diff --git a/spug_api/apps/exec/executors.py b/spug_api/apps/exec/executors.py
index a92602b..2af5297 100644
--- a/spug_api/apps/exec/executors.py
+++ b/spug_api/apps/exec/executors.py
@@ -15,7 +15,7 @@ def exec_worker_handler(job):
 
 class Job:
     def __init__(self, hostname, port, username, pkey, command, token=None):
-        self.ssh_cli = SSH(hostname, port, username, pkey)
+        self.ssh = SSH(hostname, port, username, pkey)
         self.key = f'{hostname}:{port}'
         self.command = command
         self.token = token
@@ -29,15 +29,7 @@ class Job:
             self.rds_cli.expire(self.token, 300)
 
     def send(self, data):
-        message = {'key': self.key, 'type': 'info', 'data': data}
-        self._send(message)
-
-    def send_system(self, data):
-        message = {'key': self.key, 'type': 'system', 'data': data}
-        self._send(message)
-
-    def send_error(self, data):
-        message = {'key': self.key, 'type': 'error', 'data': data}
+        message = {'key': self.key, 'data': data}
         self._send(message)
 
     def send_status(self, code):
@@ -46,17 +38,19 @@ class Job:
 
     def run(self):
         if not self.token:
-            return self.ssh_cli.exec_command(self.command)
-        self.send_system('### Executing')
+            with self.ssh:
+                return self.ssh.exec_command_raw(self.command)
+        self.send('\x1b[36m### Executing ...\x1b[0m\r')
         code = -1
         try:
-            for code, out in self.ssh_cli.exec_command_with_stream(self.command):
-                self.send(out)
+            with self.ssh:
+                for code, out in self.ssh.exec_command_with_stream(self.command):
+                    self.send(out)
         except socket.timeout:
             code = 130
-            self.send_error('### Time out')
+            self.send('\r\n\x1b[31m### Time out\x1b[0m')
         except Exception as e:
             code = 131
-            self.send_error(f'{e}')
+            self.send(f'\r\n\x1b[31m### Exception {e}\x1b[0m')
         finally:
             self.send_status(code)
diff --git a/spug_api/apps/file/views.py b/spug_api/apps/file/views.py
index 2f33b06..aa405f6 100644
--- a/spug_api/apps/file/views.py
+++ b/spug_api/apps/file/views.py
@@ -5,7 +5,7 @@ from django.views.generic import View
 from django_redis import get_redis_connection
 from apps.host.models import Host
 from apps.account.utils import has_host_perm
-from apps.file.utils import FileResponseAfter, parse_sftp_attr
+from apps.file.utils import FileResponseAfter, FileResponse, parse_sftp_attr
 from libs import json_response, JsonParser, Argument
 from functools import partial
 import os
@@ -23,8 +23,8 @@ class FileView(View):
             host = Host.objects.get(pk=form.id)
             if not host:
                 return json_response(error='未找到指定主机')
-            cli = host.get_ssh()
-            objects = cli.list_dir_attr(form.path)
+            with host.get_ssh() as ssh:
+                objects = ssh.list_dir_attr(form.path)
             return json_response([parse_sftp_attr(x) for x in objects])
         return json_response(error=error)
 
@@ -42,10 +42,10 @@ class ObjectView(View):
             if not host:
                 return json_response(error='未找到指定主机')
             filename = os.path.basename(form.file)
-            cli = host.get_ssh().get_client()
-            sftp = cli.open_sftp()
+            ssh_cli = host.get_ssh().get_client()
+            sftp = ssh_cli.open_sftp()
             f = sftp.open(form.file)
-            return FileResponseAfter(cli.close, f, as_attachment=True, filename=filename)
+            return FileResponseAfter(ssh_cli.close, f, as_attachment=True, filename=filename)
         return json_response(error=error)
 
     def post(self, request):
@@ -63,10 +63,10 @@ class ObjectView(View):
             host = Host.objects.get(pk=form.id)
             if not host:
                 return json_response(error='未找到指定主机')
-            cli = host.get_ssh()
             rds_cli = get_redis_connection()
             callback = partial(self._compute_progress, rds_cli, form.token, file.size)
-            cli.put_file_by_fl(file, f'{form.path}/{file.name}', callback=callback)
+            with host.get_ssh() as ssh:
+                ssh.put_file_by_fl(file, f'{form.path}/{file.name}', callback=callback)
         return json_response(error=error)
 
     def delete(self, request):
@@ -80,8 +80,8 @@ class ObjectView(View):
             host = Host.objects.get(pk=form.id)
             if not host:
                 return json_response(error='未找到指定主机')
-            cli = host.get_ssh()
-            cli.remove_file(form.file)
+            with host.get_ssh() as ssh:
+                ssh.remove_file(form.file)
         return json_response(error=error)
 
