Replace Axios calls with HttpClient (#22417)

* replace axios calls with httpClient

* add latest files

* fix url

extensions/azurecore/src/proxy.ts

@@ -0,0 +1,61 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { HttpProxyAgent, HttpProxyAgentOptions } from 'http-proxy-agent';
+import { HttpsProxyAgent, HttpsProxyAgentOptions } from 'https-proxy-agent';
+import { parse as parseUrl, Url } from 'url';
+
+function getSystemProxyURL(requestURL: Url): string | undefined {
+	if (requestURL.protocol === 'http:') {
+		return process.env.HTTP_PROXY || process.env.http_proxy || undefined;
+	} else if (requestURL.protocol === 'https:') {
+		return process.env.HTTPS_PROXY || process.env.https_proxy || process.env.HTTP_PROXY || process.env.http_proxy || undefined;
+	}
+
+	return undefined;
+}
+
+export function isBoolean(obj: any): obj is boolean {
+	return obj === true || obj === false;
+}
+
+/*
+ * Returns the proxy agent using the proxy url in the parameters or the system proxy. Returns null if no proxy found
+ */
+export function getProxyAgent(requestURL: Url, proxy?: string, strictSSL?: boolean): HttpsProxyAgent | HttpProxyAgent | undefined {
+	const proxyURL = proxy || getSystemProxyURL(requestURL);
+	if (!proxyURL) {
+		return undefined;
+	}
+	const proxyEndpoint = parseUrl(proxyURL);
+	const opts = getProxyAgentOptions(requestURL, proxy, strictSSL);
+	return proxyEndpoint.protocol === 'https:' ? new HttpsProxyAgent(opts as HttpsProxyAgentOptions) : new HttpProxyAgent(opts as HttpProxyAgentOptions);
+}
+
+/*
+ * Returns the proxy agent using the proxy url in the parameters or the system proxy. Returns null if no proxy found
+ */
+export function getProxyAgentOptions(requestURL: Url, proxy?: string, strictSSL?: boolean): HttpsProxyAgentOptions | HttpProxyAgentOptions | undefined {
+	const proxyURL = proxy || getSystemProxyURL(requestURL);
+
+	if (!proxyURL) {
+		return undefined;
+	}
+
+	const proxyEndpoint = parseUrl(proxyURL);
+
+	if (!/^https?:$/.test(proxyEndpoint.protocol!)) {
+		return undefined;
+	}
+
+	const opts: HttpsProxyAgentOptions | HttpProxyAgentOptions = {
+		host: proxyEndpoint.hostname,
+		port: Number(proxyEndpoint.port),
+		auth: proxyEndpoint.auth,
+		rejectUnauthorized: isBoolean(strictSSL) ? strictSSL : true
+	};
+
+	return opts;
+}