public override ICacheItem Read(Stream inputStream)
{
string s = UtilityMethods.ReadString(inputStream);
string response = UtilityMethods.ReadString(inputStream);
string[] chunks = s.Split('\n');
// Corrupted cache record, so throw IOException which is then handled and returns partial cache.
if (chunks.Length != 2)
{
throw new IOException("Unexpected number of chunks found");
}
string url = chunks[0];
var creationTime = new DateTime(long.Parse(chunks[1], System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo));
var item = new ResponseCacheItem(new Uri(url), response, creationTime);
return(item);
}
private T GetResponse <T>(Dictionary <string, string> parameters, TimeSpan cacheTimeout) where T : ITwentyThreeParsable, new()
{
// Flow for GetResponse.
// 1. Check API Key
// 2. Calculate Cache URL.
// 3. Check Cache for URL.
// 4. Get Response if not in cache.
// 5. Write Cache.
// 6. Parse Response.
CheckApiKey();
parameters["api_key"] = ApiKey;
// If performing one of the old 'flickr.auth' methods then use old authentication details.
var method = parameters["method"];
if (!string.IsNullOrEmpty(AuthToken))
{
parameters["auth_token"] = AuthToken;
}
var url = CalculateUri(parameters, !string.IsNullOrEmpty(sharedSecret));
lastRequest = url;
string responseXml;
if (InstanceCacheDisabled)
{
responseXml = TwentyThreeResponder.GetDataResponse(this, BaseUri.AbsoluteUri, parameters);
}
else
{
var urlComplete = url;
var cached = (ResponseCacheItem)Cache.Responses.Get(urlComplete, cacheTimeout, true);
if (cached != null)
{
Debug.WriteLine("Cache hit.");
responseXml = cached.Response;
}
else
{
Debug.WriteLine("Cache miss.");
responseXml = TwentyThreeResponder.GetDataResponse(this, BaseUri.AbsoluteUri, parameters);
var resCache = new ResponseCacheItem(new Uri(urlComplete), responseXml, DateTime.UtcNow);
Cache.Responses.Shrink(Math.Max(0, Cache.CacheSizeLimit - responseXml.Length));
Cache.Responses[urlComplete] = resCache;
}
}
lastResponse = responseXml;
var item = new T();
item.Load(responseXml);
return(item);
}
