diff options
| author | xue <> | 2005-12-21 19:17:25 +0000 |
|---|---|---|
| committer | xue <> | 2005-12-21 19:17:25 +0000 |
| commit | 6960f40252533b7e286465c27fa810b3c3213e72 (patch) | |
| tree | 205f30d23ecc7090f0d39fb8724d7682ff3f39e5 /framework/Web/UI/TPageStatePersister.php | |
| parent | 7f644982bb7193fa33763e1b0660776e02f4159d (diff) | |
Changed THiddenFieldPageStatePersister to TPageStatePersister. Changed the way of generating private key (previously it was not fully implemented yet.)
Diffstat (limited to 'framework/Web/UI/TPageStatePersister.php')
| -rw-r--r-- | framework/Web/UI/TPageStatePersister.php | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/framework/Web/UI/TPageStatePersister.php b/framework/Web/UI/TPageStatePersister.php new file mode 100644 index 00000000..0718c492 --- /dev/null +++ b/framework/Web/UI/TPageStatePersister.php @@ -0,0 +1,89 @@ +<?php
+
+class TPageStatePersister extends TModule implements IPageStatePersister
+{
+ private $_application;
+ private $_privateKey=null;
+
+ /**
+ * Initializes the service.
+ * This method is required by IModule interface.
+ * @param TApplication application
+ * @param TXmlElement module configuration
+ */
+ public function init($application, $config)
+ {
+ parent::init($application,$config);
+ $this->_application=$application;
+ $application->getService()->setPageStatePersister($this);
+ }
+
+ public function save($state)
+ {
+ $data=Prado::serialize($state);
+ $hmac=$this->computeHMAC($data,$this->getPrivateKey());
+ if(extension_loaded('zlib'))
+ $data=gzcompress($hmac.$data);
+ else
+ $data=$hmac.$data;
+ $this->_application->getService()->getRequestedPage()->getClientScript()->registerHiddenField(TPage::FIELD_PAGESTATE,base64_encode($data));
+ }
+
+ public function load()
+ {
+ $str=base64_decode($this->_application->getRequest()->getItems()->itemAt(TPage::FIELD_PAGESTATE));
+ if($str==='')
+ return null;
+ if(extension_loaded('zlib'))
+ $data=gzuncompress($str);
+ else
+ $data=$str;
+ if($data!==false && strlen($data)>32)
+ {
+ $hmac=substr($data,0,32);
+ $state=substr($data,32);
+ if($hmac===$this->computeHMAC($state,$this->getPrivateKey()))
+ return Prado::unserialize($state);
+ }
+ throw new TInvalidDataValueException('pagestatepersister_viewstate_corrupted.');
+ }
+
+ protected function generatePrivateKey()
+ {
+ $v1=rand();
+ $v2=rand();
+ $v3=rand();
+ return md5("$v1$v2$v3");
+ }
+
+ public function getPrivateKey()
+ {
+ if(empty($this->_privateKey))
+ {
+ if(($this->_privateKey=$this->_application->getGlobalState('prado:pagestatepersister:privatekey'))===null)
+ {
+ $this->_privateKey=$this->generatePrivateKey();
+ $this->_application->setGlobalState('prado:pagestatepersister:privatekey',$this->_privateKey,null);
+ }
+ }
+ return $this->_privateKey;
+ }
+
+ public function setPrivateKey($value)
+ {
+ if(strlen($value)<8)
+ throw new TConfigurationException('pagestatepersister_privatekey_invalid');
+ $this->_privateKey=$value;
+ }
+
+ private function computeHMAC($data,$key)
+ {
+ if (strlen($key) > 64)
+ $key = pack('H32', md5($key));
+ else if (strlen($key) < 64)
+ $key = str_pad($key, 64, "\0");
+ return md5((str_repeat("\x5c", 64) ^ substr($key, 0, 64)) . pack('H32', md5((str_repeat("\x36", 64) ^ substr($key, 0, 64)) . $data)));
+ }
+}
+
+?>
\ No newline at end of file |