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auth.go
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auth.go
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package api
import (
"fmt"
"net/http"
)
type canceler interface {
CancelRequest(*http.Request)
}
// Transport manages injection of the API token
type AuthenticatedTransport struct {
// The Token used for authentication. This can either the be
// organizations registration token, or the agents access token.
Token string
// Transport is the underlying HTTP transport to use when making
// requests. It will default to http.DefaultTransport if nil.
Transport http.RoundTripper
}
// RoundTrip invoked each time a request is made
func (t AuthenticatedTransport) RoundTrip(req *http.Request) (*http.Response, error) {
if t.Token == "" {
return nil, fmt.Errorf("Invalid token, empty string supplied")
}
req.Header.Set("Authorization", fmt.Sprintf("Token %s", t.Token))
return t.transport().RoundTrip(req)
}
// Client builds a new http client.
func (t *AuthenticatedTransport) Client() *http.Client {
return &http.Client{Transport: t}
}
// CancelRequest cancels an in-flight request by closing its connection.
func (t *AuthenticatedTransport) CancelRequest(req *http.Request) {
cancelableTransport := t.Transport.(canceler)
cancelableTransport.CancelRequest(req)
}
func (t *AuthenticatedTransport) transport() http.RoundTripper {
// Use the custom transport if one was provided
if t.Transport != nil {
return t.Transport
}
return http.DefaultTransport
}