41 lines
935 B
Go
41 lines
935 B
Go
package errcode
|
|
|
|
import (
|
|
"encoding/json"
|
|
"net/http"
|
|
)
|
|
|
|
// ServeJSON attempts to serve the errcode in a JSON envelope. It marshals err
|
|
// and sets the content-type header to 'application/json'. It will handle
|
|
// ErrorCoder and Errors, and if necessary will create an envelope.
|
|
func ServeJSON(w http.ResponseWriter, err error) error {
|
|
w.Header().Set("Content-Type", "application/json")
|
|
var sc int
|
|
|
|
switch errs := err.(type) {
|
|
case Errors:
|
|
if len(errs) < 1 {
|
|
break
|
|
}
|
|
|
|
if err, ok := errs[0].(ErrorCoder); ok {
|
|
sc = err.ErrorCode().Descriptor().HTTPStatusCode
|
|
}
|
|
case ErrorCoder:
|
|
sc = errs.ErrorCode().Descriptor().HTTPStatusCode
|
|
err = Errors{err} // create an envelope.
|
|
default:
|
|
// We just have an unhandled error type, so just place in an envelope
|
|
// and move along.
|
|
err = Errors{err}
|
|
}
|
|
|
|
if sc == 0 {
|
|
sc = http.StatusInternalServerError
|
|
}
|
|
|
|
w.WriteHeader(sc)
|
|
|
|
return json.NewEncoder(w).Encode(err)
|
|
}
|