diff --git a/external_file_location/__init__.py b/external_file_location/__init__.py
new file mode 100644
index 00000000..258d23ad
--- /dev/null
+++ b/external_file_location/__init__.py
@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2014 Akretion (http://www.akretion.com).
+#   @author Sébastien BEAU <sebastien.beau@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from . import attachment
+from . import location
+from . import task
+from . import tasks
+
diff --git a/external_file_location/__openerp__.py b/external_file_location/__openerp__.py
new file mode 100644
index 00000000..04c1063f
--- /dev/null
+++ b/external_file_location/__openerp__.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+{
+ 'name': 'external_file_location',
+ 'version': '0.0.1',
+ 'author': 'Akretion',
+ 'website': 'www.akretion.com',
+ 'license': 'AGPL-3',
+ 'category': 'Generic Modules',
+ 'description': """
+ File exchange system with multiple protocol (SFTP, FTP, Filestore)
+ """,
+ 'depends': [
+     'base',
+     'ir_attachment_metadata',
+ ],
+ 'data': [
+     'attachment_view.xml',
+     'menu.xml',
+     'location_view.xml',
+     'task_view.xml',
+     'cron.xml',
+ ],
+ 'installable': True,
+ 'application': True,
+}
diff --git a/external_file_location/abstract_task.py b/external_file_location/abstract_task.py
new file mode 100755
index 00000000..c9397318
--- /dev/null
+++ b/external_file_location/abstract_task.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from base64 import b64encode
+
+
+class AbstractTask(object):
+
+    def create_file(self, filename, data):
+        ir_attachment_id = self.env['ir.attachment'].create(
+                {
+                    'name': filename,
+                    'datas': b64encode(data),
+                    'datas_fname': filename,
+                    'task_id': self.task.id,
+                    'location_id': self.task.location_id.id,
+                    'external_hash': self.ext_hash
+                }
+                )
+        return ir_attachment_id
diff --git a/external_file_location/attachment.py b/external_file_location/attachment.py
new file mode 100644
index 00000000..410da1db
--- /dev/null
+++ b/external_file_location/attachment.py
@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2014 Akretion (http://www.akretion.com).
+#   @author Sébastien BEAU <sebastien.beau@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from openerp import models, fields
+
+
+class IrAttachment(models.Model):
+    _inherit = 'ir.attachment'
+
+    sync_date = fields.Datetime()
+    state = fields.Selection([
+        ('pending', 'Pending'),
+        ('failed', 'Failed'),
+        ('done', 'Done'),
+        ], readonly=False, required=True, default='pending')
+    state_message = fields.Text()
+    task_id = fields.Many2one('external.file.task', string='Task')
+    location_id = fields.Many2one('external.file.location', string='Location',
+                                  related='task_id.location_id', store=True
+                                  )
diff --git a/external_file_location/attachment_view.xml b/external_file_location/attachment_view.xml
new file mode 100644
index 00000000..d545c346
--- /dev/null
+++ b/external_file_location/attachment_view.xml
@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+
+	    <record id="view_attachment_improved_form" model="ir.ui.view">
+	        <field name="model">ir.attachment</field>
+	    	<field name="inherit_id" ref="base.view_attachment_form" />
+	        <field name="arch" type="xml">
+		    <field name="url" position="after">
+			    <field name="sync_date"/>
+			    <field name="state"/>
+			    <field name="state_message"/>
+                <field name="task_id"/>
+                <field name="location_id"/>
+	    	    </field>
+	        </field>
+	    </record>
+
+        <record id="view_external_attachment_tree" model="ir.ui.view">
+            <field name="model">ir.attachment</field>
+            <field name="arch" type="xml">
+                <tree string="Attachments" >
+                    <field name="name"/>
+                    <field name="datas_fname"/>
+                    <field name="task_id"/>
+                    <field name="location_id"/>
+                    <field name="type"/>
+                    <field name="create_date"/>
+                    <field name="state"/>
+                </tree>
+            </field>
+        </record>
+
+        <record id="view_external_attachment_search" model="ir.ui.view">
+            <field name="model">ir.attachment</field>
+            <field name="arch" type="xml">
+                <search string="Attachments">
