// only used by internal cache
private static void EntryRemovedCallback(string key, object value, CacheItemRemovedReason reason)
{
Debug.Trace("OutputCache", "EntryRemovedCallback: reason=" + reason + ", key=" + key);
DecrementCount();
PerfCounters.DecrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
CachedRawResponse cachedRawResponse = value as CachedRawResponse;
if (cachedRawResponse != null)
{
String kernelCacheUrl = cachedRawResponse._kernelCacheUrl;
// if it is kernel cached, the url will be non-null.
// if the entry was re-inserted, don't remove kernel entry since it will be updated
if (kernelCacheUrl != null && HttpRuntime.CacheInternal.Get(key) == null)
{
// invalidate kernel cache entry
if (HttpRuntime.UseIntegratedPipeline)
{
UnsafeIISMethods.MgdFlushKernelCache(kernelCacheUrl);
}
else
{
UnsafeNativeMethods.InvalidateKernelCache(kernelCacheUrl);
}
}
}
}
private static OutputCacheEntry Convert(CachedRawResponse cachedRawResponse, string depKey, string[] fileDependencies)
{
List <HeaderElement> headerElements = null;
ArrayList headers = cachedRawResponse._rawResponse.Headers;
int count = (headers != null) ? headers.Count : 0;
for (int i = 0; i < count; i++)
{
if (headerElements == null)
{
headerElements = new List <HeaderElement>(count);
}
HttpResponseHeader h = (HttpResponseHeader)(headers[i]);
headerElements.Add(new HeaderElement(h.Name, h.Value));
}
List <ResponseElement> responseElements = null;
ArrayList buffers = cachedRawResponse._rawResponse.Buffers;
count = (buffers != null) ? buffers.Count : 0;
for (int i = 0; i < count; i++)
{
if (responseElements == null)
{
responseElements = new List <ResponseElement>(count);
}
IHttpResponseElement elem = buffers[i] as IHttpResponseElement;
if (elem is HttpFileResponseElement)
{
HttpFileResponseElement fileElement = elem as HttpFileResponseElement;
responseElements.Add(new FileResponseElement(fileElement.FileName, fileElement.Offset, elem.GetSize()));
}
else if (elem is HttpSubstBlockResponseElement)
{
HttpSubstBlockResponseElement substElement = elem as HttpSubstBlockResponseElement;
responseElements.Add(new SubstitutionResponseElement(substElement.Callback));
}
else
{
byte[] b = elem.GetBytes();
long length = (b != null) ? b.Length : 0;
responseElements.Add(new MemoryResponseElement(b, length));
}
}
OutputCacheEntry oce = new OutputCacheEntry(
cachedRawResponse._cachedVaryId,
cachedRawResponse._settings,
cachedRawResponse._kernelCacheUrl,
depKey,
fileDependencies,
cachedRawResponse._rawResponse.StatusCode,
cachedRawResponse._rawResponse.StatusDescription,
headerElements,
responseElements
);
return(oce);
}
static void OnRawResponseRemoved(string key, object value, CacheItemRemovedReason reason)
{
CachedRawResponse c = (CachedRawResponse)value;
c.VaryBy.ItemList.Remove(key);
if (c.VaryBy.ItemList.Count != 0)
{
return;
}
HttpRuntime.Cache.Remove(c.VaryBy.Key);
}
private static OutputCacheEntry Convert(CachedRawResponse cachedRawResponse, string depKey, string[] fileDependencies)
{
List <HeaderElement> headerElements = null;
ArrayList headers = cachedRawResponse._rawResponse.Headers;
int capacity = (headers != null) ? headers.Count : 0;
for (int i = 0; i < capacity; i++)
{
if (headerElements == null)
{
headerElements = new List <HeaderElement>(capacity);
}
HttpResponseHeader header = (HttpResponseHeader)headers[i];
headerElements.Add(new HeaderElement(header.Name, header.Value));
}
List <ResponseElement> responseElements = null;
ArrayList buffers = cachedRawResponse._rawResponse.Buffers;
capacity = (buffers != null) ? buffers.Count : 0;
for (int j = 0; j < capacity; j++)
{
if (responseElements == null)
{
responseElements = new List <ResponseElement>(capacity);
}
IHttpResponseElement element = buffers[j] as IHttpResponseElement;
if (element is HttpFileResponseElement)
{
HttpFileResponseElement element2 = element as HttpFileResponseElement;
responseElements.Add(new FileResponseElement(element2.FileName, element2.Offset, element.GetSize()));
}
else if (element is HttpSubstBlockResponseElement)
{
HttpSubstBlockResponseElement element3 = element as HttpSubstBlockResponseElement;
responseElements.Add(new SubstitutionResponseElement(element3.Callback));
}
else
{
byte[] bytes = element.GetBytes();
long length = (bytes != null) ? ((long)bytes.Length) : ((long)0);
responseElements.Add(new MemoryResponseElement(bytes, length));
}
}
return(new OutputCacheEntry(cachedRawResponse._cachedVaryId, cachedRawResponse._settings, cachedRawResponse._kernelCacheUrl, depKey, fileDependencies, cachedRawResponse._rawResponse.StatusCode, cachedRawResponse._rawResponse.StatusDescription, headerElements, responseElements));
}
void OnRawResponseRemoved(string key, object value, CacheItemRemovedReason reason)
{
CachedRawResponse c = value as CachedRawResponse;
CachedVaryBy varyby = c != null ? c.VaryBy : null;
if (varyby == null)
{
return;
}
List <string> itemList = varyby.ItemList;
OutputCacheProvider provider = FindCacheProvider(null);
itemList.Remove(key);
provider.Remove(key);
if (itemList.Count != 0)
{
return;
}
provider.Remove(varyby.Key);
}
private static void EntryRemovedCallback(string key, object value, CacheItemRemovedReason reason)
{
DecrementCount();
PerfCounters.DecrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
CachedRawResponse response = value as CachedRawResponse;
if (response != null)
{
string cacheKey = response._kernelCacheUrl;
if ((cacheKey != null) && (HttpRuntime.CacheInternal.Get(key) == null))
{
if (HttpRuntime.UseIntegratedPipeline)
{
UnsafeIISMethods.MgdFlushKernelCache(cacheKey);
}
else
{
System.Web.UnsafeNativeMethods.InvalidateKernelCache(cacheKey);
}
}
}
}
// insert cached vary or output cache entry
internal static void InsertResponse(String cachedVaryKey, CachedVary cachedVary,
String rawResponseKey, CachedRawResponse rawResponse,
CacheDependency dependencies,
DateTime absExp, TimeSpan slidingExp)
{
// if the provider is undefined or the fragment can't be inserted in the
// provider, insert it in the internal cache.
OutputCacheProvider provider = GetProvider(HttpContext.Current);
//
// CachedVary can be serialized.
// CachedRawResponse is not always serializable.
//
bool useProvider = (provider != null);
if (useProvider)
{
bool canUseProvider = (IsSubstBlockSerializable(rawResponse._rawResponse) &&
rawResponse._settings.IsValidationCallbackSerializable() &&
slidingExp == Cache.NoSlidingExpiration &&
(dependencies == null || dependencies.IsFileDependency()));
if (useProvider && !canUseProvider)
{
throw new ProviderException(SR.GetString(SR.Provider_does_not_support_policy_for_responses, provider.Name));
}
}
#if DBG
bool cachedVaryPutInCache = (cachedVary != null);
#endif
if (cachedVary != null)
{
/*
* Add the CachedVary item so that a request will know
* which headers are needed to issue another request.
*
* Use the Add method so that we guarantee we only use
* a single CachedVary and don't overwrite existing ones.
