#
# This is an example VCL file for Varnish.
#
# It does not do anything by default, delegating control to the
# builtin VCL. The builtin VCL is called when there is no explicit
# return statement.
#
# See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/
# and https://www.varnish-cache.org/trac/wiki/VCLExamples for more examples.

# Marker to tell the VCL compiler that this VCL has been adapted to the
# new 4.0 format.
vcl 4.0;

# Default backend definition. Set this to point to your content server.
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}

sub vcl_recv {
    if (req.restarts == 0) {
        if (req.http.x-forwarded-for) {
            set req.http.X-Forwarded-For =
                req.http.X-Forwarded-For + ", " + client.ip;
        }
        else {
            set req.http.X-Forwarded-For = client.ip;
        }
    }
}

sub vcl_backend_response {
    set beresp.ttl = 2h;
    set beresp.grace = 24h;

    if (bereq.url ~ "\.(bmp|ejs|jpeg|pdf|ps|ttf|class|eot|jpg|pict|svg|webp|html|htm|css|eps|js|pls|svgz|woff|csv|gif|mid|png|swf|woff2|doc|ico|midi|ppt|tif|xls|docx|jar|otf|pptx|tiff|xlsx|php|mp3)$") {
        set beresp.ttl = 1y;
        set beresp.grace = 24h;
    }
}

sub vcl_deliver {
    # Happens when we have all the pieces we need, and are about to send the
    # response to the client.
    #
    # You can do accounting or modifying the final object here.
}