public void IsPreflight_ReturnsFalse(string httpMethod, string requestedMethod, string origin)
{
CorsRequestContext requestContext = new CorsRequestContext()
{
HttpMethod = httpMethod,
AccessControlRequestMethod = requestedMethod,
Origin = origin
};
Assert.False(requestContext.IsPreflight);
}
public void Default_Constructor()
{
CorsRequestContext requestContext = new CorsRequestContext();
Assert.Null(requestContext.AccessControlRequestMethod);
Assert.Null(requestContext.Host);
Assert.Null(requestContext.HttpMethod);
Assert.Null(requestContext.Origin);
Assert.Null(requestContext.RequestUri);
Assert.NotNull(requestContext.AccessControlRequestHeaders);
Assert.False(requestContext.IsPreflight);
}
public void EvaluatePolicy_EmptyOriginsPolicy_ReturnsInvalidResult()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy();
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.False(result.IsValid);
Assert.Contains("The origin 'foo' is not allowed.", result.ErrorMessages);
}
public void EvaluatePolicy_NoOrigin_ReturnsInvalidResult()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = null,
HttpMethod = "GET"
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, new CorsPolicy());
Assert.False(result.IsValid);
Assert.Contains("The request does not contain the Origin header.", result.ErrorMessages);
}
public void ToString_ReturnsThePropertyValues()
{
CorsRequestContext requestContext = new CorsRequestContext
{
Host = "http://example.com",
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "DELETE",
Origin = "http://localhost",
RequestUri = new Uri("http://example.com")
};
requestContext.AccessControlRequestHeaders.Add("foo");
requestContext.AccessControlRequestHeaders.Add("bar");
Assert.Equal(@"Origin: http://localhost, HttpMethod: OPTIONS, IsPreflight: True, Host: http://example.com, AccessControlRequestMethod: DELETE, RequestUri: http://example.com/, AccessControlRequestHeaders: {foo,bar}", requestContext.ToString());
}
public void EvaluatePolicy_AllowAnyOrigin_DoesNotSupportCredentials_EmitsWildcardForOrigin()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
SupportsCredentials = false
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.Equal("*", result.AllowedOrigin);
}
public void EvaluatePolicy_PreflightRequest_AnyMethod_ReturnsRequestMethod()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "GET",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy {
AllowAnyOrigin = true, AllowAnyMethod = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(1, result.AllowedMethods.Count);
Assert.Contains("GET", result.AllowedMethods);
}
public void EvaluatePolicy_Trace_ContainsHttpRequest()
{
// Arrange
HttpRequestMessage httpRequest = new HttpRequestMessage(
HttpMethod.Options,
"http://example.com/test"
);
httpRequest.Headers.Add("Origin", "foo");
CorsRequestContext corsRequestContext = httpRequest.GetCorsRequestContext();
Mock <ITraceWriter> traceWriterMock = new Mock <ITraceWriter>();
traceWriterMock
.Setup(
t =>
t.Trace(
httpRequest,
It.IsAny <string>(),
It.IsAny <TraceLevel>(),
It.IsAny <Action <TraceRecord> >()
)
)
.Verifiable();
Mock <ICorsEngine> corsEngineMock = new Mock <ICorsEngine>();
corsEngineMock
.Setup(engine => engine.EvaluatePolicy(corsRequestContext, It.IsAny <CorsPolicy>()))
.Returns(new CorsResult());
CorsEngineTracer tracer = new CorsEngineTracer(
corsEngineMock.Object,
traceWriterMock.Object
);
// Act
tracer.EvaluatePolicy(corsRequestContext, new CorsPolicy());
// Assert
traceWriterMock.Verify();
}
private Task <HttpResponseMessage> HandleCorsRequest(
HttpRequestMessage request,
CancellationToken cancellationToken,
CorsRequestContext corsRequestContext)
{
if (corsRequestContext.IsPreflight)
{
return(HandleCorsPreflightRequest(corsRequestContext));
}
return(base.Handle(request, cancellationToken)
.ContinueWith(responseTask =>
{
var response = responseTask.Result;
WriteCorsHeaders(response, corsRequestContext);
return response;
}));
}
public void EvaluatePolicy_PreflightRequest_OriginAllowed_ReturnsOrigin()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy {
AllowAnyMethod = true
};
policy.Origins.Add("foo");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal("foo", result.AllowedOrigin);
}
private static CorsRequestContext GetCorsRequestContext(IOwinContext context)
{
string origin = context.Request.Headers.Get(CorsConstants.Origin);
if (String.IsNullOrEmpty(origin))
{
//尝试从 Http Referer中获取
string refer = context.Request.Headers.Get(CorsConstants.Referer);
if (!string.IsNullOrEmpty(refer))
{
origin = CorsConstants.GetUriAddress(refer);
}
}
if (String.IsNullOrEmpty(origin))
{
return(null);
}
var requestContext = new CorsRequestContext
{
RequestUri = context.Request.Uri,
HttpMethod = context.Request.Method,
Host = context.Request.Host.Value,
Origin = origin,
AccessControlRequestMethod = context.Request.Headers.Get(CorsConstants.AccessControlRequestMethod)
};
IList <string> headerValues = context.Request.Headers.GetCommaSeparatedValues(CorsConstants.AccessControlRequestHeaders);
if (headerValues != null)
{
foreach (var header in headerValues)
{
requestContext.AccessControlRequestHeaders.Add(header);
}
}
return(requestContext);
}
/// <summary>
/// Gets the <see cref="CorsRequestContext"/> for a given request.
