/
gateway.go
137 lines (110 loc) · 3.86 KB
/
gateway.go
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package builder
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/apigateway"
)
// CreateAPIGateway creates an API Gateway and attaches it to the GatewayBuilder
func (builder *GatewayBuilder) CreateAPIGateway() error {
svc := apigateway.New(session.New(), &aws.Config{Region: builder.Settings.Region})
params := &apigateway.CreateRestApiInput{
Name: aws.String(fmt.Sprintf("%sLambda", builder.Settings.CleanName())),
Description: aws.String(fmt.Sprintf("API for Lambda function %s",
aws.StringValue(builder.Settings.FunctionName))),
}
gateway, err := svc.CreateRestApi(params)
if err != nil {
return err
}
builder.APIGateway = gateway
return nil
}
// AddResources adds a Resource (endpoint) to the API Gateway and attaches it to the GatewayBuilder
func (builder *GatewayBuilder) AddResources() error {
svc := apigateway.New(session.New(), &aws.Config{Region: builder.Settings.Region})
params := &apigateway.GetResourcesInput{
RestApiId: builder.APIGateway.Id,
Limit: aws.Int64(1),
}
resp, err := svc.GetResources(params)
if err != nil {
return err
}
builder.RootResource = resp.Items[0]
resourceParams := &apigateway.CreateResourceInput{
ParentId: builder.RootResource.Id,
PathPart: aws.String(builder.Settings.CleanName()),
RestApiId: builder.APIGateway.Id,
}
resource, err := svc.CreateResource(resourceParams)
if err != nil {
return err
}
builder.Resource = resource
return nil
}
// ConfigureResources configures the Resource in the GatewayBuilder to be set up
// for receiving POST messages and translate them into simple JSON messages
func (builder *GatewayBuilder) ConfigureResources() error {
svc := apigateway.New(session.New(), &aws.Config{Region: builder.Settings.Region})
uriString := fmt.Sprintf("arn:aws:apigateway:%s:lambda:path/2015-03-31/functions/%s/invocations",
aws.StringValue(builder.Settings.Region),
aws.StringValue(builder.Lambda.FunctionArn))
methodParams := &apigateway.PutMethodInput{
AuthorizationType: builder.Settings.Authentication,
HttpMethod: builder.Settings.HTTPMethod,
ResourceId: builder.Resource.Id,
RestApiId: builder.APIGateway.Id,
ApiKeyRequired: builder.Settings.ApikeyRequired,
}
_, err := svc.PutMethod(methodParams)
if err != nil {
return err
}
params := &apigateway.PutIntegrationInput{
HttpMethod: builder.Settings.HTTPMethod,
ResourceId: builder.Resource.Id,
RestApiId: builder.APIGateway.Id,
Type: aws.String("AWS"),
IntegrationHttpMethod: builder.Settings.HTTPMethod,
RequestTemplates: map[string]*string{
"application/x-www-form-urlencoded": aws.String(`{"body": $input.json("$")}`),
},
Uri: aws.String(uriString),
}
_, err = svc.PutIntegration(params)
if err != nil {
return err
}
integrationResponseParams := &apigateway.PutIntegrationResponseInput{
HttpMethod: builder.Settings.HTTPMethod,
ResourceId: builder.Resource.Id,
RestApiId: builder.APIGateway.Id,
StatusCode: aws.String("200"),
SelectionPattern: aws.String(".*"),
}
_, err = svc.PutIntegrationResponse(integrationResponseParams)
if err != nil {
return err
}
methodResponsParams := &apigateway.PutMethodResponseInput{
HttpMethod: builder.Settings.HTTPMethod,
ResourceId: builder.Resource.Id,
RestApiId: builder.APIGateway.Id,
StatusCode: aws.String("200"),
ResponseModels: map[string]*string{},
}
_, err = svc.PutMethodResponse(methodResponsParams)
return err
}
// DeployAPI deploys the API attached to the GatewayBuilder
func (builder *GatewayBuilder) DeployAPI() error {
svc := apigateway.New(session.New(), &aws.Config{Region: builder.Settings.Region})
params := &apigateway.CreateDeploymentInput{
RestApiId: builder.APIGateway.Id,
StageName: aws.String("prod"),
}
_, err := svc.CreateDeployment(params)
return err
}