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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only
import * as vscode from 'vscode';
import * as fs from 'fs';
import * as http from 'http';
import * as https from 'https';
export async function download(
url: string,
destPath: string,
token?: vscode.CancellationToken,
reportCallback?: (progress: number, max: number) => void
) {
let downloadUrl = url;
const MaxRedirects = 10;
const controller = new AbortController();
token?.onCancellationRequested(() => {
controller.abort();
});
for (let i = 0; i < MaxRedirects; ++i) {
if (!downloadUrl) {
throw Error('Invalid download URL');
}
const res = await getHttps(downloadUrl, controller);
if (!res.statusCode) {
throw Error(`Invalid status code ${res.statusCode}`);
}
if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
downloadUrl = res.headers.location;
continue;
}
return downloadOctetStream(res, destPath, token, reportCallback);
}
}
async function downloadOctetStream(
res: http.IncomingMessage,
destPath: string,
token?: vscode.CancellationToken,
reportCallback?: (progress: number, max: number) => void
) {
return new Promise<void>((resolve, reject) => {
if (!res.statusCode) {
reject(new Error('No response'));
return;
}
token?.onCancellationRequested(() => {
reject(new Error('User canceled'));
});
if (res.statusCode < 200 || res.statusCode >= 300) {
reject(new Error(`Unexpected status, ${res.statusCode}`));
return;
}
if (res.headers['content-type'] !== 'application/octet-stream') {
reject(new Error('HTTP response does not contain an octet stream'));
return;
}
const fileStream = fs.createWriteStream(destPath, { mode: 0o600 });
const pipeStream = res.pipe(fileStream);
pipeStream.on('finish', resolve);
pipeStream.on('error', reject);
res.on('error', reject);
if (reportCallback) {
const length = res.headers['content-length'];
const maxBytes = length ? Number.parseInt(length) : 100;
let downloadedBytes = 0;
res.on('data', (chunk) => {
downloadedBytes += (chunk as Buffer).length;
reportCallback(downloadedBytes, maxBytes);
});
}
});
}
async function getHttps(url: string, controller: AbortController) {
return new Promise<http.IncomingMessage>((resolve, reject) => {
const request = https.get(url, { signal: controller.signal }, resolve);
request.on('error', reject);
});
}
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