/// <summary>
/// Attempts to apply some caching rules to a response
/// </summary>
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var response = await base.SendAsync(request, cancellationToken);
var cacheHeaders = new CacheControlHeaderValue
{
NoCache = true
};
if ((int)response.StatusCode > 400 || // 400 and above are errors
response.StatusCode == HttpStatusCode.NoContent || // no content, no cache
response.StatusCode == HttpStatusCode.Created) // any 201 Created response is not cacheable as the response is based off of the request body
{
// no caching allowed
cacheHeaders.NoStore = true;
}
else if (response.StatusCode == HttpStatusCode.OK)
{
// 200 Okay responses should generally be cached
cacheHeaders.NoStore = false;
cacheHeaders.Private = false;
// always revalidate
cacheHeaders.MaxAge = new TimeSpan(0, 0, 0);
}
response.Headers.CacheControl = cacheHeaders;
return response;
}
public bool Should_be_determined_from_MaxAge_and_cacheControl(int maxAge, bool? noCache, bool? noStore, int? cacheControlMaxAge, bool ignoreRevalidation)
{
CacheControlHeaderValue cacheControl = null;
if (noCache.HasValue || noStore.HasValue || cacheControlMaxAge.HasValue)
{
cacheControl = new CacheControlHeaderValue
{
NoCache = noCache ?? false,
NoStore = noStore ?? false,
};
if (cacheControlMaxAge.HasValue)
{
cacheControl.MaxAge = TimeSpan.FromSeconds(cacheControlMaxAge.Value);
}
}
var att = new OutputCacheAttributeWithPublicMethods
{
MaxAge = (uint)maxAge,
IgnoreRevalidationRequest = ignoreRevalidation
};
// Action
return att.ShouldIgnoreCachePublic(cacheControl, new HttpRequestMessage());
}
public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
{
var cachecontrol = new CacheControlHeaderValue();
cachecontrol.MaxAge = TimeSpan.FromSeconds(_clientTimeSpan);
cachecontrol.MustRevalidate = true;
actionExecutedContext.ActionContext.Response.Headers.CacheControl = cachecontrol;
}
public void Should_return_null_if_cache_not_mature_as_min_fresh_request()
{
// Arrange
var cacheControl = new CacheControlHeaderValue
{
MinFresh = TimeSpan.FromSeconds(100)
};
var cacheItem = new WebApiCacheItem
{
CreatedTime = DateTime.UtcNow.AddSeconds(-20),
MaxAge = 1000,
StaleWhileRevalidate = 5,
IgnoreRevalidationRequest = false
};
var request = new HttpRequestMessage();
var svc = new CacheResponseBuilder { };
// Action
var response = svc.GetResponse(cacheControl, cacheItem, request);
// Assert
Assert.IsNull(response);
}
public void Subscribe(Uri subscriptionUri, Uri callbackUri, TimeSpan subscriptionTimeSpan)
{
var httpClient = new HttpClient();
var req = new HttpRequestMessage
{
RequestUri = subscriptionUri,
Version = HttpVersion.Version11
};
req.Headers.UserAgent.Add(new ProductInfoHeaderValue("SimpleSonos", "1.0"));
req.Method = new HttpMethod("SUBSCRIBE");
req.Headers.Add("CALLBACK", "<" + callbackUri.AbsoluteUri + ">");
req.Headers.Add("NT", "upnp:event");
req.Headers.Add("TIMEOUT", "Second-" + (int) subscriptionTimeSpan.TotalSeconds);
req.Headers.ConnectionClose = true;
var cch = new CacheControlHeaderValue {NoCache = true};
req.Headers.CacheControl = cch;
try
{
var resp = httpClient.SendAsync(req).Result;
Console.WriteLine("Gor response from " + subscriptionUri.Host + ". StatusCode: " + resp.StatusCode);
if (resp.Headers.Contains("SID"))
Console.WriteLine("SID: " + resp.Headers.GetValues("SID").First());
if (resp.Headers.Contains("TIMEOUT"))
Console.WriteLine("TIMEOUT: " + resp.Headers.GetValues("TIMEOUT").First());
if (resp.Headers.Contains("Server"))
Console.WriteLine("Server: " + resp.Headers.GetValues("Server").First());
}
catch (Exception e)
{
Console.WriteLine("ERROR TRYING TO SUBSCRIBE " + e);
}
}
private CacheControlHeaderValue setClientCache()
{
var cachecontrol = new CacheControlHeaderValue();
cachecontrol.MaxAge = TimeSpan.FromSeconds(_clientTimeSpan);
cachecontrol.MustRevalidate = true;
return cachecontrol;
}
public NotModifiedResponse(HttpRequestMessage request, CacheControlHeaderValue cacheControlHeaderValue, EntityTagHeaderValue etag)
