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package cueversion
import (
"maps"
"net/http"
)
// NewTransport returns an [http.RoundTripper] implementation
// that wraps next and adds a "User-Agent" header to every
// HTTP request containing the result of UserAgent(clientType).
// If next is nil, [http.DefaultTransport] will be used.
func NewTransport(clientType string, next http.RoundTripper) http.RoundTripper {
if next == nil {
next = http.DefaultTransport
}
return &userAgentTransport{
next: next,
userAgent: UserAgent(clientType),
}
}
type userAgentTransport struct {
next http.RoundTripper
userAgent string
}
func (t *userAgentTransport) RoundTrip(req *http.Request) (*http.Response, error) {
// RoundTrip isn't allowed to modify the request, but we
// can avoid doing a full clone.
req1 := *req
req1.Header = maps.Clone(req.Header)
req1.Header.Set("User-Agent", t.userAgent)
return t.next.RoundTrip(&req1)
}
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