private void AddToCache(string resource, HttpResponseMessage response)
{
// Reads the cache-control header from the response
var cacheHeader = response.Headers.FirstOrDefault(h => h.Key.Equals("cache-control", StringComparison.OrdinalIgnoreCase));
if (string.IsNullOrEmpty(cacheHeader.Key))
{
return;
}
// Parses the cache-control value and extracts maxage from it
var maxAge = CacheControlHeaderValue.Parse(cacheHeader.Value.FirstOrDefault()).MaxAge;
if (maxAge.HasValue)
{
// Adds the response to the cache if it has a max-age value
_cache.Add(key: resource, value: response, ttl: maxAge.Value);
}
}
public void Equals_CompareCollectionFieldsSet_MatchExpectation()
{
CacheControlHeaderValue cacheControl1 = new CacheControlHeaderValue();
CacheControlHeaderValue cacheControl2 = new CacheControlHeaderValue();
CacheControlHeaderValue cacheControl3 = new CacheControlHeaderValue();
CacheControlHeaderValue cacheControl4 = new CacheControlHeaderValue();
CacheControlHeaderValue cacheControl5 = new CacheControlHeaderValue();
CacheControlHeaderValue cacheControl6 = new CacheControlHeaderValue();
cacheControl1.NoCache = true;
cacheControl1.NoCacheHeaders.Add("token2");
Assert.False(cacheControl1.Equals(null), "Compare with 'null'");
cacheControl2.NoCache = true;
cacheControl2.NoCacheHeaders.Add("token1");
cacheControl2.NoCacheHeaders.Add("token2");
CompareValues(cacheControl1, cacheControl2, false);
cacheControl1.NoCacheHeaders.Add("token1");
CompareValues(cacheControl1, cacheControl2, true);
// Since NoCache and Private generate different hash codes, even if NoCacheHeaders and PrivateHeaders
// have the same values, the hash code will be different.
cacheControl3.Private = true;
cacheControl3.PrivateHeaders.Add("token2");
CompareValues(cacheControl1, cacheControl3, false);
cacheControl4.Private = true;
cacheControl4.PrivateHeaders.Add("token3");
CompareValues(cacheControl3, cacheControl4, false);
cacheControl5.Extensions.Add(new NameValueHeaderValue("custom"));
CompareValues(cacheControl1, cacheControl5, false);
cacheControl6.Extensions.Add(new NameValueHeaderValue("customN", "customV"));
cacheControl6.Extensions.Add(new NameValueHeaderValue("custom"));
CompareValues(cacheControl5, cacheControl6, false);
cacheControl5.Extensions.Add(new NameValueHeaderValue("customN", "customV"));
CompareValues(cacheControl5, cacheControl6, true);
}
public void GetCacheControlLength_DifferentValidScenariosAndNoExistingCacheControl_AllReturnNonZero()
{
CacheControlHeaderValue expected = new CacheControlHeaderValue();
expected.NoCache = true;
CheckGetCacheControlLength("X , , no-cache ,,", 1, null, 16, expected);
expected = new CacheControlHeaderValue();
expected.NoCache = true;
expected.NoCacheHeaders.Add("token1");
expected.NoCacheHeaders.Add("token2");
CheckGetCacheControlLength("no-cache=\"token1, token2\"", 0, null, 25, expected);
expected = new CacheControlHeaderValue();
expected.NoStore = true;
expected.MaxAge = new TimeSpan(0, 0, 125);
expected.MaxStale = true;
CheckGetCacheControlLength("X no-store , max-age = 125, max-stale,", 1, null, 37, expected);
expected = new CacheControlHeaderValue();
expected.MinFresh = new TimeSpan(0, 0, 123);
expected.NoTransform = true;
expected.OnlyIfCached = true;
expected.Extensions.Add(new NameValueHeaderValue("custom"));
CheckGetCacheControlLength("min-fresh=123, no-transform, only-if-cached, custom", 0, null, 51, expected);
