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AWS in Action: API Gateway

The example in this repository reuses the example from chapter 10 in Amazon Web Services in Action. You can find the code for the original example in the book's code repository.

Use Swagger UI to have a look at the API definition.

Setup

You have multiple options to setup the example:

  1. Using the Serverless Framework
  2. Using CloudFormation
  3. Using CloudFormation, Swagger / OpenAPI Specification and the AWS CLI
  4. Deprecated: Using CloudFormation, Swagger / OpenAPI Specification and the Amazon API Gateway Importer

Using the Serverless Framework

clone this repository

$ git clone git@github.com:AWSinAction/apigateway.git
$ cd apigateway/

install the Serverless Framework

$ npm install -g serverless@1.0.0-rc.1

switch to the serverless-framework folder and install the dependencies

$ cd serverless-framework/
$ npm install --production

deploy the API

$ serverless deploy
[...]
Service Information
[...]
endpoints:
  GET - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/category/{category}/task
  PUT - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}/task/{taskId}
  DELETE - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}/task/{taskId}
  GET - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}/task
  POST - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}/task
  GET - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}
  DELETE - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user/{userId}
  GET - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user
  POST - https://$ApiId.execute-api.us-east-1.amazonaws.com/dev/user
functions:
[...]

export the API endpoint from above in a environment variable to easily make calls the the API next.

export ApiGatewayEndpoint=" https://$ApiId.execute-api.us-east-1.amazonaws.com/dev"

and now use the RESTful API.

Using CloudFormation

clone this repository

$ git clone git@github.com:AWSinAction/apigateway.git
$ cd apigateway/

create the lambda code file (lambda.zip)

$ npm install --production
$ ./bundle.sh

create an S3 bucket in the US East (N. Virginia, us-east-1) region and upload the lambda.zip file (replace $S3Bucket with a S3 bucket name)

$ export AWS_DEFAULT_REGION=us-east-1
$ export S3Bucket=$(whoami)-apigateway
$ aws s3 mb s3://$S3Bucket
$ aws s3 cp lambda.zip s3://$S3Bucket/lambda.zip

create cloudformation stack (replace $S3Bucket with your S3 bucket name)

$ aws cloudformation create-stack --stack-name apigateway --template-body file://template_with_api.json --capabilities CAPABILITY_IAM --parameters ParameterKey=S3Bucket,ParameterValue=$S3Bucket

wait until the stack is created (CREATE_COMPLETE)

$ aws cloudformation wait stack-create-complete --stack-name apigateway

get the $ApiId

$ aws cloudformation describe-stacks --stack-name apigateway --query Stacks[0].Outputs

set the $ApiGatewayEndpoint environment variable (replace $ApiId)

export ApiGatewayEndpoint="$ApiId.execute-api.us-east-1.amazonaws.com/v1"

and now use the RESTful API.

Using CloudFormation, Swagger / OpenAPI Specification and the AWS CLI

clone this repository

$ git clone git@github.com:AWSinAction/apigateway.git
$ cd apigateway/

create the lambda code file (lambda.zip)

$ npm install --production
$ ./bundle.sh

create an S3 bucket in the US East (N. Virginia, us-east-1) region and upload the lambda.zip file (replace $S3Bucket with a S3 bucket name)

export AWS_DEFAULT_REGION=us-east-1
export S3Bucket=$(whoami)-apigateway
$ aws s3 mb s3://$S3Bucket
$ aws s3 cp lambda.zip s3://$S3Bucket/lambda.zip

create cloudformation stack (replace $S3Bucket with your S3 bucket name)

$ aws cloudformation create-stack --stack-name apigateway --template-body file://template.json --capabilities CAPABILITY_IAM --parameters ParameterKey=S3Bucket,ParameterValue=$S3Bucket

wait until the stack is created (CREATE_COMPLETE)

$ aws cloudformation wait stack-create-complete --stack-name apigateway

replace all nine occurrences of $AWSRegion in swagger.json with the region that you are creating your API and Lamdba in

$ sed -i '.bak' 's/$AWSRegion/us-east-1/g' swagger.json

get the LambdaArn

$ aws cloudformation describe-stacks --stack-name apigateway --query Stacks[0].Outputs

replace all nine occurrences of $LambdaArn in swagger.json with the ARN from the stack output above (e.g. arn:aws:lambda:us-east-1:YYY:function:apigateway-Lambda-XXX)

$ sed -i '.bak' 's/$LambdaArn/arn:aws:lambda:us-east-1:YYY:function:apigateway-Lambda-XXX/g' swagger.json

deploy the API Gateway

make sure you have an up-to-date version (aws --version) of the AWS CLI >= 1.10.18. Learn more here: http://docs.aws.amazon.com/cli/latest/userguide/installing.html

$ aws apigateway import-rest-api --fail-on-warnings --body file://swagger.json

update the CloudFormation template to set the ApiId parameter (replace $ApiId with the id output from above)

$ aws cloudformation update-stack --stack-name apigateway --template-body file://template.json --capabilities CAPABILITY_IAM --parameters ParameterKey=S3Bucket,UsePreviousValue=true ParameterKey=S3Key,UsePreviousValue=true ParameterKey=ApiId,ParameterValue=$ApiId

deploy to stage v1 (replace $ApiId)

$ aws apigateway create-deployment --rest-api-id $ApiId --stage-name v1

set the $ApiGatewayEndpoint environment variable (replace $ApiId)

export ApiGatewayEndpoint="$ApiId.execute-api.us-east-1.amazonaws.com/v1"

and now use the RESTful API.