: base(HttpStatusCode.NotModified)
{
if(etag!=null)
this.Headers.ETag = etag;
this.Headers.CacheControl = cacheControlHeaderValue;
this.RequestMessage = request;
}
private void CheckValidParsedValue(string input, int startIndex, CacheControlHeaderValue expectedResult,
int expectedIndex)
{
HttpHeaderParser parser = CacheControlHeaderParser.Parser;
object result = null;
Assert.True(parser.TryParseValue(input, null, ref startIndex, out result));
Assert.Equal(expectedIndex, startIndex);
Assert.Equal(result, expectedResult);
}
/// <summary>
/// default .ctor is no cache policy
/// </summary>
public HttpCacheControlPolicyAttribute()
{
_cacheControl = new CacheControlHeaderValue()
{
Private = true,
NoCache = true,
NoStore = true
};
}
private CacheControlHeaderValue SetClientCache()
{
var cachecontrol = new CacheControlHeaderValue
{
MaxAge = TimeSpan.FromSeconds(Duration),
MustRevalidate = true
};
return cachecontrol;
}
public void Properties_SetAndGetAllProperties_SetValueReturnedInGetter()
{
CacheControlHeaderValue cacheControl = new CacheControlHeaderValue();
// Bool properties
cacheControl.NoCache = true;
Assert.True(cacheControl.NoCache);
cacheControl.NoStore = true;
Assert.True(cacheControl.NoStore);
cacheControl.MaxStale = true;
Assert.True(cacheControl.MaxStale);
cacheControl.NoTransform = true;
Assert.True(cacheControl.NoTransform);
cacheControl.OnlyIfCached = true;
Assert.True(cacheControl.OnlyIfCached);
cacheControl.Public = true;
Assert.True(cacheControl.Public);
cacheControl.Private = true;
Assert.True(cacheControl.Private);
cacheControl.MustRevalidate = true;
Assert.True(cacheControl.MustRevalidate);
cacheControl.ProxyRevalidate = true;
Assert.True(cacheControl.ProxyRevalidate);
// TimeSpan properties
TimeSpan timeSpan = new TimeSpan(1, 2, 3);
cacheControl.MaxAge = timeSpan;
Assert.Equal(timeSpan, cacheControl.MaxAge);
cacheControl.SharedMaxAge = timeSpan;
Assert.Equal(timeSpan, cacheControl.SharedMaxAge);
cacheControl.MaxStaleLimit = timeSpan;
Assert.Equal(timeSpan, cacheControl.MaxStaleLimit);
cacheControl.MinFresh = timeSpan;
Assert.Equal(timeSpan, cacheControl.MinFresh);
// String collection properties
Assert.NotNull(cacheControl.NoCacheHeaders);
Assert.Throws<ArgumentException>(() => { cacheControl.NoCacheHeaders.Add(null); });
Assert.Throws<FormatException>(() => { cacheControl.NoCacheHeaders.Add("invalid token"); });
cacheControl.NoCacheHeaders.Add("token");
Assert.Equal(1, cacheControl.NoCacheHeaders.Count);
Assert.Equal("token", cacheControl.NoCacheHeaders.First());
Assert.NotNull(cacheControl.PrivateHeaders);
Assert.Throws<ArgumentException>(() => { cacheControl.PrivateHeaders.Add(null); });
Assert.Throws<FormatException>(() => { cacheControl.PrivateHeaders.Add("invalid token"); });
cacheControl.PrivateHeaders.Add("token");
Assert.Equal(1, cacheControl.PrivateHeaders.Count);
Assert.Equal("token", cacheControl.PrivateHeaders.First());
// NameValueHeaderValue collection property
Assert.NotNull(cacheControl.Extensions);
Assert.Throws<ArgumentNullException>(() => { cacheControl.Extensions.Add(null); });
cacheControl.Extensions.Add(new NameValueHeaderValue("name", "value"));
Assert.Equal(1, cacheControl.Extensions.Count);
Assert.Equal(new NameValueHeaderValue("name", "value"), cacheControl.Extensions.First());
}
/// <summary>
/// Sets the cache headers
/// </summary>
/// <param name="response">The actual response</param>
protected virtual void ApplyCacheHeaders(
HttpResponseMessage response)
{
var cacheControl = new CacheControlHeaderValue
{
MaxAge = TimeSpan.FromSeconds(ClientTimeSpan)
};
response.Headers.CacheControl = cacheControl;
}
public HttpCacheControlPolicyAttribute(bool isPrivate, int maxAgeInSeconds)
: this()
{
_cacheControl = new CacheControlHeaderValue()
{
Private = isPrivate,
Public = !isPrivate,
MustRevalidate = true,
MaxAge = TimeSpan.FromSeconds(maxAgeInSeconds)
};
}
/// <summary>
/// Uses a factory type to provide the value.
