/////////////////////////////////////////////////////////////////////////////
-// Name: ftp.cpp
+// Name: common/ftp.cpp
// Purpose: FTP protocol
// Author: Guilhem Lavaux
// Modified by: Mark Johnson, wxWindows@mj10777.de
// Vadim Zeitlin (numerous fixes and rewrites to all part of the
// code, support ASCII/Binary modes, better error reporting, more
// robust Abort(), support for arbitrary FTP commands, ...)
+// Randall Fox (support for active mode)
// Created: 07/07/1997
// RCS-ID: $Id$
// Copyright: (c) 1997, 1998 Guilhem Lavaux
+// (c) 1998-2004 wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
SetNotify(0);
SetFlags(wxSOCKET_NONE);
+ m_bPassive = true;
+ SetDefaultTimeout(60); // Default is Sixty Seconds
+ m_bEncounteredError = false;
}
wxFTP::~wxFTP()
{
if ( m_streaming )
{
+ // if we are streaming, this will issue
+ // an FTP ABORT command, to tell the server we are aborting
(void)Abort();
}
+ // now this issues a "QUIT" command to tell the server we are
Close();
}
char wxFTP::GetResult()
{
+ // if we've already had a read or write timeout error, the connection is
+ // probably toast, so don't bother, it just wastes the users time
+ if ( m_bEncounteredError )
+ return 0;
+
wxString code;
// m_lastResult will contain the entire server response, possibly on
while ( !endOfReply && !badReply )
{
wxString line;
- m_lastError = ReadLine(line);
+ m_lastError = ReadLine(this,line);
if ( m_lastError )
+ {
+ m_bEncounteredError = true;
return 0;
+ }
if ( !m_lastResult.empty() )
{
: wxSocketInputStream(*sock)
{
m_ftp = ftp;
-
- // FIXME make the timeout configurable
-
- // set a shorter than default timeout
- m_i_socket->SetTimeout(60); // 1 minute
+ // socket timeout automatically set in GetPort function
}
- size_t GetSize() const { return m_ftpsize; }
-
virtual ~wxInputFTPStream()
{
- delete m_i_socket;
+ delete m_i_socket; // keep at top
- if ( IsOk() )
- {
- // wait for "226 transfer completed"
- m_ftp->CheckResult('2');
+ // when checking the result, the stream will
+ // almost always show an error, even if the file was
+ // properly transfered, thus, lets just grab the result
- m_ftp->m_streaming = false;
+ // we are looking for "226 transfer completed"
+ char code = m_ftp->GetResult();
+ if ('2' == code)
+ {
+ // it was a good transfer.
+ // we're done!
+ m_ftp->m_streaming = false;
+ return;
}
- else
+ // did we timeout?
+ if (0 == code)
{
+ // the connection is probably toast. issue an abort, and
+ // then a close. there won't be any more waiting
+ // for this connection
m_ftp->Abort();
+ m_ftp->Close();
+ return;
}
-
- // delete m_i_socket; // moved to top of destructor to accomodate wu-FTPd >= 2.6.0
+ // There was a problem with the transfer and the server
+ // has acknowledged it. If we issue an "ABORT" now, the user
+ // would get the "226" for the abort and think the xfer was
+ // complete, thus, don't do anything here, just return
}
wxFTP *m_ftp;
- size_t m_ftpsize;
DECLARE_NO_COPY_CLASS(wxInputFTPStream)
};
delete m_o_socket;
// read this reply
- m_ftp->CheckResult('2');
+ m_ftp->GetResult(); // save result so user can get to it
m_ftp->m_streaming = false;
}
DECLARE_NO_COPY_CLASS(wxOutputFTPStream)
};
-wxSocketClient *wxFTP::GetPort()
+void wxFTP::SetDefaultTimeout(wxUint32 Value)
{
- int a[6];
+ m_uiDefaultTimeout = Value;
+ SetTimeout(Value); // sets it for this socket
+}
- if ( !DoSimpleCommand(_T("PASV")) )
+
+wxSocketBase *wxFTP::GetPort()
+{
+ /*
+ PASSIVE: Client sends a "PASV" to the server. The server responds with
+ an address and port number which it will be listening on. Then
+ the client connects to the server at the specified address and
+ port.
+
+ ACTIVE: Client sends the server a PORT command which includes an
+ address and port number which the client will be listening on.
+ The server then connects to the client at that address and
+ port.
+ */
+
+ wxSocketBase *socket = m_bPassive ? GetPassivePort() : GetActivePort();
+ if ( !socket )
+ {
+ m_bEncounteredError = true;
+ return NULL;
+ }
+
+ // Now set the time for the new socket to the default or user selected
+ // timeout period
+ socket->SetTimeout(m_uiDefaultTimeout);
+
+ return socket;
+}
+
+wxSocketBase *wxFTP::AcceptIfActive(wxSocketBase *sock)
+{
+ if ( m_bPassive )
+ return sock;
+
+ // now wait for a connection from server
+ wxSocketServer *sockSrv = (wxSocketServer *)sock;
+ if ( !sockSrv->WaitForAccept() )
{
- wxLogError(_("The FTP server doesn't support passive mode."));
+ m_lastError = wxPROTO_CONNERR;
+ wxLogError(_("Timeout while waiting for FTP server to connect, try passive mode."));
+ delete sock;
+ sock = NULL;
+ }
+ else
+ {
+ sock = sockSrv->Accept(true);
+ delete sockSrv;
+ }
+
+ return sock;
+}
+
+wxString wxFTP::GetPortCmdArgument(wxIPV4address addrLocal,
+ wxIPV4address addrNew)
+{
+ // Just fills in the return value with the local IP
+ // address of the current socket. Also it fill in the
+ // PORT which the client will be listening on
+ wxString addrIP = addrLocal.IPAddress();
+ int portNew = addrNew.Service();
+
+ // We need to break the PORT number in bytes
+ addrIP.Replace(_T("."), _T(","));
+ addrIP << _T(',')
+ << wxString::Format(_T("%d"), portNew >> 8) << _T(',')
+ << wxString::Format(_T("%d"), portNew & 0xff);
+
+ // Now we have a value like "10,0,0,1,5,23"
+ return addrIP;
+}
+
+wxSocketBase *wxFTP::GetActivePort()
+{
+ // we need an address to listen on
+ wxIPV4address addrNew, addrLocal;
+ GetLocal(addrLocal);
+ addrNew.AnyAddress();
+ addrNew.Service(0); // pick an open port number.
