C

Google Maps Geolocation Request

See more REST Examples

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

#include <C_CkRest.h>
#include <C_CkJsonObject.h>
#include <C_CkJsonArray.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkJsonObject json;
    HCkJsonArray aCellTowers;
    HCkJsonObject oCellTower;
    HCkJsonArray aWifi;
    HCkJsonObject oPoint;
    const char *responseJson;
    HCkJsonObject jsonResp;
    HCkJsonObject jsonLoc;
    const char *latitude;
    const char *longitude;
    const char *accuracy;

    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.

    rest = CkRest_Create();

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

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

    // Add your API key as a query parameter
    CkRest_AddQueryParam(rest,"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
    //   }
    //  ]
    // }

    json = CkJsonObject_Create();
    CkJsonObject_AppendInt(json,"homeMobileCountryCode",310);
    CkJsonObject_AppendInt(json,"homeMobileNetworkCode",260);
    CkJsonObject_AppendString(json,"radioType","gsm");
    CkJsonObject_AppendString(json,"carrier","T-Mobile");

    aCellTowers = CkJsonArray_Create();
    CkJsonObject_AppendArray2(json,"cellTowers",aCellTowers);

    oCellTower = CkJsonObject_Create();
    CkJsonArray_AddObjectAt2(aCellTowers,0,oCellTower);
    CkJsonObject_AppendInt(oCellTower,"cellId",39627456);
    CkJsonObject_AppendInt(oCellTower,"locationAreaCode",40495);
    CkJsonObject_AppendInt(oCellTower,"mobileCountryCode",310);
    CkJsonObject_AppendInt(oCellTower,"mobileNetworkCode",260);
    CkJsonObject_AppendInt(oCellTower,"age",0);
    CkJsonObject_AppendInt(oCellTower,"signalStrength",-95);

    aWifi = CkJsonArray_Create();
    CkJsonObject_AppendArray2(json,"wifiAccessPoints",aWifi);

    oPoint = CkJsonObject_Create();
    CkJsonArray_AddObjectAt2(aWifi,0,oPoint);
    CkJsonObject_AppendString(oPoint,"macAddress","01:23:45:67:89:AB");
    CkJsonObject_AppendInt(oPoint,"signalStrength",8);
    CkJsonObject_AppendInt(oPoint,"age",0);
    CkJsonObject_AppendInt(oPoint,"signalToNoiseRatio",-65);
    CkJsonObject_AppendInt(oPoint,"channel",8);

    CkJsonArray_AddObjectAt2(aWifi,1,oPoint);
    CkJsonObject_AppendString(oPoint,"macAddress","01:23:45:67:89:AC");
    CkJsonObject_AppendInt(oPoint,"signalStrength",4);
    CkJsonObject_AppendInt(oPoint,"age",0);

    responseJson = CkRest_fullRequestString(rest,"POST","/geolocation/v1/geolocate",CkJsonObject_emit(json));
    if (CkRest_getLastMethodSuccess(rest) == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        CkJsonArray_Dispose(aCellTowers);
        CkJsonObject_Dispose(oCellTower);
        CkJsonArray_Dispose(aWifi);
        CkJsonObject_Dispose(oPoint);
        return;
    }

    // When successful, the response code is 200.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        // Examine the request/response to see what happened.
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response JSON: %s\n",responseJson);
        printf("---\n");
        printf("LastRequestStartLine: %s\n",CkRest_lastRequestStartLine(rest));
        printf("LastRequestHeader: %s\n",CkRest_lastRequestHeader(rest));
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        CkJsonArray_Dispose(aCellTowers);
        CkJsonObject_Dispose(oCellTower);
        CkJsonArray_Dispose(aWifi);
        CkJsonObject_Dispose(oPoint);
        return;
    }

    CkJsonObject_putEmitCompact(json,FALSE);
    printf("JSON request body: %s\n",CkJsonObject_emit(json));

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

    printf("JSON response: %s\n",responseJson);

    jsonResp = CkJsonObject_Create();
    CkJsonObject_Load(jsonResp,responseJson);

    jsonLoc = CkJsonObject_Create();
    CkJsonObject_ObjectOf2(jsonResp,"location",jsonLoc);

    // Any JSON value can be obtained as a string..
    latitude = CkJsonObject_stringOf(jsonLoc,"lat");
    printf("latitude = %s\n",latitude);
    longitude = CkJsonObject_stringOf(jsonLoc,"lng");
    printf("longitude = %s\n",longitude);

    accuracy = CkJsonObject_stringOf(jsonResp,"accuracy");
    printf("accuracy = %s\n",accuracy);


    CkRest_Dispose(rest);
    CkJsonObject_Dispose(json);
    CkJsonArray_Dispose(aCellTowers);
    CkJsonObject_Dispose(oCellTower);
    CkJsonArray_Dispose(aWifi);
    CkJsonObject_Dispose(oPoint);
    CkJsonObject_Dispose(jsonResp);
    CkJsonObject_Dispose(jsonLoc);

    }