/// This type can read from config, etc.
/// Must have a public parameterless method that return CacheControlHeaderValue
/// </summary>
/// <param name="cacheControlHeaderValueFactory">The type of the factory.
/// Any public method that returns CacheControlHeaderValue will be used.
/// Type's constructor must be parameterless</param>
public HttpCacheControlPolicyAttribute(Type cacheControlHeaderValueFactory)
{
var factory = Activator.CreateInstance(cacheControlHeaderValueFactory);
var method = factory.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance)
.FirstOrDefault(m => m.ReturnType == typeof(CacheControlHeaderValue));
if(method == null)
throw new ArgumentException("This type does not have a factory method: " + cacheControlHeaderValueFactory.FullName);
_cacheControl = (CacheControlHeaderValue) method.Invoke(factory, new object[0]);
}
public void Should_return_GatewayTimeout_when_no_cache_and_request_sent_OnlyIfCached_control()
{
// Arrange
var cacheControl = new CacheControlHeaderValue {OnlyIfCached = true};
var svc = new CacheResponseBuilder();
// Action
var result = svc.GetResponse(cacheControl, null, new HttpRequestMessage());
// Assert
Assert.AreEqual(HttpStatusCode.GatewayTimeout, result.StatusCode);
Assert.AreEqual("no cache available", result.Headers.GetValues("X-Flatwhite-Message").Single());
}
public void HttpProvider_CustomCacheHeaderAndTimeout()
{
var timeout = TimeSpan.FromSeconds(200);
var cacheHeader = new CacheControlHeaderValue();
using (var defaultHttpProvider = new HttpProvider(null) { CacheControlHeader = cacheHeader, OverallTimeout = timeout })
{
Assert.IsFalse(defaultHttpProvider.httpClient.DefaultRequestHeaders.CacheControl.NoCache, "NoCache true.");
Assert.IsFalse(defaultHttpProvider.httpClient.DefaultRequestHeaders.CacheControl.NoStore, "NoStore true.");
Assert.AreEqual(timeout, defaultHttpProvider.httpClient.Timeout, "Unexpected default timeout set.");
Assert.IsNotNull(defaultHttpProvider.Serializer, "Serializer not initialized.");
Assert.IsInstanceOfType(defaultHttpProvider.Serializer, typeof(Serializer), "Unexpected serializer initialized.");
}
}
public async Task Should_return_new_etag_if_cache_item_found_but_doesnt_match_checksum(string cacheChecksum, HttpStatusCode resultCode)
{
// Arrange
var cacheControl = new CacheControlHeaderValue
{
MaxStale = true,
MaxStaleLimit = TimeSpan.FromSeconds(15),
MinFresh = TimeSpan.FromSeconds(20)
};
var oldCacheItem = new WebApiCacheItem
{
CreatedTime = DateTime.UtcNow.AddSeconds(-11),
MaxAge = 10,
StaleWhileRevalidate = 5,
IgnoreRevalidationRequest = true,
ResponseCharSet = "UTF8",
ResponseMediaType = "text/json",
Content = new byte[0],
Key = "fw-0-HASHEDKEY",
Checksum = cacheChecksum
};
var request = new HttpRequestMessage
{
Method = new HttpMethod("GET"),
RequestUri = new Uri("http://localhost")
};
request.Headers.Add("If-None-Match", "\"fw-0-HASHEDKEY-OLDCHECKSUM\"");
var builder = new CacheResponseBuilder();
var handler = new EtagHeaderHandler(builder);
await Global.CacheStoreProvider.GetAsyncCacheStore().SetAsync("fw-0-HASHEDKEY", oldCacheItem, DateTimeOffset.Now.AddDays(1)).ConfigureAwait(false);
// Action
Global.Cache.PhoenixFireCage["fw-0-HASHEDKEY"] = new WebApiPhoenix(NSubstitute.Substitute.For<_IInvocation>(), new CacheInfo(), oldCacheItem, request);
var response = await handler.HandleAsync(cacheControl, request, CancellationToken.None).ConfigureAwait(false);
Assert.AreEqual(resultCode, response.StatusCode);
if (resultCode == HttpStatusCode.OK)
{