+
+ wxSocketServer *sockSrv = new wxSocketServer(addrNew);
+ if (!sockSrv->Ok())
+ {
+ // We use Ok() here to see if everything is ok
+ m_lastError = wxPROTO_PROTERR;
+ delete sockSrv;
return NULL;
}
- const wxChar *addrStart = wxStrchr(m_lastResult, _T('('));
- if ( !addrStart )
+ //gets the new address, actually it is just the port number
+ sockSrv->GetLocal(addrNew);
+
+ // Now we create the argument of the PORT command, we send in both
+ // addresses because the addrNew has an IP of "0.0.0.0", so we need the
+ // value in addrLocal
+ wxString port = GetPortCmdArgument(addrLocal, addrNew);
+ if ( !DoSimpleCommand(_T("PORT "), port) )
{
m_lastError = wxPROTO_PROTERR;
+ delete sockSrv;
+ wxLogError(_("The FTP server doesn't support the PORT command."));
+ return NULL;
+ }
+ sockSrv->Notify(false); // Don't send any events
+ return sockSrv;
+}
+
+wxSocketBase *wxFTP::GetPassivePort()
+{
+ if ( !DoSimpleCommand(_T("PASV")) )
+ {
+ wxLogError(_("The FTP server doesn't support passive mode."));
return NULL;
}
- const wxChar *addrEnd = wxStrchr(addrStart, _T(')'));
+ const wxChar *addrStart = wxStrchr(m_lastResult, _T('('));
+ const wxChar *addrEnd = addrStart ? wxStrchr(addrStart, _T(')')) : NULL;
if ( !addrEnd )
{
m_lastError = wxPROTO_PROTERR;
return NULL;
}
+ // get the port number and address
+ int a[6];
wxString straddr(addrStart + 1, addrEnd);
-
wxSscanf(straddr, wxT("%d,%d,%d,%d,%d,%d"),
&a[2],&a[3],&a[4],&a[5],&a[0],&a[1]);
(wxUint16)a[3] << 16 |
(wxUint16)a[4] << 8 |
a[5];
- wxUint16 port = (wxUint16)a[0] << 8 | a[1];
+ wxUint16 port = (wxUint16)(a[0] << 8 | a[1]);
wxIPV4address addr;
addr.Hostname(hostaddr);
wxInputStream *wxFTP::GetInputStream(const wxString& path)
{
- int pos_size;
- wxInputFTPStream *in_stream;
-
if ( ( m_currentTransfermode == NONE ) && !SetTransferMode(BINARY) )
return NULL;
- wxSocketClient *sock = GetPort();
+ wxSocketBase *sock = GetPort();
if ( !sock )
{
if ( !CheckCommand(tmp_str, '1') )
return NULL;
- m_streaming = true;
-
- in_stream = new wxInputFTPStream(this, sock);
+ sock = AcceptIfActive(sock);
+ if ( !sock )
+ return NULL;
- pos_size = m_lastResult.Index(wxT('('));
- if ( pos_size != wxNOT_FOUND )
- {
- wxString str_size = m_lastResult(pos_size+1, m_lastResult.Index(wxT(')'))-1);
+ sock->SetFlags(wxSOCKET_WAITALL);
- in_stream->m_ftpsize = wxAtoi(WXSTRINGCAST str_size);
- }
+ m_streaming = true;
- sock->SetFlags(wxSOCKET_WAITALL);
+ wxInputFTPStream *in_stream = new wxInputFTPStream(this, sock);
return in_stream;
}
if ( ( m_currentTransfermode == NONE ) && !SetTransferMode(BINARY) )
return NULL;
- wxSocketClient *sock = GetPort();
+ wxSocketBase *sock = GetPort();
wxString tmp_str = wxT("STOR ") + path;
if ( !CheckCommand(tmp_str, '1') )
return NULL;
+ sock = AcceptIfActive(sock);
+
m_streaming = true;
return new wxOutputFTPStream(this, sock);
line << _T(' ') << wildcard;
}
- if (!CheckCommand(line, '1'))
+ if ( !CheckCommand(line, '1') )
{
+ m_lastError = wxPROTO_PROTERR;
+ wxLogDebug(_T("FTP 'LIST' command returned unexpected result from server"));
+ delete sock;
return false;
}
+
+ sock = AcceptIfActive(sock);
+ if ( !sock )
+ return false;
+
files.Empty();
- while ( ReadLine(sock, line) == wxPROTO_NOERR )
+ while (ReadLine(sock, line) == wxPROTO_NOERR )
{
files.Add(line);
}
+
delete sock;
// the file list should be terminated by "226 Transfer complete""
- if ( !CheckResult('2') )
- return false;
-
- return true;
+ return CheckResult('2');
}
bool wxFTP::FileExists(const wxString& fileName)
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