apache-comnons系列之commons-net3.6 学习笔记
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apache-comnons系列之commons-net3.6 学习笔记
概述
SocketClient
- The SocketClient provides the basic operations that are required of client objects accessing sockets.
FTP
- FTP provides the basic the functionality necessary to implement your own FTP client. It extends org.apache.commons.net.SocketClient since
- extending TelnetClient was causing unwanted behavior (like connections that did not time out properly)
FTPClient
- FTPClient encapsulates all the functionality necessary to store and retrieve files from an FTP server. This class takes care of all
- low level details of interacting with an FTP server and provides a convenient higher level interface.
DiscardTCPClient
- The DiscardTCPClient class is a TCP implementation of a client for the Discard protocol described in RFC 863.
EchoTCPClient
- The EchoTCPClient class is a TCP implementation of a client for the Echo protocol described in RFC 862.
ProtocolCommandSupport
- ProtocolCommandSupport is a convenience class for managing a list of ProtocolCommandListeners and firing ProtocolCommandEvents. You can
- simply delegate ProtocolCommandEvent firing and listener registering/unregistering tasks to this class.
- Object __source;
- ListenerList __listeners
ProtocolCommandEvent
- There exists a large class of IETF protocols that work by sending an ASCII text command and arguments to a server, and then receiving an ASCII text reply.
ProtocolCommandListener
- EventListener
FTPFile
- The FTPFile class is used to represent information about files stored on an FTP server.
FTPFileEntryParser
- FTPFileEntryParser defines the interface for parsing a single FTP file listing and converting that information into an {@link org.apache.commons.net.ftp.FTPFile} instance.
UnixFTPEntryParser
- Implementation FTPFileEntryParser and FTPFileListParser for standardUnix Systems.
FTPFileFilters
- Implements some simple FTPFileFilter classes.
测试
- org.apache.commons.net.SocketClientTest
- protected int timeout—-The timeout to use after opening a socket
- protected Socket socket—-The socket used for the connection.
- protected InputStream input—-The socket’s InputStream.
- protected OutputStream output—-The socket’s OutputStream.
- protected SocketFactory socketFactory—-The socket’s SocketFactory.
- protected ServerSocketFactory serverSocketFactory—-The socket’s ServerSocket Factory.
- connect
- Opens a Socket connected to a remote host at the specified port and originating from the current host at a system assigned port.
- Before returning, {@link #connectAction connectAction() } is called to perform connection initialization actions.
- connectAction
- input = socket.getInputStream();
- output = socket.getOutputStream();
- disconnect
- Disconnects the socket connection.
- closeQuietly
- FtpTest
- protected BufferedReader controlInput—-Wraps SocketClient.input to facilitate the reading of text from the FTP control connection.
- protected BufferedWriter controlOutput—-Wraps SocketClient.output to facilitate the writing of text to the FTP control connection.
- replyCode/_replyLines/_newReplyString/_commandSupport
- connectAction
- controlInput =new CRLFLineReader(new InputStreamReader(input, getControlEncoding()));
- controlOutput =new BufferedWriter(new OutputStreamWriter(output, getControlEncoding()));
- sendCommand
- Sends an FTP command to the server, waits for a reply and returns the numerical response code
- __buildMessage
- __send
- controlOutput.write(message);
- controlOutput.flush();
- fireCommandSent
- If there are any listeners, send them the command details./事件监听处理发送事件
- getCommandSupport().fireCommandSent(command, message);
- __getReply
- String line = controlInput.readLine();/等待命令返回信息
- _replyLines.add(line);
- fireReplyReceived
- fireReplyReceived
- If there are any listeners, send them the reply details./事件监听处理返回信息
- getCommandSupport().fireReplyReceived(replyCode, reply);
- org.apache.commons.net.ftp.FTPClientTest/examples.ftp.FTPClientExample
- private int __dataConnectionMode—-决定数据传输时的初始化动作由服务器还是客户端进行初始化
- __initDefaults
- __dataConnectionMode = ACTIVE_LOCAL_DATA_CONNECTION_MODE;(数据传输由服务器进行初始化)
- login
- Login to the FTP server using the provided username and password.
- user
- A convenience method to send the FTP USER command to the server,receive the reply, and return the reply code.
- FTPCmd.USER
- pass
- A convenience method to send the FTP PASS command to the server,receive the reply, and return the reply code
- FTPCmd.PASS
- storeFile
- Stores a file on the server using the given name and taking input from the given InputStream.
- _storeFile
- openDataConnection
- if (__dataConnectionMode == ACTIVE_LOCAL_DATA_CONNECTION_MODE)
- port(getReportHostAddress(), server.getLocalPort())
- socket = server.accept();
- else
- socket = socketFactory.createSocket();
- Util.copyStream
- completePendingCommand()
- openDataConnection
- retrieveFile
- Retrieves a named file from the server and writes it to the given OutputStream.
- _retrieveFile
- openDataConnection
- Util.copyStream
- completePendingCommand();
- listFiles
- Using the default system autodetect mechanism, obtain a list of file information for the current working directory.
- 依赖解析引擎按照指定的解析格式和过滤器选出需要的文件列表
- FTPListParseEngine engine = initiateListParsing((String) null, pathname);
- engine.getFiles()
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