Varnish default.vcl for drupal

default.vcl

# A drupal varnish config file for varnish 3.x
#
# Will work with Drupal 7 and Pressflow 6.
#
# Default backend definition.  Set this to point to your content
# server. We are assuming you have a web server running on port 8080.
#
C{
#include <sys/time.h>
#include <stdio.h>
}C
backend default {
    .host = "127.0.0.1";
    .port = "8080";
    .connect_timeout = 600s;
    .first_byte_timeout = 600s;
    .between_bytes_timeout = 600s;
}
#
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;
    }
    C{
      struct timeval detail_time;
	  gettimeofday(&detail_time,NULL);
	  char start[20];
	  sprintf(start, "t=%lu%06lu", detail_time.tv_sec, detail_time.tv_usec);
	  VRT_SetHdr(sp, HDR_REQ, "\020X-Request-Start:", start, vrt_magic_string_end);
    }C
  }

  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);
  }

  ## fix compression per http://www.varnish-cache.org/trac/wiki/FAQ/Compression
  if (req.http.Accept-Encoding) {
    if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") {
      # No point in compressing these
      remove req.http.Accept-Encoding;
    } elsif (req.http.Accept-Encoding ~ "gzip") {
      set req.http.Accept-Encoding = "gzip";
    } elsif (req.http.Accept-Encoding ~ "deflate" && req.http.user-agent !~ "MSIE") {
      set req.http.Accept-Encoding = "deflate";
    } else {
      # unkown algorithm
      remove req.http.Accept-Encoding;
    }
  }

  # Always cache things with these extensions
  if (req.url ~ "\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|swf)$") {
    return (lookup);
  }

  # Do not cache these paths.
  if (req.url ~ "^/status\.php$" ||
      req.url ~ "^/update\.php$" ||
      req.url ~ "^/cron\.php$" ||
      req.url ~ "^/install\.php$" ||
      req.url ~ "^/ooyala/ping$" ||
      req.url ~ "^/admin" ||
      req.url ~ "^/admin/.*$" ||
      req.url ~ "^/flag/.*$" ||
      req.url ~ "^.*/server-status$" ||
      req.url ~ "^.*/ajax/.*$" ||
      req.url ~ "^.*/ahah/.*$") {
    return (pass);
  }

  ## Remove has_js, toolbar collapsed and Google Analytics cookies.
  set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[a-z]+|has_js|Drupal.toolbar.collapsed|Drupal.tableDrag.showWeight)=[^;]*", "");

  ## Remove a ";" prefix, if present.
  set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");

  ## Remove empty cookies.
  if (req.http.Cookie ~ "^\s*$") {
    unset req.http.Cookie;
  }

  # If they still have any cookies, do not cache.
  if (req.http.Authorization || req.http.Cookie) {
    /* Not cacheable by default */
    return (pass);
  }

  # Don't cache Drupal logged-in user sessions
  # LOGGED_IN is the cookie that earlier version of Pressflow sets
  # VARNISH is the cookie which the varnish.module sets
  if (req.http.Cookie ~ "(VARNISH|DRUPAL_UID|LOGGED_IN)") {
    return (pass);
  }

  return (lookup);
}

sub vcl_hash {
  hash_data(req.url);
  if (req.http.host) {
    hash_data(req.http.host);
  } else {
    hash_data(server.ip);
  }
  return (hash);
}

sub vcl_deliver {
  # From http://varnish-cache.org/wiki/VCLExampleLongerCaching
  if (resp.http.magicmarker) {
    /* Remove the magic marker */
    unset resp.http.magicmarker;

    /* By definition we have a fresh object */
    set resp.http.age = "0";
  }

  #add cache hit data
  if (obj.hits > 0) {
    #if hit add hit count
    set resp.http.X-Varnish-Cache = "HIT";
    set resp.http.X-Varnish-Cache-Hits = obj.hits;
  }
  else {
    set resp.http.X-Varnish-Cache = "MISS";
  }

  return (deliver);
}