Package org.apache.commons.net.tftp

# Class TFTPClient

java.lang.Object
org.apache.commons.net.DatagramSocketClient
org.apache.commons.net.tftp.TFTP
org.apache.commons.net.tftp.TFTPClient

All Implemented Interfaces:
  `AutoCloseable`

public class TFTPClient extends TFTP
The TFTPClient class encapsulates all the aspects of the TFTP protocol necessary to receive and send files through TFTP. It is derived from the `TFTP` because it is more convenient than using aggregation, and as a result exposes the same set of methods to allow you to deal with the TFTP protocol directly. However, almost every user should only be concerend with the the `open()`, `close()`, `sendFile()`, and `receiveFile()` methods. Additionally, the `setMaxTimeouts()` and `setDefaultTimeout()` methods may be of importance for performance tuning.

Details regarding the TFTP protocol and the format of TFTP packets can be found in RFC 783. But the point of these classes is to keep you from having to worry about the internals.

See Also:
  - `TFTP`
  - `TFTPPacket`
  - `TFTPPacketException`

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final int`
  `DEFAULT_MAX_TIMEOUTS`
  The default number of times a `receive` attempt is allowed to timeout before ending attempts to retry the `receive` and failing.

  ### Fields inherited from class org.apache.commons.net.tftp.TFTP

  `ASCII_MODE, BINARY_MODE, DEFAULT_PORT, DEFAULT_TIMEOUT, DEFAULT_TIMEOUT_DURATION, IMAGE_MODE, NETASCII_MODE, OCTET_MODE`

  ### Fields inherited from class org.apache.commons.net.DatagramSocketClient

  `_isOpen_, _socket_, _socketFactory_, _timeout_`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TFTPClient()`
  Creates a TFTPClient instance with a default timeout of DEFAULT_TIMEOUT, maximum timeouts value of DEFAULT_MAX_TIMEOUTS, a null socket, and buffered operations disabled.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `int`
  `getMaxTimeouts()`
  Gets the maximum number of times a `receive` attempt is allowed to timeout before ending attempts to retry the `receive` and failing.
  `long`
  `getTotalBytesReceived()`
  Gets the number of bytes received in the ongoing download.
  `long`
  `getTotalBytesSent()`
  Gets the number of bytes sent in the ongoing download.
  `int`
  `receiveFile(String fileName, int mode, OutputStream output, String hostname)`
  Same as calling receiveFile(fileName, mode, output, hostname, TFTP.DEFAULT_PORT).
  `int`
  `receiveFile(String fileName, int mode, OutputStream output, String hostname, int port)`
  Requests a named file from a remote host, writes the file to an OutputStream, closes the connection, and returns the number of bytes read.
  `int`
  `receiveFile(String fileName, int mode, OutputStream output, InetAddress host)`
  Same as calling receiveFile(fileName, mode, output, host, TFTP.DEFAULT_PORT).
  `int`
  `receiveFile(String fileName, int mode, OutputStream output, InetAddress host, int port)`
  Requests a named file from a remote host, writes the file to an OutputStream, closes the connection, and returns the number of bytes read.
  `void`
  `sendFile(String fileName, int mode, InputStream input, String hostname)`
  Same as calling sendFile(fileName, mode, input, hostname, TFTP.DEFAULT_PORT).
  `void`
  `sendFile(String fileName, int mode, InputStream input, String hostname, int port)`
  Requests to send a file to a remote host, reads the file from an InputStream, sends the file to the remote host, and closes the connection.
  `void`
  `sendFile(String fileName, int mode, InputStream input, InetAddress host)`
  Same as calling sendFile(fileName, mode, input, host, TFTP.DEFAULT_PORT).
  `void`
  `sendFile(String fileName, int mode, InputStream input, InetAddress host, int port)`
  Requests to send a file to a remote host, reads the file from an InputStream, sends the file to the remote host, and closes the connection.
  `void`
  `setMaxTimeouts(int numTimeouts)`
  Sets the maximum number of times a `receive` attempt is allowed to timeout during a receiveFile() or sendFile() operation before ending attempts to retry the `receive` and failing.

  ### Methods inherited from class org.apache.commons.net.tftp.TFTP

  `beginBufferedOps, bufferedReceive, bufferedSend, discardPackets, endBufferedOps, getModeName, getPacketSize, receive, resetBuffersToSize, send, trace`

  ### Methods inherited from class org.apache.commons.net.DatagramSocketClient

  `checkOpen, close, getCharset, getCharsetName, getDefaultTimeout, getLocalAddress, getLocalPort, getSoTimeout, getSoTimeoutDuration, isOpen, open, open, open, setCharset, setDatagramSocketFactory, setDefaultTimeout, setDefaultTimeout, setSoTimeout, setSoTimeout`

  ### Methods inherited from class java.lang.Object

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

- ## Field Details

  - ### DEFAULT_MAX_TIMEOUTS

    public static final int DEFAULT_MAX_TIMEOUTS
    The default number of times a `receive` attempt is allowed to timeout before ending attempts to retry the `receive` and failing. The default is 5 timeouts.
    See Also:
      - Constant Field Values

- ## Constructor Details

  - ### TFTPClient

    public TFTPClient()
    Creates a TFTPClient instance with a default timeout of DEFAULT_TIMEOUT, maximum timeouts value of DEFAULT_MAX_TIMEOUTS, a null socket, and buffered operations disabled.

