Slack chat.postMessage with attachments

SlackPostMessageWithAttachments.js

var http = require("https");
var querystring = require('querystring');

//2 attachments as JavaScript Objects
var attachments = [{
    fallback: "Attachment 1 Fallback",
    title: "This is Attachment 1",
    text: "Attachment 1 Text",
    color: "#3964db"
}, {
    fallback: "Attachment 2 Fallback",
    title: "This is Attachment 2",
    text: "Attachment 2 Text",
    color: "#3964db"
}];

//add the attachments to the message by stringify-ing them
//posting without stringify-ing the attachments will lead to an error from the Slack API
var message = {
    token: "your-token",
    channel: "@daniel",
    as_user: false,
    username: "daniel",
    attachments: JSON.stringify(attachments),
    text: "This is a message with attachments"
}

var qs = querystring.stringify(message);

var options = {
    "method": "GET",
    "hostname": "slack.com",
    "path": "/api/chat.postMessage?" + qs
};

var req = http.request(options, function (res) {
    var chunks = [];

    res.on("data", function (chunk) {
        chunks.push(chunk);
    });

    res.on("end", function () {
        var body = Buffer.concat(chunks);
        console.log(body.toString());
    });
});

First result in Google about the Slack invalid_array_arg error. Thanks a lot 😊

method should be POST now
https://api.slack.com/methods/chat.postMessage

This is still true even though the endpoint is POST now, so so bad

https://api.slack.com/methods/chat.postMessage#arg_attachments

A JSON-based array of structured attachments, presented as a URL-encoded string

So it's not JSON, it's JSON-based