/// </summary>
/// <param name="request">The <see cref="HttpRequestMessage"/>.</param>
/// <returns>The <see cref="CorsRequestContext"/>.</returns>
/// <exception cref="System.ArgumentNullException">request</exception>
public static CorsRequestContext GetCorsRequestContext(this HttpRequestMessage request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
object corsRequestContext;
if (!request.Properties.TryGetValue(CorsRequestContextKey, out corsRequestContext))
{
if (!request.Headers.Contains(CorsConstants.Origin))
{
return(null);
}
CorsRequestContext requestContext = new CorsRequestContext
{
RequestUri = request.RequestUri,
HttpMethod = request.Method.Method,
Host = request.Headers.Host,
Origin = request.GetHeader(CorsConstants.Origin),
AccessControlRequestMethod = request.GetHeader(CorsConstants.AccessControlRequestMethod)
};
string allowAccessRequestHeaders = request.GetHeader(CorsConstants.AccessControlRequestHeaders);
if (allowAccessRequestHeaders != null)
{
IEnumerable <string> headerValues = allowAccessRequestHeaders.Split(',').Select(x => x.Trim());
foreach (string header in headerValues)
{
requestContext.AccessControlRequestHeaders.Add(header);
}
}
request.Properties.Add(CorsRequestContextKey, requestContext);
corsRequestContext = requestContext;
}
return((CorsRequestContext)corsRequestContext);
}
public CorsResult EvaluatePolicy(CorsRequestContext context, CorsPolicy policy)
{
var origin = context.Origin;
var domain = string.Empty;
// 匹配域名
foreach (var ori in policy.Origins)
{
if (RegexHelper.Match(origin, ori))
{
domain = origin;
break;
}
}
WildcardCorsResult result = new WildcardCorsResult(policy, context);
result.AllowedOrigin = domain;
return(result);
}
public void EvaluatePolicy_PreflightRequest_MethodAllowed_ReturnsAllowMethods()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy {
AllowAnyOrigin = true
};
policy.Methods.Add("PUT");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.NotNull(result);
Assert.Contains("PUT", result.AllowedMethods);
}
public void EvaluatePolicy_ManyExposedHeaders_HeadersAllowed()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext {
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy {
AllowAnyOrigin = true
};
policy.ExposedHeaders.Add("foo");
policy.ExposedHeaders.Add("bar");
policy.ExposedHeaders.Add("baz");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.Equal(3, result.AllowedExposedHeaders.Count());
Assert.Contains("foo", result.AllowedExposedHeaders);
Assert.Contains("bar", result.AllowedExposedHeaders);
Assert.Contains("baz", result.AllowedExposedHeaders);
}
public void EvaluatePolicy_PreflightRequest_PreflightMaxAge_PreflightMaxAgeSet()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
PreflightMaxAge = 10
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(10, result.PreflightMaxAge);
}
public void EvaluatePolicy_PreflightRequest_SupportsCredentials_AllowCredentialsReturnsTrue()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
SupportsCredentials = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.True(result.SupportsCredentials);
}
public void EvaluatePolicy_PreflightRequest_NoHeadersRequested_AllowedAllHeaders_ReturnsEmptyHeaders()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
AllowAnyHeader = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Empty(result.AllowedHeaders);
}
public void EvaluatePolicy_PreflightRequest_MethodNotAllowed_ReturnsInvalidResult()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy {
AllowAnyOrigin = true
};
policy.Methods.Add("GET");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.False(result.IsValid);
Assert.Contains("The method 'PUT' is not allowed.", result.ErrorMessages);
}
public CorsResult EvaluatePolicy(CorsRequestContext requestContext, CorsPolicy policy)
{
CorsResult corsResult = null;
object request;
requestContext.Properties.TryGetValue(typeof(HttpRequestMessage).FullName, out request);
_traceWriter.TraceBeginEnd(
request as HttpRequestMessage,
TraceCategories.CorsCategory,
TraceLevel.Info,
_innerCorsEngine.GetType().Name,
MethodName,
beginTrace: null,
execute: () =>
{
corsResult = _innerCorsEngine.EvaluatePolicy(requestContext, policy);
},
