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package protocol
import (
"net/http"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/request"
)
// UnmarshalErrorHandler provides unmarshaling errors API response errors for
// both typed and untyped errors.
type UnmarshalErrorHandler struct {
unmarshaler ErrorUnmarshaler
}
// ErrorUnmarshaler is an abstract interface for concrete implementations to
// unmarshal protocol specific response errors.
type ErrorUnmarshaler interface {
UnmarshalError(*http.Response, ResponseMetadata) (error, error)
}
// NewUnmarshalErrorHandler returns an UnmarshalErrorHandler
// initialized for the set of exception names to the error unmarshalers
func NewUnmarshalErrorHandler(unmarshaler ErrorUnmarshaler) *UnmarshalErrorHandler {
return &UnmarshalErrorHandler{
unmarshaler: unmarshaler,
}
}
// UnmarshalErrorHandlerName is the name of the named handler.
const UnmarshalErrorHandlerName = "awssdk.protocol.UnmarshalError"
// NamedHandler returns a NamedHandler for the unmarshaler using the set of
// errors the unmarshaler was initialized for.
func (u *UnmarshalErrorHandler) NamedHandler() request.NamedHandler {
return request.NamedHandler{
Name: UnmarshalErrorHandlerName,
Fn: u.UnmarshalError,
}
}
// UnmarshalError will attempt to unmarshal the API response's error message
// into either a generic SDK error type, or a typed error corresponding to the
// errors exception name.
func (u *UnmarshalErrorHandler) UnmarshalError(r *request.Request) {
defer r.HTTPResponse.Body.Close()
respMeta := ResponseMetadata{
StatusCode: r.HTTPResponse.StatusCode,
RequestID: r.RequestID,
}
v, err := u.unmarshaler.UnmarshalError(r.HTTPResponse, respMeta)
if err != nil {
r.Error = awserr.NewRequestFailure(
awserr.New(request.ErrCodeSerialization,
"failed to unmarshal response error", err),
respMeta.StatusCode,
respMeta.RequestID,
)
return
}
r.Error = v
}
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