Google Places API next_page_token永远不会为附近的搜索返回“确定”响应

Question

我正在尝试通过Google Places API使用附近的搜索，并且正在尝试获取下一页的结果。我了解下一页令牌在您上次请求后的几秒钟之内无效。但是，令牌永远不会返回状态为“ OK”的结果。

如何从附近的搜索请求中获得一致的“确定”状态响应？

  const location = {latitude: 37.822919, longitude: -122.000685};
  const place_types = ["premise", "establishment"];
  //Get initial response (which works) and includes next page token if > 20 results
  const response = await fetch(
    'https://maps.googleapis.com/maps/api/place/nearbysearch/json? location=' +
     location.latitude + ',' + location.longitude + '&radius=150' +
    '&types=' + place_types.toString() + '&key=' + API_KEY);
  const responseJson = await response.json();
  let status, responseJson2;
  let now = new Date();

  do {
    await new Promise(resolve => {
      setTimeout(resolve, 100);
    });

    const response2 = await fetch(
      'https://maps.googleapis.com/maps/api/place/nearbysearch/json?' +
      'key=' + API_KEY + '&pagetoken=' + next_page_token,
    );
    responseJson2 = await response2.json();

    status = responseJson2.status;
    console.log(status)

    if (new Date() - now > 10000) {
      console.log('[ERROR] Timeout waiting for valid next page token.');
      break;
    }
  } while (status === 'INVALID_REQUEST');

当前输出：[ERROR] Timeout waiting for valid next page token.

如您所见，如果设置时间超过30秒，我将设置超时条件以中断循环。但是，我已经测试了没有此代码的代码，并且让它等待几分钟的“ OK”响应而没有成功。

还请注意，我没有包括next_page_token变量的初始化，但它确实具有下一页标记作为其值。

Answer 1

在每个新请求的末尾添加一个请求计数，以避免Google缓存的响应：

  const location = {latitude: 37.822919, longitude: -122.000685};
  const place_types = ["premise", "establishment"];
  //Get initial response (which works) and includes next page token if > 20 results
  const response = await fetch(
    'https://maps.googleapis.com/maps/api/place/nearbysearch/json? location=' +
     location.latitude + ',' + location.longitude + '&radius=150' +
    '&types=' + place_types.toString() + '&key=' + API_KEY);
  const responseJson = await response.json();
  let status, responseJson2;
  let now = new Date();
  let request_count = 0;

  do {
    await new Promise(resolve => {
      setTimeout(resolve, 100);
    });

    const response2 = await fetch(
      'https://maps.googleapis.com/maps/api/place/nearbysearch/json?' +
      'key=' + API_KEY + '&pagetoken=' + next_page_token + '&request_count=' + request_count,
    );
    responseJson2 = await response2.json();

    status = responseJson2.status;
    console.log(status)

    if (new Date() - now > 10000) {
      console.log('[ERROR] Timeout waiting for valid next page token.');
      break;
    }
    request_count++;
  } while (status === 'INVALID_REQUEST');