filter_har.py

import sys
import json


def filter(har_file, contains):
    with open(har_file) as f:
        har = json.load(f)

    entries = har['log']['entries']
    filtered = [e for e in entries if contains in e['request']['url']]

    har['log']['entries'] = filtered
    return har


def main():
    har_file = sys.argv[1]
    contains = sys.argv[2]
    filtered_har = sys.argv[3]

    har = filter(har_file, contains)

    with open(filtered_har, 'w') as f:
        # json.dump(har, f, indent=4)
        json.dump(har, f)

if __name__ == '__main__':
    main()