def __init__(self, file_name, mode='r'):
# random_number for temporary file name
random_number = random.randint(1152921504606846976,
18446744073709551615)
# temporary file
self.temp_file_path = os.path.join(persepolis_tmp, str(random_number))
# r = read mode , w = write mode , a = append mode
self.mode = mode
self.file_name = file_name
# Creating a lock file
# lock file prevents accessing a file simoltaneously
# If mode is 'w' or 'a' (write or append) , all changes is saving in a temporary file and after closing, original file replaced by temporary file
# If mode is 'r' (Read) , original file is copying in temp_file_path and
# then content of temporary file is reading.
self.lock_file = self.file_name + ".lock"
while os.path.isfile(self.lock_file) == True:
sleep(0.1)
osCommands.touch(self.lock_file)
if self.mode == "w":
self.f = open(self.temp_file_path, "w")
elif self.mode == "a":
shutil.copy(str(self.file_name), str(self.temp_file_path))
self.f = open(self.temp_file_path, "a")
else:
shutil.copy(str(self.file_name), str(self.temp_file_path))
self.f = open(self.temp_file_path, "r")
persepolis_shutdown = os.path.join(persepolis_tmp, 'shutdown')
# shutil.rmtree(persepolis_shutdown, ignore_errors=True, onerror=None)
# creating folders
for folder in [
config_folder, download_info_folder, persepolis_tmp, category_folder,
queue_info_folder, persepolis_shutdown
]:
osCommands.makeDirs(folder)
# creating files
for file in [
queues_list, download_list_file, download_list_file_active,
single_downloads_list_file
]:
osCommands.touch(file)
# lock files perventing to access a file simultaneously
# removing lock files in starting persepolis
pattern_folder_list = [
config_folder, download_info_folder, category_folder, queue_info_folder
]
for folder in pattern_folder_list:
pattern = os.path.join(str(folder), '*.lock')
for file in glob.glob(pattern):
osCommands.remove(file)
# refresh logs!
log_file = os.path.join(str(config_folder), 'persepolisdm.log')