expected = new CacheControlHeaderValue();
expected.Public = true;
expected.Private = true;
expected.PrivateHeaders.Add("token1");
expected.MustRevalidate = true;
expected.ProxyRevalidate = true;
expected.Extensions.Add(new NameValueHeaderValue("c", "d"));
expected.Extensions.Add(new NameValueHeaderValue("a", "b"));
CheckGetCacheControlLength(",public, , private=\"token1\", must-revalidate, c=d, proxy-revalidate, a=b", 0,
null, 72, expected);
expected = new CacheControlHeaderValue();
expected.Private = true;
expected.SharedMaxAge = new TimeSpan(0, 0, 1234567890);
expected.MaxAge = new TimeSpan(0, 0, 987654321);
CheckGetCacheControlLength("s-maxage=1234567890, private, max-age = 987654321,", 0, null, 50, expected);
}
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
});
}
public CacheControl(HttpCachedClient parent, HttpResponseMessage response)
{
var headers = response.Headers;
var contentHeaders = response.Content.Headers;
Date = headers.Date ?? DateTimeOffset.UtcNow;
Value = headers.CacheControl ?? CacheControlHeaderValue.Parse(headers.Pragma.ToString());
ShouldCache = Value.Public || (Value.Private && parent.Shared) || !Value.NoStore;
// 4.2.1. Calculating Freshness Lifetime
FreshnessLifetime = parent.Shared && Value.SharedMaxAge != null && Value.SharedMaxAge.Value.TotalSeconds != 0 ? Value.SharedMaxAge
: Value.MaxAge != null && Value.MaxAge.Value.TotalSeconds != 0 ? Value.MaxAge
: contentHeaders.Expires != null ? (TimeSpan?)contentHeaders.Expires.Value.Subtract(Date)
: contentHeaders.LastModified != null ? (TimeSpan?)TimeSpan.FromSeconds(contentHeaders.LastModified.Value.Subtract(Date).TotalSeconds / 10)
: null;
Validation = !Value.NoCache && (Value.MaxAge == null || Value.MaxAge.Value.TotalSeconds != 0) ? (Func <Func <Task <HttpResponseMessage> >, HttpRequestMessage, Task <HttpResponseMessage> >)null
: headers.ETag != null ? (b, r) => IfNoneMatch(b, r, headers.ETag)
: contentHeaders.LastModified != null ? (b, r) => IfModifiedSince(b, r, contentHeaders.LastModified.Value)
: (Func <Func <Task <HttpResponseMessage> >, HttpRequestMessage, Task <HttpResponseMessage> >)null;
}
/// <summary>
/// Converts a <see cref="HttpResponseMessage"/> to an <see cref="HttpResponseBase"/> and disposes the
/// <see cref="HttpResponseMessage"/> and <see cref="HttpRequestMessage"/> upon completion.
/// </summary>
/// <param name="httpContextBase">The HTTP context base.</param>
/// <param name="response">The response to convert.</param>
/// <param name="request">The request (which will be disposed).</param>
/// <returns>A <see cref="Task"/> representing the conversion of an <see cref="HttpResponseMessage"/> to an <see cref="HttpResponseBase"/>
/// including writing out any entity body.</returns>
internal static Task ConvertResponse(HttpContextBase httpContextBase, HttpResponseMessage response, HttpRequestMessage request)
{
Contract.Assert(httpContextBase != null);
Contract.Assert(request != null);
// A null response creates a 500 with no content
if (response == null)
{
CreateEmptyErrorResponse(httpContextBase.Response);
return(TaskHelpers.Completed());
}
CopyResponseStatusAndHeaders(httpContextBase, response);
CacheControlHeaderValue cacheControl = response.Headers.CacheControl;
// TODO 335085: Consider this when coming up with our caching story
if (cacheControl == null)
{
// DevDiv2 #332323. ASP.NET by default always emits a cache-control: private header.