endTrace: (tr) =>
{
if (corsResult != null)
{
tr.Message = String.Format(
CultureInfo.CurrentCulture,
SRResources.TraceEndCorsResultReturned,
corsResult
);
}
else
{
tr.Message = SRResources.TraceEndNoCorsResultReturned;
}
},
errorTrace: null
);
return(corsResult);
}
public void EvaluatePolicy_PreflightRequest_ListedMethod_ReturnsSubsetOfListedMethods()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
policy.Methods.Add("PUT");
policy.Methods.Add("DELETE");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(1, result.AllowedMethods.Count());
Assert.Contains("PUT", result.AllowedMethods);
}
public async Task <CorsPolicy> GetCorsPolicyAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
{
CorsRequestContext corsRequestContext = request.GetCorsRequestContext();
string originRequested = corsRequestContext.Origin;
if (await IsOriginFromAPaidCustomer(originRequested))
{
// Grant CORS request
CorsPolicy policy = new CorsPolicy
{
AllowAnyHeader = true,
AllowAnyMethod = true,
};
policy.Origins.Add(originRequested);
return(policy);
}
else
{
// Reject CORS request
return(null);
}
}
/// <summary>
/// Evaluates and applies the CORS policy. Responses will be generated for preflight requests.
/// Requests that are permitted by the CORS policy will be passed onto the next middleware.
/// </summary>
/// <param name="environment"></param>
/// <returns></returns>
public async Task Invoke(IDictionary <string, object> environment)
{
IOwinContext context = new OwinContext(environment);
CorsRequestContext corsRequestContext = GetCorsRequestContext(context);
CorsPolicy policy = await _corsPolicyProvider.GetCorsPolicyAsync(context.Request);
if (policy != null && corsRequestContext != null)
{
if (corsRequestContext.IsPreflight)
{
await HandleCorsPreflightRequestAsync(context, policy, corsRequestContext);
}
else
{
await HandleCorsRequestAsync(context, policy, corsRequestContext);
}
}
else
{
await _next(environment);
}
}
private CorsRequestContext GetCorsRequestContext(
HttpRequestMessage request)
{
var origin = request.Headers.GetOrigin();
if (origin.IsNullOrEmpty())
{
return(null);
}
var context = new CorsRequestContext
{
RequestUri = request.RequestUri,
HttpMethod = request.Method.ToString(),
Host = request.Headers.Host,
Origin = origin,
AccessControlRequestMethod = request.Headers.GetAccessControlRequestMethod(),
};
context.SetAccessControlRequestHeaders(
request.Headers.GetAccessControlRequestHeaders());
return(context);
}
private async Task <HttpResponseMessage> HandleRequest(bool preflight,
CorsRequestContext requestContext, GraphiteCorsPolicy corsPolicy)
{
if (preflight && !_configuration.SupportedHttpMethods.Contains(
requestContext.AccessControlRequestMethod))
{
return(await FailRequest(corsPolicy, true));
}
var result = _corsEngine.EvaluatePolicy(requestContext, corsPolicy);
if (result == null || !result.IsValid)
{
return(await FailRequest(corsPolicy, preflight,
result?.ErrorMessages.Join(" ")));
}
var response = !preflight || corsPolicy.AllowOptionRequestsToPassThrough
? await BehaviorChain.InvokeNext()
: _requestMessage.CreateResponse();
response.WriteCorsHeaders(result);
return(response);
}
private void ProcessCors(OAuthValidateTokenRequestContext context)
{
var accessControlRequestMethodHeaders = context.Request.Headers.GetCommaSeparatedValues(CorsConstants.AccessControlRequestMethod);
var originHeaders = context.Request.Headers.GetCommaSeparatedValues(CorsConstants.Origin);
var accessControlRequestHeaders = context.Request.Headers.GetCommaSeparatedValues(CorsConstants.AccessControlRequestMethod);
var corsRequest = new CorsRequestContext
{
Host = context.Request.Host.Value,
HttpMethod = context.Request.Method,
Origin = originHeaders?.FirstOrDefault(),
RequestUri = context.Request.Uri,
AccessControlRequestMethod = accessControlRequestMethodHeaders?.FirstOrDefault()
};
if (accessControlRequestHeaders != null)
{
foreach (var header in context.Request.Headers.GetCommaSeparatedValues(CorsConstants.AccessControlRequestMethod))
{
corsRequest.AccessControlRequestHeaders.Add(header);
}
}
var engine = new CorsEngine();
if (corsRequest.IsPreflight)
{
try
{
// Make sure Access-Control-Request-Method is valid.