+                    <field name="name" filter_domain="['|', ('name','ilike',self), ('datas_fname','ilike',self)]" string="Attachment"/>
+                    <field name="create_date"/>
+                    <filter icon="terp-stage"
+                        string="URL"
+                        domain="[('type','=','url')]"/>
+                    <filter icon="terp-stock_align_left_24"
+                        string="Binary"
+                        domain="[('type','=','binary')]"/>
+                    <separator/>
+                    <filter name="my_documents_filter" 
+                        string="My Document(s)"
+                        icon="terp-personal"
+                        domain="[('create_uid','=',uid)]"
+                        help="Filter on my documents"/>
+                    <field name="create_uid"/>
+                    <field name="type"/>
+                    <filter string="Pending" domain="[('state', '=', 'pending')]"/>
+                    <filter string="Failed" domain="[('state', '=', 'failed')]"/>
+                    <filter string="Done" domain="[('state', '=', 'done')]"/>
+                    <group expand="0" string="Group By">
+                        <filter string="Owner" icon="terp-personal" domain="[]" context="{'group_by':'create_uid'}"/>
+                        <filter string="Type" icon="terp-stock_symbol-selection" domain="[]" context="{'group_by':'type'}" groups="base.group_no_one"/>
+                        <filter string="Company" icon="terp-gtk-home" domain="[]" context="{'group_by':'company_id'}" groups="base.group_multi_company"/>
+                        <filter string="Creation Month" icon="terp-go-month" domain="[]" context="{'group_by':'create_date'}"/>
+                        <filter string="State" domain="[]" context="{'group_by': 'state'}"/>
+                    </group>
+                </search>
+            </field>
+        </record>
+
+        <record id="action_attachment" model="ir.actions.act_window">
+            <field name="name">Attachments</field>
+            <field name="type">ir.actions.act_window</field>
+            <field name="res_model">ir.attachment</field>
+            <field name="view_type">form</field>
+            <field name="view_mode">kanban,tree,form</field>
+            <field name="view_id" eval="False"/>
+            <field name="domain">[('task_id', '!=', False)]</field>
+            <field name="search_view_id" ref="view_external_attachment_search"/>
+        </record>
+
+        <record id="ir_attachment_view1" model="ir.actions.act_window.view">
+            <field eval="20" name="sequence"/>
+            <field name="view_mode">kanban</field>
+            <field name="view_id" ref="mail.view_document_file_kanban"/>
+            <field name="act_window_id" ref="action_attachment"/>
+        </record>
+
+        <record id="ir_attachment_view2" model="ir.actions.act_window.view">
+            <field eval="10" name="sequence"/>
+            <field name="view_mode">tree</field>
+            <field name="view_id" ref="view_external_attachment_tree"/>
+            <field name="act_window_id" ref="action_attachment"/>
+        </record>
+
+        <menuitem id="menu_ir_attachment" 
+            parent="menu_file_exchange"
+            sequence="20"
+            action="action_attachment"/>
+
+    </data>
+</openerp>
diff --git a/external_file_location/cron.xml b/external_file_location/cron.xml
new file mode 100644
index 00000000..a18f5f6a
--- /dev/null
+++ b/external_file_location/cron.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        
+        <record model="ir.cron" id="cronjob_run_exchange_tasks">
+            <field name='name'>Run file exchange tasks</field>
+            <field name='interval_number'>30</field>
+            <field name='interval_type'>minutes</field>
+            <field name="numbercall">-1</field>
+            <field name="active">True</field>
+            <field name="doall" eval="False" />
+            <field name="model">external.file.task</field>
+            <field name="function">_run</field>
+            <field name="args">([])</field>
+        </record>
+
+    </data>
+</openerp>
diff --git a/external_file_location/helper.py b/external_file_location/helper.py
new file mode 100644
index 00000000..3e0b93a6
--- /dev/null
+++ b/external_file_location/helper.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Author: Joel Grand-Guillaume
+# Copyright 2011-2012 Camptocamp SA
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+def itersubclasses(cls, _seen=None):
+    """
+    itersubclasses(cls)
+    Generator over all subclasses of a given class, in depth first order.
