID/serviceParameter/get1,value1/get2,value2...
* @param string service ID
* @param string service parameter
* @param array GET parameters, null if not provided
* @param boolean whether to encode the ampersand in URL
* @param boolean whether to encode the GET parameters (their names and values)
* @return string URL
* @see parseUrl
* @since 3.1.1
*/
public function constructUrl($serviceID,$serviceParam,$getItems,$encodeAmpersand,$encodeGetItems)
{
if(!$this->_customUrl || !(is_array($getItems) || ($getItems instanceof Traversable)))
return parent::constructUrl($serviceID,$serviceParam,$getItems,$encodeAmpersand,$encodeGetItems);
$key=$serviceID.':'.$serviceParam;
if(isset($this->_constructRules[$key]))
{
foreach($this->_constructRules[$key] as $rule)
{
if($rule->supportCustomUrl($getItems))
return $rule->constructUrl($getItems,$encodeAmpersand,$encodeGetItems);
}
}
return parent::constructUrl($serviceID,$serviceParam,$getItems,$encodeAmpersand,$encodeGetItems);
}
/**
* @return TUrlMappingPattern the matched pattern, null if not found.
*/
public function getMatchingPattern()
{
return $this->_matched;
}
}
/**
* URL Mapping Pattern Class
*
* Describes an URL mapping pattern, if a given URL matches the pattern, the
* TUrlMapping class will alter the THttpRequest parameters. The
* url matching is done using patterns and regular expressions.
*
* The {@link setPattern Pattern} property takes an string expression with
* parameter names enclosed between a left brace '{' and a right brace '}'.
* The patterns for each parameter can be set using {@link getParameters Parameters}
* attribute collection. For example
*
*
*
*
* In the above example, the pattern contains 3 parameters named "year",
* "month" and "day". The pattern for these parameters are, respectively,
* "\d{4}" (4 digits), "\d{2}" (2 digits) and "\d+" (1 or more digits).
* Essentially, the Parameters attribute name and values are used
* as substrings in replacing the placeholders in the Pattern string
* to form a complete regular expression string. A full regular expression
* may be expressed using the RegularExpression attribute or
* as the body content of the <module> tag. The above pattern is equivalent
* to the following regular expression pattern.
*
* /articles\/(?P\d{4})\/(?P\d{2})\/(?P\d+)/u
*
* The above regular expression used the "named group" feature available in PHP.
* Notice that you need to escape the slash in regular expressions.
*
* In the TUrlMappingPattern class, the pattern is matched against the
* path property of the url only.
*
* Thus, only an url that matches the pattern will be valid. For example,
* an url "http://example.com/articles/2006/07/21" will matches and is valid.
* However, "http://example.com/articles/2006/07/hello" is not
* valid since the "day" parameter pattern is not satisfied.
*
* The parameter values are available through the standard Request
* object. For example, $this->Request['year'].
*
* The {@link setServiceParameter ServiceParameter} and {@link setServiceID ServiceID}
* (the default ID is 'page') set the service parameter and service id respectively.
* The service parameter for the TPageService is the Page class name, other service
* may use the service parameter differently.
*
* For more complicated mappings, the body of the <url>
* can be used to specify the mapping pattern.
*
* @author Wei Zhuo
* @version $Id$
* @package System.Web
* @since 3.0.5
*/
class TUrlMappingPattern extends TComponent
{
/**
* @var string service parameter such as Page class name.
*/
private $_serviceParameter;
/**
* @var string service ID, default is 'page'.
*/
private $_serviceID='page';
/**
* @var string url pattern to match.
*/
private $_pattern='';
/**
* @var TMap parameter regular expressions.
*/
private $_parameters;
/**
* @var string regular expression pattern.
*/
private $_regexp='';
/**
* @var boolean case sensitive matching, default is true
*/
private $_caseSensitive=true;
private $_customUrl=true;
private $_manager;
public function __construct(TUrlManager $manager)
{
$this->_manager=$manager;
$this->_parameters=new TAttributeCollection;
$this->_parameters->setCaseSensitive(true);
}
public function getManager()
{
return $this->_manager;
}
/**
* Initialize the pattern, uses the body content as pattern is available.
* @param TXmlElement configuration for this module.
* @throws TConfigurationException if page class is not specified.
*/
public function init($config)
{
if(($body=trim($config->getValue()))!=='')
$this->setRegularExpression($body);
if($this->_serviceParameter===null)
throw new TConfigurationException('urlmappingpattern_serviceparameter_required', $this->getPattern());
}
/**
* Substitute the parameter key value pairs as named groupings
* in the regular expression matching pattern.