Deprecated: Using CloudFormation, Swagger / OpenAPI Specification and the Amazon API Gateway Importer

This method is deprecated. Please choose one of the other methods mentioned earlier!

clone this repository

$ git clone git@github.com:AWSinAction/apigateway.git
$ cd apigateway/

create the lambda code file (lambda.zip)

$ npm install --production
$ ./bundle.sh

create an S3 bucket in the US East (N. Virginia, us-east-1) region and upload the lambda.zip file (replace $S3Bucket with a S3 bucket name)

export AWS_DEFAULT_REGION=us-east-1
export S3Bucket=$(whoami)-apigateway
$ aws s3 mb s3://$S3Bucket
$ aws s3 cp lambda.zip s3://$S3Bucket/lambda.zip

create cloudformation stack (replace $S3Bucket with your S3 bucket name)

$ aws cloudformation create-stack --stack-name apigateway --template-body file://template.json --capabilities CAPABILITY_IAM --parameters ParameterKey=S3Bucket,ParameterValue=$S3Bucket

wait until the stack is created (CREATE_COMPLETE)

$ aws cloudformation wait stack-create-complete --stack-name apigateway

replace all nine occurrences of $AWSRegion in swagger.json with the region that you are creating your API and Lamdba in

$ sed -i '.bak' 's/$AWSRegion/us-east-1/g' swagger.json

get the LambdaArn

$ aws cloudformation describe-stacks --stack-name apigateway --query Stacks[0].Outputs

replace all nine occurrences of $LambdaArn in swagger.json with the ARN from the stack output above (e.g. arn:aws:lambda:us-east-1:YYY:function:apigateway-Lambda-XXX)

$ sed -i '.bak' 's/$LambdaArn/arn:aws:lambda:us-east-1:YYY:function:apigateway-Lambda-XXX/g' swagger.json

deploy the API Gateway

$ cd aws-apigateway-importer-master/
$ mvn assembly:assembly
$ ./aws-api-import.sh --create ../swagger.json
$ cd ..

using the CLI to see if it worked

$ aws apigateway get-rest-apis

update the CloudFormation template to set the ApiId parameter (replace $ApiId with the id output from above)

$ aws cloudformation update-stack --stack-name apigateway --template-body file://template.json --capabilities CAPABILITY_IAM --parameters ParameterKey=S3Bucket,UsePreviousValue=true ParameterKey=S3Key,UsePreviousValue=true ParameterKey=ApiId,ParameterValue=$ApiId

deploy to stage (replace $ApiId)

$ cd aws-apigateway-importer-master/
$ ./aws-api-import.sh --update $ApiId --deploy stage ../swagger.json
$ cd ..

set the $ApiGatewayEndpoint environment variable (replace $ApiId)

export ApiGatewayEndpoint="$ApiId.execute-api.us-east-1.amazonaws.com/stage/v1"

and now use the RESTful API.

Use the RESTful API

the following examples assume that you replace $ApiGatewayEndpoint with $ApiId.execute-api.us-east-1.amazonaws.com

create a user

curl -vvv -X POST -d '{"email": "your@mail.com", "phone": "0123456789"}' -H "Content-Type: application/json" https://$ApiGatewayEndpoint/user

list users

curl -vvv -X GET https://$ApiGatewayEndpoint/user

create a task

curl -vvv -X POST -d '{"description": "test task"}' -H "Content-Type: application/json" https://$ApiGatewayEndpoint/user/$UserId/task

list tasks

curl -vvv -X GET https://$ApiGatewayEndpoint/user/$UserId/task

mark task as complete

curl -vvv -X PUT https://$ApiGatewayEndpoint/user/$UserId/task/$TaskId

delete task

curl -vvv -X DELETE https://$ApiGatewayEndpoint/user/$UserId/task/$TaskId

create a task with a category

curl -vvv -X POST -d '{"description": "test task", "category": "test"}' -H "Content-Type: application/json" https://$ApiGatewayEndpoint/user/$UserId/task

list tasks by category

curl -vvv -X GET https://$ApiGatewayEndpoint/category/$Category/task

Teardown

Using the Serverless Framework

remove the API

$ serverless remove

Using CloudFormation

delete CloudFormation stack

$ aws cloudformation delete-stack --stack-name apigateway

delete S3 bucket (replace $S3Bucket)

$ aws s3 rb --force s3://$S3Bucket

Using CloudFormation, Swagger / OpenAPI Specification and the AWS CLI

delete API Gateway (replace $ApiId)

$ aws apigateway delete-rest-api --rest-api-id $ApiId

delete CloudFormation stack

$ aws cloudformation delete-stack --stack-name apigateway

delete S3 bucket (replace $S3Bucket)

$ aws s3 rb --force s3://$S3Bucket

Using CloudFormation, Swagger / OpenAPI Specification and the Amazon API Gateway Importer

delete API Gateway (replace $ApiId)

$ aws apigateway delete-rest-api --rest-api-id $ApiId

delete CloudFormation stack

$ aws cloudformation delete-stack --stack-name apigateway

delete S3 bucket (replace $S3Bucket)

$ aws s3 rb --force s3://$S3Bucket

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