PROSAGA码农传奇-opentsdb-打字稿-使用访存和异步访问Open Trivia数据库

我们正在修改的Trivia游戏使用TypeScript及其自己的本地数据库来代替Open Trivia DB。有很多我不想弄乱的异步/等待功能（在需要旧数据库功能的情况下），因此我开始使用Fetch。到目前为止，这是我的代码：
<pre><code>public async getCategories() {
 let cats = null;
 let counts = null;
 if (!this.IS_USING_OTDB) {
 cats = await this.db.query('SELECT DISTINCT categoryid, category FROM questionsTest ORDER BY categoryid');
 counts = await this.db.query('SELECT categoryid, category, difficulty, count(*) FROM questionsTest GROUP by categoryid, category, difficulty ORDER BY count DESC');
 console.log(cats.rows, cats.rowCount, counts.rows);
 } else {
 console.log('Connecting to opentdb instead of postgres.');
 const fetchResult = await fetch('https://opentdb.com/api_category.php');
 console.log(fetchResult);
 const body = fetchResult.json;
 console.log(JSON.stringify(body));
 }
 // more code for processing here
}
</code></pre>从本质上讲，它不会崩溃，它本身就可以工作。但是，结果（控制台已记录fetchResult）不是我所期望的：
<pre><code>Response {
 size: 0,
 timeout: 0,
 [Symbol(Body internals)]: {
 body: PassThrough {
 _readableState: [ReadableState],
 readable: true,
 _events: [Object: null prototype],
 _eventsCount: 5,
 _maxListeners: undefined,
 _writableState: [WritableState],
 writable: true,
 allowHalfOpen: true,
 _transformState: [Object],
 [Symbol(kCapture)]: false
 },
 disturbed: false,
 error: null
 },
 [Symbol(Response internals)]: {
 url: 'https://opentdb.com/api_category.php',
 status: 200,
 statusText: 'OK',
 headers: Headers { [Symbol(map)]: [Object: null prototype] },
 counter: 0
 }
}
</code></pre>的JSON分类结果fetchResult.json也是undefined。这很奇怪，因为链接https://opentdb.com/api_category.php会立即返回以下内容（您可以通过单击上面的链接自行检查它）：
<pre><code>{"trivia_categories":[{"id":9,"name":"General Knowledge"},{"id":10,"name":"Entertainment: Books"},{"id":11,"name":"Entertainment: Film"},{"id":12,"name":"Entertainment: Music"},{"id":13,"name":"Entertainment: Musicals & Theatres"},{"id":14,"name":"Entertainment: Television"},{"id":15,"name":"Entertainment: Video Games"},{"id":16,"name":"Entertainment: Board Games"},{"id":17,"name":"Science & Nature"},{"id":18,"name":"Science: Computers"},{"id":19,"name":"Science: Mathematics"},{"id":20,"name":"Mythology"},{"id":21,"name":"Sports"},{"id":22,"name":"Geography"},{"id":23,"name":"History"},{"id":24,"name":"Politics"},{"id":25,"name":"Art"},{"id":26,"name":"Celebrities"},{"id":27,"name":"Animals"},{"id":28,"name":"Vehicles"},{"id":29,"name":"Entertainment: Comics"},{"id":30,"name":"Science: Gadgets"},{"id":31,"name":"Entertainment: Japanese Anime & Manga"},{"id":32,"name":"Entertainment: Cartoon & Animations"}]}
</code></pre>如何从URL中获取上述结果？我有想念吗？