mirror of https://github.com/vitalif/grive2
161 lines
4.3 KiB
C++
161 lines
4.3 KiB
C++
/*
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grive: an GPL program to sync a local directory with Google Drive
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Copyright (C) 2012 Wan Wai Ho
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation version 2
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of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "File.hh"
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#include "Resource.hh"
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#include "CommonUri.hh"
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#include "http/Download.hh"
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#include "http/StringResponse.hh"
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#include "http/XmlResponse.hh"
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#include "protocol/OAuth2.hh"
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#include "util/Crypt.hh"
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#include "util/DateTime.hh"
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#include "util/OS.hh"
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#include "util/Log.hh"
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#include "xml/Node.hh"
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#include <cassert>
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#include <fstream>
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namespace gr {
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File::File( const Entry& entry, const Resource *parent ) :
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m_entry ( entry ),
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m_parent ( parent )
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{
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}
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void File::Update( http::Agent *http, const http::Headers& auth )
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{
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assert( m_parent != 0 ) ;
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bool changed = true ;
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fs::path path = Path() ;
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// compare checksum first if file exists
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std::ifstream ifile( path.string().c_str(), std::ios::binary | std::ios::in ) ;
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if ( ifile && m_entry.ServerMD5() == crypt::MD5(ifile.rdbuf()) )
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changed = false ;
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// if the checksum is different, file is changed and we need to update
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if ( changed )
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{
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DateTime remote = m_entry.ServerModified() ;
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DateTime local = ifile ? os::FileMTime( path ) : DateTime() ;
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// remote file is newer, download file
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if ( !ifile || remote > local )
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Download( http, path, auth ) ;
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else
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{
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// re-reading the file
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ifile.seekg(0) ;
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Upload( http, ifile.rdbuf(), auth ) ;
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}
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}
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}
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void File::Delete( http::Agent *http, const http::Headers& auth )
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{
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http::Headers hdr( auth ) ;
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hdr.push_back( "If-Match: " + m_entry.ETag() ) ;
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http::StringResponse str ;
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http->Custom( "DELETE", feed_base + "/" + m_entry.ResourceID() + "?delete=true", &str, hdr ) ;
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}
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void File::Download( http::Agent* http, const fs::path& file, const http::Headers& auth ) const
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{
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Log( "Downloading %1%", file ) ;
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http::Download dl( file.string(), http::Download::NoChecksum() ) ;
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long r = http->Get( m_entry.ContentSrc(), &dl, auth ) ;
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if ( r <= 400 )
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os::SetFileTime( file, m_entry.ServerModified() ) ;
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}
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bool File::Upload( http::Agent* http, std::streambuf *file, const http::Headers& auth )
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{
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// upload link missing means that file is read only
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if ( m_entry.UploadLink().empty() )
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{
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Log( "Cannot upload %1%: file read-only.", m_entry.Title(), log::warning ) ;
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return false ;
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}
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Log( "Uploading %1%", m_entry.Title() ) ;
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std::string meta =
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"<?xml version='1.0' encoding='UTF-8'?>\n"
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"<entry xmlns=\"http://www.w3.org/2005/Atom\" xmlns:docs=\"http://schemas.google.com/docs/2007\">"
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"<category scheme=\"http://schemas.google.com/g/2005#kind\" "
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"term=\"http://schemas.google.com/docs/2007#file\"/>"
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"<title>" + m_entry.Filename() + "</title>"
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"</entry>" ;
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std::string data(
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(std::istreambuf_iterator<char>(file)),
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(std::istreambuf_iterator<char>()) ) ;
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std::ostringstream xcontent_len ;
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xcontent_len << "X-Upload-Content-Length: " << data.size() ;
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http::Headers hdr( auth ) ;
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hdr.push_back( "Content-Type: application/atom+xml" ) ;
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hdr.push_back( "X-Upload-Content-Type: application/octet-stream" ) ;
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hdr.push_back( xcontent_len.str() ) ;
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hdr.push_back( "If-Match: " + m_entry.ETag() ) ;
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hdr.push_back( "Expect:" ) ;
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http::StringResponse str ;
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http->Put( m_entry.UploadLink(), meta, &str, hdr ) ;
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std::string uplink = http->RedirLocation() ;
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// parse the header and find "Location"
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http::Headers uphdr ;
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uphdr.push_back( "Expect:" ) ;
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uphdr.push_back( "Accept:" ) ;
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http::XmlResponse xml ;
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http->Put( uplink, data, &xml, uphdr ) ;
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Trace( "Receipted response = %1%", xml.Response() ) ;
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m_entry.Update( xml.Response() ) ;
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return true ;
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}
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fs::path File::Path() const
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{
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assert( m_parent != 0 ) ;
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return m_parent->Path() / m_entry.Filename() ;
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}
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std::string File::ResourceID() const
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{
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return m_entry.ResourceID() ;
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}
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} // end of namespace
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