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dbtransfer.py
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518 lines (428 loc) · 15.1 KB
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#!/usr/bin/python2
# -*- coding: utf-8 -*-
import logging, pickle, json, collections, cgi, urllib
from datetime import datetime
from server import db, request, errors, conf, exposed, utils
from server.bones import *
from server.skeleton import BaseSkeleton, skeletonByKind, listKnownSkeletons
from server.tasks import CallableTask, CallableTaskBase, callDeferred
from server.prototypes.hierarchy import HierarchySkel
from server.prototypes.tree import TreeLeafSkel
from server.render.json.default import DefaultRender
from server.modules.file import decodeFileName
from google.appengine.api import datastore, datastore_types, urlfetch
from google.appengine.ext import blobstore
from google.appengine.ext.blobstore import BlobInfo
from google.appengine.api.images import get_serving_url
from google.appengine.datastore import datastore_query
from itertools import izip
from hashlib import sha256
class DbTransfer( object ):
def _checkKey(self, key, export=True):
"""
Utility function to compare the given key with the keys stored in our conf in constant time
:param key: The key we should validate
:type key: str
:param export: If True, we validate against the export-key, otherwise the import-key
:type export: bool
:returns: True if the key is correct, False otherwise
"""
isValid = True
if not isinstance( key, basestring ):
isValid = False
if export:
expectedKey = conf["viur.exportPassword"]
else:
expectedKey = conf["viur.importPassword"]
if not expectedKey:
isValid = False
if len(key)!=len(expectedKey):
isValid = False
for a,b in izip(str(key),str(expectedKey)):
if a!=b:
isValid = False
return( isValid )
@exposed
def listModules(self, key):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
return( pickle.dumps( listKnownSkeletons() ) )
@exposed
def getCfg(self, module, key ):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
skel = skeletonByKind( module )
assert skel is not None
res = skel()
r = DefaultRender()
return( pickle.dumps( r.renderSkelStructure(res)))
@exposed
def getAppId(self, key, *args, **kwargs):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
return( pickle.dumps( db.Query("SharedConfData").get().key().app() ) ) #app_identity.get_application_id()
def getUploads(self, field_name=None):
"""
Get uploads sent to this handler.
Cheeky borrowed from blobstore_handlers.py - © 2007 Google Inc.
Args:
field_name: Only select uploads that were sent as a specific field.
Returns:
A list of BlobInfo records corresponding to each upload.
Empty list if there are no blob-info records for field_name.
"""
uploads = collections.defaultdict(list)
for key, value in request.current.get().request.params.items():
if isinstance(value, cgi.FieldStorage):
if 'blob-key' in value.type_options:
uploads[key].append(blobstore.parse_blob_info(value))
if field_name:
return list(uploads.get(field_name, []))
else:
results = []
for uploads in uploads.itervalues():
results.extend(uploads)
return results
@exposed
def upload( self, oldkey, *args, **kwargs ):
res = []
for upload in self.getUploads():
fileName = decodeFileName(upload.filename)
if str( upload.content_type ).startswith("image/"):
try:
servingURL = get_serving_url( upload.key() )
except:
servingURL = ""
else:
servingURL = ""
res.append( { "name": fileName,
"size": upload.size,
"mimetype": upload.content_type,
"dlkey": str(upload.key()),
"servingurl": servingURL,
"parentdir": "",
"parentrepo": "",
"weak": False } )
oldkey = decodeFileName(oldkey)
oldKeyHash = sha256(oldkey).hexdigest().encode("hex")
e = db.Entity("viur-blobimportmap", name=oldKeyHash)
e["newkey"] = str(upload.key())
e["oldkey"] = oldkey
e["servingurl"] = servingURL
e["available"] = True
db.Put(e)
return( json.dumps( {"action":"addSuccess", "values":res } ) )
@exposed
def getUploadURL( self, key, *args, **kwargs ):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
return( blobstore.create_upload_url( "/dbtransfer/upload" ) )
@exposed
def storeEntry(self, e, key ):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
entry = pickle.loads( e )
for k in list(entry.keys())[:]:
if isinstance(entry[k],str):
entry[k] = entry[k].decode("UTF-8")
if "key" in entry:
key = db.Key( encoded=entry["key"] )
elif "id" in entry:
key = db.Key(encoded=entry["id"])
else:
raise AttributeError()
dbEntry = db.Entity( kind=key.kind(), parent=key.parent(), id=key.id(), _app=key.app(), name=key.name() )#maybe some more fixes here ?
