def _createHard(self, idRev, openedconn):
self._logger.debug ( 'Doing a hard revision on %s', str(idRev) )
deltaList = self._getDeltasSinceEvent ('hardexist', 1, idRev)
self._logger.debug ( "received this deltaList: %s", repr(deltaList) )
if type(deltaList) == int:
self._seterrormsg( 'Could not create internal chain of deltas. '+
'Internal error: ' + str(deltaList) )
return ERR_INTERNAL
# join everything
# first throw away this, but save for later
hardRev = deltaList.pop()
self._logger.debug ( "Generating internal delta" )
try:
listoffiles = [os.path.join(self._deltasdir, str(i)) for i in deltaList]
delta = Deltas.multiOpen(listoffiles)
except:
return ERR_FS
# the last one, now will have hardcopy
openedconn.execute ( '''update revisions set hardexist=1
where idrev=?''' , (idRev,) )
infile = os.path.join(self._hardsdir,str(hardRev))
outfile = os.path.join(self._hardsdir,str(idRev))
delta.patch(infile, outfile)
return 0
def GetDelta(self, idRev, idFromRev):
'''
Get a delta (see rsync algorithm) from the server to jump to a newer
revision. The delta is known to the server or fabricated from some
deltas
@param idRev: "Destination revision"
@param irFromRev: "Origin revision"
@return: Binary information of the petition (asked delta)
'''
with self._conn as c:
# First, check permissions
row = c.execute ("select idfile from revisions where idrev=?",
(idFromRev,) ).fetchone()
if not row:
self._seterrormsg("Unknown origin revision")
return ERR_NOTEXIST
row = c.execute ("select path,isfolder from files where idfile=?",
(row['idfile'],) )
if not row:
self._seterrormsg('Unconsistent files table (database error)')
return ERR_INTERNAL
if row['isfolder']:
self._seterrormsg('Cannot get a delta for a folder')
return ERR_CANNOT
originpath = row['path']
ret = self._checkPerms(originpath, auth.READ)
if ret < 0:
return ret
# Until now everything seems fine, let's check "destination"
revRow = c.execute( "select * from revisions where idrev=?" ,
(idRev,) ).fetchone()
if not revRow:
self._seterrormsg('Unknown destination revision')
return ERR_NOTEXIST
row = c.execute ("select path,isfolder from files where idfile=?" ,
(revRow['idfile']) ).fetchone()
if not row:
self._seterrormsg('Inconsistent files table (database error)')
return ERR_INTERNAL
if row['isfolder']:
self._seterrormsg('Cannot get a delta for a folder')
return ERR_CANNOT
# only check permissions if there is a folder change
if originpath != row['path']:
ret = self._checkperms(row['path'], auth.READ)
if ret < 0:
return ret
#if it's the easy way, we do it the easy way (most likely to hapen)
if (revRow['fromrev'] == idFromRev) and (revRow['fromtype'] == REV_MODIFIED):
#yes, we are lucky!
try:
return Deltas.open(os.path.join(self._deltasdir,str(idRev))).getXMLRPCBinary()
except:
return ERR_FS
else:
# 1st: check that exists a chain of non-deletions between
# this two revisions (save the first hardcopy for later)
deltaList = self._getDeltasSinceEvent ( 'fromrev' , idFromRev , idRev )
if type(deltaList) == int:
return deltaList
# 2nd: try to join everything
try:
listoffiles = [os.path.join(self._deltasdir, str(i)) for i in deltaList]
delta = Deltas.multiOpen(listoffiles)
except:
return ERR_FS
# 3rd: Send delta
return delta.getXMLRPCBinary()
def SendDelta(self, idRev, sentdelta, chksum = None, size = 'NULL'):
'''
Send a delta (see rsync algorithm) to server
@param idRev: The identifier of the origin revision
@param sentdelta: Binary of the delta
@param chksum: Checksum of the file (not the delta)
@param size: Size of the file (not the delta)
@return: Pair of the identifier of the actual revision (once applied
this delta) and the server timestamp of this file.
'''
tsnow = datetime.fromtimestamp(int(time.time()))
# get real checksum
self._logger.debug("Receiving delta, now()=%s", repr(tsnow) )
self._logger.debug("Chksum received: %s", repr(chksum) )
#check if everything is ok
with self._conn as c:
self._logger.debug ( "Getting row of revisions . . ." )
rowRev = c.execute ( "select * from revisions where idrev=?" ,
(idRev,)).fetchone()
if not rowRev:
self._seterrormsg('Unknown revision')
return ERR_NOTEXIST
self._logger.debug ( "Getting row of file information . . ." )
rowFile = c.execute ( "select * from files where idfile=?" ,
(rowRev['idfile'],) ).fetchone()
if not rowFile:
self._seterrormsg('Data not found in the database, '+
'check revision existance')
return ERR_NOTEXIST
# Authentication check
self._checkPerms(rowFile['path'], auth.WRITE)
# Basic checks
if rowFile['lastrev'] != idRev:
self._seterrormsg("Outdated client: not the last revision")
return ERR_OUTDATED
if rowFile['deleted'] == 1:
self._seterrormsg("File is deleted, cannot add revisions to it")
return ERR_DELETED
if rowFile['isfolder']:
self._seterrormsg('The file is a folder, cannot add revisions to it')
return ERR_CANNOT
# Now do really something
self._logger.debug ( "Inserting new revision into database . . ." )
cur = c.execute ( '''insert into revisions
(idfile,uid,timestamp,fromrev,typefrom,chksum,size,hardexist)
values (?,?,?,?,?,?,?,0)''' ,
(rowRev['idfile'], self._getUID(), tsnow,
idRev, REV_MODIFIED, chksum, size ) )
nextRev = cur.lastrowid
c.execute ( '''update files set lastrev=? where idfile=?''' ,
(nextRev , rowRev['idfile'] ) )
self._logger.debug ( "Going to write the delta file" )
#save the delta
delta = Deltas.load(sentdelta)
delta.save(os.path.join(self._deltasdir,str(nextRev)))
self._logger.debug ( "Latest revision: %s" , int(nextRev) )
return nextRev, tsnow
