def backup(self):
if debug_fds: fds_open = fds_open_now()
#Metoda SourceDir.incremental_backup() je zmatocna.
#Ak neexistuje self.target_object (teda stara cielova verzia aktualneho adresara),
#metodu initial_backup() treba volat na podobjekt v adresari
#(vytvoreny pomocou SourceObject.create(next_path,self.target,None)),
#nie na (self teda na aktualny adresar). Takto spraveny incremental_backup()
#bude potom v pripade neexistujuceho target_object fungovat rovnako
#ako initial_backup() a teda nemusite mat dve metody
#(ale podobne treba spravit aj incremental_backup() v SourceFile a SourceLnk).
main_dict = {}
for F in os.listdir(self.source_path):
if debug_fds: fds_open_in_loop = fds_open_now()
next_path = os.path.join(self.source_path, F)
if self.target_object != None:
oldF = self.target_object.get_object(F)
else:
oldF = None
new_object = SourceObject.create(next_path, self.store, oldF)
if new_object != None:
side_dict = new_object.backup()
main_dict[F] = side_dict
if debug_fds: check_fds(fds_open_in_loop, F)
#print main_dict
hash = self.pickling(main_dict)
if debug_fds: check_fds(fds_open)
return self.make_side_dict(hash)
def backup(self):
if debug_fds: fds_open = fds_open_now()
if self.target_object != None:
if not self.compare_stat(self.lstat, self.target_object.lstat): # ak sa nerovnaju lstaty
if (self.lstat.st_mtime == self.target_object.lstat.st_mtime
and self.lstat.st_size == self.target_object.lstat.st_size):
if verbose : print("Lnk mTime bez zmeny. return novy side_dict(stary_hash) !")
# rovanky mtime
# vyrob side dict stary hash + aktualny lstat
#tu incIndex???
if debug_fds: check_fds(fds_open)
return self.make_side_dict(self.target_object.side_dict['hash']) #stary hash
else:
# rozny mtime
link_target = os.readlink(self.source_path)
new_hash = hashlib.sha1(link_target).hexdigest() # spocitaj hash a porovnaj
if (new_hash == self.target_object.side_dict[self.file_name]['hash']
or os.path.exists(self.store.get_object_path(new_hash))):
if verbose : print("Lnk mTime zmeneny. return novy side_dict(novy_hash) !")
#tu incIndex???
if debug_fds: check_fds(fds_open)
return self.make_side_dict(new_hash)
else:
if verbose : print("Lnk Novy object zalohy !")
if debug_fds: check_fds(fds_open)
return self.make_side_dict(self.make_lnk())
else:
if verbose : print("Lnk mTime zmeneny. rovnake meta")
#tu incIndex???
if debug_fds: check_fds(fds_open)
return self.target_object.side_dict # ak sa rovnaju staty
else:
if verbose : print("Lnk Novy object zalohy.")
if debug_fds: check_fds(fds_open)
return self.make_side_dict(self.make_lnk())
def backup(self):
if debug_fds: fds_open = fds_open_now()
# ak sa zmenil mtime, tak ma zmysel pozerat sa na obsah suboru
# inak sa mozno zmenili zaujimave metadata
if self.target_object != None:
if not self.compare_stat(self.lstat, self.target_object.lstat): # ak sa nerovnaju lstaty
if (self.lstat.st_mtime == self.target_object.lstat.st_mtime
and self.lstat.st_size == self.target_object.lstat.st_size):
if verbose : print("Lnk mTime bez zmeny. return novy side_dict(stary_hash) !")
# rovanky mtime
# vyrob side dict stary hash + aktualny lstat
if debug_fds: check_fds(fds_open)
return self.make_side_dict(self.target_object.side_dict['hash']) #stary hash
else:
# rozny mtime
new_hash = self.store.get_hash(self.source_path) # spocitaj hash a porovnaj
# ak je to delta treba zrekonstruovat koncovy subor a pytat sa na ten?
if (new_hash == self.target_object.side_dict['hash']
or os.path.exists(self.store.get_object_path(new_hash))):
if verbose : print("File mTime zmeneny. return novy side_dict(novy_hash) !")
