Function fetchAddressFromOSM

scripts/generators.js:144–197

* 调用 OpenStreetMap Nominatim API 获取真实地址（免费，无需 Key）

(lat, lon)

 * 调用 OpenStreetMap Nominatim API 获取真实地址（免费，无需 Key）
 */
async function fetchAddressFromOSM(lat, lon) {
  // 在城市中心附近小范围偏移 (约 300-500m)
  const offsetLat = lat + (Math.random() - 0.5) * 0.005;
  const offsetLon = lon + (Math.random() - 0.5) * 0.005;

  const url = `https://nominatim.openstreetmap.org/reverse?format=json&lat=${offsetLat}&lon=${offsetLon}&addressdetails=1&accept-language=en`;

  try {
    const response = await fetch(url, {
      headers: {
        'User-Agent': 'GeoFill-Extension/1.7.1'
      }
    });

    if (!response.ok) {
      console.log('[GeoFill] OSM Nominatim API 请求失败:', response.status);
      return null;
    }

    const data = await response.json();

    if (data && data.address) {
      const addr = data.address;
      // 构建街道地址
      let streetAddress = '';
      if (addr.house_number && addr.road) {
        streetAddress = `${addr.house_number} ${addr.road}`;
      } else if (addr.road) {
        streetAddress = `${Math.floor(Math.random() * 999) + 1} ${addr.road}`;
      } else if (addr.neighbourhood) {
        streetAddress = addr.neighbourhood;
      } else if (addr.suburb) {
        streetAddress = addr.suburb;
      }

      // 对于城市国家（新加坡、香港等），state 可能为空，使用 suburb 等代替
      const stateValue = addr.state || addr.province || addr.region ||
        addr.suburb || addr.neighbourhood || addr.county || '';

      return {
        address: streetAddress || data.display_name?.split(',')[0] || '',
        city: addr.city || addr.town || addr.village || addr.municipality || addr.county || '',
        state: stateValue,
        zipCode: addr.postcode || '',
        country: addr.country || '',
        source: 'openstreetmap'
      };
    }
  } catch (e) {
    console.log('[GeoFill] OSM Nominatim API 调用失败:', e);
  }

  return null;
}

/**
 * 智能获取真实地址：优先 Geoapify，备用 OSM