Plink通过C#返回不需要的字符

问题描述

通过C#使用Plink时，在结果前后都出现不需要的字符:

I am getting unwanted characters before and after my results when using Plink via C#:

命令:

ls -l */informatica/tgtdynamicparams*.out | grep vaulttest| grep 'Sep  1'|awk '{print $9}' | sort

Linux结果:

aaco/informatica/tgtdynamicparams2269885_CHECK_REF_COMPANY.out
cdph/informatica/tgtdynamicparams2225704_CDPHDRUGRECON.out
cdph/informatica/tgtdynamicparams2225704_CDPHELIGRECON.out
merh/informatica/tgtdynamicparams3454321_OPEN_TEST.out
merh/informatica/tgtdynamicparams3454322_OPEN_TEST2.out

通过Plink结果

C#:

C# via Plink result:

[01;32mcdph/informatica/tgtdynamicparams2225704_CDPHDRUGRECON.out[0m
[01;32mcdph/informatica/tgtdynamicparams2225704_CDPHELIGRECON.out[0m
[01;32mmerh/informatica/tgtdynamicparams3454321_OPEN_TEST.out[0m
[01;32mmerh/informatica/tgtdynamicparams3454322_OPEN_TEST2.out[0m
[0m[01;32maaco/informatica/tgtdynamicparams2269885_CHECK_REF_COMPANY.out[0m

我已经尝试了以下方法，但没有任何运气:

I've tried the following without any luck:

StandardOutputEncoding = Encoding.UTF8
StandardOutputEncoding = Encoding.ASCII
StandardOutputEncoding = Encoding.DEFAULT

这是我正在使用的代码.我已经收到类似问题的回复，建议使用ssh.net，但我不允许使用它必须是Plink.

Here is the code I'm using. I have seen replies for similar problems suggesting use of ssh.net but I am not permitted to use that it has to be Plink.

private string GetFileNames = @"ls -l */informatica/tgtdynamicparams*.out
                             | grep vaulttest| grep 'Sep  1'
                             | awk '{print $9}'
                             | sort";

GetProcessesCommands = new [] {
                               @"cd /src/trs/runjobs",
                               GetFileNames
                              };
Request(ServerName, UserName, Password, GetProcessesCommands);

调用此:

private void Request(string remoteHost, string userName, string password, IEnumerable<string> lstCommands)
{
    try
    {
        var psi = new ProcessStartInfo
        {
            FileName = FormInformatiKill.PropFile.Plink,
            Arguments = string.Format("-ssh {0}@{1} -pw {2}", userName, remoteHost, password),
            RedirectStandardError = true,
            RedirectStandardOutput = true,
            RedirectStandardInput = true,
            UseShellExecute = false,
            CreateNoWindow = true,
            StandardOutputEncoding = Encoding.UTF8
        };

        var p = Process.Start(psi);
        _mObjLock = new object();
        _mBlnDoRead = true;

        if( p == null ) return;
        AsyncReadFeedback(p.StandardOutput); // start the async read of stdout

        var strw = p.StandardInput;

        foreach( var cmd in lstCommands )
        {
            strw.WriteLine( cmd ); // send commands
        }
        strw.WriteLine("exit"); // send exit command at the end

        p.WaitForExit(); // block thread until remote operations are done
    }
    catch (Exception e)
    {
        Console.WriteLine(e.Message);
        Console.WriteLine(e.StackTrace);
    }
}

private void AsyncReadFeedback(StreamReader strr)
{
    var trdr = new Thread(ReadFeedback);
    trdr.Start(strr);
}

private void ReadFeedback(object objStreamReader)
{
    var strr = (StreamReader) objStreamReader;
    while (!strr.EndOfStream && _mBlnDoRead)
    {
        var line = strr.ReadLine();
        // lock the feedback buffer (since we don't want some messy stdout/err mix string in the end)
        lock (_mObjLock)
        {
            if( line != null ) ListOfFilesResults.Add(line.Trim());
        }
    }
}

我已经尝试过Trim().我什至花时间只是试图删除我不想要的字符，但是似乎有更多的可能性我无法为其编写代码.

I've tried Trim(). I even spent time just trying to remove the characters I didn't want, but there seems to be more possibilities than I can code for.

推荐答案

这些都是 ANSI转义代码.

虽然使用--color=never可能会有所帮助，但根本的问题在于，运行Plink的方式(使用标准输入提供命令)会使其使用交互式会话.如今，大多数系统都配置为使用精美的格式来进行交互式会话的目录列表(和其他内容)，以使其更加人性化.

While using the --color=never may help, the root problem is that, the way you run Plink (feeding the command using a standard input), you make it use an interactive session. Most systems nowadays are configured to use a fancy formatting for directory listing (and other stuff) for interactive sessions to be more human friendly.

在您的情况下，没有人参与，因此您应该使用非交互式会话.

While in your case, no human is involved, so you should use a non-interactive session.

有两种方法可以做到这一点:

There are two ways to do that:

• 要么在Plink命令行上提供命令(而不是使用标准输入来提供命令)，例如:

• Either provide the command on Plink command-line (instead of feeding it using a standard input), like:

plink.exe -ssh [email protected] -pw password "ls -l ... | grep ... | sort"

此语法隐式强制使用非交互模式.

This syntax implicitly forces a non-interactive mode.

或使用 -T开关明确强制使用非交互模式:

Or use the -T switch to explicitly force the non-interactive mode:

plink.exe -ssh [email protected] -pw password -T

此语法使您可以继续使用标准输入来馈送命令.

This syntax allows you to keep feeding the command using the standard input.

使用非交互式会话(在正确配置的系统上)，可以避免交互式会话的所有麻烦(而不仅仅是--color).因此，这是一种更通用的解决方案.

Using the non-interactive session (on a properly configured system) you avoid all the troubles of the interactive sessions (not just the --color). So it's a way more generic solution.

如果这对您不起作用，那一定是因为您的服务器配置错误并且为ls设置了别名，以便即使在非交互式会话中也可以使用--color.

If this does not work for you, it must be because your server is misconfigured and aliases the ls to use the --color even for non-interactive sessions.

如果无法修复服务器，建议您同时使用非交互式会话(以避免其他可能的麻烦)和--color=never开关.比使用--color=never更好的解决方案是使用unalias ls.

If you cannot fix the server, I suggest you use both non-interactive session (to avoid other possible troubles) and the --color=never switch. Possibly better solution than using the --color=never is using the unalias ls.

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