I'm using apache httpd24 to extract the headers from aws cognito and pass it to a JAVA application.

AWS is sending me the following headers:

username email firstname family_name

And my target application has following attributes:

username email firstname lastname

I have a requirement to send the username and email headers with MELLON_ prefix (MELLON_username, MELLON_email). This does not require mod_auth_mellon. When i try to hardcode this

Header add MELLON_username "someuser"
RequestHeader set MELLON_username "someuser"
Header add MELLON_email "someemail@test.com"
RequestHeader set MELLON_email "someemail@test.com"
it works, but when when i try to pass it with the variables coming from cognito, this doesn't work.

For ex:

Header add MELLON_username "expr=%{HTTP:X-Amzn-Oidc-Data}"
RequestHeader set MELLON_username "expr=%{HTTP:X-Amzn-Oidc-Data}"
RequestHeader edit MELLON_username "[^.]*." ""
RequestHeader set MELLON_username "expr=%{unbase64:%{HTTP:username}}" RequestHeader edit MELLON_username "(.*?)(?:\"username\":\")(.*?)(?:\")(.*$)" $2


username gets null with this.

I tried setting this as an env variable with the mod_setenvif module as some other forms suggested, but still no luck. Has anyone come across something like this?

Thanks.

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