// However, we don't want requests to be cached by default.
// If nobody set an explicit CacheControl then explicitly set to no-cache to override the
// default behavior. This will cause the following response headers to be emitted:
// Cache-Control: no-cache
// Pragma: no-cache
// Expires: -1
httpContextBase.Response.Cache.SetCacheability(HttpCacheability.NoCache);
}
// Asynchronously write the response body. If there is no body, we use
// a completed task to share the Finally() below.
// The response-writing task will not fault -- it handles errors internally.
Task writeResponseContentTask = (response.Content == null)
? TaskHelpers.Completed()
: WriteResponseContentAsync(httpContextBase, response, request);
return(writeResponseContentTask.Finally(() =>
{
request.DisposeRequestResources();
request.Dispose();
response.Dispose();
}));
}
/// <summary>
/// Sets the 'Cache-Control' header to 'no-cache, no-store' and 'Pragma' header to 'no-cache' overriding any user set value.
/// </summary>
/// <param name="httpContext">The <see cref="HttpContext"/>.</param>
protected virtual void SetDoNotCacheHeaders(HttpContext httpContext)
{
var logWarning = false;
var responseHeaders = httpContext.Response.Headers;
if (responseHeaders.TryGetValue(HeaderNames.CacheControl, out var cacheControlHeader) &&
CacheControlHeaderValue.TryParse(cacheControlHeader.ToString(), out var cacheControlHeaderValue))
{
// If the Cache-Control is already set, override it only if required
if (!cacheControlHeaderValue.NoCache || !cacheControlHeaderValue.NoStore)
{
logWarning = true;
responseHeaders.CacheControl = "no-cache, no-store";
}
}
else
{
responseHeaders.CacheControl = "no-cache, no-store";
}
if (responseHeaders.TryGetValue(HeaderNames.Pragma, out var pragmaHeader) && pragmaHeader.Count > 0)
{
// If the Pragma is already set, override it only if required
if (!string.Equals(pragmaHeader[0], "no-cache", StringComparison.OrdinalIgnoreCase))
{
logWarning = true;
httpContext.Response.Headers.Pragma = "no-cache";
}
}
else
{
httpContext.Response.Headers.Pragma = "no-cache";
}
// Since antiforgery token generation is not very obvious to the end users (ex: MVC's form tag generates them
// by default), log a warning to let users know of the change in behavior to any cache headers they might
// have set explicitly.
if (logWarning)
{
_logger.ResponseCacheHeadersOverridenToNoCache();
}
}
static Util()
{
utf8Encoding = new UTF8Encoding(false);
lastTimeStamp = DateTime.UtcNow.Ticks;
xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.Encoding = utf8Encoding;
xmlWriterSettings.NamespaceHandling = NamespaceHandling.OmitDuplicates;
xmlWriterSettingsFragment = new XmlWriterSettings();
xmlWriterSettingsFragment.Encoding = utf8Encoding;
xmlWriterSettingsFragment.NamespaceHandling = NamespaceHandling.OmitDuplicates;
xmlWriterSettingsFragment.ConformanceLevel = ConformanceLevel.Fragment;
xmlReaderSettings = new XmlReaderSettings();
xmlReaderSettings.IgnoreWhitespace = true;
xmlReaderSettings.CheckCharacters = false;
xmlParserContext = new XmlParserContext(null, null, "en", XmlSpace.Default, utf8Encoding);
noCacheCtrl = new CacheControlHeaderValue {
NoCache = true, NoStore = true
};
iso8601DateFormats = new string[] {