Assert.AreEqual($"\"fw-0-HASHEDKEY-{cacheChecksum}\"", response.Headers.ETag.Tag);
}
else
{
Assert.IsNull(response.Headers.ETag);
}
}
public void TryParse_SetOfValidValueStrings_ParsedCorrectly()
{
// Just verify parser is implemented correctly. Don't try to test syntax parsed by CacheControlHeaderValue.
CacheControlHeaderValue expected = new CacheControlHeaderValue();
expected.NoStore = true;
expected.MinFresh = new TimeSpan(0, 2, 3);
CheckValidParsedValue("X , , no-store, min-fresh=123", 1, expected, 29);
expected = new CacheControlHeaderValue();
expected.MaxStale = true;
expected.NoCache = true;
expected.NoCacheHeaders.Add("t");
CheckValidParsedValue("max-stale, no-cache=\"t\", ,,", 0, expected, 27);
}
public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
{
if (actionExecutedContext.Response.StatusCode >= HttpStatusCode.InternalServerError)
{
return;
}
var cachecontrol = new CacheControlHeaderValue
{
MaxAge = TimeSpan.FromSeconds(ClientTimeSpan),
MustRevalidate = true,
Public = true
};
actionExecutedContext.Response.Headers.CacheControl = cachecontrol;
}
public async Task Should_return_null_if_no_etag_in_request()
{
// Arrange
var cacheControl = new CacheControlHeaderValue();
var request = new HttpRequestMessage
{
Method = new HttpMethod("GET"),
RequestUri = new Uri("http://localhost")
};
var builder = Substitute.For<ICacheResponseBuilder>();
var handler = new EtagHeaderHandler(builder);
// Action
var response = await handler.HandleAsync(cacheControl, request, CancellationToken.None);
Assert.IsNull(response);
}
public void TestRefreshPolicyFor404()
{
var configuration = new HttpConfiguration(new HttpRouteCollection("/"));
configuration.Services.Replace(typeof (IHttpControllerSelector), new NotFoundControllerSelector());
configuration.Routes.MapHttpRoute("main", "api/{controller}/{id}");
var request = new HttpRequestMessage(HttpMethod.Get, new Uri("http://aliostad/api/CachePolicyAction/1"));
var routeData = configuration.Routes.GetRouteData(request);
request.Properties.Add(HttpPropertyKeys.HttpRouteDataKey, (object)routeData);
var headerValue = new CacheControlHeaderValue();
var attributeBasedCachePolicy = new AttributeBasedCacheControlPolicy(headerValue);
// act
var cchv = attributeBasedCachePolicy.GetCacheControl(request, configuration);
// assert
Assert.AreEqual(headerValue, cchv);
}
public async Task Should_return_null_if_cache_item_not_found()
{
// Arrange
var cacheControl = new CacheControlHeaderValue();
var request = new HttpRequestMessage
{
Method = new HttpMethod("GET"),
RequestUri = new Uri("http://localhost")
};
request.Headers.Add("If-None-Match", "\"fw-1000-HASHEDKEY-CHECKSUM\"");
var builder = Substitute.For<ICacheResponseBuilder>();
var handler = new EtagHeaderHandler(builder);
// Action
var response = await handler.HandleAsync(cacheControl, request, CancellationToken.None);
Assert.IsNull(response);
}
public HttpCacheControlPolicyAttribute(bool isPrivate,
int maxAgeInSeconds,
bool mustRevalidate = true,
bool noCache = false,
bool noTransform = false)
: this()
{
// copy values to the header
_cacheControl = new CacheControlHeaderValue()
{
Private = isPrivate,
Public = !isPrivate,
MustRevalidate = mustRevalidate,
MaxAge = TimeSpan.FromSeconds(maxAgeInSeconds),
NoCache = noCache,
NoTransform = noTransform
};
}
protected CacheControlHeaderValue CloneCacheControlHeaderValue(CacheControlHeaderValue headerValue)
{
return new CacheControlHeaderValue()
{
MaxAge = headerValue.MaxAge,
MaxStale = headerValue.MaxStale,
MaxStaleLimit = headerValue.MaxStaleLimit,
MinFresh = headerValue.MinFresh,