- ## Method Details

  - ### getMaxTimeouts

    public int getMaxTimeouts()
    Gets the maximum number of times a `receive` attempt is allowed to timeout before ending attempts to retry the `receive` and failing.
    Returns:
      The maximum number of timeouts allowed.

  - ### getTotalBytesReceived

    public long getTotalBytesReceived()
    Gets the number of bytes received in the ongoing download.
    Returns:
      The number of bytes received in the ongoing download.

  - ### getTotalBytesSent

    public long getTotalBytesSent()
    Gets the number of bytes sent in the ongoing download.
    Returns:
      The number of bytes sent in the ongoing download.

  - ### receiveFile

    public int receiveFile(String fileName, int mode, OutputStream output, InetAddress host) throws IOException
    Same as calling receiveFile(fileName, mode, output, host, TFTP.DEFAULT_PORT).
    Parameters:
      `fileName` - The name of the file to receive.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `output` - The OutputStream to which the file should be written.
      `host` - The remote host serving the file.
    Returns:
      number of bytes read
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.

  - ### receiveFile

    public int receiveFile(String fileName, int mode, OutputStream output, InetAddress host, int port) throws IOException
    Requests a named file from a remote host, writes the file to an OutputStream, closes the connection, and returns the number of bytes read. A local UDP socket must first be created by `open()` before invoking this method. This method will not close the OutputStream containing the file; you must close it after the method invocation.
    Parameters:
      `fileName` - The name of the file to receive.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `output` - The OutputStream to which the file should be written.
      `host` - The remote host serving the file.
      `port` - The port number of the remote TFTP server.
    Returns:
      number of bytes read
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.

  - ### receiveFile

    public int receiveFile(String fileName, int mode, OutputStream output, String hostname) throws UnknownHostException, IOException
    Same as calling receiveFile(fileName, mode, output, hostname, TFTP.DEFAULT_PORT).
    Parameters:
      `fileName` - The name of the file to receive.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `output` - The OutputStream to which the file should be written.
      `hostname` - The name of the remote host serving the file.
    Returns:
      number of bytes read
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.
      `UnknownHostException` - If the hostname cannot be resolved.

  - ### receiveFile

    public int receiveFile(String fileName, int mode, OutputStream output, String hostname, int port) throws UnknownHostException, IOException
    Requests a named file from a remote host, writes the file to an OutputStream, closes the connection, and returns the number of bytes read. A local UDP socket must first be created by `open()` before invoking this method. This method will not close the OutputStream containing the file; you must close it after the method invocation.
    Parameters:
      `fileName` - The name of the file to receive.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `output` - The OutputStream to which the file should be written.
      `hostname` - The name of the remote host serving the file.
      `port` - The port number of the remote TFTP server.
    Returns:
      number of bytes read
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.
      `UnknownHostException` - If the hostname cannot be resolved.

  - ### sendFile

    public void sendFile(String fileName, int mode, InputStream input, InetAddress host) throws IOException
    Same as calling sendFile(fileName, mode, input, host, TFTP.DEFAULT_PORT).
    Parameters:
      `fileName` - The name the remote server should use when creating the file on its file system.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `input` - the input stream containing the data to be sent
      `host` - The name of the remote host receiving the file.
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.
      `UnknownHostException` - If the hostname cannot be resolved.

  - ### sendFile

    public void sendFile(String fileName, int mode, InputStream input, InetAddress host, int port) throws IOException
    Requests to send a file to a remote host, reads the file from an InputStream, sends the file to the remote host, and closes the connection. A local UDP socket must first be created by `open()` before invoking this method. This method will not close the InputStream containing the file; you must close it after the method invocation.
    Parameters:
      `fileName` - The name the remote server should use when creating the file on its file system.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `input` - the input stream containing the data to be sent
      `host` - The remote host receiving the file.
      `port` - The port number of the remote TFTP server.
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.

  - ### sendFile

    public void sendFile(String fileName, int mode, InputStream input, String hostname) throws UnknownHostException, IOException
    Same as calling sendFile(fileName, mode, input, hostname, TFTP.DEFAULT_PORT).
    Parameters:
      `fileName` - The name the remote server should use when creating the file on its file system.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `input` - the input stream containing the data to be sent
      `hostname` - The name of the remote host receiving the file.
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.
      `UnknownHostException` - If the hostname cannot be resolved.

  - ### sendFile

    public void sendFile(String fileName, int mode, InputStream input, String hostname, int port) throws UnknownHostException, IOException
    Requests to send a file to a remote host, reads the file from an InputStream, sends the file to the remote host, and closes the connection. A local UDP socket must first be created by `open()` before invoking this method. This method will not close the InputStream containing the file; you must close it after the method invocation.
    Parameters:
      `fileName` - The name the remote server should use when creating the file on its file system.
      `mode` - The TFTP mode of the transfer (one of the MODE constants).
      `input` - the input stream containing the data to be sent
      `hostname` - The name of the remote host receiving the file.
      `port` - The port number of the remote TFTP server.
    Throws:
      `IOException` - If an I/O error occurs. The nature of the error will be reported in the message.
      `UnknownHostException` - If the hostname cannot be resolved.

  - ### setMaxTimeouts

    public void setMaxTimeouts(int numTimeouts)
    Sets the maximum number of times a `receive` attempt is allowed to timeout during a receiveFile() or sendFile() operation before ending attempts to retry the `receive` and failing. The default is DEFAULT_MAX_TIMEOUTS.
    Parameters:
      `numTimeouts` - The maximum number of timeouts to allow. Values less than 1 should not be used, but if they are, they are treated as 1.