org.simoes.lpd.util
Class NetUtil

java.lang.Object
  org.simoes.lpd.util.NetUtil

public class NetUtil

extends java.lang.Object

Provides utility methods helping us to parse the byte streams sent to us from the client.

Author:

Chris Simoes

Constructor Summary

NetUtil()
Default Contructor.

Method Summary

byte[]	readCommand(java.io.InputStream is) Reads a command defined by the RFC1179 spec.
byte[]	readControlFile(java.io.InputStream is, java.io.OutputStream os) Reads the ControlFile and retunrs it as a byte[]
byte[]	readNextInput(java.io.InputStream is, java.io.OutputStream os) Used by CommandReceiveJob to read the headers of the ControlFile or the DataFile from the client.
byte[]	readPrintFile(java.io.InputStream is, java.io.OutputStream os) Reads the DataFile and returns it as a byte[]
byte[]	readPrintFile(java.io.InputStream is, java.io.OutputStream os, int size) Reads the DataFile and returns it as a byte[]

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NetUtil

public NetUtil()

Default Contructor.

Method Detail

readCommand

public byte[] readCommand(java.io.InputStream is)
                   throws java.io.IOException

Reads a command defined by the RFC1179 spec. Basically the command is all the data until we see 0x10.

Parameters:

is - the InputStream providing us with a command from the client.

Returns:

the command we found in the InputStream

Throws:

java.io.IOException - thrown if there is an IO problem

readNextInput

public byte[] readNextInput(java.io.InputStream is,
                            java.io.OutputStream os)
                     throws java.io.IOException

Used by CommandReceiveJob to read the headers of the ControlFile or the DataFile from the client. Please see section 6 of the RFC1179 specification for more details.

Parameters:

is - the InputStream from the client sending us the print job

os - the OutputStream to the client we are writing reponses to

Returns:

a byte[] from the InputStream holding the ControlFile or the DataFile

Throws:

java.io.IOException - thrown if there is an IO problem

readControlFile

public byte[] readControlFile(java.io.InputStream is,
                              java.io.OutputStream os)
                       throws java.io.IOException

Reads the ControlFile and retunrs it as a byte[]

Parameters:

is - the InputStream from the client sending us the control file

os - the OutputStream to the client we are writing reponses to

Returns:

a byte[] from the InputStream holding the ControlFile

Throws:

java.io.IOException - thrown if there is an IO problem

readPrintFile

public byte[] readPrintFile(java.io.InputStream is,
                            java.io.OutputStream os)
                     throws java.io.IOException

Reads the DataFile and returns it as a byte[]

Parameters:

is - the InputStream from the client sending us the data file

os - the OutputStream to the client we are writing reponses to

Returns:

a byte[] from the InputStream holding the DataFile

Throws:

java.io.IOException - thrown if there is an IO problem

readPrintFile

public byte[] readPrintFile(java.io.InputStream is,
                            java.io.OutputStream os,
                            int size)
                     throws java.io.IOException

Reads the DataFile and returns it as a byte[]

Parameters:

is - the InputStream from the client sending us the data file

os - the OutputStream to the client we are writing reponses to

size - the number of bytes to read from the stream

Returns:

a byte[] from the InputStream holding the DataFile

Throws:

java.io.IOException - thrown if there is an IO problem