stdlib

Stdlib- Example correlation id middleware usage

creates a standard lib http server, listening on port 8087, sets up the correlation id middleware and registers the handlers

Build the server

From the project root

go build cmd/examples/stdlib/stdlib.go

Run the server

./stdlib

Curl, containing NO correlation id in the request

Curl the server, with headers flag enabled, with no correlation id, one will be created and added to the response

curl -i localhost:8087

The server returns the correlation id header (in the example, named my-trace-header, but this is configurable) and value in the response headers (and, in this case, in the body)

HTTP/1.1 200 OK
X-Correlation-Id: 68a914cd-591c-4701-b208-98c2181d8a2e
Date: Wed, 19 Jul 2023 13:49:21 GMT
Content-Length: 41
Content-Type: text/plain; charset=utf-8

cid: 68a914cd-591c-4701-b208-98c2181d8a2e

Curl, with a correlation id in the request

Curl the server, adding in the correlation id header

curl -i localhost:8087/hello -H "x-correlation-id: hello-world-1"

The server will return the correlation id header and value in the response headers (and, in this case, in the body)

HTTP/1.1 200 OK
X-Correlation-Id: hello-world-1
Date: Wed, 19 Jul 2023 13:48:57 GMT
Content-Length: 18
Content-Type: text/plain; charset=utf-8

cid: hello-world-1