mirror of https://github.com/MISP/PyMISP
56 lines
2.2 KiB
Python
56 lines
2.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from pathlib import Path
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import csv
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from pymisp import MISPObject
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class CSVLoader():
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def __init__(self, template_name: str, csv_path: Path, fieldnames: list=[], has_fieldnames=False,
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delimiter: str=',', quotechar: str='"'):
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self.template_name = template_name
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self.delimiter = delimiter
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self.quotechar = quotechar
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self.csv_path = csv_path
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self.fieldnames = [f.strip().lower() for f in fieldnames]
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if not self.fieldnames:
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# If the user doesn't pass fieldnames, we assume the CSV has them.
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self.has_fieldnames = True
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else:
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self.has_fieldnames = has_fieldnames
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def load(self):
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objects = []
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with open(self.csv_path, newline='') as csvfile:
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reader = csv.reader(csvfile, delimiter=self.delimiter, quotechar=self.quotechar)
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if self.has_fieldnames:
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# The file has fieldnames, we either ignore it, or validate its validity
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fieldnames = [f.strip().lower() for f in reader.__next__()]
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if not self.fieldnames:
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self.fieldnames = fieldnames
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if not self.fieldnames:
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raise Exception(f'No fieldnames, impossible to create objects.')
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else:
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# Check if the CSV file has a header, and if it matches with the object template
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tmp_object = MISPObject(self.template_name)
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allowed_fieldnames = list(tmp_object._definition['attributes'].keys())
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for fieldname in self.fieldnames:
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if fieldname not in allowed_fieldnames:
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raise Exception(f'{fieldname} is not a valid object relation for {self.template_name}: {allowed_fieldnames}')
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for row in reader:
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tmp_object = MISPObject(self.template_name)
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has_attribute = False
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for object_relation, value in zip(self.fieldnames, row):
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if value:
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has_attribute = True
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tmp_object.add_attribute(object_relation, value=value)
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if has_attribute:
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objects.append(tmp_object)
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return objects
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