Java Packet类代码示例

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
private final void sendMessage(int type, int requestId, byte[] msg, int off, int len) throws IOException
{
	int msglen = len + 1;

	if (type != Packet.SSH_FXP_INIT)
		msglen += 4;

	os.write(msglen >> 24);
	os.write(msglen >> 16);
	os.write(msglen >> 8);
	os.write(msglen);
	os.write(type);

	if (type != Packet.SSH_FXP_INIT)
	{
		os.write(requestId >> 24);
		os.write(requestId >> 16);
		os.write(requestId >> 8);
		os.write(requestId);
	}

	os.write(msg, off, len);
	os.flush();
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 *  Modify the attributes of a file. Used for operations such as changing
 *  the ownership, permissions or access times, as well as for truncating a file.
 * 
 * @param path See the {@link SFTPv3Client comment} for the class for more details.
 * @param attr A SFTPv3FileAttributes object. Specifies the modifications to be
 *             made to the attributes of the file. Empty fields will be ignored.
 * @throws IOException
 */
public void setstat(String path, SFTPv3FileAttributes attr) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(path, charsetName);
	tw.writeBytes(createAttrs(attr));

	if (debug != null)
	{
		debug.println("Sending SSH_FXP_SETSTAT...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_SETSTAT, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * 	Modify the attributes of a file. Used for operations such as changing
 *  the ownership, permissions or access times, as well as for truncating a file.
 * 
 * @param handle a SFTPv3FileHandle handle
 * @param attr A SFTPv3FileAttributes object. Specifies the modifications to be
 *             made to the attributes of the file. Empty fields will be ignored.
 * @throws IOException
 */
public void fsetstat(SFTPv3FileHandle handle, SFTPv3FileAttributes attr) throws IOException
{
	checkHandleValidAndOpen(handle);

	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(handle.fileHandle, 0, handle.fileHandle.length);
	tw.writeBytes(createAttrs(attr));

	if (debug != null)
	{
		debug.println("Sending SSH_FXP_FSETSTAT...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_FSETSTAT, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Create a symbolic link on the server. Creates a link "src" that points
 * to "target".
 * 
 * @param src See the {@link SFTPv3Client comment} for the class for more details.
 * @param target See the {@link SFTPv3Client comment} for the class for more details.
 * @throws IOException
 */
public void createSymlink(String src, String target) throws IOException
{
	int req_id = generateNextRequestID();

	/* Either I am too stupid to understand the SFTP draft
	 * or the OpenSSH guys changed the semantics of src and target.
	 */

	TypesWriter tw = new TypesWriter();
	tw.writeString(target, charsetName);
	tw.writeString(src, charsetName);

	if (debug != null)
	{
		debug.println("Sending SSH_FXP_SYMLINK...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_SYMLINK, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Create a symbolic link on the server. Creates a link "src" that points to
 * "target".
 * 
 * @param src
 *            See the {@link SFTPv3Client comment} for the class for more
 *            details.
 * @param target
 *            See the {@link SFTPv3Client comment} for the class for more
 *            details.
 * @throws IOException
 */
public void createSymlink(String src, String target) throws IOException {
	int req_id = generateNextRequestID();

	/*
	 * Either I am too stupid to understand the SFTP draft or the OpenSSH
	 * guys changed the semantics of src and target.
	 */

	TypesWriter tw = new TypesWriter();
	tw.writeString(target, charsetName);
	tw.writeString(src, charsetName);

	if (debug != null) {
		debug.println("Sending SSH_FXP_SYMLINK...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_SYMLINK, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Modify the attributes of a file. Used for operations such as changing the
 * ownership, permissions or access times, as well as for truncating a file.
 * 
 * @param handle
 *            a SFTPv3FileHandle handle
 * @param attr
 *            A SFTPv3FileAttributes object. Specifies the modifications to
 *            be made to the attributes of the file. Empty fields will be
 *            ignored.
 * @throws IOException
 */
public void fsetstat(SFTPv3FileHandle handle, SFTPv3FileAttributes attr)
		throws IOException {
	checkHandleValidAndOpen(handle);

