How to add header conditional on an upstream_http_ variable in Nginx?
Issue
- I want to add the Access-Control-Allow-Origin in Nginx only if it's not already set by the upstream.
- How to add the Strict-Transport-Security header in Nginx if the response is not having the same response header set already?
Environment
- Red Hat Software Collections (RHSCL)
- rh-nginx120 (nginx 1.20.1)
- rh-nginx118 (nginx 1.18.0)
- rh-nginx116 (nginx 1.16.1)
- Red Hat Enterprise Linux 8,9 (RHEL) (Application Streams)
- v1.20
- v1.18
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