     def _compute_progress(self, rds_cli, token, total, value, *args):
diff --git a/spug_api/apps/host/views.py b/spug_api/apps/host/views.py
index 2d2c2c0..e2cf399 100644
--- a/spug_api/apps/host/views.py
+++ b/spug_api/apps/host/views.py
@@ -48,11 +48,11 @@ class HostView(View):
                 if form.pkey:
                     private_key = form.pkey
                 elif password:
-                    ssh = SSH(form.hostname, form.port, form.username, password=password)
-                    ssh.add_public_key(public_key)
+                    with SSH(form.hostname, form.port, form.username, password=password) as ssh:
+                        ssh.add_public_key(public_key)
 
-                ssh = SSH(form.hostname, form.port, form.username, private_key)
-                ssh.ping()
+                with SSH(form.hostname, form.port, form.username, private_key) as ssh:
+                    ssh.ping()
             except BadAuthenticationType:
                 return json_response(error='该主机不支持密钥认证，请参考官方文档，错误代码：E01')
             except AuthenticationException:
diff --git a/spug_api/libs/ssh.py b/spug_api/libs/ssh.py
index 4dc7071..9f4d013 100644
--- a/spug_api/libs/ssh.py
+++ b/spug_api/libs/ssh.py
@@ -2,17 +2,21 @@
 # Copyright: (c) <spug.dev@gmail.com>
 # Released under the AGPL-3.0 License.
 from paramiko.client import SSHClient, AutoAddPolicy
-from paramiko.config import SSH_PORT
 from paramiko.rsakey import RSAKey
 from paramiko.ssh_exception import AuthenticationException
 from io import StringIO
+import time
+import re
 
 
 class SSH:
-    def __init__(self, hostname, port=SSH_PORT, username='root', pkey=None, password=None, connect_timeout=10):
-        if pkey is None and password is None:
-            raise Exception('public key and password must have one is not None')
+    def __init__(self, hostname, port=22, username='root', pkey=None, password=None, connect_timeout=10):
+        self.stdout = None
         self.client = None
+        self.channel = None
+        self.sftp = None
+        self.eof = 'Spug EOF 2108111926'
+        self.regex = re.compile(r'Spug EOF 2108111926 \d+[\r\n]?$')
         self.arguments = {
             'hostname': hostname,
             'port': port,
@@ -29,94 +33,141 @@ class SSH:
         key.write_private_key(key_obj)
         return key_obj.getvalue(), 'ssh-rsa ' + key.get_base64()
 
-    def add_public_key(self, public_key):
-        command = f'mkdir -p -m 700 ~/.ssh && \
-        echo {public_key!r} >> ~/.ssh/authorized_keys && \
-        chmod 600 ~/.ssh/authorized_keys'
-        code, out = self.exec_command(command)
-        if code != 0:
-            raise Exception(f'add public key error: {out}')
-
-    def ping(self):
-        with self:
-            return True
-
     def get_client(self):
         if self.client is not None:
             return self.client
+        print('\n~~ ssh start ~~')
         self.client = SSHClient()
         self.client.set_missing_host_key_policy(AutoAddPolicy)
         self.client.connect(**self.arguments)
         return self.client
 