+    >>> list(itersubclasses(int)) == [bool]
+    True
+    >>> class A(object): pass
+    >>> class B(A): pass
+    >>> class C(A): pass
+    >>> class D(B,C): pass
+    >>> class E(D): pass
+    >>>
+    >>> for cls in itersubclasses(A):
+    ... print(cls.__name__)
+    B
+    D
+    E
+    C
+    >>> # get ALL (new-style) classes currently defined
+    >>> [cls.__name__ for cls in itersubclasses(object)] #doctest: +ELLIPSIS
+    ['type', ...'tuple', ...]
+    """
+    #import pdb; pdb.set_trace()
+    if not isinstance(cls, type):
+        raise TypeError('itersubclasses must be called with '
+               'new-style classes, not %.100r' % cls
+               )
+    if _seen is None:
+        _seen = set()
+    try:
+        subs = cls.__subclasses__()
+    except TypeError: # fails only when cls is type
+        subs = cls.__subclasses__(cls)
+    for sub in subs:
+        if sub not in _seen:
+            _seen.add(sub)
+            yield sub
+            for sub in itersubclasses(sub, _seen):
+                yield sub
diff --git a/external_file_location/location.py b/external_file_location/location.py
new file mode 100644
index 00000000..8d26e462
--- /dev/null
+++ b/external_file_location/location.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from openerp import models, fields
+from abstract_task import AbstractTask
+from helper import itersubclasses
+
+class Location(models.Model):
+    _name = 'external.file.location'
+    _description = 'Description'
+
+    name = fields.Char(string='Name')
+    protocol = fields.Selection(selection='_get_protocol')
+    address = fields.Char(string='Address')
+    port = fields.Integer()
+    login = fields.Char()
+    password = fields.Char()
+    task_ids = fields.One2many('external.file.task', 'location_id')
+
+
+    def _get_protocol(self):
+        res = []
+        for cls in itersubclasses(AbstractTask):
+            if not cls._synchronize_type:
+                cls_info = (cls._key, cls._name)
+                res.append(cls_info)
+        return res
+
diff --git a/external_file_location/location_view.xml b/external_file_location/location_view.xml
new file mode 100644
index 00000000..da11c6d6
--- /dev/null
+++ b/external_file_location/location_view.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+
+        <record id="view_location_form" model="ir.ui.view">
+            <field name="model">external.file.location</field>
+            <field name="arch" type="xml">
+                <form string="Location" version="7.0">
+                    <sheet>
+                        <group col="4">
+                            <div class="oe_title" style="width: 390px;" colspan="4">
+                                <label class="oe_edit_only" for="name" string="Location Name"/>
+                                <h1><field name="name" class="oe_inline"/></h1>
+                            </div>
+                            <newline/>
+                            <field name="protocol" colspan="2"/>
+                            <newline/>
+                            <field name="address" colspan="2"/>
+                            <field name="port" colspan="2"/>
+                            <field name="login" colspan="2"/>
+                            <field name="password" password="1" colspan="2"/>
+                            <separator string="Tasks" colspan="4"/>
+                            <field name="task_ids" colspan="4" nolabel="1">
+                                <tree>
+                                    <field name="name"/>
+                                    <field name="method"/>
+                                    <field name="filename"/>
+                                    <field name="filepath"/>
+                                    <button name="run" type="object" string="Run" icon="gtk-execute"/>
+                                </tree>
+                            </field>
+                        </group>
+                    </sheet>
+                </form>
+            </field>
+        </record>
+
+        <record id="view_location_tree" model="ir.ui.view">
+            <field name="model">external.file.location</field>
+            <field name="arch" type="xml">
+                <tree string="Location">
+                    <field name="name" select="1"/>
+                    <field name="protocol"/>
+                    <field name="address"/>
+                    <field name="login"/>
+                </tree>
+            </field>
+        </record>
+
+        <record id="action_location" model="ir.actions.act_window">
+            <field name="name">Locations</field>
+            <field name="type">ir.actions.act_window</field>