*/
CachedVary cachedVaryInCache;
if (!useProvider)
{
cachedVaryInCache = OutputCache.UtcAdd(cachedVaryKey, cachedVary);
}
else
{
cachedVaryInCache = (CachedVary)provider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (cachedVaryInCache != null)
{
if (!cachedVary.Equals(cachedVaryInCache))
{
if (!useProvider)
{
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else
{
provider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else
{
cachedVary = cachedVaryInCache;
#if DBG
cachedVaryPutInCache = false;
#endif
}
}
if (!useProvider)
{
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
// not all caches support cache key dependencies, but we can use a "change number" to associate
// the ControlCachedVary and the PartialCachingCacheEntry
rawResponse._cachedVaryId = cachedVary.CachedVaryId;
}
// Now insert into the cache (use cache provider if possible, otherwise use internal cache)
if (!useProvider)
{
HttpRuntime.CacheInternal.UtcInsert(rawResponseKey, rawResponse,
dependencies,
absExp, slidingExp,
CacheItemPriority.Normal,
s_entryRemovedCallback);
IncrementCount();
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
}
else
{
string depKey = null;
string[] fileDeps = null;
if (dependencies != null)
{
depKey = OUTPUTCACHE_KEYPREFIX_DEPENDENCIES + dependencies.GetUniqueID();
fileDeps = dependencies.GetFileDependencies();
}
OutputCacheEntry oce = Convert(rawResponse, depKey, fileDeps);
provider.Set(rawResponseKey, oce, absExp);
if (dependencies != null)
{
// use Add and dispose dependencies if there's already one in the cache
Object d = HttpRuntime.CacheInternal.UtcAdd(depKey, new DependencyCacheEntry(rawResponseKey, oce.KernelCacheUrl, provider.Name),
dependencies,
absExp, Cache.NoSlidingExpiration,
CacheItemPriority.Normal, s_dependencyRemovedCallback);
if (d != null)
{
dependencies.Dispose();
}
}
}
#if DBG
string cachedVaryType = (cachedVaryPutInCache) ? "CachedVary" : "";
string providerUsed = (useProvider) ? provider.Name : "CacheInternal";
Debug.Trace("OutputCache", "InsertResposne("
+ cachedVaryKey + ", "
+ cachedVaryType + ", "
+ rawResponseKey + ", CachedRawResponse, ...) -->"
+ providerUsed);
#endif
}
private static OutputCacheEntry Convert(CachedRawResponse cachedRawResponse, string depKey, string[] fileDependencies)
{
List<HeaderElement> headerElements = null;
ArrayList headers = cachedRawResponse._rawResponse.Headers;
int capacity = (headers != null) ? headers.Count : 0;
for (int i = 0; i < capacity; i++)
{
if (headerElements == null)
{
headerElements = new List<HeaderElement>(capacity);
}
HttpResponseHeader header = (HttpResponseHeader) headers[i];
headerElements.Add(new HeaderElement(header.Name, header.Value));
}
List<ResponseElement> responseElements = null;
ArrayList buffers = cachedRawResponse._rawResponse.Buffers;
capacity = (buffers != null) ? buffers.Count : 0;
for (int j = 0; j < capacity; j++)
{
if (responseElements == null)
{
responseElements = new List<ResponseElement>(capacity);
}
IHttpResponseElement element = buffers[j] as IHttpResponseElement;
if (element is HttpFileResponseElement)
{
HttpFileResponseElement element2 = element as HttpFileResponseElement;
responseElements.Add(new FileResponseElement(element2.FileName, element2.Offset, element.GetSize()));
}
else if (element is HttpSubstBlockResponseElement)
{
HttpSubstBlockResponseElement element3 = element as HttpSubstBlockResponseElement;
responseElements.Add(new SubstitutionResponseElement(element3.Callback));
}
else
{
byte[] bytes = element.GetBytes();
long length = (bytes != null) ? ((long) bytes.Length) : ((long) 0);
responseElements.Add(new MemoryResponseElement(bytes, length));
}
}
return new OutputCacheEntry(cachedRawResponse._cachedVaryId, cachedRawResponse._settings, cachedRawResponse._kernelCacheUrl, depKey, fileDependencies, cachedRawResponse._rawResponse.StatusCode, cachedRawResponse._rawResponse.StatusDescription, headerElements, responseElements);
}
private static CachedRawResponse Convert(OutputCacheEntry oce)
{
ArrayList headers = null;
if (oce.HeaderElements != null && oce.HeaderElements.Count > 0)
{
headers = new ArrayList(oce.HeaderElements.Count);
for (int i = 0; i < oce.HeaderElements.Count; i++)
{
HttpResponseHeader h = new HttpResponseHeader(oce.HeaderElements[i].Name, oce.HeaderElements[i].Value);
headers.Add(h);
}
}
ArrayList buffers = null;
if (oce.ResponseElements != null && oce.ResponseElements.Count > 0)
{
buffers = new ArrayList(oce.ResponseElements.Count);
for (int i = 0; i < oce.ResponseElements.Count; i++)
{
ResponseElement re = oce.ResponseElements[i];
IHttpResponseElement elem = null;
if (re is FileResponseElement)
{
HttpContext context = HttpContext.Current;
HttpWorkerRequest wr = (context != null) ? context.WorkerRequest : null;
bool supportsLongTransmitFile = (wr != null && wr.SupportsLongTransmitFile);
bool isImpersonating = ((context != null && context.IsClientImpersonationConfigured) || HttpRuntime.IsOnUNCShareInternal);
FileResponseElement fre = (FileResponseElement)re;
// DevDiv #21203: Need to verify permission to access the requested file since handled by native code.
