58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
import hashlib
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import json
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import os
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from elodie import constants
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class Db(object):
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def __init__(self):
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# verify that the application directory (~/.elodie) exists, else create it
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if not os.path.exists(constants.application_directory):
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os.makedirs(constants.application_directory)
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# If the hash db doesn't exist we create it.
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# Otherwise we only open for reading
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if not os.path.isfile(constants.hash_db):
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with open(constants.hash_db, 'a'):
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os.utime(constants.hash_db, None)
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self.hash_db = {}
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# We know from above that this file exists so we open it for reading only.
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with open(constants.hash_db, 'r') as f:
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try:
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self.hash_db = json.load(f)
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except ValueError:
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pass
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def add_hash(self, key, value, write=False):
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self.hash_db[key] = value
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if(write == True):
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self.update_hash_db()
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def check_hash(self, key):
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return key in self.hash_db
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def get_hash(self, key):
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if(self.check_hash(key) == True):
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return self.hash_db[key]
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return None
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def update_hash_db(self):
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with open(constants.hash_db, 'w') as f:
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json.dump(self.hash_db, f)
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"""
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http://stackoverflow.com/a/3431835/1318758
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"""
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def checksum(self, file_path, blocksize=65536):
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hasher = hashlib.sha256()
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with open(file_path, 'r') as f:
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buf = f.read(blocksize)
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while len(buf) > 0:
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hasher.update(buf)
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buf = f.read(blocksize)
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return hasher.hexdigest()
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return None
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