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In this case, the headers listed in the parameter will be added to 200 OK response:

Mask support in ACAO header

Sometimes, for example, when load balancer AWS LB is used, it is necessary to set request origin address including port in ACAO header sent in response to GET request, for example

Access-Control-Allow-Origin: http://test.flashphoner.com:8081

However, origin address is not always known while configuring the server. Therefore, since build 5.2.755 mask support in ACAO header can be enabled

hls_acao_header_domain_mask=true

This feature is enabled by default. In this case, if '*' character is set in the following parameter

hls_access_control_headers=Access-Control-Allow-Origin: *

server returns ACAO header with full request origin address in response to GET request

Access-Control-Allow-Origin: http://lb.yourdomain.com:8081

This can be disabled if necessary

hls_acao_header_domain_mask=false

Using nginx as reverse proxy for HLS playback

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