/// <summary>
/// Specifies the cross-origin resource sharing (CORS) configuration for an HTTP API. The extension applies to the root-level OpenAPI structure.
/// </summary>
/// <param name="setupAction"></param>
public XAmazonApiGatewayOptions WithCors(Action <XAmazonApiGatewayCORSOptions> setupAction)
{
CorsOptions = new XAmazonApiGatewayCORSOptions();
setupAction.Invoke(CorsOptions);
return(this);
}
internal static OpenApiOperation FromCorsOptions(XAmazonApiGatewayCORSOptions options, OpenApiPathItem path)
{
var corsOptionOperation = BuildCorsOptionOperation(options, path);
var integrationOptions = new XAmazonApiGatewayIntegrationOptions
{
Type = IntegrationType.mock,
PassthroughBehavior = PassthroughBehavior.WHEN_NO_MATCH,
Responses = new Dictionary <string, IntegrationResponse>
{
{
"200",
new IntegrationResponse
{
StatusCode = "200",
ResponseParameters = new Dictionary <string, string>()
.ConditionalAdd
(
() => options?.AllowMethods != null && options.AllowMethods.Any(),
$"method.response.header.{HeaderNames.AccessControlAllowMethods}",
() => $"'{string.Join(",", options.AllowMethods)}'"
)
.ConditionalAdd
(
() => options?.AllowHeaders != null && options.AllowHeaders.Any(),
$"method.response.header.{HeaderNames.AccessControlAllowHeaders}",
() => $"'{string.Join(",", options.AllowHeaders)}'"
)
.ConditionalAdd
(
() => options?.AllowOrigins != null && options.AllowOrigins.Any(),
$"method.response.header.{HeaderNames.AccessControlAllowOrigin}",
() => $"'{string.Join(",", options.AllowOrigins)}'"
)
.ConditionalAdd
(
() => options?.ExposeHeaders != null && options.ExposeHeaders.Any(),
$"method.response.header.{HeaderNames.AccessControlExposeHeaders}",
() => $"'{string.Join(",", options.ExposeHeaders)}'"
)
.ConditionalAdd
(
() => options.MaxAge.HasValue,
HeaderNames.AccessControlMaxAge,
() => options.MaxAge.Value.ToString()
)
.ConditionalAdd
(
() => options.AllowCredentials.HasValue && options.AllowCredentials.Value,
HeaderNames.AccessControlAllowCredentials,
() => bool.TrueString.ToLower()
)
}
}
},
RequestTemplates = new Dictionary <string, string>
{
{ "application/json", "{\"statusCode\": 200}" }
}
};
foreach (var item in integrationOptions.ToDictionary())
{
corsOptionOperation.Extensions.Add(item.Key, item.Value);
}
return(corsOptionOperation);
}
private static OpenApiOperation BuildCorsOptionOperation(XAmazonApiGatewayCORSOptions options, OpenApiPathItem path)
{
var response = new OpenApiResponse
{
Description = "Success",
// AWS needs an empty content dictionary. Unfortunately the OpenApiResponse serializer
// considers the Content collection optional and will not serialize and empty dictionary.
// Hence, an empty content dictionary is added below as an extension.
// Content = new Dictionary<string, OpenApiMediaType>(),
Extensions = new Dictionary <string, IOpenApiExtension>()
{
{ "content", new OpenApiObject() }
},
Headers = new Dictionary <string, OpenApiHeader>()
.ConditionalAdd
(
() => options?.AllowOrigins != null && options.AllowOrigins.Any(),
HeaderNames.AccessControlAllowOrigin,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
.ConditionalAdd
(
() => options?.AllowMethods != null && options.AllowMethods.Any(),
HeaderNames.AccessControlAllowMethods,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
.ConditionalAdd
(
() => options?.AllowHeaders != null && options.AllowHeaders.Any(),
HeaderNames.AccessControlAllowHeaders,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
.ConditionalAdd
(
() => options?.ExposeHeaders != null && options.ExposeHeaders.Any(),
HeaderNames.AccessControlExposeHeaders,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
.ConditionalAdd
(
() => options.MaxAge.HasValue,
HeaderNames.AccessControlMaxAge,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
.ConditionalAdd
(
() => options.AllowCredentials.HasValue && options.AllowCredentials.Value,
HeaderNames.AccessControlAllowCredentials,
() => new OpenApiHeader {
Schema = new OpenApiSchema {
Type = "string"
}
}
)
};
return(new OpenApiOperation
{
Responses = new OpenApiResponses {
{ "200", response }
},
Parameters = path.Operations.Select(x => x.Value).FirstOrDefault()?.Parameters
});
}