node.js – 如何返回slack slash命令的立即响应和延迟响应？

我正在尝试使用 hook.io microservice制作一个松弛的斜线命令机器人.根据 docs我应该能够发送立即响应然后单独的POST.但我无法得到立即响应,后来的POST也都工作了.

这是我的测试代码.

module['exports'] = function testbot(hook) {

var request = require('request');
// The parameters passed in via the slash command POST request.
var params = hook.params;

data = {
    "response_type": "ephemeral",
    "text": "Immediate Response"
}
hook.res.setHeader('Content-Type', 'application/json');
console.log("returning immediate response")
hook.res.write(JSON.stringify(data), 'utf8', delay(params));
//calling end() here sends the immediate response but the POST never happens.
// but if end() is called below instead slack gives a timeout error but the POST succeeds.
//hook.res.end()

//test with 3.5 second delay
function delay(params) {
    setTimeout(function () {post_response(params)},3500);
}

function post_response(params) {

    console.log("posting delayed response")
    // Set up the options for the HTTP request.
    var options = {
        // Use the Webhook URL from the Slack Incoming Webhooks integration.
        uri: params.response_url,
        method: 'POST',
        // Slack expects a JSON payload with a "text" property.
        json: {"response_type":"in_channel", "text":"Delayed response","parse":"full"}
    };


    // Make the POST request to the Slack incoming webhook.
    request(options, function (error, response, body) {
        // Pass error back to client if request endpoint can't be reached.
        if (error) {
            console.log(error);
            hook.res.end(error.message);
        } else {
            console.log("post OK");
        }
        // calling end() here sends the POST but the immediate response is lost to a slack timeout error.
        hook.res.end()
    })
};
}

在注释中详细说明res.end()早期意味着立即响应被发送但POST永远不会发生,而延迟res.end()直到POST后意味着延迟响应被发送但它从松弛产生超时错误与此同时.

我是一个javascript新手,所以希望有一个我忽略的简单解决方案.

一旦你在hook.io中调用res.end(),脚本将立即中止并结束处理.它相当于调用process.exit.如果你未能结束请求,hook.io最终会点击它自己的 Time-out Limit.

hook.io应该能够在Slack要求的三秒内响应Slack.

这是一个可能有用的指南：Making a Custom Slack Slash Command with hook.io