public void Constructor_WithPolicy_AddsTheGivenPolicy()
{
// Arrange
var originalPolicy = new CorsPolicy();
originalPolicy.Origins.Add("http://existing.com");
originalPolicy.Headers.Add("Existing");
originalPolicy.Methods.Add("GET");
originalPolicy.ExposedHeaders.Add("ExistingExposed");
originalPolicy.SupportsCredentials = true;
originalPolicy.PreflightMaxAge = TimeSpan.FromSeconds(12);
// Act
var builder = new CorsPolicyBuilder(originalPolicy);
// Assert
var corsPolicy = builder.Build();
Assert.False(corsPolicy.AllowAnyHeader);
Assert.False(corsPolicy.AllowAnyMethod);
Assert.False(corsPolicy.AllowAnyOrigin);
Assert.True(corsPolicy.SupportsCredentials);
Assert.NotSame(originalPolicy.Headers, corsPolicy.Headers);
Assert.Equal(originalPolicy.Headers, corsPolicy.Headers);
Assert.NotSame(originalPolicy.Methods, corsPolicy.Methods);
Assert.Equal(originalPolicy.Methods, corsPolicy.Methods);
Assert.NotSame(originalPolicy.Origins, corsPolicy.Origins);
Assert.Equal(originalPolicy.Origins, corsPolicy.Origins);
Assert.NotSame(originalPolicy.ExposedHeaders, corsPolicy.ExposedHeaders);
Assert.Equal(originalPolicy.ExposedHeaders, corsPolicy.ExposedHeaders);
Assert.Equal(TimeSpan.FromSeconds(12), corsPolicy.PreflightMaxAge);
}
/// <inheritdoc />
public CorsResult EvaluatePolicy(HttpContext context, CorsPolicy policy)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (policy == null)
{
throw new ArgumentNullException(nameof(policy));
}
var corsResult = new CorsResult();
var accessControlRequestMethod = context.Request.Headers[CorsConstants.AccessControlRequestMethod];
if (string.Equals(context.Request.Method, CorsConstants.PreflightHttpMethod, StringComparison.Ordinal) &&
!StringValues.IsNullOrEmpty(accessControlRequestMethod))
{
EvaluatePreflightRequest(context, policy, corsResult);
}
else
{
EvaluateRequest(context, policy, corsResult);
}
return corsResult;
}
public virtual void EvaluateRequest(HttpContext context, CorsPolicy policy, CorsResult result)
{
var origin = context.Request.Headers[CorsConstants.Origin];
if (StringValues.IsNullOrEmpty(origin) || !policy.AllowAnyOrigin && !policy.Origins.Contains(origin))
{
return;
}
AddOriginToResult(origin, policy, result);
result.SupportsCredentials = policy.SupportsCredentials;
AddHeaderValues(result.AllowedExposedHeaders, policy.ExposedHeaders);
}
/// <summary>
/// Adds a new policy.
