There should be a way to forward the request_id header when initializing the client

[Soulou]

Currently if a project is using this module, we loose track of the request when it is used since no request_id can be forwarded.

[EtienneM]

At Scalingo we use go-handler to automatically set a request ID:

https://github.com/Scalingo/go-handlers/blob/639d40004569f616e04c5d2d506126d54d667e3f/request_id_middleware.go

We would like to update the Do method to take a context.Context in argument:

go-scalingo/http/api_request.go

Line 70 in 6714c0f

func (c *client) Do(req *APIRequest) (*http.Response, error) {

So that we can set the request ID in the requests to the API here (if there is a request ID in the context):

go-scalingo/http/api_request.go

Line 105 in 6714c0f

req.HTTPRequest.Header.Add("User-Agent", c.userAgent)

Fixing this issue will lead to a new major version.