AWS Route 53 wildcard subdomain with Api gateway
From amazon route53 docs: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DomainNameFormat.html
Using an Asterisk (*) in the Names of Hosted Zones and Records You can create hosted zones that include * in the name. Note the following:
You can't include an * in the leftmost label in a domain name. For example, *.example.com is not allowed.
If you include * in other positions, DNS treats it as an * character (ASCII 42), not as a wildcard.
You can also create records that include * in the name. DNS treats the * character either as a wildcard or as the * character (ASCII 42), depending on where it appears in the name. Note the following restrictions on using * as a wildcard in the name of records:
The * must replace the leftmost label in a domain name, for example, .example.com. It can't replace any of the middle labels, for example, marketing..example.com.
The * must replace the entire label. For example, you can't specify prod.example.com or prod.example.com.
You can't use the * as a wildcard for records that have a type of NS.
For records, if you include * in any position other than the leftmost label in a domain name, DNS treats it as an * character (ASCII 42), not as a wildcard.
After that you can get the subdomain of the request within your API and perform a certain action for it, e.g., select a user by username using subdomain.
EDIT:
Unfortunately AWS API Gateway does not support wild-card subdomain name as we can see in the first point of this link:
Api Gateway Known Issues
EDIT 2: Now the AWS API Gateway has support for wild-card subdomains: API Gateway Wild Card sub domain Thanks @justin tailor
As mentioned, API Gateway doesn't support wildcard domains.
However, you can achieve the same thing with a load balancer (though it costs ~$17/month).
- Under EC2 > Load balancers, create an ALB
- Point it to your lambda function
- In Route53, set up *.yourdomain.com as an A alias to the ALB
Wildcard custom domains are now supported by AWS API Gateway.
https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-custom-domains.html#wildcard-custom-domain-names