Question

我需要我的nodejs应用在远程服务器上运行命令，所以我正在使用此节点ssh库

https://github.com/mscdex/ssh2

由于我需要在同一连接上运行多个命令，因此我使用的是shell函数，而不是示例中的exec函数。

我的代码如下

var Connection = require('ssh2');
var commands = [
    'uptime',
    'ls'
];

var command = "";
var pwSent = false;
var sudosu = false;
var password = 'password';
var conn = new Connection();

conn.on('ready', function () {
    console.log('Connection :: ready');
    conn.shell(function (err, stream) {
        if (err) throw err;
        stream.on('close', function () {
            console.log('Stream :: close');
            conn.end();
        }).on('data', function (data) {

            //handle sudo password prompt
            if (command.indexOf("sudo") !== -1 && !pwSent) {
                //if sudo su has been sent a data event is triggered but the first event is not the password prompt
                //this will ignore the first event and only respond when the prompt is asking for the password
                if (command.indexOf("sudo su") > -1) {
                    sudosu = true;
                }
                if (data.indexOf(":") >= data.length - 2) {
                    pwSent = true;
                    stream.write(password + '\n');
                }
            } else {
                //detect the right condition to send the next command
                var dataLength = data.length
                if (dataLength > 2 && (data.indexOf("$") >= dataLength - 2 || data.indexOf("#") >= dataLength - 2)) {

                    if (commands.length > 0) {
                        command = commands.shift();
                        stream.write(command + '\n');
                    } else {
                        //sudo su requires two exit commands to close the session
                        if (sudosu) {
                            sudosu = false;
                            stream.write('exit\n');
                        } else {
                            stream.end('exit\n');
                        }
                    }
                } else {
                    console.log('STDOUT: ' + data);
                }
            }
        }).stderr.on('data', function (data) {
            console.log('STDERR: ' + data);
        });

        //first command
        command = commands.shift();
        //console.log "first command: " + command;
        stream.write(command + '\n');

    });
}).connect({
    host: 'xx.xxx.xx.xxx',
    port: 22,
    username: 'user',
    password: 'password'
});

但是我只得到某些命令的标准输出，有时根本没有，

Connection :: ready
STDOUT: Last login: Tue Feb 11 20:43:58 2020 from xx.xx.xx.xx

STDOUT: uptime

STDOUT: [user@server ~]# uptime

STDOUT: ls

STDOUT: exit
logout

Stream :: close

我的问题是，是否应该返回终端的完整输出，以及为什么我的代码无法做到这一点

如何使用nodejs ssh库ssh2运行多个命令？

0 个答案: