[Update] 优化coco内存占用问题 (#153)

* [Update] 优化coco内存占用问题

* [Update] Send unicode

* [Update] Send unicode

* [Bugfix] 修复连接信息bug

coco/app.py

@@ -159,7 +159,7 @@ class Coco:
                             continue
                         # Session已正常关闭
                         if s.closed:
-                            Session.remove_session(s)
+                            Session.remove_session(s.id)
                         else:
                             check_session_idle_too_long(s)
                 except Exception as e:
@@ -182,11 +182,8 @@ class Coco:
                 self.run_httpd()
 
             signal.signal(signal.SIGTERM, lambda x, y: self.shutdown())
-            while True:
-                if self.stop_evt.is_set():
-                    print("Coco receive term signal, exit")
-                    break
-                time.sleep(3)
+            self.lock.acquire()
+            self.lock.acquire()
         except KeyboardInterrupt:
             self.shutdown()
 
@@ -204,8 +201,8 @@ class Coco:
         logger.info("Grace shutdown the server")
         for connection in Connection.connections.values():
             connection.close()
-        time.sleep(1)
         self.heartbeat()
+        self.lock.release()
         self.stop_evt.set()
         self.sshd.shutdown()
         self.httpd.shutdown()

coco/connection.py

@@ -71,9 +71,7 @@ class SSHConnection:
                 )
             transport = ssh.get_transport()
             transport.set_keepalive(300)
-        except (paramiko.AuthenticationException,
-                paramiko.BadAuthenticationType,
-                SSHException) as e:
+        except Exception as e:
             password_short = "None"
             key_fingerprint = "None"
             if system_user.password:
@@ -85,13 +83,11 @@ class SSHConnection:
                 )
 
             logger.error("Connect {}@{}:{} auth failed, password: \
-                                 {}, key: {}".format(
+                          {}, key: {}".format(
                 system_user.username, asset.ip, asset.port,
                 password_short, key_fingerprint,
             ))
             return None, None, error + '\n' + str(e)
-        except (socket.error, socket.timeout) as e:
-            return None, None, error + '\n' + str(e)
         return ssh, sock, None
 
     def get_transport(self, asset, system_user):
@@ -134,48 +130,15 @@ class SSHConnection:
                             password=gateway.password,
                             pkey=gateway.private_key_obj,
                             timeout=config['SSH_TIMEOUT'])
-            except (paramiko.AuthenticationException,
-                    paramiko.BadAuthenticationType,
-                    SSHException, socket.error):
+            except:
                 continue
-            sock = ssh.get_transport().open_channel(
-                'direct-tcpip', (asset.ip, asset.port), ('127.0.0.1', 0)
-            )
-            break
-        return sock
-
-    def get_proxy_sock(self, asset):
-        sock = None
-        domain = app_service.get_domain_detail_with_gateway(
-            asset.domain
-        )
-        if not domain.has_ssh_gateway():
-            return None
-        for i in domain.gateways:
-            gateway = domain.random_ssh_gateway()
-            proxy_command = [
-                "ssh", "-o", "StrictHostKeyChecking=no",
-                "-p", str(gateway.port),
-                "{}@{}".format(gateway.username, gateway.ip),
-                "-W", "{}:{}".format(asset.ip, asset.port), "-q",
-            ]
-
-            if gateway.password:
-                proxy_command.insert(0, "sshpass -p {}".format(gateway.password))
-
-            if gateway.private_key:
-                gateway.set_key_dir(os.path.join(config['ROOT_PATH'], 'keys'))
-                proxy_command.append("-i {}".format(gateway.private_key_file))
-            proxy_command = ' '.join(proxy_command)
-
             try:
-                sock = paramiko.ProxyCommand(proxy_command)
+                sock = ssh.get_transport().open_channel(
+                    'direct-tcpip', (asset.ip, asset.port), ('127.0.0.1', 0)
+                )
                 break
-            except (paramiko.AuthenticationException,
-                    paramiko.BadAuthenticationType, SSHException,
-                    TimeoutError) as e:
-                logger.error(e)
-                continue
+            except:
+                return None
         return sock
 