for k in entry.keys():
if k!="key":
val = entry[k]
#if isinstance(val, dict) or isinstance(val, list):
# val = pickle.dumps( val )
dbEntry[k] = val
if dbEntry.key().id():
# Ensure the Datastore knows that it's id is in use
datastore._GetConnection()._reserve_keys([dbEntry.key()])
db.Put( dbEntry )
@exposed
def hasblob(self, blobkey, key ):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
try:
oldKeyHash = sha256(blobkey).hexdigest().encode("hex")
res = db.Get( db.Key.from_path("viur-blobimportmap", oldKeyHash))
if res:
if "available" in res:
return json.dumps(res["available"])
else:
return json.dumps(True)
except:
pass
return json.dumps(False)
@exposed
def storeEntry2(self, e, key ):
if not self._checkKey( key, export=False):
raise errors.Forbidden()
entry = pickle.loads( e.decode("HEX") )
if not "key" in entry and "id" in entry:
entry["key"] = entry["id"]
for k in list(entry.keys())[:]:
if isinstance(entry[k],str):
entry[k] = entry[k].decode("UTF-8")
key = db.Key( encoded=utils.normalizeKey(entry["key"]) )
dbEntry = db.Entity( kind=key.kind(), parent=key.parent(), id=key.id(), name=key.name() )#maybe some more fixes here ?
for k in entry.keys():
if k!="key":
val = entry[k]
dbEntry[k] = val
db.Put(dbEntry)
if dbEntry.key().id():
# Ensure the Datastore knows that it's id is in use
datastore._GetConnection()._reserve_keys([dbEntry.key()])
try:
skel = skeletonByKind( key.kind() )()
except:
logging.error("Unknown Skeleton - skipping")
skel.fromDB( str(dbEntry.key()) )
skel.refresh()
skel.toDB(clearUpdateTag=True)
@staticmethod
def genDict(obj):
res = {}
for k,v in obj.items():
if not any( [isinstance(v,x) for x in [str, unicode, long, float, datetime, list, dict, bool, type(None)]] ):
logging.error("UNKNOWN TYPE %s" % str(type(v)))
v = unicode( v )
logging.error( v )
if isinstance( v, datastore_types.Text):
v = unicode( v )
elif isinstance(v ,datastore_types.Blob):
continue
elif isinstance(v ,datastore_types.BlobKey):
continue
elif isinstance(v ,datastore_types.ByteString):
v = str( v )
elif isinstance(v ,datastore_types.Category):
v = unicode( v )
elif isinstance(v ,datastore_types.Email):
v = unicode( v )
elif isinstance(v ,datastore_types.EmbeddedEntity):
continue
elif isinstance(v ,datastore_types.GeoPt):
continue
elif isinstance(v ,datastore_types.IM):
continue
elif isinstance(v ,datastore_types.Link):
v = unicode( v )
elif isinstance(v ,datastore_types.PhoneNumber):
v = unicode( v )
elif isinstance(v ,datastore_types.PostalAddress):
v = unicode( v )
elif isinstance(v ,datastore_types.Rating):
v = long( v )
if "datastore" in str(type(v)):
logging.error(str(type(v)))
res[ k ] = v
res["key"] = str( obj.key() )
return( res )
@exposed
def exportDb(self, cursor=None, key=None, *args, **kwargs):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
if cursor:
c = datastore_query.Cursor(urlsafe=cursor)
else:
c = None
q = datastore.Query( None, cursor=c )
r = []
for res in q.Run(limit=5):
r.append( self.genDict( res ) )
return( pickle.dumps( {"cursor": str(q.GetCursor().urlsafe()),"values":r}).encode("HEX"))
@exposed
def exportBlob(self, cursor=None, key=None):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
q = BlobInfo.all()
if cursor is not None:
q.with_cursor( cursor )
r = []
for res in q.run(limit=16):
r.append( str(res.key()) )
return( pickle.dumps( {"cursor": str(q.cursor()),"values":r}).encode("HEX"))
@exposed
def exportBlob2(self, cursor=None, key=None):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
q = BlobInfo.all()
if cursor is not None:
q.with_cursor( cursor )
r = []
for res in q.run(limit=16):
r.append({"key": str(res.key()), "content_type": res.content_type})
return pickle.dumps( {"cursor": str(q.cursor()),"values":r}).encode("HEX")
@exposed
def iterValues(self, module, cursor=None, key=None):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
q = db.Query(module)
if cursor:
q.cursor(cursor)
r = []
for res in q.run(limit=99):
r.append( self.genDict( res ) )
return pickle.dumps({"cursor": str(q.getCursor().urlsafe()), "values": r} )
@exposed
def iterValues2(self, module, cursor=None, key=None):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
q = db.Query(module)
if cursor:
q.cursor(cursor)
r = []
for res in q.run(limit=32):
r.append(self.genDict(res))
return pickle.dumps({"cursor": str(q.getCursor().urlsafe()), "values": r}).encode("HEX")
@exposed
def getEntry(self, module, id, key=None):
if not self._checkKey( key, export=True):
raise errors.Forbidden()
res = db.Get(id)
return pickle.dumps(self.genDict(res))
###### NEW ######
# --- export ---
@CallableTask
class TaskExportKind( CallableTaskBase ):
key = "exportkind"
name = u"Export data kinds to other app"
descr = u"Copies the selected data to the given target application"
direct = True
def canCall( self ):
user = utils.getCurrentUser()
