Function DownloadFile

src/packageManager/fileDownloader.ts:22–53

(
    description: string,
    eventStream: EventStream,
    networkSettingsProvider: NetworkSettingsProvider,
    url: string,
    fallbackUrl?: string,
    token?: CancellationToken
)

import { CancellationToken } from 'vscode';

export async function DownloadFile(
    description: string,
    eventStream: EventStream,
    networkSettingsProvider: NetworkSettingsProvider,
    url: string,
    fallbackUrl?: string,
    token?: CancellationToken
): Promise<Buffer> {
    eventStream.post(new DownloadStart(description));

    try {
        const buffer = await downloadFile(description, url, eventStream, networkSettingsProvider, token);
        eventStream.post(new DownloadSuccess(` Done!`));
        return buffer;
    } catch (primaryUrlError) {
        // If the package has a fallback Url, and downloading from the primary Url failed, try again from
        // the fallback. This is used for debugger packages as some users have had issues downloading from
        // the CDN link
        if (fallbackUrl !== undefined) {
            eventStream.post(new DownloadFallBack(fallbackUrl));
            try {
                const buffer = await downloadFile(description, fallbackUrl, eventStream, networkSettingsProvider);
                eventStream.post(new DownloadSuccess(' Done!'));
                return buffer;
            } catch (_) {
                throw primaryUrlError;
            }
        } else {
            throw primaryUrlError;
        }
    }
}

async function downloadFile(
    description: string,