"yyyy-MM-ddTHH:mm:ss.FFFzzz",
"yyyy-MM-ddTHH:mm:ss.FFFzz",
"yyyy-MM-ddTHH:mm:ss.FFFZ",
"yyyy-MM-ddTHH:mm:ss.FFFFZ",
"yyyy-MM-ddTHH:mm:ss.FFFFFZ",
"yyyy-MM-ddTHH:mm:ss.FFFFFFZ",
"yyyy-MM-ddTHH:mm:ss.FFFFFFFZ",
// Extended formats
"yyyy-MM-ddTHH:mm:sszzz",
"yyyy-MM-ddTHH:mm:sszz",
"yyyy-MM-ddTHH:mm:ssZ",
// All of the above with reduced accuracy
"yyyy-MM-ddTHH:mmzzz",
"yyyy-MM-ddTHH:mmzz",
"yyyy-MM-ddTHH:mmZ",
};
}
internal static void HandleEtag(HttpContext httpContext, string calculatedEtag)
{
if (httpContext.Request.Headers.TryGetValue(HeaderNames.IfNoneMatch, out var etag) && Ccf.Ck.Utilities.Generic.Utilities.WithQuotes(calculatedEtag) == etag)
{
//there is etag and it is equal
httpContext.Response.StatusCode = StatusCodes.Status304NotModified;
return;
}
else
{
//there is NO etag OR it is NOT equal
}
CacheControlHeaderValue cacheControlHeaderValue = new CacheControlHeaderValue();
cacheControlHeaderValue.MaxAge = TimeSpan.FromDays(365);
cacheControlHeaderValue.Public = true;
httpContext.Response.GetTypedHeaders().CacheControl = cacheControlHeaderValue;
httpContext.Response.Headers.Add(HeaderNames.ETag, new[] { Ccf.Ck.Utilities.Generic.Utilities.WithQuotes(calculatedEtag) });
}
private static void NoCacheHeaders(ActionExecutedContext context)
{
var headerCache = new CacheControlHeaderValue()
{
NoCache = true
};
context.HttpContext.Response.Headers.Add("Cache-Control", headerCache.ToString());
StringValues dateValue;
context.HttpContext.Response.Headers.TryGetValue("Date", out dateValue);
if (string.IsNullOrEmpty(dateValue))
{
context.HttpContext.Response.Headers.Add("Date", DateTimeOffset.UtcNow.ToString());
}
context.HttpContext.Response.Headers.Add("Expires", DateTimeOffset.UtcNow.ToString());
}
public CDOSession(CDOSessionOptions options)
{
Options = options;
Instance = this; //used by cdo when no session object is passed
//init httpclient
HttpClient = new HttpClient(new HttpClientHandler()
{
AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip
});
//HttpClient = new HttpClient(new HttpClientHandler() { SslProtocols = _options.SslProtocols }); //this is not supported in older frameworks & problematic in Outlook VSTO
ServicePointManager.SecurityProtocol = Options.SecurityProtocol;
HttpClient.DefaultRequestHeaders.ConnectionClose = false;
HttpClient.DefaultRequestHeaders.CacheControl = CacheControlHeaderValue.Parse("no-cache");
HttpClient.DefaultRequestHeaders.Pragma.Add(NameValueHeaderValue.Parse("no-cache"));
HttpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
Task.Factory.StartNew(() =>
NetworkChange.NetworkAvailabilityChanged += NetworkChange_NetworkAvailabilityChanged).Wait();
}
public HttpCacheControlPolicyAttribute(bool isPrivate,
int maxAgeInSeconds,
bool mustRevalidate = true,
bool noCache = false,
bool noTransform = false,
bool nostore = false)
: this()
{
// copy values to the header
_cacheControl = new CacheControlHeaderValue()
{
Private = isPrivate,
Public = !isPrivate,
MustRevalidate = mustRevalidate,
MaxAge = TimeSpan.FromSeconds(maxAgeInSeconds),
NoCache = noCache,
NoTransform = noTransform,
NoStore = nostore
};
}
/// <summary>
/// Applies the <see cref="CachePolicy"/> <c>MaxAge</c> value to the given <paramref name="response"/>.
