I'm trying to log in to Windows Server 2008 Telnet Service.
I have code, readUntil(), that gets an InputStream and does a read()
until it finds 'ogin: ' or 'assword: ' and flags if it found it.
On 2.0 it works fine, but under 3.1 and 3.2 in one section or the other
available() never returns anything more, and the "last part" of the data
never gets read():
Working:
tel: org.apache.commons.net.telnet.TelnetClient@17b2b2
is: java.io.BufferedInputStream@fe0fd9
os: org.apache.commons.net.io.ToNetASCIIOutputStream@1c293f8
readUntil()
inStr: 'ogin: '
iAvail: 2
iByte: 87
iByte: 101
Dropped out
iAvail: 45
iByte: 108
iByte: 99
iByte: 111
iByte: 109
iByte: 101
iByte: 32
iByte: 116
iByte: 111
iByte: 32
iByte: 77
iByte: 105
iByte: 99
iByte: 114
iByte: 111
iByte: 115
iByte: 111
iByte: 102
iByte: 116
iByte: 32
iByte: 84
iByte: 101
iByte: 108
iByte: 110
iByte: 101
iByte: 116
iByte: 32
iByte: 83
iByte: 101
iByte: 114
iByte: 118
iByte: 105
iByte: 99
iByte: 101
iByte: 32
iByte: 13
iByte: 10
iByte: 10
iByte: 13
iByte: 108
iByte: 111
iByte: 103
iByte: 105
iByte: 110
iByte: 58
iByte: 32
-- FOUND --
Dropped out
.writeCmd()
readUntil()
inStr: 'assword: '
iAvail: 1
iByte: 65
Dropped out
iAvail: 24
iByte: 100
iByte: 109
iByte: 105
iByte: 110
iByte: 105
iByte: 115
iByte: 116
iByte: 114
iByte: 97
iByte: 116
iByte: 111
iByte: 114
iByte: 10
iByte: 13
iByte: 112
iByte: 97
iByte: 115
iByte: 115
iByte: 119
iByte: 111
iByte: 114
iByte: 100
iByte: 58
iByte: 32
-- FOUND --
Dropped out
.writeCmd()
====================================
Doesn't read last part of Password section:
tel: org.apache.commons.net.telnet.TelnetClient@1f10a67
is: java.io.BufferedInputStream@b3b6a6
os: org.apache.commons.net.telnet.TelnetOutputStream@9c8c3f
readUntil()
inStr: 'ogin: '
iAvail: 1
iByte: 87
Dropped out
iAvail: 46
iByte: 101
iByte: 108
iByte: 99
iByte: 111
iByte: 109
iByte: 101
iByte: 32
iByte: 116
iByte: 111
iByte: 32
iByte: 77
iByte: 105
iByte: 99
iByte: 114
iByte: 111
iByte: 115
iByte: 111
iByte: 102
iByte: 116
iByte: 32
iByte: 84
iByte: 101
iByte: 108
iByte: 110
iByte: 101
iByte: 116
iByte: 32
iByte: 83
iByte: 101
iByte: 114
iByte: 118
iByte: 105
iByte: 99
iByte: 101
iByte: 32
iByte: 13
iByte: 10
iByte: 10
iByte: 13
iByte: 108
iByte: 111
iByte: 103
iByte: 105
iByte: 110
iByte: 58
iByte: 32
-- FOUND --
Dropped out
.writeCmd()
readUntil()
inStr: 'assword: '
iAvail: 13
iByte: 65
iByte: 100
iByte: 109
iByte: 105
iByte: 110
iByte: 105
iByte: 115
iByte: 116
iByte: 114
iByte: 97
iByte: 116
iByte: 111
iByte: 114
Dropped out
====================================
Doesn't read last part of Login section:
tel: org.apache.commons.net.telnet.TelnetClient@1f5b4d1
is: java.io.BufferedInputStream@1cee792
os: org.apache.commons.net.telnet.TelnetOutputStream@c5577c
readUntil()
inStr: 'ogin: '
iAvail: 20
iByte: 87
iByte: 101
iByte: 108
iByte: 99
iByte: 111
iByte: 109
iByte: 101
iByte: 32
iByte: 116
iByte: 111
iByte: 32
iByte: 77
iByte: 105
iByte: 99
iByte: 114
iByte: 111
iByte: 115
iByte: 111
iByte: 102
iByte: 116
Dropped out
Here's the code:
//{{{ readUntil()
// Note:
//
// This works under 2.0, but in 3.2 it never gets the
// last part of 'assword:', and in 3.1 it never gets the
// last part of 'ogin:'
//
protected boolean readUntil(InputStream is, String inStr)
{
if ( Util.DEBUG )
{
System.out.println("readUntil()");
System.out.println("inStr: '"+inStr+"'");
}
byte[] buffer = new byte[2048];
byte bByte;
boolean bRet = false;
int iAvail = 0;
int iBytesRead = 0;
int loc;
int iBufP = 0;
int iLoopCount = 0;
int iByte = 0;
int i;
String blockStr = "";
for ( i = 0; i < 2048; i++ )
buffer[i] = (byte)0x00;
while ( true )
{
try
{
iAvail = is.available();
if ( iAvail > 0 )
{
if ( Util.DEBUG )
System.out.println("iAvail: "+iAvail);
while ( iAvail > 0 )
{
iByte = is.read();
if ( iByte == -1 )
{
// EOS..
if ( Util.DEBUG )
System.out.println("Hit EOS, breaking..");
break;
}
else
{
if ( Util.DEBUG )
System.out.println("iByte: "+iByte);
buffer[iBufP] = (byte)iByte;
iBufP++;
iBytesRead++;
iAvail--;
blockStr = new String(buffer);
loc = blockStr.indexOf(inStr);
if ( loc != -1 )
{
if ( Util.DEBUG )
System.out.println("-- FOUND --");
bRet = true;
break;
}
}
}
if ( Util.DEBUG )
System.out.println("Dropped out");
}
}
catch (IOException ioe)
{
System.out.println("readUntil() Exception");
ioe.printStackTrace();
}
if ( (iByte == -1) || (bRet == true) )
break;
} // End while..
return bRet;
} //}}}