HttpRuntime.CheckFilePermission(fre.Path);
elem = new HttpFileResponseElement(fre.Path, fre.Offset, fre.Length, isImpersonating, supportsLongTransmitFile);
}
else if (re is MemoryResponseElement)
{
MemoryResponseElement mre = (MemoryResponseElement)re;
int size = System.Convert.ToInt32(mre.Length);
elem = new HttpResponseBufferElement(mre.Buffer, size);
}
else if (re is SubstitutionResponseElement)
{
SubstitutionResponseElement sre = (SubstitutionResponseElement)re;
elem = new HttpSubstBlockResponseElement(sre.Callback);
}
else
{
throw new NotSupportedException();
}
buffers.Add(elem);
}
}
else
{
buffers = new ArrayList();
}
HttpRawResponse rawResponse = new HttpRawResponse(oce.StatusCode, oce.StatusDescription, headers, buffers, false /*hasSubstBlocks*/);
CachedRawResponse cachedRawResponse = new CachedRawResponse(rawResponse, oce.Settings, oce.KernelCacheUrl, oce.CachedVaryId);
return(cachedRawResponse);
}
internal static void InsertResponse(string cachedVaryKey, CachedVary cachedVary, string rawResponseKey, CachedRawResponse rawResponse, CacheDependency dependencies, DateTime absExp, TimeSpan slidingExp)
{
OutputCacheProvider provider = GetProvider(HttpContext.Current);
bool flag = provider != null;
if (flag)
{
bool flag2 = ((IsSubstBlockSerializable(rawResponse._rawResponse) && rawResponse._settings.IsValidationCallbackSerializable()) && (slidingExp == Cache.NoSlidingExpiration)) && ((dependencies == null) || dependencies.IsFileDependency());
if (flag && !flag2)
{
throw new ProviderException(System.Web.SR.GetString("Provider_does_not_support_policy_for_responses", new object[] { provider.Name }));
}
}
if (cachedVary != null)
{
CachedVary vary;
if (!flag)
{
vary = UtcAdd(cachedVaryKey, cachedVary);
}
else
{
vary = (CachedVary) provider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (vary != null)
{
if (!cachedVary.Equals(vary))
{
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else
{
provider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else
{
cachedVary = vary;
}
}
if (!flag)
{
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
rawResponse._cachedVaryId = cachedVary.CachedVaryId;
}
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(rawResponseKey, rawResponse, dependencies, absExp, slidingExp, CacheItemPriority.Normal, s_entryRemovedCallback);
IncrementCount();
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
}
else
{
string depKey = null;
string[] fileDependencies = null;
if (dependencies != null)
{
depKey = "aD" + dependencies.GetUniqueID();
fileDependencies = dependencies.GetFileDependencies();
}
OutputCacheEntry entry = Convert(rawResponse, depKey, fileDependencies);
provider.Set(rawResponseKey, entry, absExp);
if ((dependencies != null) && (HttpRuntime.CacheInternal.UtcAdd(depKey, new DependencyCacheEntry(rawResponseKey, entry.KernelCacheUrl, provider.Name), dependencies, absExp, Cache.NoSlidingExpiration, CacheItemPriority.Normal, s_dependencyRemovedCallback) != null))
{
dependencies.Dispose();
}
}
}
internal static void InsertResponse(string cachedVaryKey, CachedVary cachedVary, string rawResponseKey, CachedRawResponse rawResponse, CacheDependency dependencies, DateTime absExp, TimeSpan slidingExp)
{
OutputCacheProvider provider = GetProvider(HttpContext.Current);
bool flag = provider != null;
if (flag)
{
bool flag2 = ((IsSubstBlockSerializable(rawResponse._rawResponse) && rawResponse._settings.IsValidationCallbackSerializable()) && (slidingExp == Cache.NoSlidingExpiration)) && ((dependencies == null) || dependencies.IsFileDependency());
if (flag && !flag2)
{
throw new ProviderException(System.Web.SR.GetString("Provider_does_not_support_policy_for_responses", new object[] { provider.Name }));
}
}
if (cachedVary != null)
{
CachedVary vary;
if (!flag)
{
vary = UtcAdd(cachedVaryKey, cachedVary);
}
else
{
vary = (CachedVary)provider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (vary != null)
{
if (!cachedVary.Equals(vary))
{
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else
{
provider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else
{
cachedVary = vary;
}
}
if (!flag)
{
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
rawResponse._cachedVaryId = cachedVary.CachedVaryId;
}
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(rawResponseKey, rawResponse, dependencies, absExp, slidingExp, CacheItemPriority.Normal, s_entryRemovedCallback);
IncrementCount();
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
}
else
{
string depKey = null;
string[] fileDependencies = null;
if (dependencies != null)
{
depKey = "aD" + dependencies.GetUniqueID();
fileDependencies = dependencies.GetFileDependencies();
}
OutputCacheEntry entry = Convert(rawResponse, depKey, fileDependencies);
provider.Set(rawResponseKey, entry, absExp);
if ((dependencies != null) && (HttpRuntime.CacheInternal.UtcAdd(depKey, new DependencyCacheEntry(rawResponseKey, entry.KernelCacheUrl, provider.Name), dependencies, absExp, Cache.NoSlidingExpiration, CacheItemPriority.Normal, s_dependencyRemovedCallback) != null))
{
dependencies.Dispose();
}
}
}
/*
* If the item is cacheable, add it to the cache.
*/
/// <devdoc>
/// <para>Raises the <see langword='Leave'/> event, which causes any cacheable items to
/// be put into the output cache.</para>
/// </devdoc>
internal /*public*/ void OnLeave(Object source, EventArgs eventArgs) {
HttpApplication app;
HttpContext context;
bool cacheable;
CachedVary cachedVary;
HttpCachePolicy cache;
HttpCachePolicySettings settings;
string keyRawResponse;
string[] varyByContentEncodings;
string[] varyByHeaders;
string[] varyByParams;
bool varyByAllParams;
HttpRequest request;
HttpResponse response;
int i, n;
bool cacheAuthorizedPage;
Debug.Trace("OutputCacheModuleLeave", "Beginning OutputCacheModule::Leave");
app = (HttpApplication)source;
context = app.Context;
request = context.Request;
response = context.Response;
cache = null;
#if DBG
string reason = null;
#endif
/*
* Determine whether the response is cacheable.
*/
cacheable = false;
do {
if (!response.HasCachePolicy) {
#if DBG
reason = "CachePolicy not created, not modified from non-caching default.";
#endif
break;
}
cache = response.Cache;
if (!cache.IsModified()) {
#if DBG
reason = "CachePolicy created, but not modified from non-caching default.";
#endif
break;
}
if (response.StatusCode != 200) {
#if DBG
reason = "response.StatusCode != 200.";
#endif
break;
}
if (request.HttpVerb != HttpVerb.GET && request.HttpVerb != HttpVerb.POST) {
#if DBG
reason = "the cache can only cache responses to GET and POST.";
#endif
break;
}
if (!response.IsBuffered()) {
#if DBG
reason = "the response is not buffered.";
#endif
break;
}
/*
* Change a response with HttpCacheability.Public to HttpCacheability.Private
* if it requires authorization, and allow it to be cached.
*
* Note that setting Cacheability to ServerAndPrivate would accomplish
* the same thing without needing the "cacheAuthorizedPage" variable,
* but in RTM we did not have ServerAndPrivate, and setting that value
* would change the behavior.
*/
cacheAuthorizedPage = false;
if ( cache.GetCacheability() == HttpCacheability.Public &&
context.RequestRequiresAuthorization()) {
cache.SetCacheability(HttpCacheability.Private);
cacheAuthorizedPage = true;
}
if ( cache.GetCacheability() != HttpCacheability.Public &&
cache.GetCacheability() != HttpCacheability.ServerAndPrivate &&
cache.GetCacheability() != HttpCacheability.ServerAndNoCache &&
!cacheAuthorizedPage) {
#if DBG
reason = "CachePolicy.Cacheability is not Public, ServerAndPrivate, or ServerAndNoCache.";
#endif
break;
}
if (cache.GetNoServerCaching()) {
#if DBG
reason = "CachePolicy.NoServerCaching is set.";
#endif
break;
}
// MSRC 11855 (DevDiv 297240 / 362405) - We should suppress output caching for responses which contain non-shareable cookies.
// We already disable the HTTP.SYS and IIS user mode cache when *any* response cookie is present (see IIS7WorkerRequest.SendUnknownResponseHeader)
if (response.ContainsNonShareableCookies()) {
#if DBG
reason = "Non-shareable response cookies were present.";
#endif
break;
}
if (!cache.HasExpirationPolicy() && !cache.HasValidationPolicy()) {
#if DBG
reason = "CachePolicy has no expiration policy or validation policy.";
#endif
break;
}
if (cache.VaryByHeaders.GetVaryByUnspecifiedParameters()) {
#if DBG
reason = "CachePolicy.Vary.VaryByUnspecifiedParameters was called.";
#endif
break;
}
if (!cache.VaryByParams.AcceptsParams() && (request.HttpVerb == HttpVerb.POST || request.HasQueryString)) {
#if DBG
reason = "the cache cannot cache responses to POSTs or GETs with query strings unless Cache.VaryByParams is modified.";
#endif
break;
}
if (cache.VaryByContentEncodings.IsModified() && !cache.VaryByContentEncodings.IsCacheableEncoding(context.Response.GetHttpHeaderContentEncoding())) {
#if DBG
reason = "the cache cannot cache encoded responses that are not listed in the VaryByContentEncodings collection.";
#endif
break;
}
cacheable = true;
} while (false);
/*
* Add response to cache.
