receiverAckTimeoutError should not throw if authorization of incoming event fails #364

zachsirotto · 2020-01-02T19:54:54Z

Description

When an incoming event fails to authenticate via Bolt's authorizeFn, the following warning is thrown:

https://github.com/slackapi/bolt/blob/227421b324bcf5548d1263db7b61fc66eb407908/src/App.ts#L395

Then, the following error is thrown that the incoming event is not acknowledged.

https://github.com/slackapi/bolt/blob/6cd88eb3a6246405dee9afe06f793ed7c59958f2/src/ExpressReceiver.ts#L75-L78

Is this the expected design? If listeners are not being called, why do we need to call ack()?

What type of issue is this? (place an `x` in one of the `[ ]`)

Requirements (place an `x` in each of the `[ ]`)

I've read and understood the Contributing guidelines and have done my best effort to follow them.
I've read and agree to the Code of Conduct.
I've searched for any related issues and avoided creating a duplicate issue.

Bug Report

Filling out the following details about bugs will help us solve your issue sooner.

Reproducible in:

package version: >= 1.2.0

node version: v12.12.0

OS version(s): macOS Catalina 10.15.1

Steps to reproduce:

With authorizeFn, do not authorize an incoming event.

Expected result:

Incoming event is not sent to listeners. receiverAckTimeoutError is not thrown.

Actual result:

receiverAckTimeoutError is thrown.

Attachments:

   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR { Error: Authorization of incoming event did not succeed.
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR     at Object.errorWithCode (/home/vcap/deps/0/node_modules/@slack/bolt/dist/errors.js:17:19)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR     at authorizationErrorFromOriginal (/home/vcap/deps/0/node_modules/@slack/bolt/dist/App.js:293:28)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR     at authorizeResult.authorize.catch (/home/vcap/deps/0/node_modules/@slack/bolt/dist/App.js:145:32)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR     at process._tickCallback (internal/process/next_tick.js:68:7)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR   code: 'slack_bolt_authorization_error',
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR   original:
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR    Error: No matching authorizations for E27SFGS2W:T0258Q0SG
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at App.module.exports [as authorize] (/home/vcap/app/src/authorizeFn.js:15:15)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at App.onIncomingEvent (/home/vcap/deps/0/node_modules/@slack/bolt/dist/App.js:144:45)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at ExpressReceiver.App.receiver.on.message (/home/vcap/deps/0/node_modules/@slack/bolt/dist/App.js:55:53)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at ExpressReceiver.emit (events.js:198:13)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at ExpressReceiver.requestHandler (/home/vcap/deps/0/node_modules/@slack/bolt/dist/ExpressReceiver.js:70:14)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at Layer.handle [as handle_request] (/home/vcap/deps/0/node_modules/express/lib/router/layer.js:95:5)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at next (/home/vcap/deps/0/node_modules/express/lib/router/route.js:137:13)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at respondToUrlVerification (/home/vcap/deps/0/node_modules/@slack/bolt/dist/ExpressReceiver.js:122:5)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at Layer.handle [as handle_request] (/home/vcap/deps/0/node_modules/express/lib/router/layer.js:95:5)
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR        at next (/home/vcap/deps/0/node_modules/express/lib/router/route.js:137:13) }
   2020-01-02T15:25:13.64-0500 [APP/PROC/WEB/0] ERR [WARN]   Authorization of incoming event did not succeed. No listeners will be called.
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR { Error: An incoming event was not acknowledged before the timeout. Ensure that the ack() argument is called in your listeners.
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR     at receiverAckTimeoutError (/home/vcap/deps/0/node_modules/@slack/bolt/dist/ExpressReceiver.js:213:19)
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR     at Timeout.setTimeout [as _onTimeout] (/home/vcap/deps/0/node_modules/@slack/bolt/dist/ExpressReceiver.js:39:32)
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR     at ontimeout (timers.js:436:11)
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR     at tryOnTimeout (timers.js:300:5)
   2020-01-02T15:25:16.44-0500 [APP/PROC/WEB/0] ERR     at listOnTimeout (timers.js:263:5)

The text was updated successfully, but these errors were encountered:

seratch · 2020-01-03T05:18:22Z

👋Thank you for flagging this up.

Ensure that the ack() argument is called in your listeners

I agree that this part of the error message is not relevant to this case.

Currently, Bolt doesn't respond to a request in the case mentioned here. In the case of denied requests, personally I prefer to respond with HTTP status code 40x than just not responding.

However, if Bolt changes the behavior to respond with an error status code in future versions, it needs updates on the interface between App and Receiver first. Currently, App class doesn't have any means to tell Receivers to respond with a specific HTTP status code.

I would like to know @aoberoi @stevengill 's thoughts on this.

zachsirotto · 2020-01-03T14:04:36Z

@seratch I would like to respond to the denied request but i'm unsure how to do that from the scope of the authorizeFn since the passed in parameters are only { teamId, enterpriseId }. How are you doing this?

seratch · 2020-01-03T14:40:36Z

@zachsirotto

How are you doing this?

At this moment, it's not possible to respond to requests in the case.

However, if Bolt changes the behavior to respond with an error status code in future versions, it needs updates on the interface between App and Receiver first.

