vcl 4.0;
import std;

backend pleroma {
    .host = "192.168.10.91";
    .port = "4000";
}

sub vcl_recv {
    # Pleroma should not get cached unless it's media
    if (req.http.host ~ "social.cheesebsd.com") {
        set req.backend_hint = pleroma;
        if (req.http.upgrade ~ "(?i)websocket") {
            return (pipe);
        }
        if ((req.url ~ "^/(media|static)/") ||
        (req.url ~ "(?i)\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|svg|swf|ttf|pdf|woff|woff2)$") ||
        (req.url ~ "^/api/v1/statuses/.*/context")) {
          unset req.http.Cookie;
          unset req.http.Authorization;
          return (hash);
        }
    }
}

sub vcl_backend_response {
    # etags are bad
    unset beresp.http.etag;

    # Default object caching of 86400s;
    set beresp.ttl = 86400s;
    # Allow caching for 6h in case backend goes down
    set beresp.grace = 6h;

    # Do not cache 5xx responses
    if (beresp.status == 500 || beresp.status == 502 || beresp.status == 503 || beresp.status == 504) {
      set beresp.uncacheable = true;
      return (abandon);
      #return (retry);
    }

    # Do not cache redirects and errors
    if (beresp.status >= 300) {
        set beresp.uncacheable = true;
        set beresp.ttl = 30s;
        return (deliver);
    }

    if (bereq.backend == pleroma) {
        if ((bereq.url ~ "(?i)\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|svg|swf|ttf|pdf|woff|woff2)$") ||
        (bereq.url ~ "^/api/v1/statuses/.*/context") ||
        (bereq.url ~ "^/api/v1/custom_emojis"))
        {
          set beresp.ttl = 86400s;
          unset beresp.http.set-cookie;
          unset beresp.http.Cache-Control;
          unset beresp.http.x-request-id;
          set beresp.http.Cache-Control = "public, max-age=86400";
        }
    }
}

sub vcl_pipe {
    if (req.http.upgrade) {
        set bereq.http.upgrade = req.http.upgrade;
        set bereq.http.connection = req.http.connection;
    }
}