*/
if (!cacheable) {
#if DBG
Debug.Assert(reason != null, "reason != null");
Debug.Trace("OutputCacheModuleLeave", "Item is not output cacheable because " + reason +
"\n\tUrl=" + request.Path +
"\nReturning from OutputCacheModule::Leave");
#endif
return;
}
RecordCacheMiss();
settings = cache.GetCurrentSettings(response);
varyByContentEncodings = settings.VaryByContentEncodings;
varyByHeaders = settings.VaryByHeaders;
if (settings.IgnoreParams) {
varyByParams = null;
}
else {
varyByParams = settings.VaryByParams;
}
/* Create the key if it was not created in OnEnter */
if (_key == null) {
_key = CreateOutputCachedItemKey(context, null);
Debug.Assert(_key != null, "_key != null");
}
if (varyByContentEncodings == null && varyByHeaders == null && varyByParams == null && settings.VaryByCustom == null) {
/*
* This is not a varyBy item.
*/
keyRawResponse = _key;
cachedVary = null;
}
else {
/*
* There is a vary in the cache policy. We handle this
* by adding another item to the cache which contains
* a list of the vary headers. A request for the item
* without the vary headers in the key will return this
* item. From the headers another key can be constructed
* to lookup the item with the raw response.
*/
if (varyByHeaders != null) {
for (i = 0, n = varyByHeaders.Length; i < n; i++) {
varyByHeaders[i] = "HTTP_" + CultureInfo.InvariantCulture.TextInfo.ToUpper(
varyByHeaders[i].Replace('-', '_'));
}
}
varyByAllParams = false;
if (varyByParams != null) {
varyByAllParams = (varyByParams.Length == 1 && varyByParams[0] == ASTERISK);
if (varyByAllParams) {
varyByParams = null;
}
else {
for (i = 0, n = varyByParams.Length; i < n; i++) {
varyByParams[i] = CultureInfo.InvariantCulture.TextInfo.ToLower(varyByParams[i]);
}
}
}
cachedVary = new CachedVary(varyByContentEncodings, varyByHeaders, varyByParams, varyByAllParams, settings.VaryByCustom);
keyRawResponse = CreateOutputCachedItemKey(context, cachedVary);
if (keyRawResponse == null) {
Debug.Trace("OutputCacheModuleLeave", "Couldn't add non-cacheable post.\n\tkey=" + _key);
return;
}
// it is possible that the user code calculating custom vary-by
// string would Flush making the response non-cacheable. Check fo it here.
if (!response.IsBuffered()) {
Debug.Trace("OutputCacheModuleLeave", "Response.Flush() inside GetVaryByCustomString\n\tkey=" + _key);
return;
}
}
DateTime utcExpires = Cache.NoAbsoluteExpiration;
TimeSpan slidingDelta = Cache.NoSlidingExpiration;
if (settings.SlidingExpiration) {
slidingDelta = settings.SlidingDelta;
}
else if (settings.IsMaxAgeSet) {
DateTime utcTimestamp = (settings.UtcTimestampCreated != DateTime.MinValue) ? settings.UtcTimestampCreated : context.UtcTimestamp;
utcExpires = utcTimestamp + settings.MaxAge;
}
else if (settings.IsExpiresSet) {
utcExpires = settings.UtcExpires;
}
// Check and ensure that item hasn't expired:
if (utcExpires > DateTime.UtcNow) {
// Create the response object to be sent on cache hits.
HttpRawResponse httpRawResponse = response.GetSnapshot();
string kernelCacheUrl = response.SetupKernelCaching(null);
Guid cachedVaryId = (cachedVary != null) ? cachedVary.CachedVaryId : Guid.Empty;
CachedRawResponse cachedRawResponse = new CachedRawResponse(httpRawResponse, settings, kernelCacheUrl, cachedVaryId);
Debug.Trace("OutputCacheModuleLeave", "Adding response to cache.\n\tkey=" + keyRawResponse);
CacheDependency dep = response.CreateCacheDependencyForResponse();
try {
OutputCache.InsertResponse(_key, cachedVary,
keyRawResponse, cachedRawResponse,
dep,
utcExpires, slidingDelta);
}
catch {
if (dep != null) {
dep.Dispose();
}
throw;
}
}
_key = null;
Debug.Trace("OutputCacheModuleLeave", "Returning from OutputCacheModule::Leave");
}
private static CachedRawResponse Convert(OutputCacheEntry oce) {
ArrayList headers = null;
if (oce.HeaderElements != null && oce.HeaderElements.Count > 0) {
headers = new ArrayList(oce.HeaderElements.Count);
for (int i = 0; i < oce.HeaderElements.Count; i++) {
HttpResponseHeader h = new HttpResponseHeader(oce.HeaderElements[i].Name, oce.HeaderElements[i].Value);
headers.Add(h);
}
}
ArrayList buffers = null;
if (oce.ResponseElements != null && oce.ResponseElements.Count > 0) {
buffers = new ArrayList(oce.ResponseElements.Count);
for (int i = 0; i < oce.ResponseElements.Count; i++) {
ResponseElement re = oce.ResponseElements[i];
IHttpResponseElement elem = null;
if (re is FileResponseElement) {
HttpContext context = HttpContext.Current;
HttpWorkerRequest wr = (context != null) ? context.WorkerRequest : null;
bool supportsLongTransmitFile = (wr != null && wr.SupportsLongTransmitFile);
bool isImpersonating = ((context != null && context.IsClientImpersonationConfigured) || HttpRuntime.IsOnUNCShareInternal);
FileResponseElement fre = (FileResponseElement)re;
// DevDiv #21203: Need to verify permission to access the requested file since handled by native code.
HttpRuntime.CheckFilePermission(fre.Path);
elem = new HttpFileResponseElement(fre.Path, fre.Offset, fre.Length, isImpersonating, supportsLongTransmitFile);
}
else if (re is MemoryResponseElement) {
MemoryResponseElement mre = (MemoryResponseElement)re;
int size = System.Convert.ToInt32(mre.Length);
elem = new HttpResponseBufferElement(mre.Buffer, size);
}
else if (re is SubstitutionResponseElement) {
SubstitutionResponseElement sre = (SubstitutionResponseElement)re;
elem = new HttpSubstBlockResponseElement(sre.Callback);
}
else {
throw new NotSupportedException();
}
buffers.Add(elem);
}
}
else {
buffers = new ArrayList();
}
HttpRawResponse rawResponse = new HttpRawResponse(oce.StatusCode, oce.StatusDescription, headers, buffers, false /*hasSubstBlocks*/);
CachedRawResponse cachedRawResponse = new CachedRawResponse(rawResponse, oce.Settings, oce.KernelCacheUrl, oce.CachedVaryId);
return cachedRawResponse;
}
/*
* If the item is cacheable, add it to the cache.
*/
/// <include file='doc\OutputCacheModule.uex' path='docs/doc[@for="OutputCacheModule.OnLeave"]/*' />
/// <devdoc>
/// <para>Raises the <see langword='Leave'/> event, which causes any cacheable items to
/// be put into the output cache.</para>
/// </devdoc>
internal /*public*/ void OnLeave(Object source, EventArgs eventArgs)
{
HttpApplication app;
HttpContext context;
bool cacheable;
CachedRawResponse cachedRawResponse;
CachedVary cachedVary;
CachedVary cachedVaryInCache;
HttpCachePolicy cache;
HttpCachePolicySettings settings;
CacheDependency dependency;
CacheDependency dependencyVary;
string keyRawResponse;
string[] varyByHeaders;
string[] varyByParams;
bool varyByAllParams;
HttpRequest request;
HttpResponse response;
DateTime utcTimestamp;
TimeSpan slidingDelta;
HttpRawResponse httpRawResponse;
int i, n;
DateTime utcExpires;
bool cacheAuthorizedPage;
CacheInternal cacheInternal;
Debug.Trace("OutputCacheModuleLeave", "Beginning OutputCacheModule::Leave");
app = (HttpApplication)source;
context = app.Context;
request = context.Request;
response = context.Response;
cache = response.Cache;
#if DBG
string reason = null;
#endif
/*
* Determine whether the response is cacheable.
