Create API Gateway

Step 1: Create REST API

1. Go to API Gateway Console → Create API

2. Choose API type:

   • REST API → Build

3. Create new API:

   • Protocol: REST
   • Create new API: New API
   • API name: daivietblood-api
   • Description: REST API for DaiVietBlood system
   • Endpoint Type: Regional

4. Click Create API

Step 2: Create Resources

2.1. Create /users Resource

1. Select root / → Actions → Create Resource

2. Configure:

   • Resource Name: users
   • Resource Path: users
   • Enable API Gateway CORS: ✅ Check

3. Click Create Resource

2.2. Create /emergency-requests Resource

1. Select root / → Actions → Create Resource

2. Configure:

   • Resource Name: emergency-requests
   • Resource Path: emergency-requests
   • Enable API Gateway CORS: ✅ Check

3. Click Create Resource

Step 3: Create Methods for /users

3.1. GET /users

1. Select /users → Actions → Create Method → GET

2. Integration setup:

   • Integration type: Lambda Function
   • Use Lambda Proxy integration: ✅ Check
   • Lambda Region: ap-southeast-1
   • Lambda Function: daivietblood-get-users

3. Click Save → OK (to add permission)

3.2. POST /users

1. Select /users → Actions → Create Method → POST

2. Integration setup:

   • Integration type: Lambda Function
   • Use Lambda Proxy integration: ✅ Check
   • Lambda Region: ap-southeast-1
   • Lambda Function: daivietblood-create-user

3. Click Save → OK

Step 4: Create Methods for /emergency-requests

4.1. GET /emergency-requests

1. Select /emergency-requests → Actions → Create Method → GET

2. Integration setup:

   • Integration type: Lambda Function
   • Use Lambda Proxy integration: ✅ Check
   • Lambda Function: daivietblood-emergency-requests

3. Click Save → OK

4.2. POST /emergency-requests

1. Select /emergency-requests → Actions → Create Method → POST

2. Integration setup:

   • Integration type: Lambda Function
   • Use Lambda Proxy integration: ✅ Check
   • Lambda Function: daivietblood-emergency-requests

3. Click Save → OK

Step 5: Enable CORS

For each resource (/users, /emergency-requests):

1. Select resource → Actions → Enable CORS

2. Configure:

   • Access-Control-Allow-Methods: GET, POST, OPTIONS
   • Access-Control-Allow-Headers: Content-Type, X-Amz-Date, Authorization, X-Api-Key
   • Access-Control-Allow-Origin: *

3. Click Enable CORS and replace existing CORS headers

4. Click Yes, replace existing values

Step 6: Deploy API

1. Actions → Deploy API

2. Deployment stage:

   • Deployment stage: [New Stage]
   • Stage name: prod
   • Stage description: Production stage

3. Click Deploy

4. Copy the Invoke URL:

   https://xxxxxxxxxx.execute-api.ap-southeast-1.amazonaws.com/prod
   

Step 7: API Structure Summary

After completing, your API structure should look like:

daivietblood-api
│
├── /users
│   ├── GET    → daivietblood-get-users
│   ├── POST   → daivietblood-create-user
│   └── OPTIONS (CORS)
│
└── /emergency-requests
    ├── GET    → daivietblood-emergency-requests
    ├── POST   → daivietblood-emergency-requests
    └── OPTIONS (CORS)

Verification Checklist

• REST API created
• /users resource created with GET and POST methods
• /emergency-requests resource created with GET and POST methods
• CORS enabled for all resources
• API deployed to prod stage
• Invoke URL saved