var test = new HttpMethod(corsRequest.AccessControlRequestMethod);
}
catch (ArgumentException)
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
context.SetError("Access Control Request Method Cannot Be Null Or Empty");
//context.RequestCompleted();
return;
}
catch (FormatException)
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
context.SetError("Invalid Access Control Request Method");
//context.RequestCompleted();
return;
}
var result = engine.EvaluatePolicy(corsRequest, _options.CorsPolicy);
if (!result.IsValid)
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
context.SetError(string.Join(" | ", result.ErrorMessages));
//context.RequestCompleted();
return;
}
WriteCorsHeaders(result, context);
}
else
{
var result = engine.EvaluatePolicy(corsRequest, _options.CorsPolicy);
if (result.IsValid)
{
WriteCorsHeaders(result, context);
}
}
}
public virtual ICorsPolicyProvider GetCorsPolicyProvider(HttpRequestMessage request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
CorsRequestContext corsRequestContext = request.GetCorsRequestContext();
HttpActionDescriptor actionDescriptor = null;
if (corsRequestContext.IsPreflight)
{
HttpRequestMessage targetRequest = new HttpRequestMessage(new HttpMethod(corsRequestContext.AccessControlRequestMethod), request.RequestUri);
request.RegisterForDispose(targetRequest);
try
{
foreach (var property in request.Properties)
{
// The RouteData and HttpContext from the preflight request properties contain information
// relevant to the preflight request and not the actual request, therefore we need to exclude them.
if (property.Key != HttpPropertyKeys.HttpRouteDataKey &&
property.Key != HttpContextBaseKey)
{
targetRequest.Properties.Add(property.Key, property.Value);
}
}
HttpConfiguration config = request.GetConfiguration();
if (config == null)
{
throw new InvalidOperationException(SRResources.NoConfiguration);
}
IHttpRouteData routeData = config.Routes.GetRouteData(request);
if (routeData == null)
{
// No route data found for selecting action with EnableCorsAttribute, thus no ICorsPolicyProvider is returned
// and let the CorsMessageHandler flow the request to the normal Web API pipeline.
return(null);
}
actionDescriptor = SelectAction(targetRequest, routeData, config);
}
catch
{
if (DefaultPolicyProvider != null)
{
return(DefaultPolicyProvider);
}
throw;
}
}
else
{
actionDescriptor = request.GetActionDescriptor();
}
return(GetCorsPolicyProvider(actionDescriptor));
}
public void EvaluatePolicy_PreflightRequest_ListedMethod_ReturnsSubsetOfListedMethods()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
policy.Methods.Add("PUT");
policy.Methods.Add("DELETE");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(1, result.AllowedMethods.Count());
Assert.Contains("PUT", result.AllowedMethods);
}
public void EvaluatePolicy_PreflightRequest_NoHeadersRequested_AllowedAllHeaders_ReturnsEmptyHeaders()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
AllowAnyHeader = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Empty(result.AllowedHeaders);
}
public void EvaluatePolicy_PreflightRequest_MethodAllowed_ReturnsAllowMethods()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
policy.Methods.Add("PUT");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.NotNull(result);
Assert.Contains("PUT", result.AllowedMethods);
}
/// <summary>
/// Handles the preflight request specified by CORS.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="corsRequestContext">The cors request context.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The <see cref="Task{HttpResponseMessage}"/></returns>
/// <exception cref="System.ArgumentNullException">
/// request
/// or
/// corsRequestContext
/// </exception>
public virtual async Task <HttpResponseMessage> HandleCorsPreflightRequestAsync(HttpRequestMessage request, CorsRequestContext corsRequestContext, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (request == null)
{
throw new ArgumentNullException("request");
}
if (corsRequestContext == null)
{
throw new ArgumentNullException("corsRequestContext");
}
CorsPolicy corsPolicy = await GetCorsPolicyAsync(request);
if (corsPolicy != null)
{
HttpResponseMessage response = null;
CorsResult result;
if (TryEvaluateCorsPolicy(corsRequestContext, corsPolicy, out result))
{
response = request.CreateResponse(HttpStatusCode.OK);
response.WriteCorsHeaders(result);
}
else
{
response = result != null?