*/
cacheable = false;
do
{
if (!cache.IsModified())
{
#if DBG
reason = "CachePolicy was not modified from non-caching default.";
#endif
break;
}
if (_key == null)
{
#if DBG
reason = "no key was created for Request in Enter method.";
#endif
break;
}
if (response.StatusCode != 200)
{
#if DBG
reason = "response.StatusCode != 200.";
#endif
break;
}
if (_method == CacheRequestMethod.Head)
{
#if DBG
reason = "the cache cannot cache responses to HEAD requests.";
#endif
break;
}
if (!response.IsBuffered())
{
#if DBG
reason = "the response is not buffered.";
#endif
break;
}
/*
* Change a response with HttpCacheability.Public to HttpCacheability.Private
* if it requires authorization, and allow it to be cached.
*
* Note that setting Cacheability to ServerAndPrivate would accomplish
* the same thing without needing the "cacheAuthorizedPage" variable,
* but in RTM we did not have ServerAndPrivate, and setting that value
* would change the behavior.
*/
cacheAuthorizedPage = false;
if (cache.GetCacheability() == HttpCacheability.Public &&
context.RequestRequiresAuthorization())
{
cache.SetCacheability(HttpCacheability.Private);
cacheAuthorizedPage = true;
}
if (cache.GetCacheability() != HttpCacheability.Public &&
cache.GetCacheability() != HttpCacheability.ServerAndPrivate &&
cache.GetCacheability() != HttpCacheability.ServerAndNoCache &&
!cacheAuthorizedPage)
{
#if DBG
reason = "CachePolicy.Cacheability is not Public, ServerAndPrivate, or ServerAndNoCache.";
#endif
break;
}
if (cache.GetNoServerCaching())
{
#if DBG
reason = "CachePolicy.NoServerCaching is set.";
#endif
break;
}
if (!cache.HasExpirationPolicy() && !cache.HasValidationPolicy())
{
#if DBG
reason = "CachePolicy has no expiration policy or validation policy.";
#endif
break;
}
if (cache.VaryByHeaders.GetVaryByUnspecifiedParameters())
{
#if DBG
reason = "CachePolicy.Vary.VaryByUnspecifiedParameters was called.";
#endif
break;
}
if (!cache.VaryByParams.AcceptsParams() && (_method == CacheRequestMethod.Post || request.QueryStringText != String.Empty))
{
#if DBG
reason = "the cache cannot cache responses to POSTs or GETs with query strings unless Cache.VaryByParams is modified.";
#endif
break;
}
cacheable = true;
} while (false);
/*
* Add response to cache.
*/
if (!cacheable)
{
#if DBG
Debug.Assert(reason != null, "reason != null");
Debug.Trace("OutputCacheModuleLeave", "Item is not output cacheable because " + reason +
"\n\tUrl=" + request.Url.ToString() +
"\nReturning from OutputCacheModule::Leave");
#endif
return;
}
RecordCacheMiss();
settings = cache.GetCurrentSettings(response);
/* Determine the size of the sliding expiration.*/
utcTimestamp = context.UtcTimestamp;
utcExpires = DateTime.MaxValue;
if (settings.SlidingExpiration)
{
slidingDelta = settings.SlidingDelta;
utcExpires = Cache.NoAbsoluteExpiration;
}
else
{
slidingDelta = Cache.NoSlidingExpiration;
if (settings.IsMaxAgeSet)
{
utcExpires = utcTimestamp + settings.MaxAge;
}
else if (settings.IsExpiresSet)
{
utcExpires = settings.UtcExpires;
}
}
varyByHeaders = settings.VaryByHeaders;
if (settings.IgnoreParams)
{
varyByParams = null;
}
else
{
varyByParams = settings.VaryByParams;
}
cacheInternal = HttpRuntime.CacheInternal;
if (varyByHeaders == null && varyByParams == null && settings.VaryByCustom == null)
{
/*
* This is not a varyBy item.
*/
keyRawResponse = _key;
cachedVary = null;
dependencyVary = null;
}
else
{
/*
* There is a vary in the cache policy. We handle this
* by adding another item to the cache which contains
* a list of the vary headers. A request for the item
* without the vary headers in the key will return this
* item. From the headers another key can be constructed
* to lookup the item with the raw response.
*/
if (varyByHeaders != null)
{
for (i = 0, n = varyByHeaders.Length; i < n; i++)
{
varyByHeaders[i] = "HTTP_" + CultureInfo.InvariantCulture.TextInfo.ToUpper(
varyByHeaders[i].Replace('-', '_'));
}
}
varyByAllParams = false;
if (varyByParams != null)
{
varyByAllParams = (varyByParams.Length == 1 && varyByParams[0] == "*");
if (varyByAllParams)
{
varyByParams = null;
}
else
{
for (i = 0, n = varyByParams.Length; i < n; i++)
{
varyByParams[i] = CultureInfo.InvariantCulture.TextInfo.ToLower(varyByParams[i]);
}
}
}
cachedVary = new CachedVary(varyByHeaders, varyByParams, varyByAllParams, settings.VaryByCustom);
keyRawResponse = CreateOutputCachedItemKey(context, cachedVary);
if (keyRawResponse == null)
{
Debug.Trace("OutputCacheModuleLeave", "Couldn't add non-cacheable post.\n\tkey=" + _key);
return;
}
// it is possible that the user code calculating custom vary-by
// string would Flush making the response non-cacheable. Check fo it here.
if (!response.IsBuffered())
{
Debug.Trace("OutputCacheModuleLeave", "Response.Flush() inside GetVaryByCustomString\n\tkey=" + _key);
return;
}
/*
* Add the CachedVary item so that a request will know
* which headers are needed to issue another request.
*
* Use the Add method so that we guarantee we only use
* a single CachedVary and don't overwrite existing ones.
*/
cachedVaryInCache = (CachedVary)cacheInternal.UtcAdd(
_key, cachedVary, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration,
CacheItemPriority.Default, null);
if (cachedVaryInCache != null)
{
if (cachedVary.Equals(cachedVaryInCache))
{
cachedVary = cachedVaryInCache;
}
else
{
Debug.Trace("OutputCacheModuleLeave", "CachedVary definition changed, new CachedVary inserted into cache.\n\tkey=" + _key);
cacheInternal.UtcInsert(_key, cachedVary);
}
}
#if DBG
else
{
Debug.Trace("OutputCacheModuleLeave", "Added CachedVary to cache.\n\tkey=" + _key);
}
#endif
dependencyVary = new CacheDependency(false, null, new string[1] {
_key
});
}
Debug.Trace("OutputCacheModuleLeave", "Adding response to cache.\n\tkey=" + keyRawResponse +
"\nReturning from OutputCacheModule::Leave");
dependency = response.GetCacheDependency(dependencyVary);
/*
* Create the response object to be sent on cache hits.
