ail-framework/bin/Global.py

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#!/usr/bin/env python3
# -*-coding:UTF-8 -*
"""
The ZMQ_Feed_Q Module
=====================
This module is consuming the Redis-list created by the ZMQ_Feed_Q Module,
And save the paste on disk to allow others modules to work on them.
..todo:: Be able to choose to delete or not the saved paste after processing.
..todo:: Store the empty paste (unprocessed) somewhere in Redis.
..note:: Module ZMQ_Something_Q and ZMQ_Something are closely bound, always put
the same Subscriber name in both of them.
Requirements
------------
*Need running Redis instances.
*Need the ZMQ_Feed_Q Module running to be able to work properly.
"""
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##################################
# Import External packages
##################################
import base64
import hashlib
import io
import gzip
import os
import sys
import time
import uuid
import datetime
import redis
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from pubsublogger import publisher
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##################################
# Import Project packages
##################################
from module.abstract_module import AbstractModule
sys.path.append(os.path.join(os.environ['AIL_BIN'], 'lib/'))
import ConfigLoader
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from Helper import Process
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class Global(AbstractModule):
"""
Global module for AIL framework
"""
def __init__(self):
super(Global, self).__init__()
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self.r_stats = ConfigLoader.ConfigLoader().get_redis_conn("ARDB_Statistics")
self.processed_paste = 0
# TODO rename time_1 explicitely
self.time_1 = time.time()
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# Get and sanityze PASTE DIRECTORY
self.PASTES_FOLDER = os.path.join(os.environ['AIL_HOME'], self.process.config.get("Directories", "pastes"))
self.PASTES_FOLDERS = self.PASTES_FOLDER + '/'
self.PASTES_FOLDERS = os.path.join(os.path.realpath(self.PASTES_FOLDERS), '')
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# Waiting time in secondes between to message proccessed
self.pending_seconds = 0.5
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# Send module state to logs
self.redis_logger.info(f"Module {self.module_name} initialized")
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def computeNone(self):
difftime = time.time() - self.time_1
if int(difftime) > 30:
to_print = f'Global; ; ; ;glob Processed {self.processed_paste} paste(s) in {difftime} s'
self.redis_logger.debug(to_print)
self.time_1 = time.time()
self.processed_paste = 0
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def compute(self, message):
# Recovering the streamed message informations
splitted = message.split()
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if len(splitted) == 2:
paste, gzip64encoded = splitted
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# Remove PASTES_FOLDER from item path (crawled item + submited)
if self.PASTES_FOLDERS in paste:
paste = paste.replace(self.PASTES_FOLDERS, '', 1)
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file_name_paste = paste.split('/')[-1]
if len(file_name_paste) > 255:
new_file_name_paste = '{}{}.gz'.format(file_name_paste[:215], str(uuid.uuid4()))
paste = self.rreplace(paste, file_name_paste, new_file_name_paste, 1)
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# Creating the full filepath
filename = os.path.join(self.PASTES_FOLDER, paste)
filename = os.path.realpath(filename)
# Incorrect filename
if not os.path.commonprefix([filename, self.PASTES_FOLDER]) == self.PASTES_FOLDER:
self.redis_logger.warning(f'Global; Path traversal detected {filename}')
else:
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# Decode compressed base64
decoded = base64.standard_b64decode(gzip64encoded)
new_file_content = self.gunzip_bytes_obj(decoded)
if new_file_content:
filename = self.check_filename(filename, new_file_content)
if filename:
# create subdir
dirname = os.path.dirname(filename)
if not os.path.exists(dirname):
os.makedirs(dirname)
with open(filename, 'wb') as f:
f.write(decoded)
paste = filename
# remove self.PASTES_FOLDER from
if self.PASTES_FOLDERS in paste:
paste = paste.replace(self.PASTES_FOLDERS, '', 1)
self.process.populate_set_out(paste)
self.processed_paste+=1
else:
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# TODO Store the name of the empty paste inside a Redis-list
self.redis_logger.debug(f"Empty Paste: {message} not processed")
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def check_filename(self, filename, new_file_content):
"""
Check if file is not a duplicated file
return the filename if new file, else None
"""
# check if file exist
if os.path.isfile(filename):
self.redis_logger.warning(f'File already exist {filename}')
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# Check that file already exists but content differs
curr_file_content = self.gunzip_file(filename)
if curr_file_content:
# Compare file content with message content with MD5 checksums
curr_file_md5 = hashlib.md5(curr_file_content).hexdigest()
new_file_md5 = hashlib.md5(new_file_content).hexdigest()
if new_file_md5 != curr_file_md5:
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# MD5 are not equals, verify filename
if filename.endswith('.gz'):
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filename = f'{filename[:-3]}_{new_file_md5}.gz'
else:
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filename = f'{filename}_{new_file_md5}'
self.redis_logger.debug(f'new file to check: {filename}')
if os.path.isfile(filename):
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# Ignore duplicate
self.redis_logger.debug(f'ignore duplicated file {filename}')
filename = None
else:
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# Ignore duplicate checksum equals
self.redis_logger.debug(f'ignore duplicated file {filename}')
filename = None
else:
# File not unzipped
filename = None
return filename
def gunzip_file(self, filename):
"""
Unzip a file
publish stats if failure
"""
curr_file_content = None
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try:
with gzip.open(filename, 'rb') as f:
curr_file_content = f.read()
except EOFError:
self.redis_logger.warning(f'Global; Incomplete file: {filename}')
# save daily stats
self.r_stats.zincrby('module:Global:incomplete_file', datetime.datetime.now().strftime('%Y%m%d'), 1)
except OSError:
self.redis_logger.warning(f'Global; Not a gzipped file: {filename}')
# save daily stats
self.r_stats.zincrby('module:Global:invalid_file', datetime.datetime.now().strftime('%Y%m%d'), 1)
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return curr_file_content
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def gunzip_bytes_obj(self, bytes_obj):
gunzipped_bytes_obj = None
try:
in_ = io.BytesIO()
in_.write(bytes_obj)
in_.seek(0)
with gzip.GzipFile(fileobj=in_, mode='rb') as fo:
gunzipped_bytes_obj = fo.read()
except Exception as e:
self.redis_logger.warning(f'Global; Invalid Gzip file: {filename}, {e}')
return gunzipped_bytes_obj
def rreplace(self, s, old, new, occurrence):
li = s.rsplit(old, occurrence)
return new.join(li)
if __name__ == '__main__':
module = Global()
module.run()