Function downloadFile

scripts/emulator-tests/unzipEmulators.spec.ts:79–115

(url: string, targetPath: string)

});

async function downloadFile(url: string, targetPath: string): Promise<string> {
  const u = new URL(url);
  const c = new Client({ urlPrefix: u.origin, auth: false });

  const writeStream = fs.createWriteStream(targetPath);

  const res = await c.request<void, NodeJS.ReadableStream>({
    method: "GET",
    path: u.pathname,
    queryParams: u.searchParams,
    responseType: "stream",
    resolveOnHTTPError: true,
  });

  if (res.status !== 200) {
    throw new Error(
      `Download failed, file "${url}" does not exist. status ${
        res.status
      }: ${await res.response.text()}`,
      {
        cause: new Error(
          `Object returned by getDownloadDetails() from src${path.sep}emulator${path.sep}downloadableEmulators.ts contains invalid URL: ${url}`,
        ),
      },
    );
  }

  return new Promise<string>((resolve, reject) => {
    writeStream.on("finish", () => {
      resolve(targetPath);
    });
    writeStream.on("error", (err) => {
      reject(err);
    });
    res.body.pipe(writeStream);
  });
}