/// </summary>
/// <param name="name">The name of the policy.</param>
/// <param name="policy">The <see cref="CorsPolicy"/> policy to be added.</param>
public void AddPolicy(string name, CorsPolicy policy)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
if (policy == null)
{
throw new ArgumentNullException(nameof(policy));
}
PolicyMap[name] = policy;
}
public void EvaluatePolicy_EmptyOriginsPolicy_ReturnsInvalidResult()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(origin: "http://example.com");
var policy = new CorsPolicy();
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Null(result.AllowedOrigin);
Assert.False(result.VaryByOrigin);
}
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection();
//Set up CORS
var policy = new CorsPolicy();
policy.Headers.Add("*");
policy.Methods.Add("*");
policy.Origins.Add("*");
policy.SupportsCredentials = true;
services.AddCors(x => x.AddPolicy("corsGlobalPolicy", policy));
}
public void Default_Constructor()
{
// Arrange & Act
var corsPolicy = new CorsPolicy();
// Assert
Assert.False(corsPolicy.AllowAnyHeader);
Assert.False(corsPolicy.AllowAnyMethod);
Assert.False(corsPolicy.AllowAnyOrigin);
Assert.False(corsPolicy.SupportsCredentials);
Assert.Empty(corsPolicy.ExposedHeaders);
Assert.Empty(corsPolicy.Headers);
Assert.Empty(corsPolicy.Methods);
Assert.Empty(corsPolicy.Origins);
Assert.Null(corsPolicy.PreflightMaxAge);
}
public void SettingNegativePreflightMaxAge_Throws()
{
// Arrange
var policy = new CorsPolicy();
// Act
var exception = Assert.Throws<ArgumentOutOfRangeException>(() =>
{
policy.PreflightMaxAge = TimeSpan.FromSeconds(-12);
});
// Assert
Assert.Equal(
$"PreflightMaxAge must be greater than or equal to 0.{Environment.NewLine}Parameter name: value",
exception.Message);
}
public void EvaluatePolicy_AllowAnyOrigin_DoesNotSupportCredentials_EmitsWildcardForOrigin()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(origin: "http://example.com");
var policy = new CorsPolicy
{
SupportsCredentials = false
};
policy.Origins.Add(CorsConstants.AnyOrigin);
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal("*", result.AllowedOrigin);
}
public async Task GetsNamedPolicy(string policyName)
{
// Arrange
var options = new CorsOptions();
var policy = new CorsPolicy();
options.AddPolicy(policyName, policy);
var corsOptions = new TestCorsOptions
{
Value = options
};
var policyProvider = new DefaultCorsPolicyProvider(corsOptions);
// Act
var actualPolicy = await policyProvider.GetPolicyAsync(new DefaultHttpContext(), policyName);
// Assert
Assert.Same(policy, actualPolicy);
}
public async Task PreFlight_MatchesPolicy_SetsResponseHeaders()
{
// Arrange
var policy = new CorsPolicy();
policy.Origins.Add("http://localhost:5001");
policy.Methods.Add("PUT");
policy.Headers.Add("Header1");
policy.ExposedHeaders.Add("AllowedHeader");
var appBuilder = new WebApplicationBuilder()
.Configure(app =>
{
app.UseCors("customPolicy");
app.Run(async context =>
{
await context.Response.WriteAsync("Cross origin response");
});
})
.ConfigureServices(services =>
{
services.AddCors(options =>
{
options.AddPolicy("customPolicy", policy);
});
});
using (var server = new TestServer(appBuilder))
{
// Act
// Preflight request.
var response = await server.CreateRequest("/")
.AddHeader(CorsConstants.Origin, "http://localhost:5001")
.AddHeader(CorsConstants.AccessControlRequestMethod, "PUT")
.SendAsync(CorsConstants.PreflightHttpMethod);
// Assert
response.EnsureSuccessStatusCode();
Assert.Equal(2, response.Headers.Count());
Assert.Equal("http://localhost:5001", response.Headers.GetValues(CorsConstants.AccessControlAllowOrigin).FirstOrDefault());
Assert.Equal("PUT", response.Headers.GetValues(CorsConstants.AccessControlAllowMethods).FirstOrDefault());
}
}
public void ConstructorWithPolicy_HavingNullPreflightMaxAge_AddsTheGivenPolicy()
{
// Arrange
var originalPolicy = new CorsPolicy();
originalPolicy.Origins.Add("http://existing.com");
// Act
var builder = new CorsPolicyBuilder(originalPolicy);
// Assert
var corsPolicy = builder.Build();
Assert.Null(corsPolicy.PreflightMaxAge);
Assert.False(corsPolicy.AllowAnyHeader);
Assert.False(corsPolicy.AllowAnyMethod);
Assert.False(corsPolicy.AllowAnyOrigin);
Assert.NotSame(originalPolicy.Origins, corsPolicy.Origins);
Assert.Equal(originalPolicy.Origins, corsPolicy.Origins);
Assert.Empty(corsPolicy.Headers);
Assert.Empty(corsPolicy.Methods);
