private const int UserAgentsCacheTimeout = 60; //user agents cache expire time.(minutes)
/// <summary>
/// Returns ClientCapability based on HttpRequest
/// </summary>
public override IClientCapability GetClientCapability(string userAgent)
{
DeviceInfoClientCapability deviceInfoClientCapability = null;
if (!string.IsNullOrEmpty(userAgent))
{
bool found = false;
//try to get content from cache
var cachedUserAgents = DataCache.GetCache <SharedDictionary <string, DeviceInfoClientCapability> >(UserAgentsCacheKey);
if (cachedUserAgents != null)
{
using (cachedUserAgents.GetReadLock())
{
if (cachedUserAgents.ContainsKey(userAgent))
{
deviceInfoClientCapability = cachedUserAgents[userAgent];
found = true;
}
}
}
if (!found)
{
var deviceInfo = WurflProvider.GetDeviceInfo(userAgent);
if (deviceInfo != null)
{
deviceInfoClientCapability = new DeviceInfoClientCapability(deviceInfo);
//update cache content
if (cachedUserAgents == null)
{
cachedUserAgents = new SharedDictionary <string, DeviceInfoClientCapability>();
}
using (cachedUserAgents.GetWriteLock())
{
cachedUserAgents[userAgent] = deviceInfoClientCapability;
}
DataCache.SetCache(UserAgentsCacheKey, cachedUserAgents, TimeSpan.FromMinutes(UserAgentsCacheTimeout));
}
}
}
var wurflClientCapability = new WURFLClientCapability(deviceInfoClientCapability);
wurflClientCapability.UserAgent = userAgent;
return(wurflClientCapability);
}
private static IQueryable <DeviceInfoClientCapability> GetAllDevicesCallBack(CacheItemArgs cacheItem)
{
var devices = new List <DeviceInfoClientCapability>();
var allDevicesField = WurflProvider.GetType().GetField("AllDevices", BindingFlags.Instance | BindingFlags.NonPublic);
var devicesInProvider = allDevicesField.GetValue(WurflProvider) as IDictionary <int, BaseDeviceInfo>;
foreach (var device in devicesInProvider.Values)
{
if (!string.IsNullOrEmpty(device.UserAgent))
{
devices.Add(new DeviceInfoClientCapability(device as DeviceInfo));
}
}
_allDevices = devices.AsQueryable();
return(_allDevices);
}
