Double header writes are being performed

[whoisjeremylam]

CheckAndParseJsonCTX is responsible for writing any errors back to the client. Therefore this block of code writes a second error:

    m, err := CheckAndParseJsonCTX(c, w, r)
    if err != nil {
        w.WriteHeader(http.StatusBadRequest)
        returnCode := enulib.ReturnCode{RequestId: c.Value(consts.RequestIdKey).(string), Code: -3, Description: err.Error()}
        if err := json.NewEncoder(w).Encode(returnCode); err != nil {
            panic(err)
        }
        //      ReturnServerError(c, w, err)
        return nil
    }

It should be replaced by:

    m, err := CheckAndParseJsonCTX(c, w, r)
    if err != nil {
        // Status errors are handled inside CheckAndParseJsonCTX, so we just exit gracefully
        return nil
    }