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.

实际演示

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.

主要功能

检测常见 PII(密码、令牌、电子邮件、IP、MAC)
保留格式的编辑(保留有效的测试数据)
保留关联的哈希
零依赖(仅 stdlib)
CLI 和 Python API
用于验证的交互式审查模式

使用案例

支持团队从用户收集诊断信息
安全团队审查 Web 流量
使用敏感数据进行测试自动化
需要 HAR 文件的错误报告

为什么选择 har-capture?

功能	har-capture	Google har-sanitizer	手动编辑
可编程 (API/CLI)	✅	❌	❌
保留格式的编辑	✅	❌	❌
积极维护	✅	❌ (最后更新于 2017 年)	—
零依赖	✅	❌ (Python 2.7, Flask, etc.)	—

文档

完整文档可在以下位置获得 GitHub

了解有关 HAR 规范的更多信息

安装

pip install har-capture

使用

CLI Python API

# 使用交互式审查捕获和清理
har-capture get https://example.com --interactive -o sanitized.har.gz

# 或清理现有文件
har-capture sanitize input.har -o clean.har

# 交互式审查模式
har-capture sanitize input.har --interactive

from har_capture import sanitize_har
import json

# 清理 HAR 数据
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)

准备好安全分享 HAR 文件了吗?

在 GitHub 上查看从 PyPI 安装