	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(handle.fileHandle, 0, handle.fileHandle.length);
	tw.writeBytes(createAttrs(attr));

	if (debug != null) {
		debug.println("Sending SSH_FXP_FSETSTAT...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_FSETSTAT, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
private final void sendMessage(int type, int requestId, byte[] msg,
		int off, int len) throws IOException {
	int msglen = len + 1;

	if (type != Packet.SSH_FXP_INIT)
		msglen += 4;

	os.write(msglen >> 24);
	os.write(msglen >> 16);
	os.write(msglen >> 8);
	os.write(msglen);
	os.write(type);

	if (type != Packet.SSH_FXP_INIT) {
		os.write(requestId >> 24);
		os.write(requestId >> 16);
		os.write(requestId >> 8);
		os.write(requestId);
	}

	os.write(msg, off, len);
	os.flush();
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Modify the attributes of a file. Used for operations such as changing the
 * ownership, permissions or access times, as well as for truncating a file.
 * 
 * @param path
 *            See the {@link SFTPv3Client comment} for the class for more
 *            details.
 * @param attr
 *            A SFTPv3FileAttributes object. Specifies the modifications to
 *            be made to the attributes of the file. Empty fields will be
 *            ignored.
 * @throws IOException
 */
public void setstat(String path, SFTPv3FileAttributes attr)
		throws IOException {
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(path, charsetName);
	tw.writeBytes(createAttrs(attr));

	if (debug != null) {
		debug.println("Sending SSH_FXP_SETSTAT...");
		debug.flush();
	}

	sendMessage(Packet.SSH_FXP_SETSTAT, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
private final void closeHandle(byte[] handle) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(handle, 0, handle.length);

	sendMessage(Packet.SSH_FXP_CLOSE, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
private void expectStatusOKMessage(int id) throws IOException
{
	byte[] resp = receiveMessage(34000);

	if (debug != null)
	{
		debug.println("Got REPLY.");
		debug.flush();
	}

	TypesReader tr = new TypesReader(resp);

	int t = tr.readByte();

	int rep_id = tr.readUINT32();
	if (rep_id != id)
		throw new IOException("The server sent an invalid id field.");

	if (t != Packet.SSH_FXP_STATUS)
		throw new IOException("The SFTP server sent an unexpected packet type (" + t + ")");

	int errorCode = tr.readUINT32();

	if (errorCode == ErrorCodes.SSH_FX_OK)
		return;

	throw new SFTPException(tr.readString(), errorCode);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Create a new directory.
 * 
 * @param dirName See the {@link SFTPv3Client comment} for the class for more details.
 * @param posixPermissions the permissions for this directory, e.g., "0700" (remember that
 *                         this is octal noation). The server will likely apply a umask.
 * 
 * @throws IOException
 */
public void mkdir(String dirName, int posixPermissions) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(dirName, charsetName);
	tw.writeUINT32(AttribFlags.SSH_FILEXFER_ATTR_PERMISSIONS);
	tw.writeUINT32(posixPermissions);

	sendMessage(Packet.SSH_FXP_MKDIR, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Remove a file.
 * 
 * @param fileName See the {@link SFTPv3Client comment} for the class for more details.
 * @throws IOException
 */
public void rm(String fileName) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(fileName, charsetName);

	sendMessage(Packet.SSH_FXP_REMOVE, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Remove an empty directory. 
 * 
 * @param dirName See the {@link SFTPv3Client comment} for the class for more details.
 * @throws IOException
 */
public void rmdir(String dirName) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(dirName, charsetName);

	sendMessage(Packet.SSH_FXP_RMDIR, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
/**
 * Move a file or directory.
 * 
 * @param oldPath See the {@link SFTPv3Client comment} for the class for more details.
 * @param newPath See the {@link SFTPv3Client comment} for the class for more details.
 * @throws IOException
 */
public void mv(String oldPath, String newPath) throws IOException
{
	int req_id = generateNextRequestID();

	TypesWriter tw = new TypesWriter();
	tw.writeString(oldPath, charsetName);
	tw.writeString(newPath, charsetName);

	sendMessage(Packet.SSH_FXP_RENAME, req_id, tw.getBytes());

	expectStatusOKMessage(req_id);
}
 

import com.trilead.ssh2.sftp.Packet; //导入依赖的package包/类
private void expectStatusOKMessage(int id) throws IOException {
	byte[] resp = receiveMessage(34000);

	if (debug != null) {
		debug.println("Got REPLY.");
		debug.flush();
	}

	TypesReader tr = new TypesReader(resp);

	int t = tr.readByte();

	int rep_id = tr.readUINT32();
	if (rep_id != id)
		throw new IOException("The server sent an invalid id field.");

	if (t != Packet.SSH_FXP_STATUS)
		throw new IOException(
				"The SFTP server sent an unexpected packet type (" + t
						+ ")");

	int errorCode = tr.readUINT32();

	if (errorCode == ErrorCodes.SSH_FX_OK)
		return;

	throw new SFTPException(tr.readString(), errorCode);
}