+            <field name="res_model">external.file.location</field>
+            <field name="view_type">form</field>
+            <field name="view_id" eval="False"/>
+        </record>
+
+        <menuitem id="menu_ir_location" 
+            parent="menu_file_exchange"
+            sequence="20"
+            action="action_location"/>
+
+    </data>
+</openerp>
diff --git a/external_file_location/menu.xml b/external_file_location/menu.xml
new file mode 100644
index 00000000..553ae688
--- /dev/null
+++ b/external_file_location/menu.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        
+        <menuitem id="menu_file_exchange" 
+            parent="base.menu_administration"
+            sequence="20"
+            name="File exchange"
+            />
+
+    </data>
+</openerp>
diff --git a/external_file_location/task.py b/external_file_location/task.py
new file mode 100644
index 00000000..c7803056
--- /dev/null
+++ b/external_file_location/task.py
@@ -0,0 +1,88 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from openerp import models, fields, api
+from helper import itersubclasses
+from abstract_task import AbstractTask
+
+
+class Task(models.Model):
+    _name = 'external.file.task'
+    _description = 'Description'
+
+    name = fields.Char()
+    method = fields.Selection(selection='_get_method')
+    method_type = fields.Char()
+    filename = fields.Char()
+    filepath = fields.Char()
+    location_id = fields.Many2one('external.file.location', string='Location')
+    attachment_ids = fields.One2many('ir.attachment', 'task_id',
+                                    string='Attachment')
+    delete_file = fields.Boolean(string='Delete file')
+    move_file = fields.Boolean(string='Move file')
+    move_path = fields.Char(string='Move path')
+
+    def _get_method(self):
+        res = []
+        for cls in itersubclasses(AbstractTask):
+            if cls._synchronize_type:
+                cls_info = (cls._key + '_' + cls._synchronize_type,
+                            cls._name + ' ' + cls._synchronize_type)
+                res.append(cls_info)
+        return res
+
+    @api.onchange('method')
+    def onchage_method(self):
+        if 'import' in self.method:
+            self.method_type = 'import'
+        elif 'export' in self.method:
+            self.method_type = 'export'
+
+    @api.model
+    def _run(self, domain=None):
+        if not domain:
+            domain = []
+        tasks = self.env['external.file.task'].search(domain)
+        tasks.run()
+
+    @api.one
+    def run(self):
+        for cls in itersubclasses(AbstractTask):
+            if cls._synchronize_type and \
+              cls._key + '_' + cls._synchronize_type == self.method:
+                method_class = cls
+        config = {
+                'host': self.location_id.address,
+                'user': self.location_id.login,
+                'pwd': self.location_id.password,
+                'port': self.location_id.port,
+                'allow_dir_creation': False,
+                'file_name': self.filename,
+                'path': self.filepath,
+                'attachment_ids': self.attachment_ids,
+                'task': self,
+                'move_path': self.move_path,
+                'delete_file': self.delete_file,
+                'move_file': self.move_file,
+                }
+        conn = method_class(self.env, config)
+        conn.run()
diff --git a/external_file_location/task_view.xml b/external_file_location/task_view.xml
new file mode 100644
index 00000000..2281ef8b
--- /dev/null
+++ b/external_file_location/task_view.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+
+        <record id="view_task_form" model="ir.ui.view">
+            <field name="model">external.file.task</field>
+            <field name="arch" type="xml">
+                <form string="Tasks" version="7.0">
+                    <sheet>
+                        <field name="method_type" invisible="1"/>
+                        <group col="4">
+                            <div class="oe_title" style="width: 390px;" colspan="4">
+                                <label class="oe_edit_only" for="name" string="Product Name"/>
+                                <h1><field name="name" class="oe_inline"/></h1>
+                            </div>
+                            <field name="method" colspan="2"/>
+                            <field name="location_id" colspan="2"/>
+                            <field name="filename" colspan="4" attrs="{'invisible':[('method_type','!=','import')]}"/>
+                            <field name="filepath" colspan="4" />
