Created
September 28, 2022 20:19
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Parses a .har file (a recording from the browser's developer console) and outputs the unique domains where a request is made and what that domain resolves to.
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| import argparse | |
| import json | |
| import subprocess | |
| from haralyzer import HarParser, HarPage | |
| def get_dns_response(domain): | |
| output = subprocess.check_output(["dig", "+short", domain], text=True) | |
| return [l.strip() for l in output.split("\n") if len(l.strip()) > 0] | |
| def analyze_har(harfile): | |
| print(harfile.name) | |
| print("=" * 77) | |
| unique_hosts = set() | |
| har = HarParser(json.loads(harfile.read())) | |
| for page in har.pages: | |
| print(f"URL: {page.url}") | |
| print(f"Hostname: {page.hostname}") | |
| for entry in page.entries: | |
| unique_hosts.add(entry.request.host) | |
| print() | |
| print("Unique request hosts") | |
| print("--------------------") | |
| for hostname in unique_hosts: | |
| print(f" - {hostname}") | |
| resolves_to = get_dns_response(hostname) | |
| print(" =>", ", ".join(resolves_to)) | |
| print("\n") | |
| if __name__ == "__main__": | |
| parser = argparse.ArgumentParser(description='Parse a .har file looking for unique request domains and CNAME cloaking.') | |
| parser.add_argument('harfiles', nargs='+', metavar="HARFILE", type=argparse.FileType('r')) | |
| args = parser.parse_args() | |
| for harfile in args.harfiles: | |
| analyze_har(harfile) |
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