sampling-fingers-crossed

HTTP server example: sampling + fingers-crossed logging

This example demonstrates how to enable gosoline's context-based sampling and fingers-crossed logging in an HTTP service.

Run

go run .

Server listens on http://127.0.0.1:8088.

Endpoints

• GET /success: returns HTTP 200
• GET /fail: returns HTTP 500 (useful to see fingers-crossed flushing)

Try it

1) Normal request

curl -i http://127.0.0.1:8088/success

2) Force sampling via request header

curl -i -H 'X-Goso-Sampled: true' http://127.0.0.1:8088/success
curl -i -H 'X-Goso-Sampled: false' http://127.0.0.1:8088/success

3) Trigger a failure (flushes buffered logs)

curl -i -H 'X-Goso-Sampled: false' http://127.0.0.1:8088/fail

On a non-sampled request, gosoline buffers most log lines and flushes them on errors and failed requests.