+                            <field name="move_file" colspan="2" attrs="{'invisible':[('method_type','!=','import')]}"/>
+                            <field name="move_path" colspan="2" attrs="{'invisible':['|', ('move_file','=',False), ('method_type','!=','import')]}"/>
+                            <field name="delete_file" colspan="2" attrs="{'invisible':[('method_type','!=','import')]}"/>
+                            <group attrs="{'invisible':[('method_type','!=','export')]}" colspan="4">
+                                <separator string="Attachments" colspan="4" />
+                                <field name="attachment_ids" colspan="4" nolabel="1"/>
+                            </group>
+                            <button name="run" type="object" string="Run" icon="gtk-execute"/>
+                        </group>
+                    </sheet>
+                </form>
+            </field>
+        </record>
+
+        <record id="view_task_tree" model="ir.ui.view">
+            <field name="model">external.file.task</field>
+            <field name="arch" type="xml">
+                <tree string="Tasks" >
+                    <field name="name" select="1"/>
+                    <field name="method"/>
+                    <field name="filename"/>
+                    <field name="filepath"/>
+                    <button name="run" type="object" string="Run" icon="gtk-execute"/>
+                </tree>
+            </field>
+        </record>
+
+        <record id="action_task" model="ir.actions.act_window">
+            <field name="name">Tasks</field>
+            <field name="type">ir.actions.act_window</field>
+            <field name="res_model">external.file.task</field>
+            <field name="view_type">form</field>
+            <field name="view_id" eval="False"/>
+        </record>
+
+        <menuitem id="menu_external_file_task" 
+            parent="menu_file_exchange"
+            sequence="20"
+            action="action_task"/>
+
+    </data>
+</openerp>
diff --git a/external_file_location/tasks/__init__.py b/external_file_location/tasks/__init__.py
new file mode 100644
index 00000000..d3e1509a
--- /dev/null
+++ b/external_file_location/tasks/__init__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from . import ftp
diff --git a/external_file_location/tasks/filestore.py b/external_file_location/tasks/filestore.py
new file mode 100755
index 00000000..302fc733
--- /dev/null
+++ b/external_file_location/tasks/filestore.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from ..backend import AbstractTask
+import sys
+import os
+from tempfile import TemporaryFile
+
+
+class FileStore(AbstractTask):
+    _key = "filestore"
+    _name = "Filestore"
+    _synchronize_type = None
+
+    def __init__(self, config):
+        # super(FilestoreConnection, self).__init__(host, user, pwd, port, allow_dir_creation)
+        self.host = config.get('host', '')
+        self.user = config.get('user', '')
+        self.pwd = config.get('pwd', '')
+        self.port = config.get('port', '')
+        self.allow_dir_creation = config.get('allow_dir_creation', '')
+        self.filename = config.get('filename', '')
+        self.path = config.get('path', '')
+
+    def connect(self):
+        return NotImplemented
+
+    def close(self):
+        return NotImplemented
+
+    def get(self):
+        if self.path:
+            filepath = "{}/{}".format(self.path, self.filename)
+        else:
+            filepath = self.filename
+        return open(filepath, 'r+b')
+
+    def put(self):
+        if self.path:
+            filepath = "{}/{}".format(self.path, self.filename)
+        else:
+            filepath = self.filename
+        output = open(filepath, 'w+b')
+        return True
+
+    def search(self):
+        if self.path:
+            filepath = "{}/{}".format(self.path, self.filename)
+        else:
+            filepath = self.filename
+        connection_list_result = os.listdir(filepath)
+        return [x for x in connection_list_result if filename in x]
+
+
+class ImportFileStore(FileStore):
+    _synchronize_type = "import"
+
+
+    def run():
+        self.connect()
+        file = self.get(self.filename)
+        self.close()
+        return file
+
+class ExportFileStore(FileStore):
+    _synchronize_type = "export"
+
+
+    def run():
+        self.connect()
+        self.put(self.filename)
+        self.close()
+
diff --git a/external_file_location/tasks/ftp.py b/external_file_location/tasks/ftp.py
new file mode 100644
index 00000000..218acc3e
--- /dev/null
+++ b/external_file_location/tasks/ftp.py
@@ -0,0 +1,182 @@
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+#    Copyright (C) 2014 initOS GmbH & Co. KG (<http://www.initos.com>).
