Add support for outgoing request proxying

Closes #2824

src/request-proxy.js

@@ -0,0 +1,52 @@
+const http = require('node:http');
+const https = require('node:https');
+
+const { getConfigValue, isValidUrl, color } = require('./util.js');
+
+const LOG_HEADER = '[Request Proxy]';
+
+function initRequestProxy() {
+    try {
+        const { ProxyAgent } = require('proxy-agent');
+        const proxyEnabled = getConfigValue('requestProxy.enabled', false);
+
+        // No proxy is enabled, so return
+        if (!proxyEnabled) {
+            return;
+        }
+
+        const proxyUrl = getConfigValue('requestProxy.url', '');
+
+        if (!proxyUrl) {
+            console.error(color.red(LOG_HEADER), 'No proxy URL provided');
+            return;
+        }
+
+        if (!isValidUrl(proxyUrl)) {
+            console.error(color.red(LOG_HEADER), 'Invalid proxy URL provided');
+            return;
+        }
+
+        // ProxyAgent uses proxy-from-env under the hood
+        // Reference: https://github.com/Rob--W/proxy-from-env
+        process.env.all_proxy = proxyUrl;
+
+        const proxyBypass = getConfigValue('requestProxy.bypass', []);
+
+        if (Array.isArray(proxyBypass) && proxyBypass.length > 0) {
+            process.env.no_proxy = proxyBypass.join(',');
+        }
+
+        const proxyAgent = new ProxyAgent();
+        http.globalAgent = proxyAgent;
+        https.globalAgent = proxyAgent;
+
+        console.log();
+        console.log(color.green(LOG_HEADER), 'Proxy URL is used:', color.blue(proxyUrl));
+        console.log();
+    } catch (error) {
+        console.error(color.red(LOG_HEADER), 'Failed to initialize request proxy:', error);
+    }
+}
+
+module.exports = initRequestProxy;