private void OnResultsFilterResponse(WebResponse webRes, object response, string httpMethod, string requestUri, object request)
{
existingResultsFilterResponse?.Invoke(webRes, response, httpMethod, requestUri, request);
if (httpMethod != HttpMethods.Get || response == null || webRes == null)
{
return;
}
var eTag = webRes.Headers[HttpHeaders.ETag];
var lastModifiedStr = webRes.Headers[HttpHeaders.LastModified];
if (eTag == null && lastModifiedStr == null)
{
return;
}
var entry = new HttpCacheEntry(response)
{
ETag = eTag,
ContentLength = webRes.ContentLength >= 0 ? webRes.ContentLength : (long?)null,
};
if (lastModifiedStr != null)
{
DateTime lastModified;
if (DateTime.TryParse(lastModifiedStr, new DateTimeFormatInfo(), DateTimeStyles.RoundtripKind, out lastModified))
{
entry.LastModified = lastModified.ToUniversalTime();
}
}
long secs;
var ageStr = webRes.Headers[HttpHeaders.Age];
if (ageStr != null && long.TryParse(ageStr, out secs))
{
entry.Age = TimeSpan.FromSeconds(secs);
}
var cacheControl = webRes.Headers[HttpHeaders.CacheControl];
if (cacheControl != null)
{
var parts = cacheControl.Split(',');
foreach (var part in parts)
{
var kvp = part.Split('=');
var key = kvp[0].Trim().ToLower();
switch (key)
{
case "max-age":
if (kvp.Length == 2 && long.TryParse(kvp[1], out secs))
{
entry.MaxAge = TimeSpan.FromSeconds(secs);
}
break;
case "must-revalidate":
entry.MustRevalidate = true;
break;
case "no-cache":
entry.NoCache = true;
break;
}
}
entry.SetMaxAge(entry.MaxAge);
cache[requestUri] = entry;
Interlocked.Increment(ref cachesAdded);
var runCleanupAfterEvery = CleanCachesWhenCountExceeds;
if (cachesAdded % runCleanupAfterEvery == 0 &&
cache.Count > CleanCachesWhenCountExceeds)
{
if (ClearExpiredCachesOlderThan != null)
{
RemoveExpiredCachesOlderThan(ClearExpiredCachesOlderThan.Value);
}
if (ClearCachesOlderThan != null)
{
RemoveCachesOlderThan(ClearCachesOlderThan.Value);
}
}
}
}
private void OnResultsFilterResponse(HttpResponseMessage webRes, object response, string httpMethod, string requestUri, object request)
{
if (existingResultsFilterResponse != null)
{
existingResultsFilterResponse(webRes, response, httpMethod, requestUri, request);
}
if (httpMethod != HttpMethods.Get || response == null || webRes == null)
{
return;
}
var eTag = webRes.Headers.ETag?.Tag;
if (eTag == null && webRes.Content.Headers.LastModified == null)
{
return;
}
var entry = new HttpCacheEntry(response)
{
ETag = eTag,
ContentLength = webRes.Content.Headers.ContentLength
};
if (webRes.Content.Headers.LastModified != null)
{
entry.LastModified = webRes.Content.Headers.LastModified.Value.UtcDateTime;
}
entry.Age = webRes.Headers.Age;
var cacheControl = webRes.Headers.CacheControl;
if (cacheControl != null)
{
if (cacheControl.MaxAge != null)
{
entry.MaxAge = cacheControl.MaxAge.Value;
}
entry.MustRevalidate = cacheControl.MustRevalidate;
entry.NoCache = cacheControl.NoCache;
entry.SetMaxAge(entry.MaxAge);
cache[requestUri] = entry;
Interlocked.Increment(ref cachesAdded);
var runCleanupAfterEvery = CleanCachesWhenCountExceeds;
if (cachesAdded % runCleanupAfterEvery == 0 &&
cache.Count > CleanCachesWhenCountExceeds)
{
if (ClearExpiredCachesOlderThan != null)
{
RemoveExpiredCachesOlderThan(ClearExpiredCachesOlderThan.Value);
}
if (ClearCachesOlderThan != null)
{
RemoveCachesOlderThan(ClearCachesOlderThan.Value);
}
}
}
}
