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api_op_GetAuthorizer.go
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api_op_GetAuthorizer.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package apigateway
import (
"context"
"errors"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
internalauth "github.com/aws/aws-sdk-go-v2/internal/auth"
"github.com/aws/aws-sdk-go-v2/service/apigateway/types"
smithyendpoints "github.com/aws/smithy-go/endpoints"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// Describe an existing Authorizer resource.
func (c *Client) GetAuthorizer(ctx context.Context, params *GetAuthorizerInput, optFns ...func(*Options)) (*GetAuthorizerOutput, error) {
if params == nil {
params = &GetAuthorizerInput{}
}
result, metadata, err := c.invokeOperation(ctx, "GetAuthorizer", params, optFns, c.addOperationGetAuthorizerMiddlewares)
if err != nil {
return nil, err
}
out := result.(*GetAuthorizerOutput)
out.ResultMetadata = metadata
return out, nil
}
// Request to describe an existing Authorizer resource.
type GetAuthorizerInput struct {
// The identifier of the Authorizer resource.
//
// This member is required.
AuthorizerId *string
// The string identifier of the associated RestApi.
//
// This member is required.
RestApiId *string
noSmithyDocumentSerde
}
// Represents an authorization layer for methods. If enabled on a method, API
// Gateway will activate the authorizer when a client calls the method.
type GetAuthorizerOutput struct {
// Optional customer-defined field, used in OpenAPI imports and exports without
// functional impact.
AuthType *string
// Specifies the required credentials as an IAM role for API Gateway to invoke the
// authorizer. To specify an IAM role for API Gateway to assume, use the role's
// Amazon Resource Name (ARN). To use resource-based permissions on the Lambda
// function, specify null.
AuthorizerCredentials *string
// The TTL in seconds of cached authorizer results. If it equals 0, authorization
// caching is disabled. If it is greater than 0, API Gateway will cache authorizer
// responses. If this field is not set, the default value is 300. The maximum value
// is 3600, or 1 hour.
AuthorizerResultTtlInSeconds *int32
// Specifies the authorizer's Uniform Resource Identifier (URI). For TOKEN or
// REQUEST authorizers, this must be a well-formed Lambda function URI, for
// example,
// arn:aws:apigateway:us-west-2:lambda:path/2015-03-31/functions/arn:aws:lambda:us-west-2:{account_id}:function:{lambda_function_name}/invocations
// . In general, the URI has this form
// arn:aws:apigateway:{region}:lambda:path/{service_api} , where {region} is the
// same as the region hosting the Lambda function, path indicates that the
// remaining substring in the URI should be treated as the path to the resource,
// including the initial / . For Lambda functions, this is usually of the form
// /2015-03-31/functions/[FunctionARN]/invocations .
AuthorizerUri *string
// The identifier for the authorizer resource.
Id *string
// The identity source for which authorization is requested. For a TOKEN or
// COGNITO_USER_POOLS authorizer, this is required and specifies the request header
// mapping expression for the custom header holding the authorization token
// submitted by the client. For example, if the token header name is Auth , the
// header mapping expression is method.request.header.Auth . For the REQUEST
// authorizer, this is required when authorization caching is enabled. The value is
// a comma-separated string of one or more mapping expressions of the specified
// request parameters. For example, if an Auth header, a Name query string
// parameter are defined as identity sources, this value is
// method.request.header.Auth , method.request.querystring.Name . These parameters
// will be used to derive the authorization caching key and to perform runtime
// validation of the REQUEST authorizer by verifying all of the identity-related
// request parameters are present, not null and non-empty. Only when this is true
// does the authorizer invoke the authorizer Lambda function, otherwise, it returns
// a 401 Unauthorized response without calling the Lambda function. The valid value
// is a string of comma-separated mapping expressions of the specified request
// parameters. When the authorization caching is not enabled, this property is
// optional.
IdentitySource *string
// A validation expression for the incoming identity token. For TOKEN authorizers,
// this value is a regular expression. For COGNITO_USER_POOLS authorizers, API
// Gateway will match the aud field of the incoming token from the client against
// the specified regular expression. It will invoke the authorizer's Lambda
// function when there is a match. Otherwise, it will return a 401 Unauthorized
// response without calling the Lambda function. The validation expression does not
// apply to the REQUEST authorizer.
IdentityValidationExpression *string
// The name of the authorizer.
Name *string
// A list of the Amazon Cognito user pool ARNs for the COGNITO_USER_POOLS
// authorizer. Each element is of this format:
// arn:aws:cognito-idp:{region}:{account_id}:userpool/{user_pool_id} . For a TOKEN
// or REQUEST authorizer, this is not defined.
