PHP non-blocking SSH client example_PHP tutorial

In my previous work, I had to deal with foreign servers. The delay and packet loss problems were sometimes so serious that they were intolerable. Entering a SQL statement was very laborious. I searched Google but couldn't find a non-blocking SSH client. PHP has SSH2 extension. In theory, a command-based SSH client can be implemented using standard input and output. This solves the inconvenience caused by network problems, so I developed a PHP Non-blocking SSH client

Value:

• Based on commands, it solves the problem of network delay and packet loss to the greatest extent.
• The test passed under windows and Linux.

Inadequacy:

• No auto-complete function
• No other functions such as sftp and scp
• No color and bold
• In some cases the display is not perfect
• Because it is basically not used now, we will not improve it for the time being.

Linux running effect

Effect of running under windows

Because it is a class in the framework, some common functions (such as debug_print()) need to be provided by yourself, so I will not rewrite them here

The code is as follows

Copy code

class FSSH{ private $conn; private $shell;  /** * key=String password authentication, key=array('pub'=>,'pri'=>,'type'=>,'phrase'=>) key authentication * There are two types of key authentication: ssh-rsa, ssh-dss * $host[addr]=String address,$host['fp']=array() server fingerprint ​*/  function __construct($host,$user,$key){   if(empty($host['addr'])){    debug_print('Host cant't be empty',E_USER_ERROR);   }   if(empty($host['fp'])){    debug_print('finger print is not specified',E_USER_ERROR);   }   $this->stdin=fopen('php://stdin','r');   $this->stdout=fopen('php://stdout','w');   if(false!==strpos($host['addr'],':')){    $temp=explode(':',$host['addr']);    $host['addr']=$temp[0];    $port=$temp[1];   }else{    $port=22;   }   if(is_string($key) || empty($key['type'])){    $methods=null;   }else{    $methods=array('hostkey'=>$key['type']);   }   $conn=ssh2_connect($host['addr'],$port,$methods,array('disconnect'=>array($this,'disconnect')));   $fp=ssh2_fingerprint($conn,SSH2_FINGERPRINT_MD5);   $success=false;   $fpOK=false;   if(in_array($fp,$host['fp'])){    $fpOK=true;   }else{    fwrite($this->stdout,"$fpnIs fingerprint OK ?(y/n)");    $input=strtolower(stream_get_line($this->stdin,1));    if($input=='y'){     $fpOK=true;    }else{     $fpOK=false;    }   }   if($fpOK){    if(is_array($key)){     if (ssh2_auth_pubkey_file($conn,$user,$key['pub'],$key['pri'],$key['phrase'])){      $success=true;     }else{      debug_print('Public Key Authentication Failed',E_USER_ERROR);     }    }elseif(is_string($key)){     if(ssh2_auth_password($conn,$user,$key)){      $success=true;     }else{      debug_print('Password Authentication Failed',E_USER_ERROR);     }    }   }else{    debug_print('Fingerprint is invalid',E_USER_ERROR);   }   if($success){    $this->conn=$conn;    $this->shell=ssh2_shell($conn,null,null,1024);   }   return $success;  }  function shell(){   //最后一条命令   $last='';   //先结束shell，再结束while   $signalTerminate=false;   while(true){    $cmd=$this->fread($this->stdin);    $out=stream_get_contents($this->shell,1024);    if(!empty($out) and !empty($last)){     $l1=strlen($out);     $l2=strlen($last);     $l=$l1>$l2?$l2:$l1;     $last=substr($last,$l);     $out=substr($out,$l);    }    echo ltrim($out);    if($signalTerminate){     break;    }    if(in_array(trim($cmd),array('exit'))){     $signalTerminate=true;    }    if(!empty($cmd)){     $last=$cmd;     fwrite($this->shell,$cmd);    }   }  }  //解决windows命令行的读取问题，没有别的办法了。  private function fread($fd){   static $data='';   $read = array($fd);   $write = array();   $except = array();   $result = stream_select($read,$write,$except,0,1000);   if($result === false)    debug_print('stream_select failed',E_USER_ERROR);   if($result !== 0){    $c= stream_get_line($fd,1);    if($c!=chr(13))     $data.=$c;    if($c==chr(10)){     $t=$data;     $data='';     return $t;    }   }  }  function __destruct(){   fclose($this->stdin);   fclose($this->stdout);   $this->disconnect();  }  private function disconnect(){   if(is_resource($this->conn)){    unset($this->conn);    fclose($this->shell);   }  } }

demo

 代码如下

代码如下	复制代码
//$ssh=new FSSH(array('addr'=>'x.x.x.x:22','fp'=>array('')),'tunnel',array('pub'=>'E:Identity.pub','pri'=>'E:Identity','type'=>'ssh-rsa')); $ssh=new FSSH(array('addr'=>'192.168.2.205','fp'=>array('54ECC700B844DCF0D40554A56C57C01E')),'root','123456'); $ssh->shell();

复制代码

//$ssh=new FSSH(array('addr'=>'x.x.x.x:22','fp'=>array('')),'tunnel',array('pub'=>'E:Identity.pub','pri'=>'E:Identity','type'=>'ssh-rsa')); $ssh=new FSSH(array('addr'=>'192.168.2.205','fp'=>array('54ECC700B844DCF0D40554A56C57C01E')),'root','123456');

$ssh->shell();

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TechArticle之前工作中必须和国外服务器打交道，延迟和丢包问题有时候非常严重，已经到了不可忍受的地步，输入一条sql都是很费劲的事情。google搜...