Server Festa 2013 Autumn backend Varnish default.vcl

svfes201311_backend_default.vcl

import std;
import memcached;
import curl;
import parsereq;
import throttle;
import header;

backend default {
  .host = "127.0.0.1";
  .port = "8080";
}

backend wppost {
  .host = "base";
  .port = "8081";
}

sub vcl_recv {
    parsereq.init();

    if (req.url ~ "^/(wp-content/themes/|wp-includes/js)") {
        unset req.http.cookie;
    }

    if (req.url ~ "^/ban" ) {
        error 200 "ban!";
    }

    if (req.url ~ "/wp-comments-post.php.*" && req.request == "POST") {
        set req.backend = wppost;
        unset req.http.cookie;
        return (pass);
    }

    if (req.url ~ "^/\?page_id=.*") {
    }

    if (req.url ~ "^/\?p=.*") {
        unset req.http.cookie;
    }

    if (req.url ~ "^/redirect" ) {
    }

    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;
        }
    }
    if (req.request != "GET" &&
      req.request != "HEAD" &&
      req.request != "PUT" &&
      req.request != "POST" &&
      req.request != "TRACE" &&
      req.request != "OPTIONS" &&
      req.request != "DELETE") {
        /* Non-RFC2616 or CONNECT which is weird. */
        return (pipe);
    }
    if (req.request != "GET" && req.request != "HEAD") {
        /* We only deal with GET and HEAD by default */
        return (pass);
    }
    if (req.http.Authorization || req.http.Cookie) {
        /* Not cacheable by default */
        return (pass);
    }
    return (lookup);

}

sub vcl_fetch {
    set beresp.http.x-url = req.url;

    if (req.url ~ "^/?p=.*") {
        unset beresp.http.set-cookie;
        set beresp.ttl = 120s;
    }

    if (req.url ~ "^/(ban)" ) {
#        set req.backend = default;
        set beresp.ttl = 0s;
    }

    if (req.url ~ "/wp-comments-post.php.*" && req.request == "POST") {
        unset beresp.http.set-cookie;
        header.append(beresp.http.Set-Cookie, "comment_author_26f1ea38dbef3c2503ce207774eb83dd=Cloud+Server+Festa+Bench; expires=Sun, 02-Nov-2014 11:41:03 GMT; Max-Age=30000000; path=/");
        header.append(beresp.http.Set-Cookie, "comment_author_email_26f1ea38dbef3c2503ce207774eb83dd=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/");
        header.append(beresp.http.Set-Cookie, "comment_author_url_26f1ea38dbef3c2503ce207774eb83dd=http%3A%2F%2Fserverfesta.info%2F; expires=Sun, 02-Nov-2014 11:41:03 GMT; Max-Age=30000000; path=/");

        set beresp.ttl = 0s;
    }

    if (beresp.ttl <= 0s ||
        beresp.http.Set-Cookie ||
        beresp.http.Vary == "*") {
               /*
                * Mark as "Hit-For-Pass" for the next 2 minutes
                */
                set beresp.ttl = 120 s;
                return (hit_for_pass);
    }
    return (deliver);

}

sub vcl_deliver {
    if (obj.hits > 0) {
        set resp.http.X-Cache = "HIT";
    } else {
        set resp.http.X-Cache = "MISS";
    }

    if (req.url ~ "^/ban" ) {
        set resp.http.ban = "v1";

        ban("obj.http.x-url == /");
        ban("obj.http.x-url ~ /\?page_id=");
        ban("obj.http.x-url ~ /\?p=");
    }

    if (req.url ~ "/wp-comments-post.php.*" && req.request == "POST") {
        set resp.http.page = parsereq.post_header("comment_post_ID");
        set resp.http.x-insert = "http://localhost:8080/insert?" + "comment_post_ID=" +
            resp.http.page + "&comment_author=" + parsereq.post_header("author") +
            "&comment_author_email=EMAIL" + "&comment_author_url=" + parsereq.post_header("url") +
            "&comment_author_IP=127.0.0.1" + "&comment_content=" + parsereq.post_header("comment") +
            "&comment_karma=0" + "&comment_approved=1" + "&comment_agent=varnish" + "&comment_type=0" +
            "&comment_parent=0" + "&user_id=0";
            
        ###memcached.servers("base");
        ###set resp.http.count = memcached.incr(resp.http.page, 1);

        ban("obj.http.x-url == /");
        ban("obj.http.x-url ~ /\?page_id=");
        ban("obj.http.x-url ~ /\?p=");
        curl.get("http://svfes02/ban");
        curl.get("http://svfes03/ban");
        curl.get("http://svfes04/ban");

        unset resp.http.x-insert;

        set resp.http.Content-Type = "text/html";
        set resp.http.Cache-Control = "no-cache, must-revalidate, max-age=0";
        set resp.http.Pragma = "no-cache";
        set resp.http.Expires = "Wed, 11 Jan 1984 05:00:00 GMT";
        set resp.status = 302;
        set resp.response = "Found";
    }

    return (deliver);

}