C#

Google Maps Geolocation Request

See more REST Examples

Demonstrates how make a Google Maps Geolocation REST API request. C#

bool 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.

Chilkat.Rest rest = new Chilkat.Rest();

//  Connect to the Google API REST server.
bool bTls = true;
int port = 443;
bool 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
//    }
//   ]
//  }

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

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

Chilkat.JsonObject 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);

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

Chilkat.JsonObject 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);

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

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

json.EmitCompact = false;
Debug.WriteLine("JSON request body: " + json.Emit());

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

Debug.WriteLine("JSON response: " + responseJson);

Chilkat.JsonObject jsonResp = new Chilkat.JsonObject();
jsonResp.Load(responseJson);

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

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

string accuracy = jsonResp.StringOf("accuracy");
Debug.WriteLine("accuracy = " + accuracy);