88 lines
3.1 KiB
Python
Executable File
88 lines
3.1 KiB
Python
Executable File
'''
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Onionr - Private P2P Communication
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This file handles block storage, providing an abstraction for storing blocks between file system and database
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'''
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'''
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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'''
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import sys, sqlite3, os
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from onionrutils import bytesconverter, stringvalidators
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from coredb import dbfiles
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import filepaths, onionrcrypto, dbcreator, onionrexceptions
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from onionrcrypto import hashers
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DB_ENTRY_SIZE_LIMIT = 10000 # Will be a config option
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def _dbInsert(blockHash, data):
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conn = sqlite3.connect(dbfiles.block_data_db, timeout=10)
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c = conn.cursor()
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data = (blockHash, data)
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c.execute('INSERT INTO blockData (hash, data) VALUES(?, ?);', data)
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conn.commit()
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conn.close()
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def _dbFetch(blockHash):
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conn = sqlite3.connect(dbfiles.block_data_db, timeout=10)
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c = conn.cursor()
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for i in c.execute('SELECT data from blockData where hash = ?', (blockHash,)):
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return i[0]
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conn.commit()
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conn.close()
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return None
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def deleteBlock(blockHash):
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# You should call core.removeBlock if you automatically want to remove storage byte count
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if os.path.exists('%s/%s.dat' % (filepaths.block_data_location, blockHash)):
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os.remove('%s/%s.dat' % (filepaths.block_data_location, blockHash))
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return True
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conn = sqlite3.connect(dbfiles.block_data_db, timeout=10)
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c = conn.cursor()
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data = (blockHash,)
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c.execute('DELETE FROM blockData where hash = ?', data)
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conn.commit()
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conn.close()
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return True
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def store(data, blockHash=''):
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assert stringvalidators.validate_hash(blockHash)
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ourHash = hashers.sha3_hash(data)
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if blockHash != '':
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assert ourHash == blockHash
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else:
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blockHash = ourHash
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if DB_ENTRY_SIZE_LIMIT >= sys.getsizeof(data):
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_dbInsert(blockHash, data)
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else:
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with open('%s/%s.dat' % (filepaths.block_data_location, blockHash), 'wb') as blockFile:
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blockFile.write(data)
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def getData(bHash):
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assert stringvalidators.validate_hash(bHash)
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bHash = bytesconverter.bytes_to_str(bHash)
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# First check DB for data entry by hash
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# if no entry, check disk
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# If no entry in either, raise an exception
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retData = None
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fileLocation = '%s/%s.dat' % (filepaths.block_data_location, bHash)
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if os.path.exists(fileLocation):
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with open(fileLocation, 'rb') as block:
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retData = block.read()
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else:
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retData = _dbFetch(bHash)
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if retData is None:
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raise onionrexceptions.NoDataAvailable("Block data for %s is not available" % [bHash])
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return retData |