/// </summary>
/// <param name="response">The current <see cref="HttpResponseMessage"/>.</param>
protected virtual void SetMaxAge(HttpResponseMessage response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
if (this.Policy.MaxAge.HasValue)
{
CacheControlHeaderValue cacheControl = response.Headers.CacheControl ?? new CacheControlHeaderValue();
cacheControl.MaxAge = this.Policy.MaxAge;
response.Headers.CacheControl = cacheControl;
// If there is an HTTP response content then set Expires header field
if (response.Content != null)
{
response.Content.Headers.Expires = DateTimeOffset.UtcNow + this.Policy.MaxAge.Value;
}
}
}
private void ApplyCacheHeaders(HttpResponseMessage response, CacheTime cacheTime)
{
if (cacheTime.ClientTimeSpan > TimeSpan.Zero || MustRevalidate)
{
var cachecontrol = new CacheControlHeaderValue
{
MaxAge = cacheTime.ClientTimeSpan,
MustRevalidate = MustRevalidate
};
response.Headers.CacheControl = cachecontrol;
}
else if (NoCache)
{
response.Headers.CacheControl = new CacheControlHeaderValue {
NoCache = true
};
response.Headers.Add("Pragma", "no-cache");
}
}
public void ToString_NegativeValues_UsesMinusSignRegardlessOfCurrentCulture()
{
RemoteExecutor.Invoke(() =>
{
var cacheControl = new CacheControlHeaderValue()
{
MaxAge = new TimeSpan(0, 0, -1),
MaxStale = true,
MaxStaleLimit = new TimeSpan(0, 0, -2),
MinFresh = new TimeSpan(0, 0, -3),
SharedMaxAge = new TimeSpan(0, 0, -4)
};
var ci = (CultureInfo)CultureInfo.CurrentCulture.Clone();
ci.NumberFormat.NegativeSign = "n";
CultureInfo.CurrentCulture = ci;
Assert.Equal("max-age=-1, s-maxage=-4, max-stale=-2, min-fresh=-3", cacheControl.ToString());
}).Dispose();
}
public void Parse_Invalid()
{
try {
CacheControlHeaderValue.Parse("audio/");
Assert.Fail("#1");
} catch (FormatException) {
}
try {
CacheControlHeaderValue.Parse("max-age=");
Assert.Fail("#2");
} catch (FormatException) {
}
try {
CacheControlHeaderValue.Parse("me=");
Assert.Fail("#3");
} catch (FormatException) {
}
}
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 void ConfigureHttpClient(NexusNodeEndpoint endpoint)
{
if (_client == null)
{
throw new NullReferenceException("Http client is null");
}
if (endpoint == null)
{
throw new ArgumentException("Parameters are missing");
}
if (string.IsNullOrWhiteSpace(endpoint.Url))
{
throw new ArgumentException("URL is missing");
}
if (string.IsNullOrWhiteSpace(endpoint.Username))
{
throw new ArgumentException("Username is missing");
}
if (string.IsNullOrWhiteSpace(endpoint.Password))
{
throw new ArgumentException("Password is missing");
}
var uriResult = Uri.TryCreate(endpoint.Url, UriKind.Absolute, out var baseUri) &&
(baseUri.Scheme == Uri.UriSchemeHttp || baseUri.Scheme == Uri.UriSchemeHttps);
if (!uriResult)
{
throw new Exception("Url is not valid");
}
var auth64 = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{endpoint.Username}:{endpoint.Password}"));
_client.BaseAddress = baseUri;
_client.DefaultRequestHeaders.Authorization = AuthenticationHeaderValue.Parse($"Basic {auth64}");
_client.DefaultRequestHeaders.CacheControl = CacheControlHeaderValue.Parse("no-cache");
}
public void InitClient(CookieContainer cookieContainer)
{
if (client != null)
{
client.Dispose();
}
if (Device.RuntimePlatform == Device.Android ||
Device.RuntimePlatform == Device.iOS)
{
var cookies = cookieContainer.List();
cookieHandler = new NativeCookieHandler();
cookieHandler.SetCookies(cookieContainer.List());
