/// <summary>
/// Sets data into cache.
/// </summary>
/// <typeparam name="T">type of data being stored.</typeparam>
/// <param name="key">key to store the data under.</param>
/// <param name="data">date to store.</param>
private void SetCacheEntry <T>(string key, EveServiceResponse <T> data) where T : class
{
_cache.Add(key, data, data.CacheUntil);
}
private EveServiceResponse <T> ProcessServiceResponse <T>(Task <HttpResponseMessage> webTask, string cacheKey,
int defaultCacheSeconds, Func <XElement, T> parseXml)
where T : class
{
Exception faultError = null;
T result = default(T);
DateTimeOffset cacheTime = DateTimeOffset.Now.AddSeconds(defaultCacheSeconds);
int eveErrorCode = 0;
string eveErrorText = string.Empty;
if (webTask.Exception != null)
{
faultError = webTask.Exception;
Trace.TraceWarning(faultError.FormatException());
}
if (faultError == null)
{
try
{
// Get the xml from the response.
XDocument xml = GetXmlFromResponse(webTask.Result);
XElement resultsElement;
if (xml != null && xml.Root != null && (resultsElement = xml.Root.Element(Result)) != null)
{
// using LINQ convert the XML into the collection of characters.
result = parseXml(resultsElement);
cacheTime = GetCacheExpiryFromResponse(xml.Root, defaultCacheSeconds);
}
else if (xml != null && xml.Root != null && (resultsElement = xml.Root.Element(Error)) != null)
{
// CCP server side error
eveErrorCode = GetErrorCodeFromResponse(resultsElement, ref eveErrorText);
// because cacheTime in the response is bugged (per http://wiki.eve-id.net/APIv2_Eve_ErrorList_XML ),
// defaulting cacheTime for 1 hour
cacheTime = DateTimeOffset.Now.AddHours(1);
}
else
{
// shenanigans.
eveErrorCode = 999999;
eveErrorText = "Unknown Error.";
}
}
catch (Exception e)
{
// catch any of the xml processing errors
faultError = e;
}
}
// store it.
var eveResult = new EveServiceResponse <T>
{
ResultData = result,
ServiceException = faultError,
IsSuccessfulHttpStatus = faultError == null && webTask.Result.IsSuccessStatusCode,
HttpStatusCode = faultError == null ? webTask.Result.StatusCode : HttpStatusCode.NotFound,
CacheUntil = cacheTime,
EveErrorCode = eveErrorCode,
EveErrorText = eveErrorText
};
if (faultError == null)
{
// cache it
SetCacheEntry(cacheKey, eveResult);
}
return(eveResult);
}