AWS ApiGateway Host header & Custom domain name

Question

When using AWS::ApiGateway::DomainName, it creates hidden CloudFront distribution to actually fetch custom domain name. The problem is that when passing original request down to something like ELB, original headers are lost, including Host header. I need Host header in my application that is deployed in ECS.

Possible solution is to create Lambda@Edge function that adds X-Forwarded-Host header and maps it to the value of Host header. The problem is that I cannot figure out how to create Lambda Function Association on hidden Cloudfront distribution that ApiGateway creates.

Is there actually a possibility to have Host header preserved in ApiGateway with Custom Domain name setup, as for now?

Just with any header you want sent to the origin, you need to configure it to be passed in API gateway. — Steve Buzonas, Aug 15 '18 at 15:09
Thank you. All I needed was to add Host header in Resources => HTTP Request Headers. — astrosmash, Aug 16 '18 at 08:58

score -2 · Answer 1 · answered Aug 21 '18 at 13:26

-2

You can whitelist any header to be sent to the origin. Configure the Host header for forwarding in your API Gateway configuration.

answered Aug 21 '18 at 13:26

Steve Buzonas

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AWS ApiGateway Host header & Custom domain name

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