*/
httpRawResponse = response.GetSnapshot();
cachedRawResponse = new CachedRawResponse(httpRawResponse, settings, cachedVary);
Debug.Trace("OutputCacheModuleLeave", "utcExpires=" + utcExpires + "expires=" + DateTimeUtil.ConvertToLocalTime(utcExpires));
cacheInternal.UtcInsert(
keyRawResponse, cachedRawResponse, dependency, utcExpires,
slidingDelta, CacheItemPriority.Normal, s_cacheItemRemovedCallback);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
}
void DoCacheInsert(HttpContext context, HttpApplication app, HttpResponse response)
{
string vary_key = context.Request.FilePath;
string key;
OutputCacheProvider provider = FindCacheProvider(app);
CachedVaryBy varyby = provider.Get(vary_key) as CachedVaryBy;
CachedRawResponse prev = null;
bool lookup = true;
string cacheKey = null, cacheValue = null;
HttpCachePolicy cachePolicy = response.Cache;
if (varyby == null)
{
varyby = new CachedVaryBy(cachePolicy, vary_key);
provider.Add(vary_key, varyby, Cache.NoAbsoluteExpiration);
lookup = false;
cacheKey = vary_key;
}
key = varyby.CreateKey(vary_key, context);
if (lookup)
{
prev = provider.Get(key) as CachedRawResponse;
}
if (prev == null)
{
CachedRawResponse c = response.GetCachedResponse();
if (c != null)
{
string [] keys = new string [] { vary_key };
DateTime utcExpiry, absoluteExpiration;
TimeSpan slidingExpiration;
c.VaryBy = varyby;
varyby.ItemList.Add(key);
if (cachePolicy.Sliding)
{
slidingExpiration = TimeSpan.FromSeconds(cachePolicy.Duration);
absoluteExpiration = Cache.NoAbsoluteExpiration;
utcExpiry = DateTime.UtcNow + slidingExpiration;
}
else
{
slidingExpiration = Cache.NoSlidingExpiration;
absoluteExpiration = cachePolicy.Expires;
utcExpiry = absoluteExpiration.ToUniversalTime();
}
provider.Set(key, c, utcExpiry);
HttpRuntime.InternalCache.Insert(key, c, new CacheDependency(null, keys), absoluteExpiration, slidingExpiration,
CacheItemPriority.Normal, response_removed);
cacheValue = key;
}
}
if (cacheKey != null)
{
lock (keysCacheLock) {
if (keysCache == null)
{
BuildManager.RemoveEntry += new BuildManagerRemoveEntryEventHandler(OnBuildManagerRemoveEntry);
keysCache = new Dictionary <string, string> (StringComparer.Ordinal);
keysCache.Add(cacheKey, cacheValue);
}
else if (!keysCache.ContainsKey(cacheKey))
{
keysCache.Add(cacheKey, cacheValue);
}
}
}
}
internal void OnLeave(object source, EventArgs eventArgs)
{
HttpApplication application = (HttpApplication)source;
HttpContext context = application.Context;
HttpRequest request = context.Request;
HttpResponse response = context.Response;
HttpCachePolicy cache = null;
bool flag = false;
if (response.HasCachePolicy)
{
cache = response.Cache;
if (((cache.IsModified() && (response.Cookies.Count <= 0)) && (response.StatusCode == 200)) && (((request.HttpVerb == HttpVerb.GET) || (request.HttpVerb == HttpVerb.POST)) && response.IsBuffered()))
{
bool flag3 = false;
if ((cache.GetCacheability() == HttpCacheability.Public) && context.RequestRequiresAuthorization())
{
cache.SetCacheability(HttpCacheability.Private);
flag3 = true;
}
if (((((cache.GetCacheability() == HttpCacheability.Public) || (cache.GetCacheability() == HttpCacheability.ServerAndPrivate)) || ((cache.GetCacheability() == HttpCacheability.Server) || flag3)) && (!cache.GetNoServerCaching() && (cache.HasExpirationPolicy() || cache.HasValidationPolicy()))) && ((!cache.VaryByHeaders.GetVaryByUnspecifiedParameters() && (cache.VaryByParams.AcceptsParams() || ((request.HttpVerb != HttpVerb.POST) && !request.HasQueryString))) && (!cache.VaryByContentEncodings.IsModified() || cache.VaryByContentEncodings.IsCacheableEncoding(context.Response.GetHttpHeaderContentEncoding()))))
{
flag = true;
}
}
}
if (flag)
{
CachedVary vary;
string str;
string[] varyByParams;
this.RecordCacheMiss();
HttpCachePolicySettings currentSettings = cache.GetCurrentSettings(response);
string[] varyByContentEncodings = currentSettings.VaryByContentEncodings;
string[] varyByHeaders = currentSettings.VaryByHeaders;
if (currentSettings.IgnoreParams)
{
varyByParams = null;
}
else
{
varyByParams = currentSettings.VaryByParams;
}
if (this._key == null)
{
this._key = this.CreateOutputCachedItemKey(context, null);
}
if (((varyByContentEncodings == null) && (varyByHeaders == null)) && ((varyByParams == null) && (currentSettings.VaryByCustom == null)))
{
str = this._key;
vary = null;
}
else
{
int num;
int length;
if (varyByHeaders != null)
{
num = 0;
length = varyByHeaders.Length;
while (num < length)
{
varyByHeaders[num] = "HTTP_" + CultureInfo.InvariantCulture.TextInfo.ToUpper(varyByHeaders[num].Replace('-', '_'));
num++;
}
}
bool varyByAllParams = false;
if (varyByParams != null)
{
varyByAllParams = (varyByParams.Length == 1) && (varyByParams[0] == "*");
if (varyByAllParams)
{
varyByParams = null;
}
else
{
num = 0;
length = varyByParams.Length;
while (num < length)
{
varyByParams[num] = CultureInfo.InvariantCulture.TextInfo.ToLower(varyByParams[num]);
num++;
}
}
}
vary = new CachedVary(varyByContentEncodings, varyByHeaders, varyByParams, varyByAllParams, currentSettings.VaryByCustom);
str = this.CreateOutputCachedItemKey(context, vary);
if (str == null)
{
return;
}
if (!response.IsBuffered())
{
return;
}
}
DateTime noAbsoluteExpiration = Cache.NoAbsoluteExpiration;
TimeSpan noSlidingExpiration = Cache.NoSlidingExpiration;
if (currentSettings.SlidingExpiration)
{
noSlidingExpiration = currentSettings.SlidingDelta;
}
else if (currentSettings.IsMaxAgeSet)
{
DateTime time2 = (currentSettings.UtcTimestampCreated != DateTime.MinValue) ? currentSettings.UtcTimestampCreated : context.UtcTimestamp;
noAbsoluteExpiration = time2 + currentSettings.MaxAge;
}
else if (currentSettings.IsExpiresSet)
{
noAbsoluteExpiration = currentSettings.UtcExpires;
}
if (noAbsoluteExpiration > DateTime.UtcNow)
{
HttpRawResponse snapshot = response.GetSnapshot();
string kernelCacheUrl = response.SetupKernelCaching(null);
Guid cachedVaryId = (vary != null) ? vary.CachedVaryId : Guid.Empty;
CachedRawResponse rawResponse = new CachedRawResponse(snapshot, currentSettings, kernelCacheUrl, cachedVaryId);
CacheDependency dependencies = response.CreateCacheDependencyForResponse();
try
{
OutputCache.InsertResponse(this._key, vary, str, rawResponse, dependencies, noAbsoluteExpiration, noSlidingExpiration);
}
catch
{
if (dependencies != null)
{
dependencies.Dispose();
}
throw;
}
}
this._key = null;
}
}
internal void OnEnter(object source, EventArgs eventArgs)
{
this._key = null;
this._recordedCacheMiss = false;
if (OutputCache.InUse)
{
string[] strArray2 = null;
string[] strArray3 = null;
HttpApplication application = (HttpApplication)source;
HttpContext context = application.Context;
context.GetFilePathData();
HttpRequest request = context.Request;
HttpResponse response = context.Response;
switch (request.HttpVerb)
{
case HttpVerb.GET:
case HttpVerb.HEAD:
case HttpVerb.POST:
{
string str;
this._key = str = this.CreateOutputCachedItemKey(context, null);
object obj2 = OutputCache.Get(str);
if (obj2 != null)
{
int num;
int length;
CachedVary cachedVary = obj2 as CachedVary;
if (cachedVary != null)
{
str = this.CreateOutputCachedItemKey(context, cachedVary);
if (str == null)
{
return;
}
if (cachedVary._contentEncodings == null)
{
obj2 = OutputCache.Get(str);
}
else
{
obj2 = null;
bool flag3 = true;
string knownRequestHeader = context.WorkerRequest.GetKnownRequestHeader(0x16);
if (knownRequestHeader != null)
{
string[] contentEncodings = cachedVary._contentEncodings;