handler = new NativeMessageHandler(false, false, cookieHandler)
{
AllowAutoRedirect = true,
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
};
}
else
{
handler = new HttpClientHandler
{
CookieContainer = cookieContainer,
AllowAutoRedirect = true,
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
};
}
client = new HttpClient(handler)
{
Timeout = TimeSpan.FromSeconds(timeout_in_seconds),
DefaultRequestHeaders =
{
CacheControl = CacheControlHeaderValue.Parse("no-cache, must-revalidate"),
}
};
client.DefaultRequestHeaders.UserAgent.ParseAdd("Tatoeba.Mobile/1.1");
}
private void AddToCache(string resource, HttpResponseMessage response)
{
var cacheHeader = response
.Headers
.FirstOrDefault(h => h.Key == "cache-control");
if (string.IsNullOrEmpty(cacheHeader.Key))
{
return;
}
var maxAge =
CacheControlHeaderValue
.Parse(cacheHeader.Value.ToString())
.MaxAge;
if (maxAge.HasValue)
{
_cache.Add(key: resource, value: response, ttl: maxAge.Value);
}
}
public static async Task <string> Get(string url, IEnumerable <KeyValuePair <string, string> > header = null, bool isBrowser = false)
{
try
{
var handler = new HttpClientHandler()
{
UseCookies = false
};
HttpClient hc = new HttpClient(handler);
CacheControlHeaderValue cacheControl = new CacheControlHeaderValue();
cacheControl.NoCache = true;
cacheControl.NoStore = true;
hc.DefaultRequestHeaders.CacheControl = cacheControl;
if (isBrowser)
{
hc.DefaultRequestHeaders.Add("user-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36 Qiyu/2.1.1.1");
}
else
{
hc.DefaultRequestHeaders.Add("user-Agent", "asusrouter-Android-DUTUtil-1.0.0.108");
}
hc.DefaultRequestHeaders.Add("Cookie", Cookie);
if (header != null)
{
foreach (var item in header)
{
hc.DefaultRequestHeaders.Add(item.Key, item.Value);
}
}
var res = await hc.GetAsync(url);
var json = await res.Content.ReadAsStringAsync();
return(json);
}
catch (Exception e)
{
return(null);
}
}
public void Should_return_Stale_header_if_stale_by_max_age()
{
// Arrange
var cacheControl = new CacheControlHeaderValue
{
MaxStale = true,
MaxStaleLimit = TimeSpan.FromSeconds(15),
MinFresh = TimeSpan.FromSeconds(20)
};
var cacheItem = new WebApiCacheItem
{
CreatedTime = DateTime.UtcNow.AddSeconds(-11),
MaxAge = 10,
StaleWhileRevalidate = 5,
IgnoreRevalidationRequest = true,
ResponseCharSet = "UTF8",
ResponseMediaType = "text/json",
Content = new byte[0],
Key = "CacheKey" + Guid.NewGuid()
};
Global.Cache.PhoenixFireCage[cacheItem.Key] = new Phoenix(NSubstitute.Substitute.For <_IInvocation>(), new CacheItem());
var request = UnitTestHelper.GetMessage();
var svc = new CacheResponseBuilder {
};
// Action
var response = svc.GetResponse(cacheControl, cacheItem, request);
// Assert
Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);
Assert.AreEqual("Cache freshness lifetime not qualified", response.Headers.GetValues("X-Flatwhite-Warning").First());
Assert.AreEqual("Response is Stale", response.Headers.GetValues("X-Flatwhite-Warning").Last());
Assert.AreEqual($"110 - \"Response is Stale\"", response.Headers.GetValues("Warning").Last());
Assert.AreEqual("stale-while-revalidate", response.Headers.CacheControl.Extensions.ToList().First().Name);
Assert.AreEqual(cacheItem.ResponseMediaType, response.Content.Headers.ContentType.MediaType);
Assert.AreEqual(cacheItem.ResponseCharSet, response.Content.Headers.ContentType.CharSet);
}
private async Task <HttpResponseInfo> MakeHttpRequest(HttpRequestInfo requestInfo)
{
