Part 6 – Logging and Observability
Integrate structured, consistent logging (console/file); make outputs report-ready.
Learning Objectives
Define a minimal, consistent log taxonomy for PoC tooling.
Instrument routes and lifecycle transitions with meaningful, parseable logs.
Configure dual sinks (stdout + file) for both live feedback and artifact capture.
Goals
Integrate a lightweight logger with severity levels and consistent prefixes.
Optionally support dual sinks (stdout + file).
Capture timestamps and key metadata (route, remote IP, filename, size).
Key Terms
Severity: Log level indicating importance (info, success, warn, error, status).
Dual Sink: Logging to console and file simultaneously.
Correlation: Using counters/IDs to tie related events together.
What You’ll Build
Logging calls in each route and in lifecycle transitions.
A simple, uniform log format tailored to PoC reporting.
Sections
Log Taxonomy: info, success, warn, error, status.
Placement: Before/after critical actions; include counters and limits.
Artifacts: Where to write logs; filename pattern; rotation considerations.
Milestone: Logs show a clear timeline of actions for a single run.
Exercises
Run a full cycle (download or exfil) and capture a clean log excerpt for notes.
Add minimal correlation IDs if chaining multiple tools.
What’s Next
Assemble the parts into the final
FileTransferServerclass with ergonomic configuration.
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