 
@@ -235,7 +198,6 @@ class TelnetConnection:
                                 self.asset.hostname
                             )
                             logger.info(msg)
-                            self.client.send(b'\r\n' + data)
                             return self.sock, None
                         elif result is False:
                             self.sock.close()

coco/httpd/elfinder/volumes/sftp.py

@@ -66,7 +66,7 @@ class SFTPVolume(BaseVolume):
             data["dirs"] = 1
 
         if self._is_root(path):
-            del data['phash']
+            data.pop('phash', None)
             data['name'] = self.root_name
             data['locked'] = 1
             data['volume_id'] = self.get_volume_id()

coco/interactive.py

@@ -94,12 +94,12 @@ class InteractiveServer:
             _("{T}8) Enter {green}r{end} to refresh your assets and nodes.{R}"),
             _("{T}0) Enter {green}q{end} exit.{R}")
         ]
-        self.client.send(header.format(
+        self.client.send_unicode(header.format(
             title="\033[1;32m", user=self.client.user, end="\033[0m",
             T='\t', R='\r\n\r'
         ))
         for item in menu:
-            self.client.send(item.format(
+            self.client.send_unicode(item.format(
                 green="\033[32m", end="\033[0m",
                 T='\t', R='\r\n\r'
             ))
@@ -112,7 +112,7 @@ class InteractiveServer:
             for i in f:
                 if i.decode('utf-8').startswith('#'):
                     continue
-                self.client.send(i.decode('utf-8').replace('\n', '\r\n'))
+                self.client.send_unicode(i.decode('utf-8').replace('\n', '\r\n'))
 
     def dispatch(self, opt):
         if opt is None:
@@ -152,7 +152,7 @@ class InteractiveServer:
             asset = assets[0]
             if asset.protocol == "rdp" \
                     or asset.platform.lower().startswith("windows"):
-                self.client.send(warning(
+                self.client.send_unicode(warning(
                     _("Terminal does not support login rdp, "
                       "please use web terminal to access"))
                 )
@@ -201,7 +201,7 @@ class InteractiveServer:
 
     def display_assets_paging(self, assets):
         if len(assets) == 0:
-            self.client.send(wr(_("No Assets"), before=0))
+            self.client.send_unicode(wr(_("No Assets"), before=0))
             return
         self.total_count = len(assets)
 
@@ -270,15 +270,15 @@ class InteractiveServer:
         )
         size_list.append(comment_length)
         fake_data.append(_("Comment"))
-        self.client.send(wr(title(format_with_zh(size_list, *fake_data))))
+        self.client.send_unicode(wr(title(format_with_zh(size_list, *fake_data))))
         for index, asset in enumerate(self.results, 1):
             data = [
                 index, asset.hostname, asset.ip,
                 asset.system_users_name_list, asset.comment
             ]
-            self.client.send(wr(format_with_zh(size_list, *data)))
+            self.client.send_unicode(wr(format_with_zh(size_list, *data)))
 
-        self.client.send(wr(title(
+        self.client.send_unicode(wr(title(
             _("Page: {}, Count: {}, Total Page: {}, Total Count: {}").format(
                 self.page, len(self.results), self.total_pages,
                 self.total_count)), before=1)
@@ -286,13 +286,13 @@ class InteractiveServer:
 
     def display_page_bottom_prompt(self):
         msg = wr(_('Tips: Enter the asset ID and log directly into the asset.'), before=1)
-        self.client.send(msg)
+        self.client.send_unicode(msg)
         prompt_page_up = _("Page up: P/p")
         prompt_page_down = _("Page down: Enter|N/n")
         prompt_back = _("BACK: b/q")
         prompts = [prompt_page_up, prompt_page_down, prompt_back]
         prompt = '\t'.join(prompts)
-        self.client.send(wr(prompt, before=1))
+        self.client.send_unicode(wr(prompt, before=1))
 
     def get_user_action(self):
         opt = net_input(self.client, prompt=':')
@@ -365,14 +365,14 @@ class InteractiveServer:
             self.get_user_nodes()
 
