Node.js

Google Maps Geolocation Request

See more REST Examples

Demonstrates how make a Google Maps Geolocation REST API request. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  This example duplicates the following CURL request:
    //  curl -d @your_filename.json -H "Content-Type: application/json" -i "https://www.googleapis.com/geolocation/v1/geolocate?key=YOUR_API_KEY"

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    var rest = new chilkat.Rest();

    //  Connect to the Google API REST server.
    var bTls = true;
    var port = 443;
    var bAutoReconnect = true;
    success = rest.Connect("www.googleapis.com",port,bTls,bAutoReconnect);

    //  Add the Content-Type request header.
    rest.AddHeader("Content-Type","application/json");

    //  Add your API key as a query parameter
    rest.AddQueryParam("key","YOUR_API_KEY");

    //  The JSON query is contained in the body of the HTTP POST.
    //  This is a sample query (which we'll dynamically build in this example)
    //  { 
    //   "homeMobileCountryCode": 310,
    //   "homeMobileNetworkCode": 260,
    //   "radioType": "gsm",
    //   "carrier": "T-Mobile",
    //   "cellTowers": [
    //    {
    //     "cellId": 39627456,
    //     "locationAreaCode": 40495,
    //     "mobileCountryCode": 310,
    //     "mobileNetworkCode": 260,
    //     "age": 0,
    //     "signalStrength": -95
    //    }
    //   ],
    //   "wifiAccessPoints": [
    //    { 
    //     "macAddress": "01:23:45:67:89:AB",
    //     "signalStrength": 8,
    //     "age": 0,
    //     "signalToNoiseRatio": -65,
    //     "channel": 8
    //    },
    //    { 
    //     "macAddress": "01:23:45:67:89:AC",
    //     "signalStrength": 4,
    //     "age": 0
    //    }
    //   ]
    //  }

    var json = new chilkat.JsonObject();
    json.AppendInt("homeMobileCountryCode",310);
    json.AppendInt("homeMobileNetworkCode",260);
    json.AppendString("radioType","gsm");
    json.AppendString("carrier","T-Mobile");

    var aCellTowers = new chilkat.JsonArray();
    json.AppendArray2("cellTowers",aCellTowers);

    var oCellTower = new chilkat.JsonObject();
    aCellTowers.AddObjectAt2(0,oCellTower);
    oCellTower.AppendInt("cellId",39627456);
    oCellTower.AppendInt("locationAreaCode",40495);
    oCellTower.AppendInt("mobileCountryCode",310);
    oCellTower.AppendInt("mobileNetworkCode",260);
    oCellTower.AppendInt("age",0);
    oCellTower.AppendInt("signalStrength",-95);

    var aWifi = new chilkat.JsonArray();
    json.AppendArray2("wifiAccessPoints",aWifi);

    var oPoint = new chilkat.JsonObject();
    aWifi.AddObjectAt2(0,oPoint);
    oPoint.AppendString("macAddress","01:23:45:67:89:AB");
    oPoint.AppendInt("signalStrength",8);
    oPoint.AppendInt("age",0);
    oPoint.AppendInt("signalToNoiseRatio",-65);
    oPoint.AppendInt("channel",8);

    aWifi.AddObjectAt2(1,oPoint);
    oPoint.AppendString("macAddress","01:23:45:67:89:AC");
    oPoint.AppendInt("signalStrength",4);
    oPoint.AppendInt("age",0);

    var responseJson = rest.FullRequestString("POST","/geolocation/v1/geolocate",json.Emit());
    if (rest.LastMethodSuccess == false) {
        console.log(rest.LastErrorText);
        return;
    }

    //  When successful, the response code is 200.
    if (rest.ResponseStatusCode !== 200) {
        //  Examine the request/response to see what happened.
        console.log("response status code = " + rest.ResponseStatusCode);
        console.log("response status text = " + rest.ResponseStatusText);
        console.log("response header: " + rest.ResponseHeader);
        console.log("response JSON: " + responseJson);
        console.log("---");
        console.log("LastRequestStartLine: " + rest.LastRequestStartLine);
        console.log("LastRequestHeader: " + rest.LastRequestHeader);
        return;
    }

    json.EmitCompact = false;
    console.log("JSON request body: " + json.Emit());

    //  The JSON response should look like this:
    //  { 
    //   "location": {
    //    "lat": 37.4248297,
    //    "lng": -122.07346549999998
    //   },
    //   "accuracy": 1145.0
    //  }

    console.log("JSON response: " + responseJson);

    var jsonResp = new chilkat.JsonObject();
    jsonResp.Load(responseJson);

    var jsonLoc = new chilkat.JsonObject();
    jsonResp.ObjectOf2("location",jsonLoc);

    //  Any JSON value can be obtained as a string..
    var latitude = jsonLoc.StringOf("lat");
    console.log("latitude = " + latitude);
    var longitude = jsonLoc.StringOf("lng");
    console.log("longitude = " + longitude);

    var accuracy = jsonResp.StringOf("accuracy");
    console.log("accuracy = " + accuracy);

}

chilkatExample();