我们正在使用 Google 的地理定位 API 来获取 wifi 接入点的 latlong。我们看到了不一致的结果。Google 的 API 在不同的盒子上返回不同的 latlong。当我在我的开发盒上进行测试时,我得到了指向美国某个位置的 latlong。当我在 amazon ec2 盒子上进行测试时,我得到了指向日本某个位置的 latlong。其他人对 Google 的 GeoLocation API 有过同样的经历吗?
下面是来自两个主机的代码和响应字符串。两个主机上的 JDK 和 JSON jar 版本相同。
public void testWifiIdMappingApi() {
String apiUrl = "https://www.googleapis.com/geolocation/v1/geolocate?key=xxxxxxxxxxxxxxxxxxxxxxxx";
InputStream inputStream = null;
HttpsURLConnection con = null;
DataOutputStream wr = null;
try {
URL url = new URL(apiUrl);
con = (HttpsURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/json");
con.setDoInput(true);
con.setDoOutput(true);
con.connect();
JSONObject obj = new JSONObject();
JSONArray wifiAry = new JSONArray();
JSONObject wifiObj = new JSONObject();
wifiObj.put("macAddress", "6c:f3:7f:4b:37:74");
wifiObj.put("signalStrength", 60);
wifiAry.add(wifiObj);
wifiObj = new JSONObject();
wifiObj.put("macAddress", "6c:f3:7f:4b:37:75");
wifiObj.put("signalStrength", 60);
wifiAry.add(wifiObj);
obj.put("wifiAccessPoints", wifiAry);
System.out.println(obj.toString());
wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(obj.toString());
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
inputStream = null;
if (responseCode == HttpsURLConnection.HTTP_OK) {
inputStream = con.getInputStream();
} else {
inputStream = con.getErrorStream();
}
final char[] buffer = new char[4096];
StringBuilder response = new StringBuilder();
Reader r = new InputStreamReader(inputStream, "UTF-8");
int read;
do {
read = r.read(buffer, 0, buffer.length);
if (read > 0) {
response.append(buffer, 0, read);
}
} while (read >= 0);
System.out.println(new java.util.Date() + " - "
+ response.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (inputStream != null)
inputStream.close();
if (wr != null)
wr.close();
if (con != null)
con.disconnect();
} catch (Exception e) {
}
}
}
输入 JSON 字符串
{"wifiAccessPoints":[{"signalStrength":60,"macAddress":"6c:f3:7f:4b:37:74"}, {"signalStrength":60,"macAddress":"6c:f3:7f: 4b:37:75"}]}
亚马逊 ec2 主机上的响应 { "location": { "lat": 40.603124, "lng": 140.463922 }, "accuracy": 122000.0 }
对我的开发框的响应(Windows 7)
{“位置”:{“纬度”:37.593392,“lng”:-122.04383},“准确度”:22000.0}