* @return string regular expression pattern with parameter subsitution
*/
protected function getParameterizedPattern()
{
$params= array();
$values = array();
foreach($this->parameters as $key => $value)
{
$params[] = '{'.$key.'}';
$values[] = '(?P<'.$key.'>'.$value.')';
}
$params[] = '/';
$values[] = '\\/';
$regexp = str_replace($params,$values,$this->getPattern());
$modifiers = $this->getModifiers();
return '/'.$regexp.'/'.$modifiers;
}
/**
* @return string full regular expression mapping pattern
*/
public function getRegularExpression()
{
return $this->_regexp;
}
/**
* @param string full regular expression mapping pattern.
*/
public function setRegularExpression($value)
{
$this->_regexp=$value;
}
/**
* @param string service parameter, such as page class name.
*/
public function setServiceParameter($value)
{
$this->_serviceParameter=$value;
}
/**
* @return string service parameter, such as page class name.
*/
public function getServiceParameter()
{
return $this->_serviceParameter;
}
/**
* @param string service id to handle.
*/
public function setServiceID($value)
{
$this->_serviceID=$value;
}
/**
* @return string service id.
*/
public function getServiceID()
{
return $this->_serviceID;
}
/**
* @return string url pattern to match. Defaults to ''.
*/
public function getPattern()
{
return $this->_pattern;
}
/**
* @param string url pattern to match.
*/
public function setPattern($value)
{
$this->_pattern = $value;
}
/**
* @param boolean case sensitive pattern matching, default is true.
*/
public function setCaseSensitive($value)
{
$this->_caseSensitive=TPropertyValue::ensureBoolean($value);
}
/**
* @return boolean case sensitive pattern matching, default is true.
*/
public function getCaseSensitive()
{
return $this->_caseSensitive;
}
/**
* @return TAttributeCollection parameter key value pairs.
*/
public function getParameters()
{
return $this->_parameters;
}
/**
* @param TAttributeCollection new parameter key value pairs.
*/
public function setParameters($value)
{
$this->_parameters=$value;
}
/**
* Uses URL pattern (or full regular expression if available) to
* match the given url path.
* @param TUri url to match against
* @return array matched parameters, empty if no matches.
*/
public function getPatternMatches($url)
{
$matches=array();
if(($pattern=$this->getRegularExpression())==='')
$pattern=$this->getParameterizedPattern();
preg_match($pattern,$url->getPath(),$matches);
return $matches;
}
/**
* @return string regular expression matching modifiers.
*/
protected function getModifiers()
{
$modifiers = 'u';
if(!$this->getCaseSensitive())
$modifiers .= 'i';
return $modifiers;
}
/**
* Returns a value indicating whether to use this pattern to construct URL.
* @return boolean whether to enable custom constructUrl. Defaults to true.
* @since 3.1.1
*/
public function getEnableCustomUrl()
{
return $this->_customUrl;
}
/**
* Sets a value indicating whether to enable custom constructUrl using this pattern
* @param boolean whether to enable custom constructUrl.
*/
public function setEnableCustomUrl($value)
{
$this->_customUrl=TPropertyValue::ensureBoolean($value);
}
/**
* @param array list of GET items to be put in the constructed URL
* @return boolean whether this pattern IS the one for constructing the URL with the specified GET items.
* @since 3.1.1
*/
public function supportCustomUrl($getItems)
{
if(!$this->_customUrl || $this->getPattern()==='')
return false;
foreach($this->_parameters as $key=>$value)
if(!isset($getItems[$key]))
return false;
return true;
}
/**
* Constructs a URL using this pattern.
* @param array list of GET variables
* @param boolean whether the ampersand should be encoded in the constructed URL
* @param boolean whether the GET variables should be encoded in the constructed URL
* @return string the constructed URL
* @since 3.1.1
*/
public function constructUrl($getItems,$encodeAmpersand,$encodeGetItems)
{
$extra=array();
$replace=array();
// for the GET variables matching the pattern, put them in the URL path
foreach($getItems as $key=>$value)
{
if($encodeGetItems)
$value=urlencode($value);
if($this->_parameters->contains($key))
$replace['{'.$key.'}']=$value;
else
$extra[$key]=$value;
}
$url=$this->_manager->getUrlPrefix().'/'.trim(strtr($this->getPattern(),$replace),'/');
// for the rest of the GET variables, put them in the query string
if(count($extra)>0)
{
$url2='';
$amp=$encodeAmpersand?'&':'&';
if($encodeGetItems)
{
foreach($extra as $name=>$value)
{
if(is_array($value))
{
$name=urlencode($name.'[]');
foreach($value as $v)
$url2.=$amp.$name.'='.urlencode($v);
}
else
$url2.=$amp.urlencode($name).'='.urlencode($value);
}
}
else
{
foreach($extra as $name=>$value)
{
if(is_array($value))
{
foreach($value as $v)
$url2.=$amp.$name.'[]='.$v;
}
else
$url2.=$amp.$name.'='.$value;
}
}
$url=$url.'?'.substr($url2,strlen($amp));
}
return $url;
}
}
?>