void DataReceived(BUrlRequest* request, const char* data,
off_t position, ssize_t size)
{
if (request != fRequest)
delete request;
BHttpRequest* httpReq = dynamic_cast<BHttpRequest*>(request);
if (httpReq != NULL) {
const BHttpResult& httpRes
= (const BHttpResult&)httpReq->Result();
int32 status = httpRes.StatusCode();
if (BHttpRequest::IsClientErrorStatusCode(status)
|| BHttpRequest::IsServerErrorStatusCode(status)) {
fRunning = false;
} else if (BHttpRequest::IsRedirectionStatusCode(status))
return;
}
_ReleaseInit();
fInputAdapter->Write(data, size);
}
status_t
BGeolocation::LocateSelf(float& latitude, float& longitude)
{
// Enumerate wifi network and build JSON message
BNetworkRoster& roster = BNetworkRoster::Default();
uint32 interfaceCookie = 0;
BNetworkInterface interface;
BString query("{\n\t\"wifiAccessPoints\": [");
int32 count = 0;
while (roster.GetNextInterface(&interfaceCookie, interface) == B_OK) {
uint32 networkCookie = 0;
wireless_network network;
BNetworkDevice device(interface.Name());
// TODO is that the correct way to enumerate devices?
while (device.GetNextNetwork(networkCookie, network) == B_OK) {
if (count != 0)
query += ',';
count++;
query += "\n\t\t{ \"macAddress\": \"";
query += network.address.ToString().ToUpper();
query += "\", \"signalStrength\": ";
query << (int)network.signal_strength;
query += ", \"signalToNoiseRatio\": ";
query << (int)network.noise_level;
query += " }";
}
}
query += "\n\t]\n}\n";
// Check that we have enough data (we need at least 2 networks)
if (count < 2)
return B_DEVICE_NOT_FOUND;
class GeolocationListener: public BUrlProtocolListener
{
public:
virtual ~GeolocationListener() {};
void DataReceived(BUrlRequest*, const char* data, off_t position,
ssize_t size) {
result.WriteAt(position, data, size);
}
BMallocIO result;
};
GeolocationListener listener;
// Send Request (POST JSON message)
BUrlRequest* request = BUrlProtocolRoster::MakeRequest(fService, &listener);
if (request == NULL)
return B_BAD_DATA;
BHttpRequest* http = dynamic_cast<BHttpRequest*>(request);
if (http == NULL) {
delete request;
return B_BAD_DATA;
}
http->SetMethod(B_HTTP_POST);
BMemoryIO* io = new BMemoryIO(query.String(), query.Length());
http->AdoptInputData(io, query.Length());
status_t result = http->Run();
if (result < 0) {
delete http;
return result;
}
while (http->IsRunning())
snooze(10000);
// Parse reply
const BHttpResult& reply = (const BHttpResult&)http->Result();
if (reply.StatusCode() != 200) {
delete http;
return B_ERROR;
}
BMessage data;
result = BJson::Parse(data, (char*)listener.result.Buffer());
delete http;
if (result != B_OK) {
return result;
}
BMessage location;
result = data.FindMessage("location", &location);
if (result != B_OK)
return result;
double lat, lon;
result = location.FindDouble("lat", &lat);
if (result == B_OK)
result = location.FindDouble("lng", &lon);
latitude = lat;
longitude = lon;
return result;
}