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(Excel) Google Maps Geolocation Request

Demonstrates how make a Google Maps Geolocation REST API request.

Download Excel Class Modules

Chilkat Excel Class Modules

'  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.

Dim rest As Chilkat.Rest
Set rest = Chilkat.NewRest

'  Connect to the Google API REST server.
Dim bTls As Boolean
bTls = True
Dim port As Long
port = 443
Dim bAutoReconnect As Boolean
bAutoReconnect = True
Dim success As Boolean
success = rest.Connect("www.googleapis.com",port,bTls,bAutoReconnect)

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

'  Add your API key as a query parameter
success = 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
'    }
'   ]
'  }

Dim json As Chilkat.JsonObject
Set json = Chilkat.NewJsonObject
success = json.AppendInt("homeMobileCountryCode",310)
success = json.AppendInt("homeMobileNetworkCode",260)
success = json.AppendString("radioType","gsm")
success = json.AppendString("carrier","T-Mobile")
Dim aCellTowers As Chilkat.JsonArray
Set aCellTowers = json.AppendArray("cellTowers")
success = aCellTowers.AddObjectAt(0)
Dim oCellTower As Chilkat.JsonObject
Set oCellTower = aCellTowers.ObjectAt(0)
success = oCellTower.AppendInt("cellId",39627456)
success = oCellTower.AppendInt("locationAreaCode",40495)
success = oCellTower.AppendInt("mobileCountryCode",310)
success = oCellTower.AppendInt("mobileNetworkCode",260)
success = oCellTower.AppendInt("age",0)
success = oCellTower.AppendInt("signalStrength",-95)

Dim aWifi As Chilkat.JsonArray
Set aWifi = json.AppendArray("wifiAccessPoints")
success = aWifi.AddObjectAt(0)
Dim oPoint As Chilkat.JsonObject
Set oPoint = aWifi.ObjectAt(0)
success = oPoint.AppendString("macAddress","01:23:45:67:89:AB")
success = oPoint.AppendInt("signalStrength",8)
success = oPoint.AppendInt("age",0)
success = oPoint.AppendInt("signalToNoiseRatio",-65)
success = oPoint.AppendInt("channel",8)

success = aWifi.AddObjectAt(1)
Set oPoint = aWifi.ObjectAt(1)
success = oPoint.AppendString("macAddress","01:23:45:67:89:AC")
success = oPoint.AppendInt("signalStrength",4)
success = oPoint.AppendInt("age",0)

Dim responseJson As String
responseJson = rest.FullRequestString("POST","/geolocation/v1/geolocate",json.Emit())
If (rest.LastMethodSuccess <> True) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

'  When successful, the response code is 200.
If (rest.ResponseStatusCode <> 200) Then
    '  Examine the request/response to see what happened.
    Debug.Print "response status code = "; rest.ResponseStatusCode
    Debug.Print "response status text = "; rest.ResponseStatusText
    Debug.Print "response header: "; rest.ResponseHeader
    Debug.Print "response JSON: "; responseJson
    Debug.Print "---"
    Debug.Print "LastRequestStartLine: "; rest.LastRequestStartLine
    Debug.Print "LastRequestHeader: "; rest.LastRequestHeader
    Exit Sub
End If

json.EmitCompact = False
Debug.Print "JSON request body: "; json.Emit()

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

Debug.Print "JSON response: "; responseJson

Dim jsonResp As Chilkat.JsonObject
Set jsonResp = Chilkat.NewJsonObject
success = jsonResp.Load(responseJson)

Dim jsonLoc As Chilkat.JsonObject
Set jsonLoc = jsonResp.ObjectOf("location")
'  Any JSON value can be obtained as a string..
Dim latitude As String
latitude = jsonLoc.StringOf("lat")
Debug.Print "latitude = "; latitude
Dim longitude As String
longitude = jsonLoc.StringOf("lng")
Debug.Print "longitude = "; longitude

Dim accuracy As String
accuracy = jsonResp.StringOf("accuracy")
Debug.Print "accuracy = "; accuracy

 

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