diff --git a/libgrive/src/drive/CommonUri.hh b/libgrive/src/drive/CommonUri.hh
new file mode 100644
index 0000000..dd619d7
--- /dev/null
+++ b/libgrive/src/drive/CommonUri.hh
@@ -0,0 +1,27 @@
+/*
+	grive: an GPL program to sync a local directory with Google Drive
+	Copyright (C) 2012  Wan Wai Ho
+
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General Public License
+	as published by the Free Software Foundation version 2
+	of the License.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+#pragma once
+
+#include <string>
+
+namespace gr
+{
+	const std::string root_url = "https://docs.google.com/feeds/default/private/full" ;
+}
diff --git a/libgrive/src/drive/Drive.cc b/libgrive/src/drive/Drive.cc
index 219e033..76a1501 100644
--- a/libgrive/src/drive/Drive.cc
+++ b/libgrive/src/drive/Drive.cc
@@ -19,6 +19,7 @@
 
 #include "Drive.hh"
 
+#include "CommonUri.hh"
 #include "File.hh"
 
 #include "http/HTTP.hh"
@@ -44,8 +45,6 @@
 
 namespace gr {
 
-const std::string root_url = "https://docs.google.com/feeds/default/private/full" ;
-
 Drive::Drive( OAuth2& auth ) :
 	m_auth( auth ),
 	m_root( ".", "https://docs.google.com/feeds/default/private/full/folder%3Aroot" )
diff --git a/libgrive/src/drive/File.cc b/libgrive/src/drive/File.cc
index 71777b0..5154e46 100644
--- a/libgrive/src/drive/File.cc
+++ b/libgrive/src/drive/File.cc
@@ -19,6 +19,8 @@
 
 #include "File.hh"
 
+#include "CommonUri.hh"
+
 #include "http/Download.hh"
 #include "http/StringResponse.hh"
 #include "http/XmlResponse.hh"
@@ -47,12 +49,17 @@ File::File( const Json& entry )
 void File::Update( const Json& entry )
 {
 	m_title				= entry["title"]["$t"].Str() ;
-	m_filename			= entry["docs$suggestedFilename"]["$t"].Str() ;
+	
+	m_filename			= entry.Has("docs$suggestedFilename") ?
+		entry["docs$suggestedFilename"]["$t"].Str() : "" ;
+	
 	m_href				= entry["content"]["src"].Str() ;
 	m_parent			= Parent( entry ) ;
 	m_server_modified	= DateTime( entry["updated"]["$t"].Str() ) ;
 	m_etag				= entry["gd$etag"].Str() ;
 	
+	m_resource_id		= entry["gd$resourceId"]["$t"].Str() ;
+	
 	m_server_md5		= entry.Has("docs$md5Checksum") ?
 		entry["docs$md5Checksum"]["$t"].Str() : "" ;
 
@@ -171,4 +178,25 @@ std::cout << xml.Response() << std::endl ;
 	return true ;
 }
 
+std::string File::ResourceID() const
+{
+	return m_resource_id ;
+}
+
+std::string File::ETag() const
+{
+	return m_etag ;
+}
+
+void File::Delete( http::Agent *http, const http::Headers& auth )
+{
+	http::Headers hdr( auth ) ;
+	hdr.push_back( "If-Match: " + m_etag ) ;
+	
+std::cout << root_url + "/" + m_resource_id + "?delete=true" << std::endl ;
+	
+	http::StringResponse str ;
+	http->Custom( "DELETE", root_url + "/" + m_resource_id + "?delete=true", &str, hdr ) ;
+}
+
 } // end of namespace
diff --git a/libgrive/src/drive/File.hh b/libgrive/src/drive/File.hh
index 6537ff6..f4b673f 100644
--- a/libgrive/src/drive/File.hh
+++ b/libgrive/src/drive/File.hh
@@ -44,12 +44,16 @@ public :
 	std::string ServerMD5() const ;
 	DateTime ServerModified() const ;
 	