         if not self.nodes:
-            self.client.send(wr(_('No Nodes'), before=0))
+            self.client.send_unicode(wr(_('No Nodes'), before=0))
             return
 
         self.node_tree.show(key=lambda node: node.identifier)
-        self.client.send(wr(title(_("Node: [ ID.Name(Asset amount) ]")), before=0))
-        self.client.send(wr(self.node_tree._reader.replace('\n', '\r\n'), before=0))
+        self.client.send_unicode(wr(title(_("Node: [ ID.Name(Asset amount) ]")), before=0))
+        self.client.send_unicode(wr(self.node_tree._reader.replace('\n', '\r\n'), before=0))
         prompt = _("Tips: Enter g+NodeID to display the host under the node, such as g1")
-        self.client.send(wr(title(prompt), before=1))
+        self.client.send_unicode(wr(title(prompt), before=1))
 
     def display_node_assets(self, _id):
         if self.nodes is None:
@@ -380,7 +380,7 @@ class InteractiveServer:
 
         if _id > len(self.nodes) or _id <= 0:
             msg = wr(warning(_("There is no matched node, please re-enter")))
-            self.client.send(msg)
+            self.client.send_unicode(msg)
             self.display_nodes_as_tree()
             return
 
@@ -409,7 +409,7 @@ class InteractiveServer:
             return None
 
         while True:
-            self.client.send(wr(_("Select a login:: "), after=1))
+            self.client.send_unicode(wr(_("Select a login:: "), after=1))
             self.display_system_users(system_users)
             opt = net_input(self.client, prompt="ID> ")
             if opt.isdigit() and len(system_users) > int(opt):
@@ -423,7 +423,7 @@ class InteractiveServer:
 
     def display_system_users(self, system_users):
         for index, system_user in enumerate(system_users):
-            self.client.send(wr("{} {}".format(index, system_user.name)))
+            self.client.send_unicode(wr("{} {}".format(index, system_user.name)))
 
     #
     # Proxy
@@ -432,7 +432,7 @@ class InteractiveServer:
     def proxy(self, asset):
         system_user = self.choose_system_user(asset.system_users_granted)
         if system_user is None:
-            self.client.send(_("No system user"))
+            self.client.send_unicode(_("No system user"))
             return
         forwarder = ProxyServer(self.client, asset, system_user)
         forwarder.proxy()

coco/models.py

@@ -58,7 +58,7 @@ class Connection(object):
             return
         client.close()
         self.__class__.clients_num -= 1
-        del self.clients[tid]
+        self.clients.pop(tid, None)
         logger.info("Client {} leave, total {} now".format(
             client, self.__class__.clients_num
         ))
@@ -83,7 +83,7 @@ class Connection(object):
         if not connection:
             return
         connection.close()
-        del cls.connections[cid]
+        cls.connections.pop(cid, None)
 
     @classmethod
     def get_connection(cls, cid):
@@ -123,13 +123,11 @@ class Client(object):
         return self.chan.fileno()
 
     def send(self, b):
-        if isinstance(b, str):
-            b = b.encode("utf-8")
-        try:
-            return self.chan.send(b)
-        except OSError:
-            self.close()
-            return
+        return self.chan.send(b)
+
+    def send_unicode(self, s):
+        b = s.encode()
+        self.send(b)
 
     @property
     def closed(self):
@@ -256,7 +254,7 @@ class BaseServer(object):
                 break
             elif action == rule.DENY:
                 msg = _("Command `{}` is forbidden ........").format(cmd)
-                self.command_forbidden(msg)
+                data = self.command_forbidden(msg)
                 break
         return data
 
@@ -356,7 +354,7 @@ class BaseServer(object):
         return self.chan.fileno()
 
     def close(self):
-        logger.info("Closed server {}".format(self))
+        logger.info("Close server to {}".format(self))
         self.r_input_output_data_filter(b'')
         self.chan.close()
 