ProviderARNs []string
// The authorizer type. Valid values are TOKEN for a Lambda function using a
// single authorization token submitted in a custom header, REQUEST for a Lambda
// function using incoming request parameters, and COGNITO_USER_POOLS for using an
// Amazon Cognito user pool.
Type types.AuthorizerType
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationGetAuthorizerMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsRestjson1_serializeOpGetAuthorizer{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetAuthorizer{}, middleware.After)
if err != nil {
return err
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
return err
}
if err = addRetryMiddlewares(stack, options); err != nil {
return err
}
if err = addHTTPSignerV4Middleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
return err
}
if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addGetAuthorizerResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addOpGetAuthorizerValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetAuthorizer(options.Region), middleware.Before); err != nil {
return err
}
if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addAcceptHeader(stack); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addendpointDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func newServiceMetadataMiddleware_opGetAuthorizer(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "apigateway",
OperationName: "GetAuthorizer",
}
}
type opGetAuthorizerResolveEndpointMiddleware struct {
EndpointResolver EndpointResolverV2
BuiltInResolver builtInParameterResolver
}
func (*opGetAuthorizerResolveEndpointMiddleware) ID() string {
return "ResolveEndpointV2"
}
func (m *opGetAuthorizerResolveEndpointMiddleware) HandleSerialize(ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler) (
out middleware.SerializeOutput, metadata middleware.Metadata, err error,
) {
if awsmiddleware.GetRequiresLegacyEndpoints(ctx) {
return next.HandleSerialize(ctx, in)
}
req, ok := in.Request.(*smithyhttp.Request)
if !ok {
return out, metadata, fmt.Errorf("unknown transport type %T", in.Request)
}
if m.EndpointResolver == nil {
return out, metadata, fmt.Errorf("expected endpoint resolver to not be nil")
}
params := EndpointParameters{}
m.BuiltInResolver.ResolveBuiltIns(¶ms)
var resolvedEndpoint smithyendpoints.Endpoint
resolvedEndpoint, err = m.EndpointResolver.ResolveEndpoint(ctx, params)
if err != nil {
return out, metadata, fmt.Errorf("failed to resolve service endpoint, %w", err)
}
req.URL = &resolvedEndpoint.URI
for k := range resolvedEndpoint.Headers {
req.Header.Set(
k,
resolvedEndpoint.Headers.Get(k),
)
}
authSchemes, err := internalauth.GetAuthenticationSchemes(&resolvedEndpoint.Properties)
if err != nil {
var nfe *internalauth.NoAuthenticationSchemesFoundError
if errors.As(err, &nfe) {
// if no auth scheme is found, default to sigv4
signingName := "apigateway"
signingRegion := m.BuiltInResolver.(*builtInResolver).Region
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
}
var ue *internalauth.UnSupportedAuthenticationSchemeSpecifiedError
if errors.As(err, &ue) {
return out, metadata, fmt.Errorf(
"This operation requests signer version(s) %v but the client only supports %v",
ue.UnsupportedSchemes,
internalauth.SupportedSchemes,
)
}
}
for _, authScheme := range authSchemes {
switch authScheme.(type) {
case *internalauth.AuthenticationSchemeV4:
v4Scheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4)
var signingName, signingRegion string
if v4Scheme.SigningName == nil {
signingName = "apigateway"
} else {
signingName = *v4Scheme.SigningName
}
if v4Scheme.SigningRegion == nil {
signingRegion = m.BuiltInResolver.(*builtInResolver).Region
} else {
signingRegion = *v4Scheme.SigningRegion
}
if v4Scheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4Scheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
break
case *internalauth.AuthenticationSchemeV4A:
v4aScheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4A)
if v4aScheme.SigningName == nil {
v4aScheme.SigningName = aws.String("apigateway")
}
if v4aScheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4aScheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, *v4aScheme.SigningName)
ctx = awsmiddleware.SetSigningRegion(ctx, v4aScheme.SigningRegionSet[0])
break
case *internalauth.AuthenticationSchemeNone:
break
}
}
return next.HandleSerialize(ctx, in)
}
func addGetAuthorizerResolveEndpointMiddleware(stack *middleware.Stack, options Options) error {
return stack.Serialize.Insert(&opGetAuthorizerResolveEndpointMiddleware{
EndpointResolver: options.EndpointResolverV2,
BuiltInResolver: &builtInResolver{
Region: options.Region,
UseDualStack: options.EndpointOptions.UseDualStackEndpoint,
UseFIPS: options.EndpointOptions.UseFIPSEndpoint,
Endpoint: options.BaseEndpoint,
},
}, "ResolveEndpoint", middleware.After)
}