Assert.Empty(corsPolicy.ExposedHeaders);
}
public void ToString_ReturnsThePropertyValues()
{
// Arrange
var corsPolicy = new CorsPolicy
{
PreflightMaxAge = TimeSpan.FromSeconds(12),
SupportsCredentials = true
};
corsPolicy.Headers.Add("foo");
corsPolicy.Headers.Add("bar");
corsPolicy.Origins.Add("http://example.com");
corsPolicy.Origins.Add("http://example.org");
corsPolicy.Methods.Add("GET");
// Act
var policyString = corsPolicy.ToString();
// Assert
Assert.Equal(
@"AllowAnyHeader: False, AllowAnyMethod: False, AllowAnyOrigin: False, PreflightMaxAge: 12,"+
" SupportsCredentials: True, Origins: {http://example.com,http://example.org}, Methods: {GET},"+
" Headers: {foo,bar}, ExposedHeaders: {}",
policyString);
}
/// <summary>
/// Instantiates a new <see cref="CorsMiddleware"/>.
/// </summary>
/// <param name="next">The next middleware in the pipeline.</param>
/// <param name="corsService">An instance of <see cref="ICorsService"/>.</param>
/// <param name="policy">An instance of the <see cref="CorsPolicy"/> which can be applied.</param>
public CorsMiddleware(
RequestDelegate next,
ICorsService corsService,
CorsPolicy policy)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (corsService == null)
{
throw new ArgumentNullException(nameof(corsService));
}
if (policy == null)
{
throw new ArgumentNullException(nameof(policy));
}
_next = next;
_corsService = corsService;
_policy = policy;
}
public void EvaluatePolicy_PreflightRequest_MethodNotAllowed_ReturnsInvalidResult()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(method: "OPTIONS", origin: "http://example.com", accessControlRequestMethod: "PUT");
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("GET");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Empty(result.AllowedMethods);
}
public void EvaluatePolicy_PreflightRequest_SupportsCredentials_AllowCredentialsReturnsTrue()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(method: "OPTIONS", origin: "http://example.com", accessControlRequestMethod: "PUT");
var policy = new CorsPolicy
{
SupportsCredentials = true
};
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("*");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.True(result.SupportsCredentials);
}
public virtual void EvaluatePreflightRequest(HttpContext context, CorsPolicy policy, CorsResult result)
{
var origin = context.Request.Headers[CorsConstants.Origin];
if (StringValues.IsNullOrEmpty(origin) || !policy.AllowAnyOrigin && !policy.Origins.Contains(origin))
{
return;
}
var accessControlRequestMethod = context.Request.Headers[CorsConstants.AccessControlRequestMethod];
if (StringValues.IsNullOrEmpty(accessControlRequestMethod))
{
return;
}
var requestHeaders =
context.Request.Headers.GetCommaSeparatedValues(CorsConstants.AccessControlRequestHeaders);
if (!policy.AllowAnyMethod && !policy.Methods.Contains(accessControlRequestMethod))
{
return;
}
if (!policy.AllowAnyHeader &&
requestHeaders != null &&
!requestHeaders.All(header => CorsConstants.SimpleRequestHeaders.Contains(header, StringComparer.OrdinalIgnoreCase) ||
policy.Headers.Contains(header, StringComparer.OrdinalIgnoreCase)))
{
return;
}
AddOriginToResult(origin, policy, result);
result.SupportsCredentials = policy.SupportsCredentials;
result.PreflightMaxAge = policy.PreflightMaxAge;
result.AllowedMethods.Add(accessControlRequestMethod);
AddHeaderValues(result.AllowedHeaders, requestHeaders);
}
public void EvaluatePolicy_PreflightRequest_PreflightMaxAge_PreflightMaxAgeSet()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(method: "OPTIONS", origin: "http://example.com", accessControlRequestMethod: "PUT");
var policy = new CorsPolicy
{
PreflightMaxAge = TimeSpan.FromSeconds(10)
};
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("*");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal(TimeSpan.FromSeconds(10), result.PreflightMaxAge);
}
public void TryValidateOrigin_DoesCaseSensitiveComparison()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var policy = new CorsPolicy();
policy.Origins.Add("http://Example.com");
var httpContext = GetHttpContext(origin: "http://example.com");
// Act
var result = corsService.EvaluatePolicy(httpContext, policy);
// Assert
Assert.Empty(result.AllowedHeaders);
Assert.Empty(result.AllowedMethods);
Assert.Empty(result.AllowedExposedHeaders);
Assert.Null(result.AllowedOrigin);
}
/// <summary>
/// Creates a new instance of the <see cref="CorsPolicyBuilder"/>.