MustRevalidate = headerValue.MustRevalidate,
NoCache = headerValue.NoCache,
NoStore = headerValue.NoStore,
NoTransform = headerValue.NoTransform,
OnlyIfCached = headerValue.OnlyIfCached,
Private = headerValue.Private,
ProxyRevalidate = headerValue.ProxyRevalidate,
Public = headerValue.Public,
SharedMaxAge = headerValue.SharedMaxAge
};
}
private CacheControlHeaderValue(CacheControlHeaderValue source)
{
Debug.Assert(source != null);
_noCache = source._noCache;
_noStore = source._noStore;
_maxAge = source._maxAge;
_sharedMaxAge = source._sharedMaxAge;
_maxStale = source._maxStale;
_maxStaleLimit = source._maxStaleLimit;
_minFresh = source._minFresh;
_noTransform = source._noTransform;
_onlyIfCached = source._onlyIfCached;
_publicField = source._publicField;
_privateField = source._privateField;
_mustRevalidate = source._mustRevalidate;
_proxyRevalidate = source._proxyRevalidate;
if (source._noCacheHeaders != null)
{
foreach (var noCacheHeader in source._noCacheHeaders)
{
NoCacheHeaders.Add(noCacheHeader);
}
}
if (source._privateHeaders != null)
{
foreach (var privateHeader in source._privateHeaders)
{
PrivateHeaders.Add(privateHeader);
}
}
if (source._extensions != null)
{
foreach (var extension in source._extensions)
{
Extensions.Add((NameValueHeaderValue)((ICloneable)extension).Clone());
}
}
}
private CacheControlHeaderValue(CacheControlHeaderValue source)
{
Contract.Requires(source != null);
noCache = source.noCache;
noStore = source.noStore;
maxAge = source.maxAge;
sharedMaxAge = source.sharedMaxAge;
maxStale = source.maxStale;
maxStaleLimit = source.maxStaleLimit;
minFresh = source.minFresh;
noTransform = source.noTransform;
onlyIfCached = source.onlyIfCached;
publicField = source.publicField;
privateField = source.privateField;
mustRevalidate = source.mustRevalidate;
proxyRevalidate = source.proxyRevalidate;
if (source.noCacheHeaders != null)
{
foreach (var noCacheHeader in source.noCacheHeaders)
{
NoCacheHeaders.Add(noCacheHeader);
}
}
if (source.privateHeaders != null)
{
foreach (var privateHeader in source.privateHeaders)
{
PrivateHeaders.Add(privateHeader);
}
}
if (source.extensions != null)
{
foreach (var extension in source.extensions)
{
Extensions.Add((NameValueHeaderValue)((ICloneable)extension).Clone());
}
}
}
private CacheControlHeaderValue(CacheControlHeaderValue source)
{
Contract.Requires(source != null);
noCache = source.noCache;
noStore = source.noStore;
maxAge = source.maxAge;
sharedMaxAge = source.sharedMaxAge;
maxStale = source.maxStale;
maxStaleLimit = source.maxStaleLimit;
minFresh = source.minFresh;
noTransform = source.noTransform;
onlyIfCached = source.onlyIfCached;
publicField = source.publicField;
privateField = source.privateField;
mustRevalidate = source.mustRevalidate;
proxyRevalidate = source.proxyRevalidate;
if (source.noCacheHeaders != null)
{
foreach (var noCacheHeader in source.noCacheHeaders)
{
NoCacheHeaders.Add(noCacheHeader);
}
}
if (source.privateHeaders != null)
{
foreach (var privateHeader in source.privateHeaders)
{
PrivateHeaders.Add(privateHeader);
}
}
if (source.extensions != null)
{
foreach (var extension in source.extensions)
{
Extensions.Add((NameValueHeaderValue)((ICloneable)extension).Clone());
}
}
}
public void Ctor_Default ()
{
var value = new CacheControlHeaderValue ();
Assert.AreEqual (0, value.Extensions.Count, "#1");
Assert.IsNull (value.MaxAge, "#2");
Assert.IsFalse (value.MaxStale, "#3");
Assert.IsNull (value.MaxStaleLimit, "#4");
Assert.IsNull (value.MinFresh, "#5");
Assert.IsFalse (value.MustRevalidate, "#6");