@@ -399,8 +397,10 @@ class Server(BaseServer):
 
     def close(self):
         super(Server, self).close()
-        self.chan.transport.close()
-        logger.debug("Backend server closed")
+        for i in range(5):
+            if not self.chan.transport.is_alive():
+                break
+            self.chan.transport.close()
         if self.sock:
             self.sock.transport.close()
 

coco/proxy.py

@@ -11,7 +11,7 @@ from .connection import SSHConnection, TelnetConnection
 from .service import app_service
 from .config import config
 from .utils import wrap_with_line_feed as wr, wrap_with_warning as warning, \
-     get_logger, net_input, ugettext as _
+     get_logger, net_input, ugettext as _, ignore_error
 
 
 logger = get_logger(__file__)
@@ -48,7 +48,7 @@ class ProxyServer:
             msg = 'System user <{}> and asset <{}> protocol are inconsistent.'.format(
                 self.system_user.name, self.asset.hostname
             )
-            self.client.send(warning(wr(msg, before=1, after=0)))
+            self.client.send_unicode(warning(wr(msg, before=1, after=0)))
             return False
         return True
 
@@ -68,12 +68,19 @@ class ProxyServer:
         self.server = self.get_server_conn()
         if self.server is None:
             return
+        if self.client.closed:
+            self.server.close()
+            return
         session = Session.new_session(self.client, self.server)
         try:
             session.bridge()
         finally:
             Session.remove_session(session.id)
             self.server.close()
+            msg = 'Session end, total {} now'.format(
+                len(Session.sessions),
+            )
+            logger.info(msg)
 
     def validate_permission(self):
         """
@@ -88,7 +95,7 @@ class ProxyServer:
         logger.info("Connect to {}:{} ...".format(self.asset.hostname, self.asset.port))
         self.send_connecting_message()
         if not self.validate_permission():
-            self.client.send(warning(_('No permission')))
+            self.client.send_unicode(warning(_('No permission')))
             server = None
         elif self.system_user.protocol == self.asset.protocol == 'telnet':
             server = self.get_telnet_server_conn()
@@ -97,14 +104,13 @@ class ProxyServer:
         else:
             server = None
         self.connecting = False
-        self.client.send(b'\r\n')
         return server
 
     def get_telnet_server_conn(self):
         telnet = TelnetConnection(self.asset, self.system_user, self.client)
         sock, msg = telnet.get_socket()
         if not sock:
-            self.client.send(warning(wr(msg, before=1, after=0)))
+            self.client.send_unicode(warning(wr(msg, before=1, after=0)))
             server = None
         else:
             server = TelnetServer(sock, self.asset, self.system_user)
@@ -121,24 +127,27 @@ class ProxyServer:
             width=width, height=height
         )
         if not chan:
-            self.client.send(warning(wr(msg, before=1, after=0)))
+            self.client.send_unicode(warning(wr(msg, before=1, after=0)))
             server = None
         else:
             server = Server(chan, sock, self.asset, self.system_user)
         return server
 
     def send_connecting_message(self):
+        @ignore_error
         def func():
             delay = 0.0
-            self.client.send(_('Connecting to {}@{} {:.1f}').format(
-                self.system_user, self.asset, delay)
+            msg = _('Connecting to {}@{} {:.1f}').format(
+                self.system_user, self.asset, delay
             )
+            self.client.send_unicode(msg)
             while self.connecting and delay < config['SSH_TIMEOUT']:
                 if 0 <= delay < 10:
-                    self.client.send('\x08\x08\x08{:.1f}'.format(delay).encode())
+                    self.client.send_unicode('\x08\x08\x08{:.1f}'.format(delay))
                 else:
-                    self.client.send('\x08\x08\x08\x08{:.1f}'.format(delay).encode())
+                    self.client.send_unicode('\x08\x08\x08\x08{:.1f}'.format(delay))
                 time.sleep(0.1)
                 delay += 0.1
+            self.client.send(b'\r\n')
         thread = threading.Thread(target=func)
         thread.start()

coco/recorder.py

@@ -100,7 +100,7 @@ class ReplayRecorder(object):
             return False
 
         if app_service.finish_replay(session_id):
-            logger.info(
+            logger.debug(
                 "Success finished session {}'s replay ".format(session_id)
             )
             return True
@@ -146,7 +146,9 @@ class CommandRecorder(object):
 
