/
errortransport.go
46 lines (37 loc) · 1.18 KB
/
errortransport.go
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package registry
import (
"fmt"
"io/ioutil"
"net/http"
)
type httpStatusError struct {
Response *http.Response
Body []byte // Copied from `Response.Body` to avoid problems with unclosed bodies later. Nobody calls `err.Response.Body.Close()`, ever.
}
func (err *httpStatusError) Error() string {
return fmt.Sprintf("http: non-successful response (status=%v body=%q)", err.Response.StatusCode, err.Body)
}
var _ error = &httpStatusError{}
// ErrorTransport defines the data structure for returning errors from the round tripper.
type ErrorTransport struct {
Transport http.RoundTripper
}
// RoundTrip defines the round tripper for the error transport.
func (t *ErrorTransport) RoundTrip(request *http.Request) (*http.Response, error) {
resp, err := t.Transport.RoundTrip(request)
if err != nil {
return resp, err
}
if resp.StatusCode >= 500 || resp.StatusCode == http.StatusUnauthorized {
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("http: failed to read response body (status=%v, err=%q)", resp.StatusCode, err)
}
return nil, &httpStatusError{
Response: resp,
Body: body,
}
}
return resp, err
}