Assert.IsFalse (value.NoCache, "#7");
Assert.IsFalse (value.NoStore, "#8");
Assert.IsFalse (value.NoTransform, "#9");
Assert.IsFalse (value.OnlyIfCached, "#10");
Assert.IsFalse (value.Private, "#11");
Assert.AreEqual (0, value.PrivateHeaders.Count, "#12");
Assert.IsFalse (value.ProxyRevalidate, "#13");
Assert.IsFalse (value.Public, "#14");
Assert.IsNull (value.SharedMaxAge, "#15");
}
public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
{
// if some exception happened before in pipeline, response will be null
if (actionExecutedContext.Response == null)
{
return;
}
HttpStatusCode statusCode = actionExecutedContext.Response.StatusCode;
if (statusCode == HttpStatusCode.OK || statusCode == HttpStatusCode.NotModified)
{
var response = actionExecutedContext.Response;
var cacheControl = new CacheControlHeaderValue();
cacheControl.MaxAge = TimeSpan.FromSeconds(MaxAge);
response.Headers.CacheControl = cacheControl;
}
base.OnActionExecuted(actionExecutedContext);
}
public static void ApplyCacheRequestDirective(this HttpRequestMessage requestMessage, CacheRequestDirective cacheDirective, ConditionalRequestDirective conditionalDirective)
{
var cacheControlHeader = new CacheControlHeaderValue();
cacheControlHeader.MaxAge = cacheDirective.MaxAge;
cacheControlHeader.MaxStale = cacheDirective.MaxStale.HasValue;
if (cacheDirective.MaxStale != TimeSpan.MaxValue)
cacheControlHeader.MaxStaleLimit = cacheDirective.MaxStale;
cacheControlHeader.MinFresh = cacheDirective.MinFresh;
cacheControlHeader.NoCache = cacheDirective.NoCache;
if (cacheDirective.NoCache)
requestMessage.Headers.Pragma.Add(new NameValueHeaderValue("no-cache"));
cacheControlHeader.NoStore = cacheDirective.NoStore;
// TODO deal with no-transform
cacheControlHeader.OnlyIfCached = cacheDirective.OnlyIfCached;
requestMessage.Headers.CacheControl = cacheControlHeader;
requestMessage.Headers.IfModifiedSince = conditionalDirective.IfModifiedSince;
requestMessage.Headers.IfUnmodifiedSince = conditionalDirective.IfUnmodifiedSince;
CopyETags(conditionalDirective.IfMatch, requestMessage.Headers.IfMatch);
CopyETags(conditionalDirective.IfNoneMatch, requestMessage.Headers.IfNoneMatch);
}
/// <summary>
/// cacheControl ヘッダ値によりキャッシュ要素を作成、登録します。
/// </summary>
/// <param name="requestUri"></param>
/// <param name="cacheControl"></param>
/// <param name="eTag"></param>
/// <param name="content"></param>
public static void CreateEntry(string requestUri,
CacheControlHeaderValue cacheControl,
string eTag,
string content)
{
Contract.Requires(requestUri!=null);
Contract.Requires(cacheControl!=null);
Contract.Requires(eTag!=null);
Contract.Requires(content!=null);
if(CacheProvider==null) return;
if( cacheControl.NoCache ) return;
CacheProvider.CreateEntry(
new CacheEntry(requestUri)
{
Content = content,
ETag = eTag,
ExpireAt = DateTime.UtcNow.Add(cacheControl.MaxAge ?? TimeSpan.FromSeconds(60))
});
}
/// <summary>
/// Try to get the cache from etag and build the response if cache is available
/// </summary>
/// <param name="cacheControl"></param>
/// <param name="request"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task<HttpResponseMessage> HandleAsync(CacheControlHeaderValue cacheControl, HttpRequestMessage request, CancellationToken cancellationToken)
{
if (request.Headers.IfNoneMatch != null)
{
// Etag format: fw-StoreId-HashedKey-Checksum
var requestEtags = request.Headers.IfNoneMatch.Where(t => t.Tag != null && t.Tag.StartsWith("\"fw-")).ToList();
if (requestEtags.Count > 0)
{
foreach (var etag in requestEtags)
{
var etagString = etag.Tag.Trim('"');