     def push_to_server_async(self):
         def func():
-            while not self.stop_evt.is_set():
+            while True:
+                if self.stop_evt.is_set() and self.queue.empty():
+                    break
                 data_set = self.queue.mget(self.batch_size, timeout=self.timeout)
                 size = self.queue.qsize()
                 if size > 0:
@@ -166,7 +168,7 @@ class CommandRecorder(object):
         pass
 
     def session_end(self, session_id):
-        pass
+        self.stop_evt.set()
 
 
 def get_command_recorder():

coco/session.py

@@ -62,7 +62,7 @@ class Session:
             session.close()
             app_service.finish_session(session.to_json())
             app_service.finish_replay(sid)
-            del cls.sessions[sid]
+            cls.sessions.pop(sid, None)
 
     def add_watcher(self, watcher, silent=False):
         """
@@ -74,7 +74,7 @@ class Session:
         """
         logger.debug("Session add watcher: {} -> {} ".format(self.id, watcher))
         if not silent:
-            watcher.send("Welcome to watch session {}\r\n".format(self.id).encode())
+            watcher.send_unicode("Welcome to watch session {}\r\n".format(self.id))
         self.sel.register(watcher, selectors.EVENT_READ)
         self._watchers.append(watcher)
 
@@ -146,7 +146,7 @@ class Session:
         if not msg:
             msg = _("Terminated by administrator")
         try:
-            self.client.send(wr(warn(msg), before=1))
+            self.client.send_unicode(wr(warn(msg), before=1))
         except OSError:
             pass
         self.stop_evt.set()
@@ -166,6 +166,8 @@ class Session:
         self.sel.register(self.server, selectors.EVENT_READ)
         self.sel.register(self.stop_evt, selectors.EVENT_READ)
         self.sel.register(self.client.change_size_evt, selectors.EVENT_READ)
+        if self.client.closed:
+            return
         while not self.is_finished:
             events = self.sel.select(timeout=60)
             for sock in [key.fileobj for key, _ in events]:
@@ -202,7 +204,6 @@ class Session:
         logger.debug("Resize server chan size {}*{}".format(width, height))
         self.server.resize_pty(width=width, height=height)
 
-    @ignore_error
     def close(self):
         if self.closed:
             logger.debug("Session has been closed: {} ".format(self.id))

coco/sshd.py

@@ -119,7 +119,7 @@ class SSHServer:
             else:
                 msg = "Request type `{}:{}` not support now".format(kind, chan_type)
                 logger.error(msg)
-                client.send(msg)
+                client.send_unicode(msg)
         finally:
             connection = Connection.get_connection(client.connection_id)
             connection.remove_client(client.id)

coco/utils.py

@@ -300,7 +300,8 @@ def net_input(client, prompt='Opt> ', sensitive=False, before=0, after=0):
     """
     input_data = []
     parser = TtyIOParser()
-    client.send(wrap_with_line_feed(prompt, before=before, after=after))
+    msg = wrap_with_line_feed(prompt, before=before, after=after)
+    client.send_unicode(msg)
 
     while True:
         data = client.recv(1)
@@ -319,7 +320,7 @@ def net_input(client, prompt='Opt> ', sensitive=False, before=0, after=0):
 
         if data.startswith(b'\x03'):
             # Ctrl-C
-            client.send('^C\r\n{} '.format(prompt).encode())
+            client.send_unicode('^C\r\n{} '.format(prompt))
             input_data = []
             continue
         elif data.startswith(b'\x04'):
@@ -339,7 +340,7 @@ def net_input(client, prompt='Opt> ', sensitive=False, before=0, after=0):
             return option.strip()
         else:
             if sensitive:
-                client.send(len(data) * '*')
+                client.send_unicode((len(data) * '*'))
             else:
                 client.send(data)
             input_data.append(data)
@@ -460,7 +461,6 @@ def ignore_error(func):
             return resp
         except Exception as e:
             logger.error("Error occur: {} {}".format(func.__name__, e))
-            raise e
     return wrapper