SendingRemoteHttpRequestEventArgs eventArgs = new SendingRemoteHttpRequestEventArgs(null, requestInfo.RequestBody);
this.OnSendingRemoteHttpRequest(eventArgs);
HttpMethod method = new HttpMethod(requestInfo.HttpMethod);
HttpRequestMessage requestMessage = new HttpRequestMessage(method, requestInfo.FullUri);
if (requestInfo.HttpMethod == CommandInfo.GetCommand)
{
CacheControlHeaderValue cacheControlHeader = new CacheControlHeaderValue();
cacheControlHeader.NoCache = true;
requestMessage.Headers.CacheControl = cacheControlHeader;
}
if (requestInfo.HttpMethod == CommandInfo.PostCommand)
{
MediaTypeWithQualityHeaderValue acceptHeader = new MediaTypeWithQualityHeaderValue(JsonMimeType);
acceptHeader.CharSet = Utf8CharsetType;
requestMessage.Headers.Accept.Add(acceptHeader);
byte[] bytes = Encoding.UTF8.GetBytes(eventArgs.RequestBody);
requestMessage.Content = new ByteArrayContent(bytes, 0, bytes.Length);
MediaTypeHeaderValue contentTypeHeader = new MediaTypeHeaderValue(JsonMimeType);
contentTypeHeader.CharSet = Utf8CharsetType;
requestMessage.Content.Headers.ContentType = contentTypeHeader;
}
HttpResponseMessage responseMessage = await this.client.SendAsync(requestMessage);
HttpResponseInfo httpResponseInfo = new HttpResponseInfo();
httpResponseInfo.Body = await responseMessage.Content.ReadAsStringAsync();
httpResponseInfo.ContentType = responseMessage.Content.Headers.ContentType.ToString();
httpResponseInfo.StatusCode = responseMessage.StatusCode;
return(httpResponseInfo);
}
/// <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 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);
}
static HttpClient CreateAndConfigureHttpClient()
{
IWebBrowser webBrowser = new ChromiumWebBrowser(
Configurations.PathToChromiumExecutable,
Configurations.WorkingDirectory
);
var userAgentString = webBrowser.GetUserAgentString();
webBrowser.Dispose();
var httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Accept.ParseAdd("text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
httpClient.DefaultRequestHeaders.AcceptEncoding.ParseAdd("gzip, deflate, br");
httpClient.DefaultRequestHeaders.AcceptLanguage.ParseAdd("en-US,en;q=0.9");
httpClient.DefaultRequestHeaders.Upgrade.ParseAdd("1");
httpClient.DefaultRequestHeaders.Pragma.ParseAdd("no-cache");
httpClient.DefaultRequestHeaders.CacheControl = CacheControlHeaderValue.Parse("no-cache");
httpClient.DefaultRequestHeaders.UserAgent.ParseAdd(userAgentString);
httpClient.Timeout = Configurations.HttpRequestTimeout;
return(httpClient);
}
protected virtual void ApplyCacheHeaders(HttpResponseMessage response, CacheTime cacheTime)
{
if (cacheTime.ClientTimeSpan > TimeSpan.Zero || MustRevalidate || AllowedCacheLocation != AllowedCacheLocation.Undefined)
{
var cachecontrol = new CacheControlHeaderValue
{
MaxAge = cacheTime.ClientTimeSpan,
MustRevalidate = MustRevalidate,
Private = AllowedCacheLocation == AllowedCacheLocation.Private,
Public = AllowedCacheLocation == AllowedCacheLocation.Public
};
response.Headers.CacheControl = cachecontrol;
}
else if (NoCache)
{
response.Headers.CacheControl = new CacheControlHeaderValue {
NoCache = true
};
response.Headers.Add("Pragma", "no-cache");
}
}
public void ToString_UseRequestDirectiveValues_AllSerializedCorrectly()
{
CacheControlHeaderValue cacheControl = new CacheControlHeaderValue();
Assert.Equal("", cacheControl.ToString());
// Note that we allow all combinations of all properties even though the RFC specifies rules what value
// can be used together.
