45 lines
996 B
Go
45 lines
996 B
Go
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package errcode
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import (
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"encoding/json"
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"net/http"
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)
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// ServeJSON attempts to serve the errcode in a JSON envelope. It marshals err
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// and sets the content-type header to 'application/json'. It will handle
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// ErrorCoder and Errors, and if necessary will create an envelope.
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func ServeJSON(w http.ResponseWriter, err error) error {
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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var sc int
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switch errs := err.(type) {
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case Errors:
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if len(errs) < 1 {
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break
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}
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if err, ok := errs[0].(ErrorCoder); ok {
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sc = err.ErrorCode().Descriptor().HTTPStatusCode
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}
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case ErrorCoder:
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sc = errs.ErrorCode().Descriptor().HTTPStatusCode
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err = Errors{err} // create an envelope.
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default:
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// We just have an unhandled error type, so just place in an envelope
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// and move along.
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err = Errors{err}
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}
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if sc == 0 {
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sc = http.StatusInternalServerError
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}
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w.WriteHeader(sc)
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if err := json.NewEncoder(w).Encode(err); err != nil {
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return err
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}
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return nil
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}
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