/// </summary>
/// <param name="policy">The policy which will be used to intialize the builder.</param>
public CorsPolicyBuilder(CorsPolicy policy)
{
Combine(policy);
}
/// <summary>
/// Combines the given <paramref name="policy"/> to the existing properties in the builder.
/// </summary>
/// <param name="policy">The policy which needs to be combined.</param>
/// <returns>The current policy builder</returns>
private CorsPolicyBuilder Combine(CorsPolicy policy)
{
if (policy == null)
{
throw new ArgumentNullException(nameof(policy));
}
WithOrigins(policy.Origins.ToArray());
WithHeaders(policy.Headers.ToArray());
WithExposedHeaders(policy.ExposedHeaders.ToArray());
WithMethods(policy.Methods.ToArray());
if (policy.PreflightMaxAge.HasValue)
{
SetPreflightMaxAge(policy.PreflightMaxAge.Value);
}
if (policy.SupportsCredentials)
{
AllowCredentials();
}
else
{
DisallowCredentials();
}
return this;
}
public void EvaluatePolicy_PreflightRequest_HeadersRequested_AllowAllHeaders_ReturnsRequestedHeaders()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(
method: "OPTIONS",
origin: "http://example.com",
accessControlRequestMethod: "PUT",
accessControlRequestHeaders: new[] { "foo", "bar" });
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("*");
policy.Headers.Add("*");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal(2, result.AllowedHeaders.Count);
Assert.Contains("foo", result.AllowedHeaders);
Assert.Contains("bar", result.AllowedHeaders);
}
public void EvaluatePolicy_PreflightRequest_HeadersRequested_AllowSomeHeaders_ReturnsSubsetOfListedHeaders()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(
method: "OPTIONS",
origin: "http://example.com",
accessControlRequestMethod: "PUT",
accessControlRequestHeaders: new[] { "content-type", "accept" });
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("*");
policy.Headers.Add("foo");
policy.Headers.Add("bar");
policy.Headers.Add("Content-Type");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal(2, result.AllowedHeaders.Count);
Assert.Contains("Content-Type", result.AllowedHeaders, StringComparer.OrdinalIgnoreCase);
}
public void EvaluatePolicy_AllowAnyOrigin_SupportsCredentials_AddsSpecificOrigin()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(origin: "http://example.com");
var policy = new CorsPolicy
{
SupportsCredentials = true
};
policy.Origins.Add(CorsConstants.AnyOrigin);
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal("http://example.com", result.AllowedOrigin);
Assert.True(result.VaryByOrigin);
}
public void EvaluatePolicy_PreflightRequest_HeadersRequested_NotAllHeaderMatches_ReturnsInvalidResult()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(
method: "OPTIONS",
origin: "http://example.com",
accessControlRequestMethod: "PUT",
accessControlRequestHeaders: new[] { "match", "noMatch" });
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("*");
policy.Headers.Add("match");
policy.Headers.Add("foo");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Empty(result.AllowedHeaders);
Assert.Empty(result.AllowedMethods);
Assert.Empty(result.AllowedExposedHeaders);
Assert.Null(result.AllowedOrigin);
}
public void EvaluatePolicy_ManyExposedHeaders_HeadersAllowed()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(origin: "http://example.com");