// Also for property pairs (bool property + collection property) like 'NoCache' and 'NoCacheHeaders' the
// caller needs to set the bool property in order for the collection to be populated as string.
// Cache Request Directive sample
cacheControl.NoStore = true;
Assert.Equal("no-store", cacheControl.ToString());
cacheControl.NoCache = true;
Assert.Equal("no-store, no-cache", cacheControl.ToString());
cacheControl.MaxAge = new TimeSpan(0, 1, 10);
Assert.Equal("no-store, no-cache, max-age=70", cacheControl.ToString());
cacheControl.MaxStale = true;
Assert.Equal("no-store, no-cache, max-age=70, max-stale", cacheControl.ToString());
cacheControl.MaxStaleLimit = new TimeSpan(0, 2, 5);
Assert.Equal("no-store, no-cache, max-age=70, max-stale=125", cacheControl.ToString());
cacheControl.MinFresh = new TimeSpan(0, 3, 0);
Assert.Equal("no-store, no-cache, max-age=70, max-stale=125, min-fresh=180", cacheControl.ToString());
cacheControl = new CacheControlHeaderValue();
cacheControl.NoTransform = true;
Assert.Equal("no-transform", cacheControl.ToString());
cacheControl.OnlyIfCached = true;
Assert.Equal("no-transform, only-if-cached", cacheControl.ToString());
cacheControl.Extensions.Add(new NameValueHeaderValue("custom"));
cacheControl.Extensions.Add(new NameValueHeaderValue("customName", "customValue"));
Assert.Equal("no-transform, only-if-cached, custom, customName=customValue", cacheControl.ToString());
cacheControl = new CacheControlHeaderValue();
cacheControl.Extensions.Add(new NameValueHeaderValue("custom"));
Assert.Equal("custom", cacheControl.ToString());
}
public void Equals_CompareValuesWithBoolFieldsSet_MatchExpectation()
{
// Verify that different bool fields return different hash values.
CacheControlHeaderValue[] values = new CacheControlHeaderValue[9];
for (int i = 0; i < values.Length; i++)
{
values[i] = new CacheControlHeaderValue();
}
values[0].ProxyRevalidate = true;
values[1].NoCache = true;
values[2].NoStore = true;
values[3].MaxStale = true;
values[4].NoTransform = true;
values[5].OnlyIfCached = true;
values[6].Public = true;
values[7].Private = true;
values[8].MustRevalidate = true;
// Only one bool field set. All hash codes should differ
for (int i = 0; i < values.Length; i++)
{
for (int j = 0; j < values.Length; j++)
{
if (i != j)
{
CompareValues(values[i], values[j], false);
}
}
}
// Validate that two instances with the same bool fields set are equal.
values[0].NoCache = true;
CompareValues(values[0], values[1], false);
values[1].ProxyRevalidate = true;
CompareValues(values[0], values[1], true);
}
/// <summary>
/// Sets whether an HTTP client is willing to accept a cached response.
/// </summary>
/// <param name="response">The response message.</param>
/// <returns>A <see cref="HttpResponseMessage"/> instance that represents a response message.</returns>
public static HttpResponseMessage SetNoCache(this HttpResponseMessage response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
CacheControlHeaderValue cc = response.Headers.CacheControl;
if (cc == null)
{
cc = new CacheControlHeaderValue();
response.Headers.CacheControl = cc;
}
// Google sample.
cc.NoCache = true;
cc.MaxAge = TimeSpan.Zero;
cc.NoStore = true;
cc.MustRevalidate = true;
return(response);
}