Module: Philiprehberger::LogFilter::Presets

Defined in:
lib/philiprehberger/log_filter/presets.rb

Overview

Factory methods that return pre-configured Filter instances for common log-noise scenarios.

Class Method Summary collapse

Class Method Details

.assets ⇒ Filter

Filter that drops static-asset request log lines.

Returns:

  • (Filter) —

    a filter suppressing asset paths



18
19
20
 
# File 'lib/philiprehberger/log_filter/presets.rb', line 18

def self.assets
  Filter.new.drop(/\.(css|js|png|jpg|jpeg|gif|svg|ico|woff|woff2|ttf|eot|map)\b/i)
end

.bots ⇒ Filter

Filter that drops bot/crawler request log lines.

Returns:

  • (Filter) —

    a filter suppressing bot user-agents



25
26
27
 
# File 'lib/philiprehberger/log_filter/presets.rb', line 25

def self.bots
  Filter.new.drop(/bot|crawler|spider|slurp|googlebot|bingbot/i)
end

.health_check ⇒ Filter

Filter that drops health-check request log lines.

Returns:

  • (Filter) —

    a filter suppressing health-check paths



11
12
13
 
# File 'lib/philiprehberger/log_filter/presets.rb', line 11

def self.health_check
  Filter.new.drop(%r{health_?check|/health|/ping|/ready|/alive}i)
end

.pii ⇒ Filter

Filter that redacts common PII patterns from log lines.

Replaces email addresses, US Social Security Numbers, and 13–19 digit credit-card-shaped numbers with ‘[REDACTED]`.

Returns:

  • (Filter) —

    a filter replacing PII with ‘[REDACTED]`



35
36
37
38
39
40
 
# File 'lib/philiprehberger/log_filter/presets.rb', line 35

def self.pii
  Filter.new
        .replace(/[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}/i, '[REDACTED]')
        .replace(/\b\d{3}-\d{2}-\d{4}\b/, '[REDACTED]')
        .replace(/\b\d(?:[ -]?\d){12,18}\b/, '[REDACTED]')
end

.secrets ⇒ Filter

Filter that redacts common secret patterns from log lines.

Replaces Bearer tokens, ‘api_key=…`/`api-key=…` values, and AWS-style access key IDs with `[REDACTED]`.

Returns:

  • (Filter) —

    a filter replacing secrets with ‘[REDACTED]`



48
49
50
51
52
53
 
# File 'lib/philiprehberger/log_filter/presets.rb', line 48

def self.secrets
  Filter.new
        .replace(/Bearer\s+[A-Za-z0-9._-]+/, 'Bearer [REDACTED]')
        .replace(/\b(api[_-]?key|access[_-]?token)=([A-Za-z0-9._-]+)/i, '\1=[REDACTED]')
        .replace(/\bAKIA[0-9A-Z]{16}\b/, '[REDACTED]')
end