That's why I mentioned the necessity to change App & Receiver if Bolt changes its internals to allow developers to specify response status code.

barlock · 2020-01-03T18:07:46Z

@aoberoi ☝️ This is a really good example of why I think App.processEvent in the proposal #353 (comment) should reject with an error.

zachsirotto · 2020-02-14T17:12:40Z

Is it possible to prevent receiverAckTimeoutError from being thrown when a request is rejected? I don't understand why it would be relevant to throw this error for unauthenticated requests.

zachsirotto · 2020-03-12T15:34:55Z

@seratch do you have any suggestions to prevent this error from firing?

{ Error: An incoming event was not acknowledged before the timeout. Ensure that the ack() argument is called in your listeners.
    at receiverAckTimeoutError (/node_modules/@slack/bolt/dist/ExpressReceiver.js:225:19)
    at Timeout.setTimeout [as _onTimeout] (/node_modules/@slack/bolt/dist/ExpressReceiver.js:43:32)
    at ontimeout (timers.js:436:11)
    at tryOnTimeout (timers.js:300:5)
    at listOnTimeout (timers.js:263:5)
    at Timer.processTimers (timers.js:223:10) code: 'slack_bolt_receiver_ack_timeout_error' }

zachsirotto · 2020-04-13T14:56:38Z

@stevengill are there any temporary workarounds that I can perform to prevent this error / warning from firing? It creates a lot of noise.

seratch · 2021-08-18T09:48:53Z

#891 can improve this. When I started working on the pull request again, I will check if it resolves this issue as well.

seratch · 2021-08-26T03:57:13Z

I've confirmed that #891 can resolve this issue.

import { App, ExpressReceiver } from '@slack/bolt';
const app = new App({
  receiver: new ExpressReceiver({
    signingSecret: process.env.SLACK_SIGNING_SECRET!!,
  }),
  authorize: async (_) => { throw new Error("Failed!"); }
});

The above example app returns 401 HTTP status and shows the following logs only:

[WARN]  bolt-app Authorization of incoming event did not succeed. No listeners will be called.
[ERROR]  bolt-app Error: Failed!
    at /Users/ksera/github/bolt-js/examples/getting-started-typescript/dist/app.js:25:15
    at Generator.next (<anonymous>)
    at /Users/ksera/github/bolt-js/examples/getting-started-typescript/dist/app.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/ksera/github/bolt-js/examples/getting-started-typescript/dist/app.js:4:12)
    at App.authorize (/Users/ksera/github/bolt-js/examples/getting-started-typescript/dist/app.js:24:23)
    at App.processEvent (/Users/ksera/github/bolt-js/dist/App.js:375:46)
    at ExpressReceiver.requestHandler (/Users/ksera/github/bolt-js/dist/receivers/ExpressReceiver.js:154:77)
    at Layer.handle [as handle_request] (/Users/ksera/github/bolt-js/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/ksera/github/bolt-js/node_modules/express/lib/router/route.js:137:13) {
  code: 'slack_bolt_authorization_error'
}

seratch added discussion M-T: An issue where more input is needed to reach a decision good first issue Good for newcomers labels Jan 3, 2020

stevengill added bug M-T: confirmed bug report. Issues are confirmed when the reproduction steps are documented and removed discussion M-T: An issue where more input is needed to reach a decision good first issue Good for newcomers labels Apr 2, 2020

seratch added this to the 3.6.0 milestone Aug 18, 2021

srajiang modified the milestones: 3.6.0, 3.7.0 Aug 19, 2021

seratch mentioned this issue Aug 26, 2021

Fix #859 Improve the way to handle authorize fn errors in built-in receivers #891

Merged

2 tasks

seratch self-assigned this Aug 26, 2021

seratch closed this as completed in #891 Aug 28, 2021

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receiverAckTimeoutError should not throw if authorization of incoming event fails #364

receiverAckTimeoutError should not throw if authorization of incoming event fails #364

zachsirotto commented Jan 2, 2020 •

edited

seratch commented Jan 3, 2020

zachsirotto commented Jan 3, 2020

seratch commented Jan 3, 2020

barlock commented Jan 3, 2020

zachsirotto commented Feb 14, 2020

zachsirotto commented Mar 12, 2020

zachsirotto commented Apr 13, 2020

seratch commented Aug 18, 2021

seratch commented Aug 26, 2021

receiverAckTimeoutError should not throw if authorization of incoming event fails #364

receiverAckTimeoutError should not throw if authorization of incoming event fails #364

Comments

zachsirotto commented Jan 2, 2020 • edited

Description

What type of issue is this? (place an x in one of the [ ])

Requirements (place an x in each of the [ ])

Bug Report

Reproducible in:

Steps to reproduce:

Expected result:

Actual result:

Attachments:

seratch commented Jan 3, 2020

zachsirotto commented Jan 3, 2020

seratch commented Jan 3, 2020

barlock commented Jan 3, 2020

zachsirotto commented Feb 14, 2020

zachsirotto commented Mar 12, 2020

zachsirotto commented Apr 13, 2020

seratch commented Aug 18, 2021

seratch commented Aug 26, 2021

zachsirotto commented Jan 2, 2020 •

edited

What type of issue is this? (place an `x` in one of the `[ ]`)

Requirements (place an `x` in each of the `[ ]`)