push_stream_header_template_file
The `push_stream_header_template_file` directive specifies a template file to be used for generating headers in push stream responses.
Description
The push_stream_header_template_file directive allows users to set a custom template file that defines how headers should be formatted in HTTP responses managed by the NGINX Push Stream Module. By using this directive, one can enforce a consistent header structure across different push streams, improving the control over response headers sent to subscribers. This is particularly useful when managing metadata or additional contextual information that needs to be included in streamed updates.
The parameter for this directive is the file path to the template file, which should contain valid template syntax recognized by the NGINX push stream server. When this directive is applied in an http, server, or location context, the content of the specified file is read and processed at runtime to create the output headers. As different contexts may dictate different header formats and behaviors, this flexibility enables granular control depending on the server's needs or the specific locations of the push streams.
When utilized correctly, this directive enhances the capability of the Push Stream Module, promoting better integration with various client applications by allowing tailored header responses suitable for different use cases. Users should ensure that the template file is readable by the NGINX worker processes for successful implementation.
Config Example
http {
push_stream_header_template_file /etc/nginx/templates/push_headers.conf;
server {
location /pub {
push_stream_publisher admin;
push_stream_channels_path $arg_id;
}
location ~ /sub/(.*) {
push_stream_subscriber;
push_stream_channels_path $1;
}
}
}Ensure the template file exists and is accessible to the NGINX user.
Incorrect template syntax may lead to unexpected results or server errors.
If the template file is modified, NGINX may require a reload to apply changes.