Hi
I want to implement a client middleware - for example: sign the request
body and add the signature as an HTTP header.
I thought that the best way to do it is to implement a RoundTripper
interface <https://golang.org/pkg/net/http/#RoundTripper> which up on
request, calculate the signature, adds the header, and invoke a "next"
ToundTripper.
This could be a very generic implementation, which i can inject to any
client that uses the standard library http.Client.
However, I found the following in the doc:
// RoundTrip should not modify the request, except for
// consuming and closing the Request's Body. RoundTrip may
// read fields of the request in a separate goroutine. Callers
// should not mutate the request until the Response's Body has
// been closed.
Is there a standard way to do it?
Thanks,
Eyal
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