return user is not None and "root" in user["access"]
def dataSkel(self):
skel = BaseSkeleton(cloned=True)
skel.module = selectBone(descr="Kinds", values=listKnownSkeletons(), multiple=True, required=True)
skel.target = stringBone( descr="URL to Target-Application", required=True, defaultValue="https://your-app-id.appspot.com/dbtransfer/storeEntry2" )
skel.importkey = stringBone( descr="Import-Key", required=True)
return skel
def execute(self, module, target, importkey, *args, **kwargs):
for mod in module:
iterExport(mod, target, importkey)
@callDeferred
def iterExport(module, target, importKey, cursor=None):
"""
Processes 100 Entries and calls the next batch
"""
urlfetch.set_default_fetch_deadline(20)
Skel = skeletonByKind( module )
if not Skel:
logging.error("TaskExportKind: Invalid module")
return
query = Skel().all().cursor( cursor )
startCursor = cursor
query.run(100, keysOnly=True)
endCursor = query.getCursor().urlsafe()
exportItems(module, target, importKey, startCursor, endCursor)
if startCursor is None or startCursor != endCursor:
iterExport(module, target, importKey, endCursor)
@callDeferred
def exportItems( module, target, importKey, startCursor, endCursor):
Skel = skeletonByKind( module )
query = Skel().all().cursor( startCursor, endCursor )
for item in query.run(250):
flatItem = DbTransfer.genDict( item )
formFields = {
"e": pickle.dumps(flatItem).encode("HEX"),
"key": importKey
}
result = urlfetch.fetch( url=target,
payload=urllib.urlencode(formFields),
method=urlfetch.POST,
headers={'Content-Type': 'application/x-www-form-urlencoded'})
if startCursor == endCursor:
try:
utils.sendEMailToAdmins("Export of kind %s finished" % module,
"ViUR finished to export kind %s to %s.\n" % (module, target))
except: #OverQuota, whatever
pass
# --- import ---
@CallableTask
class TaskImportKind( CallableTaskBase ):
key = "importkind"
name = u"Import data kinds from other app"
descr = u"Copies the selected data from the given source application"
direct = True
def canCall( self ):
user = utils.getCurrentUser()
return user is not None and "root" in user["access"]
def dataSkel(self):
skel = BaseSkeleton(cloned=True)
skel.module = selectBone(descr="Kinds", values=listKnownSkeletons(), multiple=True, required=True)
skel.source = stringBone(descr="URL to Source-Application", required=True,
defaultValue="https://<your-app-id>.appspot.com/dbtransfer/iterValues2")
skel.exportkey = stringBone(descr="Export-Key", required=True, defaultValue="")
return skel
def execute(self, module, source, exportkey, *args, **kwargs):
for mod in module:
iterImport(mod, source, exportkey)
@callDeferred
def iterImport(module, target, exportKey, cursor=None, amount=0):
"""
Processes 100 Entries and calls the next batch
"""
urlfetch.set_default_fetch_deadline(20)
payload = { "module": module,
"key": exportKey}
if cursor:
payload.update({"cursor": cursor})
result = urlfetch.fetch(url=target,
payload=urllib.urlencode(payload),
method=urlfetch.POST,
headers={'Content-Type': 'application/x-www-form-urlencoded'})
if result.status_code == 200:
res = pickle.loads(result.content.decode("HEX"))
skel = skeletonByKind(module)()
logging.info("%s: %d new entries fetched, total %d entries fetched" % (module, len(res["values"]), amount))
if len(res["values"]) == 0:
try:
utils.sendEMailToAdmins("Import of kind %s finished with %d entities" % (module, amount),
"ViUR finished to import %d entities of "
"kind %s from %s.\n" % (amount, module, target))
except: #OverQuota, whatever
logging.error("Unable to send Email")
return
for entry in res["values"]:
for k in list(entry.keys())[:]:
if isinstance(entry[k], str):
entry[k] = entry[k].decode("UTF-8")
if not "key" in entry:
entry["key"] = entry["id"]
key = db.Key(encoded=utils.normalizeKey(entry["key"]))
# Special case: Convert old module root nodes!!!
if module.endswith("_rootNode") and key.name() and "_modul_" in key.name():
name = key.name().replace("_modul_", "_module_")
else:
name = key.name()
dbEntry = db.Entity(kind=key.kind(), parent=key.parent(), id=key.id(), name=name)
for k in entry.keys():
if k == "key":
continue
dbEntry[k] = entry[k]
# Special case: Convert old module root nodes!!!
if (isinstance(skel, (HierarchySkel, TreeLeafSkel))
and k in ["parentdir", "parententry", "parentrepo"]
and entry[k]):
key = db.Key(encoded=str(entry[k]))
if key.parent():
parent = db.Key(encoded=utils.normalizeKey(key.parent()))
else:
parent = None
if key.id_or_name() and "_modul_" in str(key.id_or_name()):
name = key.id_or_name().replace("_modul_", "_module_")
else:
name = key.id_or_name()
dbEntry[k] = str(db.Key.from_path(key.kind(), name, parent=parent))
db.Put(dbEntry)
skel.fromDB(str(dbEntry.key()))
skel.refresh()
skel.toDB(clearUpdateTag=True)
amount += 1
iterImport(module, target, exportKey, res["cursor"], amount)