The Problem

HAR files contain everything your browser sends and receives—passwords, API keys, tokens, emails, IP addresses. Support teams need them for debugging, but sharing them raw is a security nightmare. Manually editing is error-prone: miss one token in a 10MB file and you have a breach. Even automated tools can't catch everything—domain-specific secrets require domain-specific patterns.

The Solution

har-capture helps identify and remove common sensitive data patterns from HAR files while preserving their debugging value. Interactive review mode shows you what was flagged so you can verify before sharing. Extensible API lets you add custom patterns for your domain.

⚠️ Important: Use at Your Own Risk

har-capture is a development tool that helps identify common PII patterns. It is NOT a substitute for manual security review, domain-specific sanitization, or production security workflows.

This tool uses heuristics that cannot anticipate every pattern. Domain-specific secrets, proprietary formats, and unusual auth schemes may not be detected. You are responsible for verifying all sanitized output before sharing.

Always use interactive mode (--interactive) to review what was flagged. For production use, extend the detection patterns for your specific domain. Assume HAR files may still contain sensitive data after sanitization.

This tool reduces but does not eliminate the risk of PII exposure. Provided "as-is" under MIT License without warranty of any kind.

Se det i aktion

Basic Usage Comparison Interactive Review

Capture and automatically sanitize HAR files with a single command:

$ har-capture get http://localhost:8080/api/user -o demo.har

============================================================
HAR CAPTURE
============================================================

  Target:     http://localhost:8080/api/user
  Browser:    chromium
  Output:     demo.har

Checking connectivity...
  Connected:  http://localhost:8080/

Checking authentication type...
  Detected: Form-based or no auth required

============================================================
CAPTURE COMPLETE
============================================================

  Compressed: demo.sanitized.har.gz
  Sanitized:  demo.sanitized.har
  Removed 3 bloat entries (7 -> 4)

Next steps:
  • Share the file (PII removed): demo.sanitized.har.gz
  • Validate for secrets: har-capture validate demo.sanitized.har.gz

Validation

Verify HAR files are safe to share:

$ har-capture validate demo.sanitized.har.gz

[OK] demo.sanitized.har.gz: Clean

Summary: 0 errors, 0 warnings

See how sensitive data is automatically detected and removed:

Original (Unlabeled Pipe Data)

var deviceConfig = '
  NETGEAR-C7000|
  192.168.0.1|
  admin|
  TK421_1977!|
  MatrixNet-5G|
  sk_live_a8f2k9m3p7x1n6v4b2|
  SN827194729|
  WPA3|
  10.31.41.5
';
var systemInfo = '
  Router7|
  GRID_NET_2024|
  00:1A:2B:3C:4D:5E|
  enabled|
  tok_1982flynn
';

Sanitized (PII Removed)

var deviceConfig = '
  NETGEAR-C7000|
  10.255.186.84|
  admin|
  FIELD_a8b9c0d1|
  MatrixNet-5G|
  FIELD_7b609581|
  SN: SERIAL_c1673a31|
  WPA3|
  10.255.186.84
';
var systemInfo = '
  Router7|
  GRID_NET_2024|
  02:21:96:a3:9b:4b|
  enabled|
  FIELD_9d8e7f6g
';

When ambiguous values are detected (like unlabeled pipe-delimited data), har-capture prompts for manual review:

Interactive review mode showing flagged values for manual selection

Why It Matters

Security teams can share HAR files with vendors without exposing credentials.

Support teams can collect diagnostics from users safely and confidently.

Developers can automate HAR sanitization in CI/CD pipelines without dependencies.

One leaked API key can cost thousands in breach response. har-capture prevents that.

Nyckelfunktioner

Upptäckt av vanliga PII (lösenord, tokens, e-post, IP, MAC)
Formatbevarande redigering (behåller giltig testdata)
Korrelationsbevarande hashar
Noll beroenden (endast stdlib)
CLI och Python API
Interaktivt granskningsläge för verifiering

Användningsfall

Supportteam som samlar diagnostik från användare
Säkerhetsteam som granskar webbtrafik
Testautomation med känslig data
Buggrapporter som kräver HAR-filer

Varför har-capture?

Funktion	har-capture	Google har-sanitizer	Manuell redigering
Programmerbar (API/CLI)	✅	❌	❌
Formatbevarande redigering	✅	❌	❌
Aktivt underhållen	✅	❌ (Senast uppdaterad 2017)	—
Noll beroenden	✅	❌ (Python 2.7, Flask, etc.)	—

Dokumentation

Fullständig dokumentation tillgänglig på GitHub

Läs mer om HAR-specifikationen

Installation

Installera

pip install har-capture

Användning

CLI Python API

# Fånga och sanera med interaktiv granskning
har-capture get https://example.com --interactive -o sanitized.har.gz

# Eller sanera befintlig fil
har-capture sanitize input.har -o clean.har

# Interaktivt granskningsläge
har-capture sanitize input.har --interactive

from har_capture import sanitize_har
import json

# Sanera HAR-data
with open('input.har') as f:
    har_data = json.load(f)

clean_har = sanitize_har(har_data)

with open('clean.har', 'w') as f:
    json.dump(clean_har, f)

Redo att dela HAR-filer säkert?

Visa på GitHub Installera från PyPI