Package org.apache.commons.net.finger

Class FingerClient

java.lang.Object

org.apache.commons.net.SocketClient

org.apache.commons.net.finger.FingerClient

Direct Known Subclasses:

WhoisClient

public class FingerClient
extends SocketClient

The FingerClient class implements the client side of the Internet Finger Protocol defined in RFC 1288. To finger a host you create a FingerClient instance, connect to the host, query the host, and finally disconnect from the host. If the finger service you want to query is on a non-standard port, connect to the host at that port. Here's a sample use:

 FingerClient finger;

 finger = new FingerClient();

 try {
     finger.connect("foo.bar.com");
     System.out.println(finger.query("foobar", false));
     finger.disconnect();
 } catch (IOException e) {
     System.err.println("Error I/O exception: " + e.getMessage());
     return;
 }
 

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_PORT	The default FINGER port.

Fields inherited from class org.apache.commons.net.SocketClient

_defaultPort_, _hostname_, _input_, _output_, _serverSocketFactory_, _socket_, _socketFactory_, _timeout_, connectTimeout, NETASCII_EOL, remoteInetSocketAddress

Constructor Summary

Constructors

Constructor	Description
FingerClient()	The default FingerClient constructor.

Method Summary

Modifier and Type	Method	Description
InputStream	getInputStream(boolean longOutput)	Fingers the connected host and returns the input stream from the network connection of the finger query.
InputStream	getInputStream(boolean longOutput, String user)	Fingers a user and returns the input stream from the network connection of the finger query.
InputStream	getInputStream(boolean longOutput, String user, String encoding)	Fingers a user and returns the input stream from the network connection of the finger query.
String	query(boolean longOutput)	Fingers the connected host and returns the output as a String.
String	query(boolean longOutput, String user)	Fingers a user at the connected host and returns the output as a String.

Methods inherited from class org.apache.commons.net.SocketClient

_connectAction_, addProtocolCommandListener, applySocketAttributes, checkOpenOutputStream, connect, connect, connect, connect, connect, connect, createCommandSupport, disconnect, fireCommandSent, fireReplyReceived, getCharset, getCharsetName, getCommandSupport, getConnectTimeout, getDefaultPort, getDefaultTimeout, getKeepAlive, getLocalAddress, getLocalPort, getProxy, getReceiveBufferSize, getRemoteAddress, getRemoteInetSocketAddress, getRemotePort, getSendBufferSize, getServerSocketFactory, getSoLinger, getSoTimeout, getTcpNoDelay, isAvailable, isConnected, removeProtocolCommandListener, setCharset, setConnectTimeout, setDefaultPort, setDefaultTimeout, setKeepAlive, setProxy, setReceiveBufferSize, setSendBufferSize, setServerSocketFactory, setSocketFactory, setSoLinger, setSoTimeout, setTcpNoDelay, verifyRemote

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_PORT

public static final int DEFAULT_PORT

The default FINGER port. Set to 79 according to RFC 1288.

See Also:

• Constant Field Values

Constructor Details

FingerClient

public FingerClient()

The default FingerClient constructor. Initializes the default port to DEFAULT_PORT.

Method Details

getInputStream

public InputStream getInputStream(boolean longOutput)
                           throws IOException

Fingers the connected host and returns the input stream from the network connection of the finger query. This is equivalent to calling getInputStream(longOutput, ""). You must first connect to a finger server before calling this method, and you should disconnect after finishing reading the stream.

Parameters:

longOutput - Set to true if long output is requested, false if not.

Returns:

The InputStream of the network connection of the finger query. Can be read to obtain finger results.

Throws:

IOException - If an I/O error during the operation.

getInputStream

public InputStream getInputStream(boolean longOutput,
 String user)
                           throws IOException

Fingers a user and returns the input stream from the network connection of the finger query. You must first connect to a finger server before calling this method, and you should disconnect after finishing reading the stream.

Parameters:

longOutput - Set to true if long output is requested, false if not.

user - The name of the user to finger.

Returns:

The InputStream of the network connection of the finger query. Can be read to obtain finger results.

Throws:

IOException - If an I/O error during the operation.

getInputStream

public InputStream getInputStream(boolean longOutput,
 String user,
 String encoding)
                           throws IOException

Fingers a user and returns the input stream from the network connection of the finger query. You must first connect to a finger server before calling this method, and you should disconnect after finishing reading the stream.

Parameters:

longOutput - Set to true if long output is requested, false if not.

user - The name of the user to finger.

encoding - the character encoding that should be used for the query, null for the platform's default encoding

Returns:

The InputStream of the network connection of the finger query. Can be read to obtain finger results.

Throws:

IOException - If an I/O error during the operation.

query

public String query(boolean longOutput)
             throws IOException

Fingers the connected host and returns the output as a String. You must first connect to a finger server before calling this method, and you should disconnect afterward. This is equivalent to calling query(longOutput, "").

Parameters:

longOutput - Set to true if long output is requested, false if not.

Returns:

The result of the finger query.

Throws:

IOException - If an I/O error occurs while reading the socket.

query

public String query(boolean longOutput,
 String user)
             throws IOException

Fingers a user at the connected host and returns the output as a String. You must first connect to a finger server before calling this method, and you should disconnect afterward.

Parameters:

longOutput - Set to true if long output is requested, false if not.

user - The name of the user to finger.

Returns:

The result of the finger query.

Throws:

IOException - If an I/O error occurs while reading the socket.