func appendS3Lambda(api *sparta.API, lambdaFunctions []*sparta.LambdaAWSInfo) []*sparta.LambdaAWSInfo {
lambdaFn := sparta.NewLambda(sparta.IAMRoleDefinition{}, echoS3Event, nil)
apiGatewayResource, _ := api.NewResource("/hello/world/test", lambdaFn)
apiGatewayResource.NewMethod("GET", http.StatusOK)
lambdaFn.Permissions = append(lambdaFn.Permissions, sparta.S3Permission{
BasePermission: sparta.BasePermission{
SourceArn: s3Bucket,
},
Events: []string{"s3:ObjectCreated:*", "s3:ObjectRemoved:*"},
})
return append(lambdaFunctions, lambdaFn)
}
////////////////////////////////////////////////////////////////////////////////
// Return the *[]sparta.LambdaAWSInfo slice
//
func imagerFunctions(api *sparta.API) ([]*sparta.LambdaAWSInfo, error) {
//////////////////////////////////////////////////////////////////////////////
// 1 - Lambda function that listens to S3 events and stamps images
//////////////////////////////////////////////////////////////////////////////
// Provision an IAM::Role as part of this application
var iamRole = sparta.IAMRoleDefinition{}
// Setup the ARN that includes all child keys
resourceArn := fmt.Sprintf("%s/*", s3EventBroadcasterBucket)
iamRole.Privileges = append(iamRole.Privileges, sparta.IAMRolePrivilege{
Actions: []string{"s3:GetObject",
"s3:PutObject",
},
Resource: resourceArn,
})
var lambdaFunctions []*sparta.LambdaAWSInfo
// The default timeout is 3 seconds - increase that to 30 seconds s.t. the
// transform lambda doesn't fail early.
transformOptions := &sparta.LambdaFunctionOptions{
Description: "Stamp assets in S3",
MemorySize: 128,
Timeout: 30,
}
lambdaFn := sparta.NewLambda(iamRole, transformImage, transformOptions)
//////////////////////////////////////////////////////////////////////////////
// S3 configuration
//
lambdaFn.Permissions = append(lambdaFn.Permissions, sparta.S3Permission{
BasePermission: sparta.BasePermission{
SourceArn: s3EventBroadcasterBucket,
},
Events: []string{"s3:ObjectCreated:*", "s3:ObjectRemoved:*"},
})
lambdaFunctions = append(lambdaFunctions, lambdaFn)
//////////////////////////////////////////////////////////////////////////////
// 2 - Lambda function that allows for querying of S3 information
//////////////////////////////////////////////////////////////////////////////
s3ItemInfoOptions := &sparta.LambdaFunctionOptions{
Description: "Get information about an item in S3 via querystring params",
MemorySize: 128,
Timeout: 10,
}
var iamDynamicRole = sparta.IAMRoleDefinition{}
iamDynamicRole.Privileges = append(iamDynamicRole.Privileges, sparta.IAMRolePrivilege{
Actions: []string{"s3:GetObject"},
Resource: resourceArn,
})
s3ItemInfoLambdaFn := sparta.NewLambda(iamDynamicRole, s3ItemInfo, s3ItemInfoOptions)
// Register the function with the API Gateway
apiGatewayResource, _ := api.NewResource("/info", s3ItemInfoLambdaFn)
method, err := apiGatewayResource.NewMethod("GET", http.StatusOK)
if err != nil {
return nil, err
}
// Whitelist query string params
method.Parameters["method.request.querystring.keyName"] = true
method.Parameters["method.request.querystring.bucketName"] = true
lambdaFunctions = append(lambdaFunctions, s3ItemInfoLambdaFn)
return lambdaFunctions, nil
}