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// Package apierr represents API error types.
package apierr
import "fmt"
// A BaseError wraps the code and message which defines an error. It also
// can be used to wrap an original error object.
//
// Should be used as the root for errors satisfying the awserr.Error. Also
// for any error which does not fit into a specific error wrapper type.
type BaseError struct {
// Classification of error
code string
// Detailed information about error
message string
// Optional original error this error is based off of. Allows building
// chained errors.
origErr error
}
// New returns an error object for the code, message, and err.
//
// code is a short no whitespace phrase depicting the classification of
// the error that is being created.
//
// message is the free flow string containing detailed information about the error.
//
// origErr is the error object which will be nested under the new error to be returned.
func New(code, message string, origErr error) *BaseError {
return &BaseError{
code: code,
message: message,
origErr: origErr,
}
}
// Error returns the string representation of the error.
//
// See ErrorWithExtra for formatting.
//
// Satisfies the error interface.
func (b *BaseError) Error() string {
return b.ErrorWithExtra("")
}
// String returns the string representation of the error.
// Alias for Error to satisfy the stringer interface.
func (b *BaseError) String() string {
return b.Error()
}
// Code returns the short phrase depicting the classification of the error.
func (b *BaseError) Code() string {
return b.code
}
// Message returns the error details message.
func (b *BaseError) Message() string {
return b.message
}
// OrigErr returns the original error if one was set. Nil is returned if no error
// was set.
func (b *BaseError) OrigErr() error {
return b.origErr
}
// ErrorWithExtra is a helper method to add an extra string to the stratified
// error message. The extra message will be added on the next line below the
// error message like the following:
//
// <error code>: <error message>
// <extra message>
//
// If there is a original error the error will be included on a new line.
//
// <error code>: <error message>
// <extra message>
// caused by: <original error>
func (b *BaseError) ErrorWithExtra(extra string) string {
msg := fmt.Sprintf("%s: %s", b.code, b.message)
if extra != "" {
msg = fmt.Sprintf("%s\n\t%s", msg, extra)
}
if b.origErr != nil {
msg = fmt.Sprintf("%s\ncaused by: %s", msg, b.origErr.Error())
}
return msg
}
// A RequestError wraps a request or service error.
//
// Composed of BaseError for code, message, and original error.
type RequestError struct {
*BaseError
statusCode int
requestID string
}
// NewRequestError returns a wrapped error with additional information for request
// status code, and service requestID.
//
// Should be used to wrap all request which involve service requests. Even if
// the request failed without a service response, but had an HTTP status code
// that may be meaningful.
//
// Also wraps original errors via the BaseError.
func NewRequestError(base *BaseError, statusCode int, requestID string) *RequestError {
return &RequestError{
BaseError: base,
statusCode: statusCode,
requestID: requestID,
}
}
// Error returns the string representation of the error.
// Satisfies the error interface.
func (r *RequestError) Error() string {
return r.ErrorWithExtra(fmt.Sprintf("status code: %d, request id: [%s]",
r.statusCode, r.requestID))
}
// String returns the string representation of the error.
// Alias for Error to satisfy the stringer interface.
func (r *RequestError) String() string {
return r.Error()
}
// StatusCode returns the wrapped status code for the error
func (r *RequestError) StatusCode() int {
return r.statusCode
}
// RequestID returns the wrapped requestID
func (r *RequestError) RequestID() string {
return r.requestID
}
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