int startIndex = 0;
bool flag4 = false;
while (!flag4)
{
flag4 = true;
int index = GetAcceptableEncoding(contentEncodings, startIndex, knownRequestHeader);
if (index > -1)
{
flag3 = false;
obj2 = OutputCache.Get(str + contentEncodings[index]);
if (obj2 == null)
{
startIndex = index + 1;
if (startIndex < contentEncodings.Length)
{
flag4 = false;
}
}
}
else if (index == -2)
{
flag3 = false;
}
}
}
if ((obj2 == null) && flag3)
{
obj2 = OutputCache.Get(str);
}
}
if ((obj2 == null) || (((CachedRawResponse)obj2)._cachedVaryId != cachedVary.CachedVaryId))
{
if (obj2 != null)
{
OutputCache.Remove(str, context);
}
return;
}
}
CachedRawResponse response2 = (CachedRawResponse)obj2;
HttpCachePolicySettings settings = response2._settings;
if ((cachedVary == null) && !settings.IgnoreParams)
{
if (request.HttpVerb == HttpVerb.POST)
{
this.RecordCacheMiss();
return;
}
if (request.HasQueryString)
{
this.RecordCacheMiss();
return;
}
}
if (settings.IgnoreRangeRequests)
{
string str8 = request.Headers["Range"];
if (StringUtil.StringStartsWithIgnoreCase(str8, "bytes"))
{
return;
}
}
if (!settings.HasValidationPolicy())
{
string str4 = request.Headers["Cache-Control"];
if (str4 != null)
{
strArray2 = str4.Split(s_fieldSeparators);
for (num = 0; num < strArray2.Length; num++)
{
string str6 = strArray2[num];
switch (str6)
{
case "no-cache":
case "no-store":
this.RecordCacheMiss();
return;
}
if (StringUtil.StringStartsWith(str6, "max-age="))
{
int num4;
try
{
num4 = Convert.ToInt32(str6.Substring(8), CultureInfo.InvariantCulture);
}
catch
{
num4 = -1;
}
if (num4 >= 0)
{
int num6 = (int)((context.UtcTimestamp.Ticks - settings.UtcTimestampCreated.Ticks) / 0x989680L);
if (num6 >= num4)
{
this.RecordCacheMiss();
return;
}
}
}
else if (StringUtil.StringStartsWith(str6, "min-fresh="))
{
int num5;
try
{
num5 = Convert.ToInt32(str6.Substring(10), CultureInfo.InvariantCulture);
}
catch
{
num5 = -1;
}
if (((num5 >= 0) && settings.IsExpiresSet) && !settings.SlidingExpiration)
{
int num7 = (int)((settings.UtcExpires.Ticks - context.UtcTimestamp.Ticks) / 0x989680L);
if (num7 < num5)
{
this.RecordCacheMiss();
return;
}
}
}
}
}
string str5 = request.Headers["Pragma"];
if (str5 != null)
{
strArray3 = str5.Split(s_fieldSeparators);
for (num = 0; num < strArray3.Length; num++)
{
if (strArray3[num] == "no-cache")
{
this.RecordCacheMiss();
return;
}
}
}
}
else if (settings.ValidationCallbackInfo != null)
{
HttpValidationStatus valid = HttpValidationStatus.Valid;
HttpValidationStatus ignoreThisRequest = valid;
num = 0;
length = settings.ValidationCallbackInfo.Length;
while (num < length)
{
ValidationCallbackInfo info = settings.ValidationCallbackInfo[num];
try
{
info.handler(context, info.data, ref valid);
}
catch (Exception exception)
{
valid = HttpValidationStatus.Invalid;
HttpApplicationFactory.RaiseError(exception);
}
switch (valid)
{
case HttpValidationStatus.Invalid:
OutputCache.Remove(str, context);
this.RecordCacheMiss();
return;
case HttpValidationStatus.IgnoreThisRequest:
ignoreThisRequest = HttpValidationStatus.IgnoreThisRequest;
break;
case HttpValidationStatus.Valid:
break;
default:
valid = ignoreThisRequest;
break;
}
num++;
}
if (ignoreThisRequest == HttpValidationStatus.IgnoreThisRequest)
{
this.RecordCacheMiss();
return;
}
}
HttpRawResponse rawResponse = response2._rawResponse;
if ((cachedVary == null) || (cachedVary._contentEncodings == null))
{
string acceptEncoding = request.Headers["Accept-Encoding"];
string contentEncoding = null;
ArrayList headers = rawResponse.Headers;
if (headers != null)
{
foreach (HttpResponseHeader header in headers)
{
if (header.Name == "Content-Encoding")
{
contentEncoding = header.Value;
break;
}
}
}
if (!IsAcceptableEncoding(contentEncoding, acceptEncoding))
{
this.RecordCacheMiss();
return;
}
}
int num3 = -1;
if (!rawResponse.HasSubstBlocks)
{
string ifModifiedSince = request.IfModifiedSince;
if (ifModifiedSince != null)
{
num3 = 0;
try
{
DateTime time = HttpDate.UtcParse(ifModifiedSince);
if ((settings.IsLastModifiedSet && (settings.UtcLastModified <= time)) && (time <= context.UtcTimestamp))
{
num3 = 1;
}
}
catch
{
}
}
if (num3 != 0)
{
string ifNoneMatch = request.IfNoneMatch;
if (ifNoneMatch != null)
{
num3 = 0;
string[] strArray = ifNoneMatch.Split(s_fieldSeparators);
num = 0;
length = strArray.Length;
while (num < length)
{
if ((num == 0) && strArray[num].Equals("*"))
{
num3 = 1;
break;
}
if (strArray[num].Equals(settings.ETag))
{
num3 = 1;
break;
}
num++;
}
}
}
}
if (num3 == 1)
{
response.ClearAll();
response.StatusCode = 0x130;
}
else
{
bool sendBody = request.HttpVerb != HttpVerb.HEAD;
response.UseSnapshot(rawResponse, sendBody);
}
response.Cache.ResetFromHttpCachePolicySettings(settings, context.UtcTimestamp);
string originalCacheUrl = response2._kernelCacheUrl;
if (originalCacheUrl != null)
{
response.SetupKernelCaching(originalCacheUrl);
}
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_RATIO_BASE);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_HITS);
this._key = null;
this._recordedCacheMiss = false;
application.CompleteRequest();
return;
}
return;
}
}
}
}
private static OutputCacheEntry Convert(CachedRawResponse cachedRawResponse, string depKey, string[] fileDependencies) {
List<HeaderElement> headerElements = null;
ArrayList headers = cachedRawResponse._rawResponse.Headers;
int count = (headers != null) ? headers.Count : 0;
for (int i = 0; i < count; i++) {
if (headerElements == null) {
headerElements = new List<HeaderElement>(count);
}
HttpResponseHeader h = (HttpResponseHeader)(headers[i]);
headerElements.Add(new HeaderElement(h.Name, h.Value));
}
List<ResponseElement> responseElements = null;
ArrayList buffers = cachedRawResponse._rawResponse.Buffers;
count = (buffers != null) ? buffers.Count : 0;
for (int i = 0; i < count; i++) {
if (responseElements == null) {
responseElements = new List<ResponseElement>(count);
}
IHttpResponseElement elem = buffers[i] as IHttpResponseElement;
if (elem is HttpFileResponseElement) {
HttpFileResponseElement fileElement = elem as HttpFileResponseElement;
responseElements.Add(new FileResponseElement(fileElement.FileName, fileElement.Offset, elem.GetSize()));
}
else if (elem is HttpSubstBlockResponseElement) {
HttpSubstBlockResponseElement substElement = elem as HttpSubstBlockResponseElement;
responseElements.Add(new SubstitutionResponseElement(substElement.Callback));
}
else {
byte[] b = elem.GetBytes();
long length = (b != null) ? b.Length : 0;
responseElements.Add(new MemoryResponseElement(b, length));
}
}
OutputCacheEntry oce = new OutputCacheEntry(
cachedRawResponse._cachedVaryId,
cachedRawResponse._settings,
cachedRawResponse._kernelCacheUrl,
depKey,
fileDependencies,
cachedRawResponse._rawResponse.StatusCode,
cachedRawResponse._rawResponse.StatusDescription,
headerElements,
responseElements
);
return oce;
}
private void OnCacheabilityUpdated (object sender, CacheabilityUpdatedEventArgs e)
{
if (e.Cacheability >= HttpCacheability.Server && !IsCached)
cached_response = new CachedRawResponse (_CachePolicy);
else if (e.Cacheability <= HttpCacheability.Private)
cached_response = null;
}
// insert cached vary or output cache entry
internal static void InsertResponse(String cachedVaryKey, CachedVary cachedVary,
String rawResponseKey, CachedRawResponse rawResponse,
CacheDependency dependencies,
DateTime absExp, TimeSpan slidingExp) {
// if the provider is undefined or the fragment can't be inserted in the
// provider, insert it in the internal cache.
