Whatnot OA 面试真题解析：ipapi API Authentication and Example Response

After creating an account, you will be assigned a unique access key. To authenticate with the ipapi API interface, simply append your access_key parameter.

Example request:

https://api.ipapi.com/api/161.185.160.93?access_key=YOUR_ACCESS_KEY

Keep your API access key safe: your API access key is private and should be kept secure. You can disable your API access key immediately using your account dashboard at any time.

Example API response:

{
  "ip": "161.185.160.93",
  "type": "ipv4",
  "continent_code": "NA",
  "continent_name": "North America",
  "country_code": "US",
  "country_name": "United States",
  "region_code": "NY",
  "region_name": "New York",
  "city": "Bath Beach",
  "zip": "11201",
  "latitude": 40.69459915161133,
  "longitude": -73.99063873291016,
  "msa": "35620",
  "dma": "501",
  "radius": 30.012950897216797,
  "ip_routing_type": "fixed",
  "connection_type": "tx",
  "location": {
    "geoname_id": 5108111,
    "capital": "Washington D.C.",
    "languages": [
      {
        "code": "en",
        "name": "English",
        "native": "English"
      }
    ],
    "country_flag": "http://assets.ipapi.com/flags/us.svg"
  }
}

这道题展示的是如何调用 ipapi 地理位置接口：先获取并保护好自己的 access key，然后把它作为 query 参数追加到请求地址中，例如对指定 IP 发起查询即可返回完整的 JSON 结果。解题核心不是算法，而是理解 API 鉴权方式、请求 URL 的拼接规则，以及响应中常见字段如国家、地区、城市、经纬度和语言信息的含义。