NodeJS - 如何从eventListener

Question

我对NodeJS和网络开发都很陌生。 我使用快速Web服务器，而requestter.on是ZMQ listener。

如何访问相应app.post（）方法的相应res对象？我通过将requester.on-listener移动到任何app.post方法来尝试它，但它会导致不良的副作用。

app.post("/first", function (req, res) {
    var reqStringFirst
    requester.send(reqString);
    //the app gets a response immediately after the send() call
});

app.post("/second", function (req, res) {
    var reqStringSecond
    requester.send(reqString);
    //the app gets a response immediately after the send() call
});

requester.on("message", function (reply) {
    var replyJSON = new TextDecoder("utf-8").decode(reply);

    // and here I want to use the respective res 
    // object to render different pages depending on the replyJSON content. 

    //like this line:
    res.render("pages/serviceDetails", {replyJSON});
});

最亲切的问候