+	std::string ResourceID() const ;
+	std::string ETag() const ;
+	
 	std::string Href() const ;
 	std::string Parent() const ;
 	
 	void Download( const Path& file, const http::Headers& auth ) const ;
 	bool Upload( std::streambuf *file, const http::Headers& auth ) ;
-
+	void Delete( gr::http::Agent* http, const gr::http::Headers& auth ) ;
+	
 private :
 	void Update( const Json& entry ) ;
 	static std::string Parent( const Json& entry ) ;
@@ -60,6 +64,7 @@ private :
 	std::string		m_kind ;
 	std::string		m_server_md5 ;
 	std::string		m_etag ;
+	std::string		m_resource_id ;
 
 	std::string		m_href ;
 	std::string		m_parent ;
diff --git a/libgrive/src/http/HTTP.cc b/libgrive/src/http/HTTP.cc
index 179a62c..b1a2f9a 100644
--- a/libgrive/src/http/HTTP.cc
+++ b/libgrive/src/http/HTTP.cc
@@ -217,6 +217,37 @@ long Agent::Post(
 	return http_code ;
 }
 
+long Agent::Custom(
+	const std::string&		method,
+	const std::string&		url,
+	Receivable				*dest,
+	const http::Headers&	hdr )
+{
+	CURL *curl = m_pimpl->curl ;
+
+	::curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, method.c_str() );
+	::curl_easy_setopt(curl, CURLOPT_URL, 			url.c_str());
+	::curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,	&Agent::Receive ) ;
+	::curl_easy_setopt(curl, CURLOPT_WRITEDATA,		dest ) ;
+
+	SetHeader( hdr ) ;
+	
+	CURLcode curl_code = ::curl_easy_perform(curl);
+
+	long http_code = 0;
+	::curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
+
+	if ( curl_code != CURLE_OK )
+		throw Exception( curl_code, http_code, m_pimpl->error ) ;
+	else if (http_code >= 400 )
+	{
+		std::cout << "http error " << http_code << std::endl ;
+		throw Exception( curl_code, http_code, m_pimpl->error ) ;
+	}
+
+	return http_code ;
+}
+
 void Agent::SetHeader( const http::Headers& hdr )
 {
 	// set headers
@@ -240,8 +271,6 @@ std::string Agent::Escape( const std::string& str )
 	std::string result = tmp ;
 	curl_free( tmp ) ;
 	
-	curl_easy_cleanup(curl);
-	
 	return result ;
 }
 
@@ -254,8 +283,6 @@ std::string Agent::Unescape( const std::string& str )
 	std::string result = tmp ;
 	curl_free( tmp ) ;
 	
-	curl_easy_cleanup(curl);
-	
 	return result ;
 }
 
diff --git a/libgrive/src/http/HTTP.hh b/libgrive/src/http/HTTP.hh
index dc0c71b..a1e2f81 100644
--- a/libgrive/src/http/HTTP.hh
+++ b/libgrive/src/http/HTTP.hh
@@ -59,6 +59,12 @@ public :
 		Receivable				*dest,
 		const http::Headers&	hdr = http::Headers() ) ;
 	
+	long Custom(
+		const std::string&		method,
+		const std::string&		url,
+		Receivable				*dest,
+		const http::Headers&	hdr = http::Headers() ) ;
+	
 	std::string RedirLocation() const ;
 	
 	std::string Escape( const std::string& str ) ;
diff --git a/libgrive/src/xml/Node.hh b/libgrive/src/xml/Node.hh
index 77697b2..a3dd538 100644
--- a/libgrive/src/xml/Node.hh
+++ b/libgrive/src/xml/Node.hh
@@ -73,6 +73,11 @@ public :
 	public :
 		iterator( ImplVec::iterator *impl ) ;
 	
+		typedef Node value_type ;
+		
+		value_type operator*() const ;
+// 		value_type operator*() const ;
+	
 	private :
 		ImplVec::iterator	*m_node ;
 	} ;