Added a New Class for handle SSH Connection and paramiko.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26011 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Errors.py

@@ -14,11 +14,20 @@ class DeferredCatalogError(Exception):
         self.error_key = error_key
         self.field_id = context.getRelativeUrl()
 
+class SSHConnectionError(Exception):
+  def __init__(self, message):
+    Exception.__init__(self, message)
+    self.message = message
+
+  def __str__(self):
+    return self.message
+
 class ImmobilisationValidityError(Exception):pass
 class ImmobilisationCalculationError(Exception):pass
 class TransformationRuleError(Exception):pass
 
 allow_class(DeferredCatalogError)
+allow_class(SSHConnectionError)
 allow_class(ImmobilisationValidityError)
 allow_class(ImmobilisationCalculationError)
 allow_class(WorkflowException)

product/ERP5Type/SSHConnection.py

+##############################################################################
+#
+# Copyright (c) 2009 Nexedi SA and Contributors. All Rights Reserved.
+#                    Lucas Carvalho Teixeira <lucas@nexedi.com>
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from Globals import InitializeClass
+from AccessControl import ClassSecurityInfo
+from Products.ERP5Type import Permissions
+from Products.ERP5Type.Errors import SSHConnectionError
+from zLOG import LOG, WARNING
+try:
+  import paramiko
+  from paramiko.ssh_exception import SSHException
+except ImportError:
+  LOG(WARNING, 0, 'The SSHConnection can not be used because Paramiko ' 
+                  'is not installed!')
+import os
+
+class SSHConnection(object):
+  """
+    Holds an SHH connection to a remote SSH server.
+  """
+  security = ClassSecurityInfo()
+
+  def __init__(self, username, host, port, key_path):
+    self.username = username
+    self.host = host
+    self.port = port
+    if os.path.exists(key_path):
+      self.key_path = key_path
+    else:
+      raise ValueError, 'key_path does not exist: %s' % key_path
+
+  security.declarePublic(Permissions.ManagePortal, 'connect')
+  def connect(self):
+    """
+      Get a handle to a remote connection.
+    """
+    self.transport = paramiko.Transport((self.host, int(self.port)))
+    rsa_key = paramiko.RSAKey.from_private_key_file(self.key_path)
+    try:
+      self.transport.connect(username=self.username, pkey=rsa_key)
+    except SSHException:
+      self.transport.close()
+      raise SSHConnectionError(self.host +
+                 ": The svn key is not good for this server," +
+                 " check if the hostname_erp5 is set to your wanted server")
+    else:
+      self.sftp = paramiko.SFTPClient.from_transport(self.transport)
+
+  security.declarePublic(Permissions.ManagePortal, 'close')
+  def close(self):
+    """
+      It must close the sftp and transport connection.
+    """
+    self.sftp.close()
+    self.transport.close()
+
+InitializeClass(SSHConnection)