@GetMapping(produces = "text/plain;charset=utf-8")
    public String auth(@PathVariable String appId,
                       @RequestParam(name = "signature", required = false) String signature,
                       @RequestParam(name = "timestamp", required = false) String timestamp,
                       @RequestParam(name = "nonce", required = false) String nonce,
                       @RequestParam(name = "echostr", required = false) String echostr) {
        log.info("微信公众号AppID=>" + appId);
        log.info("接收到来自微信服务器的认证消息：[{}, {}, {}, {}]", signature, timestamp, nonce, echostr);
        WxMpService wxMpService = wxMpManageService.getWxMpService(appId);
        if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
            throw new IllegalArgumentException("请求参数非法，请核实!");
        }
        if (!wxMpService.switchover(appId)) {
            throw new IllegalArgumentException(String.format("未找到对应appid=[%s]的配置，请核实！", appId));
        }
        if (wxMpService.checkSignature(timestamp, nonce, signature)) {
            return echostr;
        }
        return "非法请求";
    }