+#    @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from ..abstract_task import AbstractTask
+from base64 import b64decode
+import ftputil
+import ftputil.session
+from ftputil.error import FTPIOError
+import logging
+from base64 import b64encode
+import hashlib
+_logger = logging.getLogger(__name__)
+
+
+class FtpTask(AbstractTask):
+
+    _key = 'ftp'
+    _name = 'FTP'
+    _synchronize_type = None
+
+    def __init__(self, env, config):
+        self.env = env
+        self.host = config.get('host', '')
+        self.user = config.get('user', '')
+        self.pwd = config.get('pwd', '')
+        self.port = config.get('port', '')
+        self.allow_dir_creation = config.get('allow_dir_creation', '')
+        self.file_name = config.get('file_name', '')
+        self.path = config.get('path', '.')
+        self.move_path = config.get('move_path', '')
+        self.move_file = config.get('move_file', False)
+        self.delete_file = config.get('delete_file', False)
+        self.attachment_ids = config.get('attachment_ids', False)
+        self.task = config.get('task', False)
+        self.ext_hash = False
+
+
+class FtpImportTask(FtpTask):
+    """FTP Configuration options:
+     - host, user, password, port
+     - download_directory:  directory on the FTP server where files are
+                            downloaded from
+     - move_directory:  If present, files will be moved to this directory
+                        on the FTP server after download.
+     - delete_files:  If true, files will be deleted on the FTP server
+                      after download.
+    """
+
+    _synchronize_type = 'import'
+
+    def _handle_new_source(self, ftp_conn, download_directory, file_name,
+                           move_directory):
+        """open and read given file into create_file method,
+           move file if move_directory is given"""
+        with ftp_conn.open(self._source_name(download_directory, file_name),
+                           "rb") as fileobj:
+            data = fileobj.read()
+        return self.create_file(file_name, data)
+
+    def _source_name(self, download_directory, file_name):
+        """helper to get the full name"""
+        return download_directory + '/' + file_name
+
+    def _move_file(self, ftp_conn, source, target):
+        """Moves a file on the FTP server"""
+        _logger.info('Moving file %s %s' % (source, target))
+        ftp_conn.rename(source, target)
+
+    def _delete_file(self, ftp_conn, source):
+        """Deletes a file from the FTP server"""
+        _logger.info('Deleting file %s' % source)
+        ftp_conn.remove(source)
+
+    @staticmethod
+    def _get_hash(file_name, ftp_conn):
+        with ftp_conn.open(file_name, 'rb') as f:
+            return hashlib.md5(f.read()).hexdigest()
+
+    def run(self):
+        port_session_factory = ftputil.session.session_factory(
+            port=self.port)
+        with ftputil.FTPHost(self.host, self.user,
+                             self.pwd,
+                             session_factory=port_session_factory) as ftp_conn:
+
+            path = self.path or '.'
+            file_list = ftp_conn.listdir(path)
+            downloaded_files = []
+            for ftpfile in file_list:
+                source_name = self._source_name(path, self.file_name)
+                if ftp_conn.path.isfile(source_name) and \
+                        ftpfile == self.file_name:
+                    self.ext_hash = self._get_hash(source_name, ftp_conn)
+                    self._handle_new_source(
+                            ftp_conn,
+                            path,
+                            self.file_name,
+                            self.move_path)
+                    downloaded_files.append(self.file_name)
+
+            # Move/delete files only after all files have been processed.
+            if self.delete_file:
+                for ftpfile in downloaded_files:
+                    self._delete_file(ftp_conn,
+                                      self._source_name(path,
+                                                        ftpfile))
+            elif self.move_path:
+                if not ftp_conn.path.exists(self.move_path):
+                    ftp_conn.mkdir(self.move_path)
+                for ftpfile in downloaded_files:
+                    self._move_file(
+                        ftp_conn,
+                        self._source_name(path, ftpfile),
+                        self._source_name(self.move_path, ftpfile))
+
+
+class FtpExportTask(FtpTask):
+    """FTP Configuration options:
+     - host, user, password, port
+     - upload_directory:  directory on the FTP server where files are
+                          uploaded to
+    """
+
+    _synchronize_type = 'export'
+
+    def _handle_existing_target(self, ftp_conn, target_name, filedata):
+        raise Exception("%s already exists" % target_name)
+
+    def _handle_new_target(self, ftp_conn, target_name, filedata):
+        try:
+            with ftp_conn.open(target_name, mode='wb') as fileobj:
+                fileobj.write(filedata)
+                _logger.info('wrote %s, size %d', target_name, len(filedata))
+            self.attachment_id.state = 'done'
+            self.attachment_id.state_message = ''
+        except FTPIOError:
+            self.attachment_id.state = 'failed'
+            self.attachment_id.state_message = (
+                'The directory doesn\'t exist or had insufficient rights')
+
+    def _target_name(self, ftp_conn, upload_directory, filename):
+        return upload_directory + '/' + filename
+
+    def _upload_file(self, host, port, user, pwd, path, filename, filedata):
+        upload_directory = path or '.'