+    def ping(self):
+        self.get_client()
+        return True
+
+    def add_public_key(self, public_key):
+        command = f'mkdir -p -m 700 ~/.ssh && \
+        echo {public_key!r} >> ~/.ssh/authorized_keys && \
+        chmod 600 ~/.ssh/authorized_keys'
+        _, out, _ = self.client.exec_command(command)
+        if out.channel.recv_exit_status() != 0:
+            raise Exception(f'add public key error: {out}')
+
+    def exec_command_raw(self, command):
+        channel = self.client.get_transport().open_session()
+        try:
+            channel.set_combine_stderr(True)
+            channel.exec_command(command)
+            return channel.recv_exit_status(), channel.recv(-1).decode()
+        finally:
+            channel.close()
+
+    def exec_command(self, command, environment=None):
+        channel = self._get_channel()
+        command = self._handle_command(command, environment)
+        channel.send(command)
+        out, exit_code = '', -1
+        for line in self.stdout:
+            if line.startswith(self.eof):
+                exit_code = int(line.rsplit()[-1])
+                break
+            out += line
+        return exit_code, out
+
+    def exec_command_with_stream(self, command, environment=None):
+        channel = self._get_channel()
+        command = self._handle_command(command, environment)
+        channel.send(command)
+        exit_code, line = -1, ''
+        while True:
+            line = channel.recv(8196).decode()
+            print(repr(line))
+            match = self.regex.search(line)
+            if match:
+                exit_code = int(line.rsplit()[-1])
+                line = line[:match.start()]
+                break
+            yield exit_code, line
+        yield exit_code, line
+
+    def get_file(self, file):
+        sftp = self._get_sftp()
+        return sftp.open(file)
+
     def put_file(self, local_path, remote_path):
-        with self as cli:
-            sftp = cli.open_sftp()
-            sftp.put(local_path, remote_path)
-            sftp.close()
-
-    def exec_command(self, command, timeout=1800, environment=None):
-        command = 'set -e\n' + command
-        with self as cli:
-            chan = cli.get_transport().open_session()
-            chan.settimeout(timeout)
-            chan.set_combine_stderr(True)
-            if environment:
-                str_env = ' '.join(self._handle_env(k, v) for k, v in environment.items())
-                command = f'export {str_env} && {command}'
-            chan.exec_command(command)
-            stdout = chan.makefile("rb", -1)
-            return chan.recv_exit_status(), self._decode(stdout.read())
-
-    def exec_command_with_stream(self, command, timeout=1800, environment=None):
-        command = 'set -e\n' + command
-        with self as cli:
-            chan = cli.get_transport().open_session()
-            chan.settimeout(timeout)
-            chan.set_combine_stderr(True)
-            if environment:
-                str_env = ' '.join(self._handle_env(k, v) for k, v in environment.items())
-                command = f'export {str_env} && {command}'
-            chan.exec_command(command)
-            stdout = chan.makefile("rb", -1)
-            out = stdout.readline()
-            while out:
-                yield chan.exit_status, self._decode(out)
-                out = stdout.readline()
-            yield chan.recv_exit_status(), self._decode(out)
+        sftp = self._get_sftp()
+        sftp.put(local_path, remote_path)
 
     def put_file_by_fl(self, fl, remote_path, callback=None):
-        with self as cli:
-            sftp = cli.open_sftp()
-            sftp.putfo(fl, remote_path, callback=callback)
+        sftp = self._get_sftp()
+        sftp.putfo(fl, remote_path, callback=callback)
 
     def list_dir_attr(self, path):
-        with self as cli:
-            sftp = cli.open_sftp()
-            return sftp.listdir_attr(path)
+        sftp = self._get_sftp()
+        return sftp.listdir_attr(path)
 
     def remove_file(self, path):
-        with self as cli:
-            sftp = cli.open_sftp()
-            sftp.remove(path)
+        sftp = self._get_sftp()
+        sftp.remove(path)
 
-    def _decode(self, out: bytes):
-        try:
-            return out.decode()
-        except UnicodeDecodeError:
-            return out.decode('GBK')
+    def _get_channel(self):
+        if self.channel:
+            return self.channel
 
-    def _handle_env(self, key, value):
-        key = key.replace('-', '_')
-        if isinstance(value, str):
-            value = value.replace("'", "'\"'\"'")
-        return f"{key}='{value}'"
+        counter, data = 0, ''
+        self.channel = self.client.invoke_shell()
+        self.channel.send(b'export PS1= && stty -echo && echo Spug execute start\n')
+        while True:
+            if self.channel.recv_ready():
+                data += self.channel.recv(8196).decode()
+                if 'Spug execute start\r\n' in data:
+                    self.stdout = self.channel.makefile('r')
+                    break
+            elif counter >= 100:
+                self.client.close()
+                raise Exception('Wait spug response timeout')
+            else:
+                counter += 1
+                time.sleep(0.1)
+        return self.channel
+
+    def _get_sftp(self):
+        if self.sftp:
+            return self.sftp
+
+        self.sftp = self.client.open_sftp()
+        return self.sftp
+
+    def _break(self):
+        time.sleep(5)
+        command = f'\x03 echo {self.eof} -1\n'
+        self.channel.send(command.encode())
+
+    def _make_env_command(self, environment):
+        if not environment:
+            return None
+        str_envs = []
+        for k, v in environment.items():
+            k = k.replace('-', '_')
+            if isinstance(v, str):
+                v = v.replace("'", "'\"'\"'")
+            str_envs.append(f"{k}='{v}'")
+        str_envs = ' '.join(str_envs)
+        return f'export {str_envs}'
+
+    def _handle_command(self, command, environment):
+        commands = list()
+        commands.append(self._make_env_command(environment))
+        commands.append(command.strip('\n'))
+        commands.append(f'echo {self.eof} $?\n')
+        return '\n'.join(x for x in commands if x).encode()
 
     def __enter__(self):
-        if self.client is not None:
-            raise RuntimeError('Already connected')
-        return self.get_client()
+        self.get_client()
+        return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
+        print('close √')
         self.client.close()
         self.client = None