Slack WebAPI fails with not_authed

Question

I'm attempting to post interactive messages to slack as a Bot User (using chat.postMessage, etc).

Although I am passing in the Bot Access Token (as received from the initial OAuth) I keep getting an error response stating "not_authed".

I get the same when I attempt auth.test.

I'm doing something like the following with "request" in node.js:

app.get("/testAuth/test", function(req,res){
    console.log("in testAuth/test...sending test message to Slack");

    var bToken = process.env.TESTBOT_ACCESS_TOKEN;
    var slackMessageURL = "https://slack.com/api/auth.test";
    var postOptions = {
        uri: slackMessageURL,
        method: "POST",
        token: bToken
    };
    request(postOptions, (error, response, body) => {
        if(error){
            console.log("OOPPPPS....we hit an error in auth.test: " + error);
        } else {
            console.log("auth.test response: " + JSON.stringify(response));
        }
    });
    res.send("Sent Test...check logs"); 
});

which results with:

auth.test response: {"statusCode":200,"body":"{\"ok\":false,\"error\":\"not_authed\"}",...

According to the Slack WebAPI docs, if I'm posting as the Bot, I should use the Bot's access token (as received from the initial oauth), but figure I'm either formatting my request incorrectly, or the token is not what Slack is expecting.

Testing with Postman, it seems I'm able to successfully auth when the token is passed x-www-form-urlencoded. — gMoney, Feb 02 '17 at 19:57

score 2 · Accepted Answer · edited May 23 '17 at 12:34

Ok, after talking with Slack support, it appears (at least) the WebAPIs I am calling don't yet support application/json. These do work with x-www-form-urlencoded.

Looking at this post

I was able to cobble together the following which auth'd successfully:

//up top
var request = require("request");

var querystring = require("querystring");

//...

app.get("/testAuth/test", function(req,res){
    console.log("in testAuth/test...sending test message to Slack");

    var bToken = process.env.TESTBOT_ACCESS_TOKEN;
    var message = {
        token: bToken
    };
    var messageString = querystring.stringify(message);
    var messageLength = messageString.length;
    var slackMessageURL = "https://slack.com/api/auth.test";
    var postOptions = {
        headers: {
            "Content-length": messageLength,
            "Content-type": "application/x-www-form-urlencoded"
        },
        uri: slackMessageURL,
        body: messageString,
        method: "POST"
    };
    request(postOptions, (error, response, body) => {
        if(error){
            console.log("OOPPPPS....we hit an error in auth.test: " + error);
        } else {
            console.log("auth.test response: " + JSON.stringify(response));
        }
    });
    res.send("Sent Test...check logs"); 
});

Slack WebAPI fails with not_authed

1 Answers1