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.ExposedHeaders.Add("foo");
policy.ExposedHeaders.Add("bar");
policy.ExposedHeaders.Add("baz");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal(3, result.AllowedExposedHeaders.Count);
Assert.Contains("foo", result.AllowedExposedHeaders);
Assert.Contains("bar", result.AllowedExposedHeaders);
Assert.Contains("baz", result.AllowedExposedHeaders);
}
private void AddOriginToResult(string origin, CorsPolicy policy, CorsResult result)
{
if (policy.AllowAnyOrigin)
{
if (policy.SupportsCredentials)
{
result.AllowedOrigin = origin;
result.VaryByOrigin = true;
}
else
{
result.AllowedOrigin = CorsConstants.AnyOrigin;
}
}
else if (policy.Origins.Contains(origin))
{
result.AllowedOrigin = origin;
}
}
public void EvaluatePolicy_PreflightRequest_ListedMethod_ReturnsSubsetOfListedMethods()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var requestContext = GetHttpContext(method: "OPTIONS", origin: "http://example.com", accessControlRequestMethod: "PUT");
var policy = new CorsPolicy();
policy.Origins.Add(CorsConstants.AnyOrigin);
policy.Methods.Add("PUT");
policy.Methods.Add("DELETE");
// Act
var result = corsService.EvaluatePolicy(requestContext, policy);
// Assert
Assert.Equal(1, result.AllowedMethods.Count);
Assert.Contains("PUT", result.AllowedMethods);
}
// This method gets called by a runtime.
// Use this method to add services to the container
public void ConfigureServices(IServiceCollection services)
{
var cacheStore = new CacheStore();
//CORS -- temporary currently allow anyone to connect
var OpenBookAPIcors = new CorsPolicy();
OpenBookAPIcors.Headers.Add("*");
OpenBookAPIcors.Origins.Add("*");
OpenBookAPIcors.Methods.Add("*");
OpenBookAPIcors.SupportsCredentials = true;
services.AddCors(cors => cors.AddPolicy("OpenBookAPI", OpenBookAPIcors));
//Dependancy Injection
Modules.Register(services);
services.AddInstance(typeof(IConfiguration),Configuration);
services.AddInstance(typeof(ICacheStore), cacheStore);
services.AddSingleton<HttpCacheActionFilter>();
services.AddInstance<IRouter>(_router);
services.AddInstance<Serilog.ILogger>(Log.Logger);
//Swagger
services.AddSwagger();
services.ConfigureSwaggerDocument(options =>
{
options.SingleApiVersion(new Info
{
Version = "v1",
Title = "OpenBook API",
Description = "The API Backend for the OpenBookApp",
TermsOfService = "No Potatos.",
});
});
services.AddSignalR(options =>
{
options.Hubs.EnableDetailedErrors = true;
});
services.AddMvc(options =>
{
options.Filters.Add(typeof(GlobalExceptionFilter));
options.Filters.Add(typeof(HttpCacheActionFilter)); //new HttpCacheActionFilter(cacheStore, Log.Logger));
});
}
public void EaluatePolicy_DoesCaseSensitiveComparison()
{
// Arrange
var corsService = new CorsService(new TestCorsOptions());
var policy = new CorsPolicy();
policy.Methods.Add("POST");
var httpContext = GetHttpContext(origin: null, accessControlRequestMethod: "post");
// Act
var result = corsService.EvaluatePolicy(httpContext, policy);
// Assert
Assert.Empty(result.AllowedHeaders);
Assert.Empty(result.AllowedMethods);
Assert.Empty(result.AllowedExposedHeaders);
Assert.Null(result.AllowedOrigin);
}