80 lines
3.0 KiB
Python
80 lines
3.0 KiB
Python
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import csv
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import io
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import sys
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from time import time
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from breach.utils import alpha_num_lookup, create_dir, create_dir_for_file, RingDictionary
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csv.field_size_limit(sys.maxsize)
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def split_file(breach_compilation_file,
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output_dir='out',
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restart_from=0):
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# It seems like this function is not 100% correct as we need to clean the dataset after this.
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# It's not a big deal but I don't understand why we have to do that.
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# Could probably be to a limitation to the large number of files we open at the same time x increase of buffer.
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create_dir(output_dir)
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alpha = alpha_num_lookup()
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files_handlers = RingDictionary()
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t1 = time()
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with open(breach_compilation_file, 'r', encoding='utf8', errors='ignore') as r:
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for i, line in enumerate(r):
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if i % 10_000_000 == 0:
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elapsed_time = time() - t1
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t1 = time()
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print(f'|- Processed {i:,} rows in {elapsed_time:.2f} seconds.')
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if i < restart_from:
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continue
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try: # faster than if: https://stackoverflow.com/questions/1835756/using-try-vs-if-in-python
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email, password = line.strip().split(':', 1)
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except ValueError:
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continue
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output_file = get_output_file(alpha, email)
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output_file = output_dir + '/' + output_file
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write_line_to_file(files_handlers, line, output_file)
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def write_line_to_file(files_handlers, line, output_file, buffer_scale=100):
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try: # faster than if: https://stackoverflow.com/questions/1835756/using-try-vs-if-in-python
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files_handlers[output_file].write(line)
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except KeyError:
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create_dir_for_file(output_file)
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files_handlers[output_file] = open(file=output_file,
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mode='a+',
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encoding='utf8',
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buffering=buffer_scale * io.DEFAULT_BUFFER_SIZE)
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files_handlers[output_file].write(line)
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def get_output_file(alpha_lookup, email):
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try: # most likely case.
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letter_0 = email[0].lower()
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letter_1 = email[1].lower()
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letter_2 = email[2].lower()
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except IndexError:
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email_len = len(email)
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if email_len == 0:
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letter_0 = ''
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letter_1 = ''
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letter_2 = ''
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elif email_len == 1:
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letter_0 = email[0].lower()
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letter_1 = ''
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letter_2 = ''
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elif email_len == 2:
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letter_0 = email[0].lower()
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letter_1 = email[1].lower()
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letter_2 = ''
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else:
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raise Exception('Error in program.')
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if letter_0 not in alpha_lookup:
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output_file = 'symbols'
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elif letter_1 not in alpha_lookup:
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output_file = letter_0 + '/symbols'
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elif letter_2 not in alpha_lookup:
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output_file = letter_0 + '/' + letter_1 + '/symbols'
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else:
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output_file = letter_0 + '/' + letter_1 + '/' + letter_2
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return output_file
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