利用SharpSsh遠程執行linux的shell命令 (2011-07-26 14:38:02)

SharpSSH是一個C#的開源項目，可以利用SSH連接linux系統。并執行shell等命令。

而SharpSSH提供的例子的輸入輸出都是定向到console。因此不容易從其中取出它的結果。

因此需要對源碼進行一定的修改，從而得到我們想要的結果。

執行SSH前，應確保linux主機上的服務已啟動,命令：service sshdstart

引用工程：SharpSSH

源代碼：

static voidMain(string[]args)

{

try

{

//Create a new JSch instance

JSch jsch = newJSch();

//Prompt for username and serverhost

Console.WriteLine("Please input hostname:");

String host = Console.ReadLine();

Console.WriteLine("Please input username:");

String user = Console.ReadLine();

Console.WriteLine("Please input password:");

String pwd = Console.ReadLine();

//Create a new SSH session

Session session = jsch.getSession(user, host,22);

// username and password will be givenvia UserInfo interface.

UserInfo ui = newShellUserInfo();

ui.setPassword(pwd);

session.setUserInfo(ui);

//Connect to remote SSHserver

session.connect();

//Open a new Shell channel on the SSHsession

Channel channel = session.openChannel("shell");

//Redirect standard I/O to the SSHchannel

channel.setInputStream(Console.OpenStandardInput());

channel.setOutputStream(Console.OpenStandardOutput());

//Connect the channel

channel.connect();

Console.WriteLine("-- Shell channel is connected using the {0}cipher", session.getCipher());

//Wait till channel is closed

while(!channel.isClosed())

{

System.Threading.Thread.Sleep(500);

}

//Disconnect from remoteserver

channel.disconnect();

session.disconnect();

}

catch (Exception e)

{

Console.WriteLine(e);

}

}

以上只能將輸入輸出定向到console。

修改：打開SharpSSH中的SshStream.cs，加一個方法

public voidset_OutputStream(Streamstream){m_channel.setOutputStream(stream);}

接下來封裝一個類：

class ShellHelp

{

System.IO.MemoryStreamoutputstream = newMemoryStream();

Tamir.SharpSsh.SshStream inputstream = null;

Channel channel = null;

Session session = null;

///

/// 命令等待標識

///

string waitMark = "]#";

///

/// 打開連接

///

///

///

///

///

public bool OpenShell(string host, string username, string pwd)

{

try

{

Redirect standard I/O to the SSHchannel

inputstream = newTamir.SharpSsh.SshStream(host, username, pwd);

///我手動加進去的方法。。為了讀取輸出信息

inputstream.set_OutputStream(outputstream);

return inputstream != null;

}

catch{throw;}

}

///

/// 執行命令

///

///

public bool Shell(string cmd)

{

if (inputstream == null) returnfalse;

string initinfo =GetAllString();

inputstream.Write(cmd);

inputstream.Flush();

string currentinfo =GetAllString();

while (currentinfo ==initinfo)

{

System.Threading.Thread.Sleep(100);

currentinfo = GetAllString();

}

return true;

}

///

/// 獲取輸出信息

///

///

public string GetAllString()

{

string outinfo = Encoding.UTF8.GetString(outputstream.ToArray());

//等待命令結束字符

while(!outinfo.Trim().EndsWith(waitMark))

{

System.Threading.Thread.Sleep(200);

outinfo = Encoding.UTF8.GetString(outputstream.ToArray());

}

outputstream.Flush();

returnoutinfo.ToString();

}

///

/// 關閉連接

///

public void Close()

{

if (inputstream != null) inputstream.Close();

}

}

注意：string?waitMark?=?"]#";?在這里是用來標識命令是否執行完成的，，執行完成就會在后面輸出這個字符，，有時也有可能是"]$"

接下來執行shell命令：

static voidMain(string[] args)

{

Console.WriteLine("Please input hostname:");

String host = Console.ReadLine();

Console.WriteLine("Please input username:");

String user = Console.ReadLine();

Console.WriteLine("Please input password:");

String pwd = Console.ReadLine();

ShellHelp shell = newShellHelp();

//連接linux成功

if (shell.OpenShell(host, user,pwd))

{

shell.Shell("df-h");//執行獲取命令

//shell.Shell("dmidecode");//執行獲取命令

string info =shell.GetAllString();//獲取返回結果

Console.WriteLine(info);

shell.Close();//關閉連接

}

Console.ReadLine();

}

轉自：http://blog.sina.com.cn/s/blog_6ffbfc880100tt85.html

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