API Gateway

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API Gateway
Common Errors
Works in Lambda, but not in API Gateway
Testing in API Gateway:
Status: 502
Response Body:
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{
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  "message": "Internal server error"
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}
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Logs:
Lambda execution failed with status 200 due to customer function error: RequestId: 80572150-944e-40e5-b782-aca7f713289f Process exited before completing request. Lambda request id: 80572150-944e-40e5-b782-aca7f713289f
Solution
Check your lambda function is either:
Make sure you define your handler function async ; or
Use the callback argument in your handler
For example:
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export async function webhook(event, context) {
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  return {
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    statusCode: 200,
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  };
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}
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or
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export function webhook(event, context, callback) {
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  callback(null, { statusCode: 200 });
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}
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Using Custom Domains with Cloudflare
1.
Open AWS ACM Console (us-east-1)
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Click "Request a  Certificate"
2.
Enter the domains you want to enable
2.
Open AWS API Gateway​
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Select "Custom Domain Names" from the left menu.
2.
Click the "Create Custom Domain Name" button.
3.
Enter the "Domain Name"
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Select the ACM Certificate (us-east-1)
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Click "Base Path Mappings"
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Set the relevant path and destination
6.
Hit "Save"
7.
Wait a maximum of 40 minutes
3.
Open Cloudflare​
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Select your domain and open the "DNS" tab
2.
Add a CNAME record
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For "Name":
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Use "@" if you are targeting the root domain. For example "build.my"
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Use "www" if you are targetting a subdomain. For example: "www.build.my"
2.
For "Domain name":
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Use the AWS APIGateway Target Domain Name. For example: "d1jdvkqtea2e81.cloudfront.net"
3.
For Status:
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Set to: DNS Only
Test only on https . Testing on http will redirect to https so it looks like nothing is happening.
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curl --verbose https://dt.cards/
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Pieced from:
​https://stackoverflow.com/questions/36737313/how-to-cname-to-amazon-api-gateway-endpoint​
​http://www.leanx.eu/tutorials/set-up-amazons-api-gateway-custom-domain-with-cloudflare​
​https://medium.com/@bobthomas295/combining-aws-serverless-with-cloudflare-sub-domains-338a1b7b2bd​
​
Notes - Previous
AWS
Cognito
Last modified 2yr ago
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Contents
Common Errors
Works in Lambda, but not in API Gateway
Using Custom Domains with Cloudflare