Add azcli extension (#16029)

extensions/azcli/src/common/httpClient.ts

@@ -0,0 +1,103 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as fs from 'fs';
+import * as request from 'request';
+import * as path from 'path';
+import * as loc from '../localizedConstants';
+import Logger from './logger';
+
+const DownloadTimeout = 20000;
+
+export namespace HttpClient {
+
+	/**
+	 * Downloads a file from the given URL, resolving to the full path of the downloaded file when complete
+	 * @param downloadUrl The URL to download the file from
+	 * @param targetFolder The folder to download the file to
+	 * @returns a promise to a full path to the downloaded file
+	 */
+	export function downloadFile(downloadUrl: string, targetFolder: string): Promise<string> {
+		return download(downloadUrl, targetFolder);
+	}
+
+	/**
+	 * Downloads the text contents of the document at the given URL, resolving to a string containing the text when complete
+	 * @param url The URL of the document whose contents need to be fetched
+	 * @returns a promise to a string that has the contents of document at the provided url
+	 */
+	export async function getTextContent(url: string): Promise<string> {
+		Logger.log(loc.gettingTextContentsOfUrl(url));
+		return await download(url);
+	}
+
+	/**
+	 * Gets a file/fileContents at the given URL.
+	 * @param downloadUrl The URL to download the file from
+	 * @param targetFolder The folder to download the file to. If not defined then return value is the contents of the downloaded file.
+	 * @returns Full path to the downloaded file or the contents of the file at the given downloadUrl
+	 */
+	function download(downloadUrl: string, targetFolder?: string): Promise<string> {
+		return new Promise((resolve, reject) => {
+			let totalMegaBytes: number | undefined = undefined;
+			let receivedBytes = 0;
+			let printThreshold = 0.1;
+			let strings: string[] = [];
+			let downloadRequest = request.get(downloadUrl, { timeout: DownloadTimeout })
+				.on('error', downloadError => {
+					Logger.log(loc.downloadError);
+					Logger.log(downloadError?.message ?? downloadError);
+					reject(downloadError);
+				})
+				.on('response', (response) => {
+					if (response.statusCode !== 200) {
+						Logger.log(loc.downloadError);
+						Logger.log(response.statusMessage);
+						Logger.log(`response code: ${response.statusCode}`);
+						return reject(response.statusMessage);
+					}
+					if (targetFolder !== undefined) {
+						const filename = path.basename(response.request.path);
+						const targetPath = path.join(targetFolder, filename);
+						Logger.log(loc.downloadingTo(filename, downloadUrl, targetPath));
+						// Wait to create the WriteStream until here so we can use the actual
+						// filename based off of the URI.
+						downloadRequest.pipe(fs.createWriteStream(targetPath))
+							.on('close', async () => {
+								Logger.log(loc.downloadFinished);
+								resolve(targetPath);
+							})
+							.on('error', (downloadError) => {
+								reject(downloadError);
+								downloadRequest.abort();
+							});
+					} else {
+						response.on('end', () => {
+							Logger.log(loc.downloadFinished);
+							resolve(strings.join(''));
+						});
+					}
+					let contentLength = response.headers['content-length'];
+					let totalBytes = parseInt(contentLength || '0');
+					totalMegaBytes = totalBytes / (1024 * 1024);
+					Logger.log(loc.downloadingProgressMb('0', totalMegaBytes.toFixed(2)));
+				})
+				.on('data', (data) => {
+					if (targetFolder === undefined) {
+						strings.push(data.toString('utf-8'));
+					}
+					receivedBytes += data.length;
+					if (totalMegaBytes) {
+						let receivedMegaBytes = receivedBytes / (1024 * 1024);
+						let percentage = receivedMegaBytes / totalMegaBytes;
+						if (percentage >= printThreshold) {
+							Logger.log(loc.downloadingProgressMb(receivedMegaBytes.toFixed(2), totalMegaBytes.toFixed(2)));
+							printThreshold += 0.1;
+						}
+					}
+				});
+		});
+	}
+}