var index = etagString.IndexOf("-", 4, StringComparison.Ordinal);
var storeIdString = index > 0 ? etagString.Substring(3, index - 3) : "0";
index = etagString.LastIndexOf("-", StringComparison.Ordinal);
int storeId;
IAsyncCacheStore cacheStore = null;
if (int.TryParse(storeIdString, out storeId))
{
cacheStore = Global.CacheStoreProvider.GetAsyncCacheStore(storeId) ?? Global.CacheStoreProvider.GetAsyncCacheStore();
}
if (cacheStore != null && index > 0)
{
var hashedKey = etagString.Substring(0, index);
var checkSum = etagString.Substring(index + 1);
var cacheItem = (await cacheStore.GetAsync(hashedKey)) as WebApiCacheItem;
if (cacheItem != null && cacheItem.Checksum == checkSum)
{
request.Properties[WebApiExtensions.__webApi_etag_matched] = true;
}
return _builder.GetResponse(cacheControl, cacheItem, request);
}
}
}
}
return null;
}
public override bool Equals(object obj)
{
CacheControlHeaderValue other = obj as CacheControlHeaderValue;
if (other == null)
{
return(false);
}
if ((noCache != other.noCache) || (noStore != other.noStore) || (maxAge != other.maxAge) ||
(sharedMaxAge != other.sharedMaxAge) || (maxStale != other.maxStale) ||
(maxStaleLimit != other.maxStaleLimit) || (minFresh != other.minFresh) ||
(noTransform != other.noTransform) || (onlyIfCached != other.onlyIfCached) ||
(publicField != other.publicField) || (privateField != other.privateField) ||
(mustRevalidate != other.mustRevalidate) || (proxyRevalidate != other.proxyRevalidate))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(noCacheHeaders, other.noCacheHeaders,
HeaderUtilities.CaseInsensitiveStringComparer))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(privateHeaders, other.privateHeaders,
HeaderUtilities.CaseInsensitiveStringComparer))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(extensions, other.extensions))
{
return(false);
}
return(true);
}
public override bool Equals(object obj)
{
CacheControlHeaderValue other = obj as CacheControlHeaderValue;
if (other == null)
{
return(false);
}
if ((_noCache != other._noCache) || (_noStore != other._noStore) || (_maxAge != other._maxAge) ||
(_sharedMaxAge != other._sharedMaxAge) || (_maxStale != other._maxStale) ||
(_maxStaleLimit != other._maxStaleLimit) || (_minFresh != other._minFresh) ||
(_noTransform != other._noTransform) || (_onlyIfCached != other._onlyIfCached) ||
(_publicField != other._publicField) || (_privateField != other._privateField) ||
(_mustRevalidate != other._mustRevalidate) || (_proxyRevalidate != other._proxyRevalidate))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(_noCacheHeaders, other._noCacheHeaders,
StringComparer.OrdinalIgnoreCase))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(_privateHeaders, other._privateHeaders,
StringComparer.OrdinalIgnoreCase))
{
return(false);
}
if (!HeaderUtilities.AreEqualCollections(_extensions, other._extensions))
{
return(false);
}
return(true);
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
throw new NotImplementedException();
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
parsedValue = null;
if (input == null)
{
return(true);
}
var value = new CacheControlHeaderValue();
var lexer = new Lexer(input);
Token t;
do
{
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
string s = lexer.GetStringValue(t);
bool token_read = false;
TimeSpan?ts;
switch (s)
{
case "no-store":
value.NoStore = true;
break;
case "no-transform":
value.NoTransform = true;
break;
case "only-if-cached":
value.OnlyIfCached = true;
break;
case "public":
value.Public = true;
