Proxy Support broken on Slack App approach (Slack Bot Token approach)

[frednntelia]

Description

When using the slack-github-action in GitHub App mode, the Action fails to utilize environment variables HTTPS_PROXY and https_proxy correctly.

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

• bug
• enhancement (feature request)
• question
• documentation related
• example code related
• testing related
• discussion

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.

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Bug Report

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

Reproducible in:

package version: slackapi/slack-github-action@v1.24.0

node version:

OS version(s): Ubuntu 20.04 LTS

Steps to reproduce:

1. run slack-github-action behind a proxy
2. make sure you set HTTPS_PROXY and https_proxy env vars
3. use slack webhook method
4. observe success
5. use slack app method (slack bot token)
6. observe failure

Expected result:

HTTPS_PROXY var is respected and slack api call goes through properly, resulting in the display of a message on the respective channel.

Actual result:

Slack message never arrives in channel. Likely because HTTPS_PROXY env var is not being respected

Attachments:

[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 3.***.***.153:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 18.***.***.***:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 3.***.***.98:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 3.***.***.98:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 18.***.***.225:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 3.***.***.98:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 18.***.***.***:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 3.***.***.153:443
[WARN]  web-api:WebClient:0 http request failed connect ETIMEDOUT 18.***.***.225:443
Error: The operation was canceled.

[WilliamBergamin]

Hello @frednntelia thanks for writing in 💯

This is a curious behavior, would be able to tell me if the proxy you are using is http or https?

Based on this test suite seems like webhook method should use default axios config when proxy uses HTTPS

[frednntelia]

Hi @WilliamBergamin, thanks for your swift response! 👍🏾
This proxy in my assembly is http afaik.

[frednntelia]

@WilliamBergamin is there a way to enable debug level logs from this Action, so that we can get some more context?

[WilliamBergamin]

Based on what I can see in the code there seems to be a bug where HTTP proxies are not properly set but HTTPS proxies are, I am not sure if there is a reason behind this

[minjun0219]

The Slack Bot Token Proxy was updated in June (#205), but the release was last in May (v1.24.0).
Do you happen to know when there will be a release plan for this update?

[joshsnelling]

Is there a plan to release this fix? If not, is there a workaround that can be used in the meantime?

[zimeg]

👋 Just confirmed that support for the proxy input is still working for both method and webhook techniques in slackapi/slack-github-action@v2.0.0! At least when sending to HTTP proxies 👀

It seems like support for a proxy with the token method was also released in v1.2.5, but we might've let this issue slip!

The current documentation gives a bit more info on using this, but for all techniques the proxy input can be used:

- name: Post to a Slack channel via a proxy
  uses: slackapi/slack-github-action@v2.0.0
  with:
    method: chat.postMessage
    proxy: "http://proxy.example.org:8080" # Change this to a custom value
    token: ${{ secrets.SLACK_BOT_TOKEN }}
    payload: |
      channel: ${{ secrets.SLACK_CHANNEL_ID }}
      text: "This message was sent through a proxy"

Going to close this issue as completed, but please feel free to follow up with questions if this doesn't seem to be working as expected 🙏