Request for Proxy Support for Incoming Webhooks (feature request)

[romanbalayan]

Description

It seems that the current version latest version (v4.6.0) does not support using of proxy for Incoming Webhooks, unlike Web API Client and RTM API Client. It seems to me that it should be possible to have the same implementation as with Web API and RTM API client, wherein a custom agent as a parameter of the constructor function as such:

using tunnel

const tunnel = require('tunnel');
const { IncomingWebhook } = require('@slack/client');

const webhookUrl = process.env.webhook_url;
const proxyUrl = process.env.http_proxy;
const proxyPort = process.env.http_proxy_port;

const agent = tunnel.httpsOverHttp({
    proxy: {
        host: proxyUrl,
        port: proxyPort,
    },
});

//Pass agent as argument on constructor
const incomingWebhook = new IncomingWebhook(webhookUrl, { agent: agent });

or using https-proxy-agent

const HttpsProxyAgent = require('https-proxy-agent');
const { IncomingWebhook } = require('@slack/client');

const webhookUrl = process.env.webhook_url;
const proxyUrl = process.env.http_proxy;

//Pass agent as argument on constructor
const incomingWebhook = new IncomingWebhook(webhookUrl, { agent: new HttpsProxyAgent(proxyUrl) });

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

• bug
• enhancement (feature request)
• question
• documentation 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.

[aoberoi]

This would totally be a great addition. At the moment, the core maintainers don’t see enhancements to IncomingWebhook as a priority, but PRs for this functionality would be happily accepted.