break;
case "must-revalidate":
value.MustRevalidate = true;
break;
case "proxy-revalidate":
value.ProxyRevalidate = true;
break;
case "max-stale":
value.MaxStale = true;
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
value.MaxStaleLimit = ts;
break;
case "max-age":
case "s-maxage":
case "min-fresh":
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
return(false);
}
t = lexer.Scan();
if (t != Token.Type.Token)
{
return(false);
}
ts = lexer.TryGetTimeSpanValue(t);
if (ts == null)
{
return(false);
}
switch (s.Length)
{
case 7:
value.MaxAge = ts;
break;
case 8:
value.SharedMaxAge = ts;
break;
default:
value.MinFresh = ts;
break;
}
break;
case "private":
case "no-cache":
if (s.Length == 7)
{
value.Private = true;
}
else
{
value.NoCache = true;
}
t = lexer.Scan();
if (t != Token.Type.SeparatorEqual)
{
token_read = true;
break;
}
t = lexer.Scan();
if (t != Token.Type.QuotedString)
{
return(false);
}
foreach (var entry in lexer.GetQuotedStringValue(t).Split(','))
{
var qs = entry.Trim('\t', ' ');
if (s.Length == 7)
{
value.PrivateHeaders.Add(qs);
}
else
{
value.NoCache = true;
value.NoCacheHeaders.Add(qs);
}
}
break;
default:
string name = lexer.GetStringValue(t);
string svalue = null;
t = lexer.Scan();
if (t == Token.Type.SeparatorEqual)
{
t = lexer.Scan();
switch (t.Kind)
{
case Token.Type.Token:
case Token.Type.QuotedString:
svalue = lexer.GetStringValue(t);
break;
default:
return(false);
}
}
else
{
token_read = true;
}
value.Extensions.Add(NameValueHeaderValue.Create(name, svalue));
break;
}
if (!token_read)
{
t = lexer.Scan();
}
} while (t == Token.Type.SeparatorComma);
if (t != Token.Type.End)
{
return(false);
}
parsedValue = value;
return(true);
}
public static bool TryParse(string input, out CacheControlHeaderValue parsedValue)
{
}
private static bool TrySetCacheControlValues(CacheControlHeaderValue cc,
List <NameValueHeaderValue> nameValueList)
{
foreach (NameValueHeaderValue nameValue in nameValueList)
{
bool success = true;
string name = nameValue.Name.ToLowerInvariant();
switch (name)
{
case noCacheString:
success = TrySetOptionalTokenList(nameValue, ref cc._noCache, ref cc._noCacheHeaders);
break;
case noStoreString:
success = TrySetTokenOnlyValue(nameValue, ref cc._noStore);
break;
case maxAgeString:
success = TrySetTimeSpan(nameValue, ref cc._maxAge);
break;
case maxStaleString:
success = ((nameValue.Value == null) || TrySetTimeSpan(nameValue, ref cc._maxStaleLimit));
if (success)
{
cc._maxStale = true;
}
break;
case minFreshString:
success = TrySetTimeSpan(nameValue, ref cc._minFresh);
break;
case noTransformString:
success = TrySetTokenOnlyValue(nameValue, ref cc._noTransform);
break;
case onlyIfCachedString:
success = TrySetTokenOnlyValue(nameValue, ref cc._onlyIfCached);
break;
case publicString:
success = TrySetTokenOnlyValue(nameValue, ref cc._publicField);
break;
case privateString:
success = TrySetOptionalTokenList(nameValue, ref cc._privateField, ref cc._privateHeaders);
break;
case mustRevalidateString:
success = TrySetTokenOnlyValue(nameValue, ref cc._mustRevalidate);
break;
case proxyRevalidateString:
success = TrySetTokenOnlyValue(nameValue, ref cc._proxyRevalidate);
break;
case sharedMaxAgeString:
success = TrySetTimeSpan(nameValue, ref cc._sharedMaxAge);
break;
default:
cc.Extensions.Add(nameValue); // success is always true
break;
}
if (!success)
{
return(false);
}
}
return(true);
}
internal static int GetCacheControlLength(string input, int startIndex, CacheControlHeaderValue storeValue, out CacheControlHeaderValue parsedValue)
{
}