+        port_session_factory = ftputil.session.session_factory(port=port)
+        with ftputil.FTPHost(host, user, pwd,
+                             session_factory=port_session_factory) as ftp_conn:
+            target_name = self._target_name(ftp_conn,
+                                            upload_directory,
+                                            filename)
+            if ftp_conn.path.isfile(target_name):
+                self._handle_existing_target(ftp_conn, target_name, filedata)
+            else:
+                self._handle_new_target(ftp_conn, target_name, filedata)
+
+    def run(self, async=True):
+        for attachment in self.attachment_ids:
+            if attachment.state in ('pending', 'failed'):
+                self.attachment_id = attachment
+                self._upload_file(self.host, self.port, self.user, self.pwd,
+                                  self.path,
+                                  attachment.datas_fname,
+                                  b64decode(attachment.datas))
diff --git a/external_file_location/tasks/ftp_backup.py b/external_file_location/tasks/ftp_backup.py
new file mode 100755
index 00000000..7316b81f
--- /dev/null
+++ b/external_file_location/tasks/ftp_backup.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+
+import sys
+import os
+from tempfile import TemporaryFile
+from ftplib import FTP
+
+class FTPConnection(object):
+
+    def __init__(self, host, user, pwd, port=None, allow_dir_creation=False):
+        super(FTPConnection, self).__init__(host, user, pwd, port, allow_dir_creation)
+        if not port:
+            self.port = 21
+        self.protocol = "FTP"
+
+    def connect(self):
+        self.connection = FTP(self.location, self.port)
+        self.connection.login(self.user, self.pwd)
+
+    def close(self):
+        self.connection.close()
+
+    def get(self, filename, path=None):
+        if path:
+            filepath = "{}/{}".format(path, filename)
+        else:
+            filepath = filename
+        outfile = TemporaryFile('w+b')
+        self.connection.retrbinary('RETR ' + filepath, outfile.write)
+        return outfile
+
+    def put(self, fileobject, filename, path=None):
+        if path:
+            filepath = "{}/{}".format(path, filename)
+        else:
+            filepath = filename
+        self.connection.storbinary('STOR ' + filepath, fileobject)
+        return True
+
+    def search(self, filename, path=None):
+        if path:
+            filepath = "{}/{}".format(path, filename)
+        else:
+            filepath = filename
+        connection_list_result = self.connection.nlst()
+        return [x for x in connection_list_result if filename in x]
+
+
+    def move(self, filename, oldpath, newpath):
+        self.connection.rename(
+                os.path.join(oldpath, filename),
+                os.path.join(newpath, filename)
+                )
+
+    def rename(self, oldfilename, newfilename, path=None):
+        return NotImplemented
diff --git a/external_file_location/tasks/sftp.py b/external_file_location/tasks/sftp.py
new file mode 100755
index 00000000..4d40b896
--- /dev/null
+++ b/external_file_location/tasks/sftp.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+import paramiko
+import os
+from tempfile import TemporaryFile
+
+
+class SFTPConnection(AbstractConnection):
+
+    def __init__(self, host, user, pwd, port=None, allow_dir_creation=False):
+        super(SFTPConnection, self).__init__(host, user, pwd, port, allow_dir_creation)
+        if not port:
+            self.port = 22
+        self.protocol = "STFP"
+    
+    def connect(self):
+        self.ssh = paramiko.SSHClient()
+        self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        self.ssh.connect(self.host, self.port, self.user, self.pwd, compress=True)
+        self.connection = self.ssh.open_sftp()
+
+    def close(self):
+        self.connection.close()
+
+    def get(self, filename, path=None):
+        if path:
+            remotefile = "{}/{}".format(path, filename)
