Synnefo

#!/usr/bin/env python

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from sqlalchemy import Table

from sqlalchemy.sql import select

from binascii import hexlify

from pithos.backends.lib.hashfiler import Blocker

from pithos.aai.models import PithosUser

from django.conf import settings

from pithos.backends.modular import ModularBackend

from lib.transfer import upload

from lib.hashmap import HashMap

from lib.client import Fault

from lib.migrate import Migration

import json

import os

import sys

import hashlib

class ObjectMigration(DataMigration):

    def __init__(self, db, path, block_size, hash_algorithm):

        DataMigration.__init__(self, db, path, block_size, hash_algorithm)

        self.wrapper = ClientWrapper()

    def create_default_containers(self):

        users = PithosUser.objects.all()

        for u in users:

            print '#', u.uniq

            try:

                self.wrapper.create_container('pithos', u.uniq)

                self.wrapper.create_container('trash', u.uniq)

            except NameError, e:

                pass

    def get_path(self, child_id):

        folderTable = Table('folder', self.metadata, autoload=True)

        s = select([folderTable.c.parent_id, folderTable.c.name])

        s = s.where(folderTable.c.id == child_id)

        rp = self.conn.execute(s)

        parent_id, foldername = rp.fetchone()

        if not parent_id:

            return ''

        else:

            return '%s/%s' %(self.get_path(parent_id), foldername)

    def create_objects(self):

        fileheader = Table('fileheader', self.metadata, autoload=True)

        filebody = Table('filebody', self.metadata, autoload=True)

        folder = Table('folder', self.metadata, autoload=True)

        gss_user = Table('gss_user', self.metadata, autoload=True)

        j = filebody.join(fileheader, filebody.c.header_id == fileheader.c.id)

        j = j.join(folder, fileheader.c.folder_id == folder.c.id)

        j = j.join(gss_user, fileheader.c.owner_id == gss_user.c.id)

        s = select([gss_user.c.username,  fileheader.c.folder_id, fileheader.c.name,

                    filebody.c.storedfilepath], from_obj=j)

        rp = self.conn.execute(s)

        objects = rp.fetchall()

        for username, folderid, filename, filepath in objects:

            path = self.get_path(folderid)[1:]

            obj = ''

            #create directory markers

            for f in path.split('/'):

                obj = '%s/%s' %(obj, f) if obj else f

                try:

                    self.wrapper.create_directory_marker('pithos', obj, username)

                except NameError, e:

                    pass

            self.wrapper.set_account(username)

            print '#', username, path, filename

            prefix = '%s/' %path if path else ''

            upload(self.wrapper, filepath, 'pithos', prefix, filename)

class ClientWrapper(object):

    """Wraps client methods used by transfer.upload()

    to ModularBackend methods"""

    def __init__(self):

        options = getattr(settings, 'BACKEND', None)[1]

        self.backend = ModularBackend(*options)

        self.block_size = self.backend.block_size

        self.block_hash = self.backend.hash_algorithm

    def set_account(self, account):

        self.account = account

    def create_container(self, container, account=None, **meta):

        self.backend.put_container(account, account, container, meta)

    def create_directory_marker(self, container, object, account=None):

        md5 = hashlib.md5()

        meta = {'Content-Type':'application/directory',

                'hash':  md5.hexdigest().lower()}

        self.backend.update_object_hashmap(account, account, container, object, 0, [], meta)   

    def create_object_by_hashmap(self, container, object, map):

        hashmap = HashMap(self.block_size, self.block_hash)

        for hash in map['hashes']:

            hashmap.append(hash)

        meta = {'hash':hexlify(hashmap.hash())}

        size = map['bytes']

        try:

            args = [self.account, self.account, container, object, size,  map['hashes'], meta]

            self.backend.update_object_hashmap(*args)

        except IndexError, ie:

            fault = Fault(ie.data, 409)

            raise fault

    def create_object(self, container, object, f):

        hashmap = HashMap(self.block_size, self.block_hash)

        hashmap.load(f)

        map =  [hexlify(x) for x in hashmap]

        meta = {'hash':hashmap.hash()}

        size = hashmap.size

        self.backend.update_object_hashmap(self.account, self.account, container, object, size,  hashmap, meta)

    def retrieve_container_metadata(self, container):

        return {'x-container-block-size':self.block_size,

                'x-container-block-hash':self.block_hash}

if __name__ == "__main__":

    db = ''

    basepath = options = getattr(settings, 'PROJECT_PATH', None)

    params = {'db':db,

              'path':os.path.join(basepath, 'data/pithos/'),

              'block_size':(4 * 1024 * 1024),

              'hash_algorithm':'sha256'}

    ot = ObjectMigration(**params)

    ot.create_default_containers()

    ot.create_objects()