if debug_fds: check_fds(fds_open)
return self.make_side_dict(new_hash)
else:
if verbose : print("File Novy object zalohy.")
hash = self.save_file(self.target_object.side_dict['hash'])
if debug_fds: check_fds(fds_open)
return self.make_side_dict(hash)
else:
if verbose : print("Lnk mTime zmeneny. rovnake meta")
#tu incIndex???
if debug_fds: check_fds(fds_open)
return self.target_object.side_dict # ak sa rovnaju staty
else:
if verbose : print("File Novy object zalohy.")
hash = self.save_file()
if debug_fds: check_fds(fds_open)
return self.make_side_dict(hash)
def save_file(self, source_path, name, previous_hash = None, block_size = constants.CONST_BLOCK_SIZE):
if debug_fds: fds_open = fds_open_now()
file_hash = hashlib.sha1()
target_file = self.get_journal_object_path(name)
target_file_header = self.get_journal_object_header_path(name)
if not previous_hash == None:
previous_type = self.get_object_type(previous_hash)
if previous_type == "gz\n" or previous_type == "delta\n" :
previous_file = self.get_object_file_header(previous_hash, "rb")
previous_file.readline()
previous_file.readline()
sig_size = previous_file.readline()
sig_data = previous_file.read(int(sig_size))
deltaProcess = subprocess.Popen(['rdiff', 'delta', '-', source_path], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
deltaProcess.stdin.write(sig_data)
deltaProcess.stdin.close()
with open(target_file, "wb") as TF: #bol gzip
while True:
deltaData = deltaProcess.stdout.read(16)
if deltaData:
file_hash.update(deltaData)
TF.write(deltaData)
else:
with open(target_file_header, "wb") as THF:
THF.write("delta\n")
THF.write("signature\n")
sigProcess = subprocess.Popen(['rdiff', 'signature', source_path], stdout=subprocess.PIPE)
signature, signatureErr = sigProcess.communicate()
if (signatureErr is None):
THF.write(str(len(signature)))
THF.write("\n")
THF.write(signature)
else:
THF.write(str(0))
THF.write("\n")
THF.write("previous\n")
THF.write(previous_hash)
THF.close()
self.file_rename(target_file, file_hash.hexdigest() + ".data")
self.file_rename(target_file_header, file_hash.hexdigest() + ".meta")
break
TF.close()
self.write_to_journal("move " + self.get_journal_object_path(file_hash.hexdigest()) + " " + os.path.join(self.store_path, "objects", file_hash.hexdigest() + ".data"))
self.write_to_journal("move " + self.get_journal_object_header_path(file_hash.hexdigest()) + " " + os.path.join(self.store_path, "objects", file_hash.hexdigest() + ".meta"))
if debug_fds: check_fds(fds_open)
return file_hash.hexdigest()
# elif self.get_object_type(previous_hash) == "delta\n":
#
# # treba zrekonstruovat subor, z neho si vypocitat signaturu a ulozit deltu k najnovsiemu
# return
else:
with open(source_path, "rb") as SF:
with open(target_file, "wb") as TF: #bol gzip
while True:
block = SF.read(block_size)
file_hash.update(block)
TF.write(block)
if not block:
self.file_rename(target_file, file_hash.hexdigest() + ".data")
with open(target_file_header, "wb") as THF:
THF.write("gz\n")
THF.write("signature\n")
sigProcess = subprocess.Popen(['rdiff', 'signature', source_path], stdout=subprocess.PIPE)
signature, signatureErr = sigProcess.communicate()
if (signatureErr is None):
THF.write(str(len(signature)))
THF.write("\n")
THF.write(signature)
else:
THF.write(str(0))
self.file_rename(target_file_header, file_hash.hexdigest() + ".meta")
THF.close()
break
TF.close()
self.write_to_journal("move " + self.get_journal_object_path(file_hash.hexdigest()) + " " + os.path.join(self.store_path, "objects", file_hash.hexdigest() + ".data"))
self.write_to_journal("move " + self.get_journal_object_header_path(file_hash.hexdigest()) + " " + os.path.join(self.store_path, "objects", file_hash.hexdigest() + ".meta"))
SF.close()
if debug_fds: check_fds(fds_open)
return file_hash.hexdigest()