request.CreateErrorResponse(HttpStatusCode.BadRequest, String.Join(" | ", result.ErrorMessages)) :
request.CreateResponse(HttpStatusCode.BadRequest);
}
return(response);
}
else
{
return(await base.SendAsync(request, cancellationToken));
}
}
public void EvaluatePolicy_SupportsCredentials_AllowCredentialsReturnsTrue()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
SupportsCredentials = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(result.SupportsCredentials);
}
public void EvaluatePolicy_PreflightRequest_PreflightMaxAge_PreflightMaxAgeSet()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
PreflightMaxAge = 10
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(10, result.PreflightMaxAge);
}
/// <summary>
/// Handles the actual CORS request.
/// </summary>
/// <param name="request">The <see cref="HttpRequestMessage"/>.</param>
/// <param name="corsRequestContext">The <see cref="CorsRequestContext"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>The <see cref="Task{HttpResponseMessage}"/>.</returns>
/// <exception cref="System.ArgumentNullException">
/// request
/// or
/// corsRequestContext
/// </exception>
public virtual async Task <HttpResponseMessage> HandleCorsRequestAsync(HttpRequestMessage request, CorsRequestContext corsRequestContext, CancellationToken cancellationToken)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (corsRequestContext == null)
{
throw new ArgumentNullException("corsRequestContext");
}
HttpResponseMessage response = await base.SendAsync(request, cancellationToken);
CorsPolicy corsPolicy = await GetCorsPolicyAsync(request, cancellationToken);
if (corsPolicy != null)
{
CorsResult result;
if (TryEvaluateCorsPolicy(corsRequestContext, corsPolicy, out result))
{
if (response != null)
{
response.WriteCorsHeaders(result);
}
}
}
return(response);
}
public void EvaluatePolicy_ManyExposedHeaders_HeadersAllowed()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
policy.ExposedHeaders.Add("foo");
policy.ExposedHeaders.Add("bar");
policy.ExposedHeaders.Add("baz");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.Equal(3, result.AllowedExposedHeaders.Count());
Assert.Contains("foo", result.AllowedExposedHeaders);
Assert.Contains("bar", result.AllowedExposedHeaders);
Assert.Contains("baz", result.AllowedExposedHeaders);
}
public void EvaluatePolicy_PreflightRequest_MethodNotAllowed_ReturnsInvalidResult()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
policy.Methods.Add("GET");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.False(result.IsValid);
Assert.Contains("The method 'PUT' is not allowed.", result.ErrorMessages);
}
public void EvaluatePolicy_PreflightRequest_OriginAllowed_ReturnsOrigin()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyMethod = true
};
policy.Origins.Add("foo");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal("foo", result.AllowedOrigin);
}
public void EvaluatePolicy_PreflightRequest_AnyMethod_ReturnsRequestMethod()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "GET",
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(1, result.AllowedMethods.Count);
Assert.Contains("GET", result.AllowedMethods);
}
private Task HandleCorsPreflightRequestAsync(IOwinContext context, CorsPolicy policy, CorsRequestContext corsRequestContext)
{
CorsResult result;
if (!String.IsNullOrEmpty(corsRequestContext.AccessControlRequestMethod) &&
TryEvaluateCorsPolicy(policy, corsRequestContext, out result))
{
context.Response.StatusCode = 200;
WriteCorsHeaders(context, result);
}
else
{
// We couldn't evaluate the cors policy so it's a bad request
context.Response.StatusCode = 400;
}
return(Task.FromResult(0));
}
public void EvaluatePolicy_NoExposedHeaders_NoAllowExposedHeaders()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.Empty(result.AllowedExposedHeaders);
}
public void EvaluatePolicy_PreflightRequest_HeadersRequested_NotAllHeaderMatches_ReturnsInvalidResult()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