OutputCacheProvider provider = GetProvider(HttpContext.Current);
//
// CachedVary can be serialized.
// CachedRawResponse is not always serializable.
//
bool useProvider = (provider != null);
if (useProvider) {
bool canUseProvider = (IsSubstBlockSerializable(rawResponse._rawResponse)
&& rawResponse._settings.IsValidationCallbackSerializable()
&& slidingExp == Cache.NoSlidingExpiration
&& (dependencies == null || dependencies.IsFileDependency()));
if (useProvider && !canUseProvider) {
throw new ProviderException(SR.GetString(SR.Provider_does_not_support_policy_for_responses, provider.Name));
}
}
#if DBG
bool cachedVaryPutInCache = (cachedVary != null);
#endif
if (cachedVary != null) {
/*
* Add the CachedVary item so that a request will know
* which headers are needed to issue another request.
*
* Use the Add method so that we guarantee we only use
* a single CachedVary and don't overwrite existing ones.
*/
CachedVary cachedVaryInCache;
if (!useProvider) {
cachedVaryInCache = OutputCache.UtcAdd(cachedVaryKey, cachedVary);
}
else {
cachedVaryInCache = (CachedVary) provider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (cachedVaryInCache != null) {
if (!cachedVary.Equals(cachedVaryInCache)) {
if (!useProvider) {
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else {
provider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else {
cachedVary = cachedVaryInCache;
#if DBG
cachedVaryPutInCache = false;
#endif
}
}
if (!useProvider) {
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
// not all caches support cache key dependencies, but we can use a "change number" to associate
// the ControlCachedVary and the PartialCachingCacheEntry
rawResponse._cachedVaryId = cachedVary.CachedVaryId;
}
// Now insert into the cache (use cache provider if possible, otherwise use internal cache)
if (!useProvider) {
HttpRuntime.CacheInternal.UtcInsert(rawResponseKey, rawResponse,
dependencies,
absExp, slidingExp,
CacheItemPriority.Normal,
s_entryRemovedCallback);
IncrementCount();
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_ENTRIES);
PerfCounters.IncrementCounter(AppPerfCounter.OUTPUT_CACHE_TURNOVER_RATE);
}
else {
string depKey = null;
string[] fileDeps = null;
if (dependencies != null) {
depKey = OUTPUTCACHE_KEYPREFIX_DEPENDENCIES + dependencies.GetUniqueID();
fileDeps = dependencies.GetFileDependencies();
}
OutputCacheEntry oce = Convert(rawResponse, depKey, fileDeps);
provider.Set(rawResponseKey, oce, absExp);
if (dependencies != null) {
// use Add and dispose dependencies if there's already one in the cache
Object d = HttpRuntime.CacheInternal.UtcAdd(depKey, new DependencyCacheEntry(rawResponseKey, oce.KernelCacheUrl, provider.Name),
dependencies,
absExp, Cache.NoSlidingExpiration,
CacheItemPriority.Normal, s_dependencyRemovedCallback);
if (d != null) {
dependencies.Dispose();
}
}
}
#if DBG
string cachedVaryType = (cachedVaryPutInCache) ? "CachedVary" : "";
string providerUsed = (useProvider) ? provider.Name : "CacheInternal";
Debug.Trace("OutputCache", "InsertResposne("
+ cachedVaryKey + ", "
+ cachedVaryType + ", "
+ rawResponseKey + ", CachedRawResponse, ...) -->"
+ providerUsed);
#endif
}
void DoCacheInsert(HttpContext context)
{
string vary_key = context.Request.FilePath;
string key;
CachedVaryBy varyby = context.Cache [vary_key] as CachedVaryBy;
CachedRawResponse prev = null;
bool lookup = true;
#if NET_2_0
string cacheKey = null, cacheValue = null;
#endif
if (varyby == null)
{
string path = context.Request.MapPath(vary_key);
string [] files = new string [] { path };
string [] keys = new string [0];
varyby = new CachedVaryBy(context.Response.Cache, vary_key);
context.Cache.Insert(vary_key, varyby,
new CacheDependency(files, keys),
Cache.NoAbsoluteExpiration,
Cache.NoSlidingExpiration,
CacheItemPriority.Normal, null);
lookup = false;
#if NET_2_0
cacheKey = vary_key;
#endif
}
key = varyby.CreateKey(vary_key, context);
if (lookup)
{
prev = context.InternalCache [key] as CachedRawResponse;
}
if (prev == null)
{
CachedRawResponse c = context.Response.GetCachedResponse();
if (c != null)
{
string [] files = new string [] { };
string [] keys = new string [] { vary_key };
bool sliding = context.Response.Cache.Sliding;
context.InternalCache.Insert(key, c, new CacheDependency(files, keys),
(sliding ? Cache.NoAbsoluteExpiration :
context.Response.Cache.Expires),
(sliding ? TimeSpan.FromSeconds(
context.Response.Cache.Duration) :
Cache.NoSlidingExpiration),
CacheItemPriority.Normal, response_removed);
c.VaryBy = varyby;
varyby.ItemList.Add(key);
#if NET_2_0
cacheValue = key;
#endif
}
}
#if NET_2_0
if (cacheKey != null)
{
lock (keysCacheLock) {
if (keysCache == null)
{
BuildManager.RemoveEntry += new BuildManagerRemoveEntryEventHandler(OnBuildManagerRemoveEntry);
keysCache = new Dictionary <string, string> (StringComparer.Ordinal);
keysCache.Add(cacheKey, cacheValue);
}
else if (!keysCache.ContainsKey(cacheKey))
{
keysCache.Add(cacheKey, cacheValue);
}
}
}
#endif
}
