/**
  * serialize
  *
  * @param DAV\Server $server
  * @param \DOMElement $prop
  * @return void
  */
 public function serialize(DAV\Server $server, \DOMElement $prop)
 {
     $doc = $prop->ownerDocument;
     //$prop->setAttribute('xmlns:b','urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/');
     //$prop->setAttribute('b:dt','dateTime.rfc1123');
     $prop->nodeValue = HTTP\Util::toHTTPDate($this->time);
 }
示例#2
0
 /**
  * This method checks the main HTTP preconditions.
  *
  * Currently these are:
  *   * If-Match
  *   * If-None-Match
  *   * If-Modified-Since
  *   * If-Unmodified-Since
  *
  * The method will return true if all preconditions are met
  * The method will return false, or throw an exception if preconditions
  * failed. If false is returned the operation should be aborted, and
  * the appropriate HTTP response headers are already set.
  *
  * Normally this method will throw 412 Precondition Failed for failures
  * related to If-None-Match, If-Match and If-Unmodified Since. It will
  * set the status to 304 Not Modified for If-Modified_since.
  *
  * If the $handleAsGET argument is set to true, it will also return 304
  * Not Modified for failure of the If-None-Match precondition. This is the
  * desired behaviour for HTTP GET and HTTP HEAD requests.
  *
  * @param bool $handleAsGET
  * @return bool
  */
 public function checkPreconditions($handleAsGET = false)
 {
     $uri = $this->getRequestUri();
     $node = null;
     $lastMod = null;
     $etag = null;
     if ($ifMatch = $this->httpRequest->getHeader('If-Match')) {
         // If-Match contains an entity tag. Only if the entity-tag
         // matches we are allowed to make the request succeed.
         // If the entity-tag is '*' we are only allowed to make the
         // request succeed if a resource exists at that url.
         try {
             $node = $this->tree->getNodeForPath($uri);
         } catch (Exception\NotFound $e) {
             throw new Exception\PreconditionFailed('An If-Match header was specified and the resource did not exist', 'If-Match');
         }
         // Only need to check entity tags if they are not *
         if ($ifMatch !== '*') {
             // There can be multiple etags
             $ifMatch = explode(',', $ifMatch);
             $haveMatch = false;
             foreach ($ifMatch as $ifMatchItem) {
                 // Stripping any extra spaces
                 $ifMatchItem = trim($ifMatchItem, ' ');
                 $etag = $node->getETag();
                 if ($etag === $ifMatchItem) {
                     $haveMatch = true;
                 } else {
                     // Evolution has a bug where it sometimes prepends the "
                     // with a \. This is our workaround.
                     if (str_replace('\\"', '"', $ifMatchItem) === $etag) {
                         $haveMatch = true;
                     }
                 }
             }
             if (!$haveMatch) {
                 throw new Exception\PreconditionFailed('An If-Match header was specified, but none of the specified the ETags matched.', 'If-Match');
             }
         }
     }
     if ($ifNoneMatch = $this->httpRequest->getHeader('If-None-Match')) {
         // The If-None-Match header contains an etag.
         // Only if the ETag does not match the current ETag, the request will succeed
         // The header can also contain *, in which case the request
         // will only succeed if the entity does not exist at all.
         $nodeExists = true;
         if (!$node) {
             try {
                 $node = $this->tree->getNodeForPath($uri);
             } catch (Exception\NotFound $e) {
                 $nodeExists = false;
             }
         }
         if ($nodeExists) {
             $haveMatch = false;
             if ($ifNoneMatch === '*') {
                 $haveMatch = true;
             } else {
                 // There might be multiple etags
                 $ifNoneMatch = explode(',', $ifNoneMatch);
                 $etag = $node->getETag();
                 foreach ($ifNoneMatch as $ifNoneMatchItem) {
                     // Stripping any extra spaces
                     $ifNoneMatchItem = trim($ifNoneMatchItem, ' ');
                     if ($etag === $ifNoneMatchItem) {
                         $haveMatch = true;
                     }
                 }
             }
             if ($haveMatch) {
                 if ($handleAsGET) {
                     $this->httpResponse->sendStatus(304);
                     return false;
                 } else {
                     throw new Exception\PreconditionFailed('An If-None-Match header was specified, but the ETag matched (or * was specified).', 'If-None-Match');
                 }
             }
         }
     }
     if (!$ifNoneMatch && ($ifModifiedSince = $this->httpRequest->getHeader('If-Modified-Since'))) {
         // The If-Modified-Since header contains a date. We
         // will only return the entity if it has been changed since
         // that date. If it hasn't been changed, we return a 304
         // header
         // Note that this header only has to be checked if there was no If-None-Match header
         // as per the HTTP spec.
         $date = HTTP\Util::parseHTTPDate($ifModifiedSince);
         if ($date) {
             if (is_null($node)) {
                 $node = $this->tree->getNodeForPath($uri);
             }
             $lastMod = $node->getLastModified();
             if ($lastMod) {
                 $lastMod = new \DateTime('@' . $lastMod);
                 if ($lastMod <= $date) {
                     $this->httpResponse->sendStatus(304);
                     $this->httpResponse->setHeader('Last-Modified', HTTP\Util::toHTTPDate($lastMod));
                     return false;
                 }
             }
         }
     }
     if ($ifUnmodifiedSince = $this->httpRequest->getHeader('If-Unmodified-Since')) {
         // The If-Unmodified-Since will allow allow the request if the
         // entity has not changed since the specified date.
         $date = HTTP\Util::parseHTTPDate($ifUnmodifiedSince);
         // We must only check the date if it's valid
         if ($date) {
             if (is_null($node)) {
                 $node = $this->tree->getNodeForPath($uri);
             }
             $lastMod = $node->getLastModified();
             if ($lastMod) {
                 $lastMod = new \DateTime('@' . $lastMod);
                 if ($lastMod > $date) {
                     throw new Exception\PreconditionFailed('An If-Unmodified-Since header was specified, but the entity has been changed since the specified date.', 'If-Unmodified-Since');
                 }
             }
         }
     }
     return true;
 }