requestContext.AccessControlRequestHeaders.Add("match");
requestContext.AccessControlRequestHeaders.Add("noMatch");
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true
};
policy.Headers.Add("match");
policy.Headers.Add("foo");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.False(result.IsValid);
Assert.Contains("The collection of headers 'match,noMatch' is not allowed.", result.ErrorMessages);
}
public WildcardCorsResult(CorsPolicy policy, CorsRequestContext context)
{
this.policy = policy;
this.context = context;
}
public void EvaluatePolicy_PreflightRequest_HeadersRequested_AllowSomeHeaders_ReturnsSubsetOfListedHeaders()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo"
};
requestContext.AccessControlRequestHeaders.Add("Content-Type");
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true
};
policy.Headers.Add("foo");
policy.Headers.Add("bar");
policy.Headers.Add("Content-Type");
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.Equal(1, result.AllowedHeaders.Count);
Assert.Contains("Content-Type", result.AllowedHeaders);
}
private bool TryEvaluateCorsPolicy(CorsPolicy policy, CorsRequestContext corsRequestContext, out CorsResult result)
{
result = _corsEngine.EvaluatePolicy(corsRequestContext, policy);
return(result != null && result.IsValid);
}
public void EvaluatePolicy_AllowAnyOrigin_SupportsCredentials_AddsSpecificOrigin()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
Origin = "foo"
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
SupportsCredentials = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.Equal("foo", result.AllowedOrigin);
}
/// <summary>
/// Handles the preflight request specified by CORS.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="corsRequestContext">The cors request context.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
/// <returns>The <see cref="Task{HttpResponseMessage}"/></returns>
/// <exception cref="System.ArgumentNullException">
/// request
/// or
/// corsRequestContext
/// </exception>
public virtual async Task <HttpResponseMessage> HandleCorsPreflightRequestAsync(HttpRequestMessage request, CorsRequestContext corsRequestContext, CancellationToken cancellationToken)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (corsRequestContext == null)
{
throw new ArgumentNullException("corsRequestContext");
}
try
{
// Make sure Access-Control-Request-Method is valid.
new HttpMethod(corsRequestContext.AccessControlRequestMethod);
}
catch (ArgumentException)
{
return(request.CreateErrorResponse(HttpStatusCode.BadRequest,
SRResources.AccessControlRequestMethodCannotBeNullOrEmpty));
}
catch (FormatException)
{
return(request.CreateErrorResponse(HttpStatusCode.BadRequest,
String.Format(CultureInfo.CurrentCulture,
SRResources.InvalidAccessControlRequestMethod,
corsRequestContext.AccessControlRequestMethod)));
}
CorsPolicy corsPolicy = await GetCorsPolicyAsync(request, cancellationToken);
if (corsPolicy != null)
{
HttpResponseMessage response = null;
CorsResult result;
if (TryEvaluateCorsPolicy(corsRequestContext, corsPolicy, out result))
{
response = request.CreateResponse(HttpStatusCode.OK);
response.WriteCorsHeaders(result);
}
else
{
response = result != null?
request.CreateErrorResponse(HttpStatusCode.BadRequest, String.Join(" | ", result.ErrorMessages)) :
request.CreateResponse(HttpStatusCode.BadRequest);
}
return(response);
}
else
{
return(await base.SendAsync(request, cancellationToken));
}
}
public void EvaluatePolicy_PreflightRequest_SupportsCredentials_AllowCredentialsReturnsTrue()
{
CorsEngine corsEngine = new CorsEngine();
CorsRequestContext requestContext = new CorsRequestContext
{
HttpMethod = "OPTIONS",
AccessControlRequestMethod = "PUT",
Origin = "foo",
};
CorsPolicy policy = new CorsPolicy
{
AllowAnyOrigin = true,
AllowAnyMethod = true,
SupportsCredentials = true
};
CorsResult result = corsEngine.EvaluatePolicy(requestContext, policy);
Assert.True(requestContext.IsPreflight);
Assert.True(result.SupportsCredentials);
}
