curl_task.js

var request = require('request');

module.exports = function (ctx, req, res) {
  res.setHeader('Content-Type', 'application/json');
  res.end(JSON.stringify({text:':hourglass:'}));
  var url = ctx.body.text;
  var response_url = ctx.body.response_url;
  var options = {
    url: url,
    headers: {
      'User-Agent': 'webtask-slack'
    }
  }
  request(options, function (error, response, body) {
    if (!error && response.statusCode == 200) {
      console.log("response received");
    }
    else {
      console.log("error", error);
    }
    request.post({
        url: response_url,
        body: {text: body},
        json: true
    }, function (error, response, responseBody) {
          
    });
  })
}