+        else:
+            remotefile = filename
+        localfile = filename
+        newfile = open(filename, 'w')
+        self.connection.getfo(remotefile, newfile)
+        return newfile
+
+    def put(self, fileobject, filename, path=None):
+        if path:
+            remotefile = "{}/{}".format(path, filename)
+        else:
+            remotefile = filename
+        if self.allow_dir_creation:
+            self.connection.mkdirs(path)
+        oldfile = open(fileobj, 'r')
+        self.connection.putfo(oldfile, remotefile)
+
+    def search(self, filename, path=None):
+        if path:
+            self.connection.chdir(path)
+        file_list = self.connection.listdir()
+        return [x for x in file_list if filename in x]
+
+    def move(self, filename, oldpath, newpath):
+        self.connection.rename(os.path.join(oldpath, filename), os.path.join(newpath, filename))
+
+    def rename(self, oldfilename, newfilename, path=None):
+        if not path:
+            path = ''
+        self.connection.rename(os.path.join(path, oldfilename), os.path.join(path, newfilename))
diff --git a/ir_attachment_metadata/__init__.py b/ir_attachment_metadata/__init__.py
new file mode 100644
index 00000000..3e53cd60
--- /dev/null
+++ b/ir_attachment_metadata/__init__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from . import attachment
diff --git a/ir_attachment_metadata/__openerp__.py b/ir_attachment_metadata/__openerp__.py
new file mode 100644
index 00000000..0e6560df
--- /dev/null
+++ b/ir_attachment_metadata/__openerp__.py
@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+{'name': 'ir_attachment_metadata',
+ 'version': '0.0.1',
+ 'author': 'Akretion',
+ 'website': 'www.akretion.com',
+ 'license': 'AGPL-3',
+ 'category': 'Generic Modules',
+ 'description': """
+ Add some useful field to ir.attachment object like:
+ internal and external hash for coherence verification
+ """,
+ 'depends': [
+     'base',
+ ],
+ 'data': [
+     'attachment_view.xml',
+ ],
+ 'installable': True,
+ 'application': False,
+}
+
+
+
+
diff --git a/ir_attachment_metadata/attachment.py b/ir_attachment_metadata/attachment.py
new file mode 100644
index 00000000..3944ee02
--- /dev/null
+++ b/ir_attachment_metadata/attachment.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+#   Module for OpenERP
+#   Copyright (C) 2015 Akretion (http://www.akretion.com).
+#   @author Valentin CHEMIERE <valentin.chemiere@akretion.com>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as
+#   published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+
+from openerp import models, fields, api, _
+from openerp.exceptions import Warning
+import hashlib
+from base64 import b64decode
+
+
+class IrAttachment(models.Model):
+    _inherit = 'ir.attachment'
+
+    internal_hash = fields.Char(store=True, compute='_compute_hash')
+    external_hash = fields.Char()
+
+    @api.depends('datas', 'external_hash')
+    def _compute_hash(self):
+        if self.datas:
+            self.internal_hash = hashlib.md5(b64decode(self.datas)).hexdigest()
+        if self.external_hash and self.internal_hash != self.external_hash:
+            raise Warning(_('File corrupted'),
+                          _("Something was wrong with the retreived file, "
+                              "please relaunch the task."))
diff --git a/ir_attachment_metadata/attachment_view.xml b/ir_attachment_metadata/attachment_view.xml
new file mode 100644
index 00000000..04b10055
--- /dev/null
+++ b/ir_attachment_metadata/attachment_view.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+
+	    <record id="view_attachment_improved_form" model="ir.ui.view">
+	        <field name="model">ir.attachment</field>
+	    	<field name="inherit_id" ref="base.view_attachment_form" />
+	        <field name="arch" type="xml">
+		    <field name="url" position="after">
+			    <field name="internal_hash"/>
+			    <field name="external_hash"/>
+	    	    </field>
+	    		
+	        </field>
+	    </record>
+
+    </data>
+</openerp>