index.js

async get(type, id) {
    const redirectedUrl = await new Promise(resolve => {
      https.get(`${this.base}/${type}/${id}`, res => {
        resolve(res.headers.location);
      });
    });
    const microdata = wae().parse(await getText(redirectedUrl));
    // TODO: how else could this data be shaped?
    return {
      isbn: _.property(["rdfa", 'ProductModel', 0, 'schema:isbn'])(microdata),
      oclc: _.property(["rdfa", 'CreativeWork', 0, 'library:oclcnum'])(microdata)
    };
  }