AWS - getting API-Gateway apiID from lambda name

Question

I have a lambda which should be invoked from a public URL (through API-Gateway - no authorization needed)

I know I can fetch public URL by calling awsSdk.apiGateway.getApi(apiId)

So I need to get apiId from somewhere. I've heard that it's possible to fetch api-id by lambda-name, but I can't find it in docs.

Is it really possible? the alternative is to keep api-id in my app's config (instead of lambda-name)

Marcin · Accepted Answer · 2021-02-03 10:41:46Z

3

Just by using a lambda name, you can't get apiId. Maybe what you heard is that in the lambda you can get the apiId and then return it to the caller. This would make sense as apiId is part of the event object that API gateway passes to the lambda function with each request.

To get the apiId from lambda name only, you would have to develop your own custom solution for that. This would still be problematic, because a single lambda can be associated with multiple APIs, thus you would probably have to account for that as well.

The simplest way to develop such a solution would be to store associations between APIs and its lambda functions in, e.g. DynamoDB table, and query the table when needed to get the apiId based on lambda name only.

answered Feb 3, 2021 at 10:41

Marcin

241k16 gold badges315 silver badges368 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Cyril G. · Accepted Answer · 2021-02-03 10:41:34Z

1

if your lambda is used with proxy integration, you can retrieve the ID in the input data as explain on this page

"requestContext": {
  ...
  "apiId": "gy415nuibc"
},

answered Feb 3, 2021 at 10:41

Cyril G.

2,0252 gold badges7 silver badges21 bronze badges

Collectives™ on Stack Overflow

AWS - getting API-Gateway apiID from lambda name

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related