runit varnish

gistfile1.txt

#!/bin/bash -e

. ../../bootstrap

PORT=$(basename "$(pwd)"|awk -F- '{print $2}')
BACKEND_PORT=$(basename "$(pwd)"|awk -F- '{print $3}')

TEMP_BASE_DIR=/var/tmp/${USER}-varnish-${PORT}
VARNISH_NAME=$TEMP_BASE_DIR
if [ ! -d "$TEMP_BASE_DIR" ]; then
  mkdir -p "$TEMP_BASE_DIR";
  chmod og-rwx "$TEMP_BASE_DIR";
fi

cat <<EOF > varnish.conf
vcl 4.0;
backend default {
  .host = "127.0.0.1";
  .port = "$BACKEND_PORT";
}

# only allow purging of cache from localhost
acl purge {
  "127.0.0.1";
}

sub vcl_recv {
  # Normalize accept-encoding headers: http://www.varnish-cache.org/docs/trunk/tutorial/vary.html#tutorial-vary
  if (req.http.Accept-Encoding) {
      if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)\$") {
          # No point in compressing these
          unset req.http.Accept-Encoding;
      } elsif (req.http.Accept-Encoding ~ "gzip") {
          set req.http.Accept-Encoding = "gzip";
      } elsif (req.http.Accept-Encoding ~ "deflate") {
          set req.http.Accept-Encoding = "deflate";
      } else {
          # unknown algorithm
          unset req.http.Accept-Encoding;
      }
  }
  # Strip non-application cookies from the requests, e.g. cookies set by Google Analytics
  if (req.http.cookie) {
    # Remove has_js and Google Analytics __* cookies.
    set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[_a-z]+|has_js)=[^;]*", "");
    # Remove a ";" prefix, if present.
    set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");
    if (req.http.cookie ~ "^ *\$") {
      unset req.http.cookie;
    }
  }
  # The regex used here matches the standard rails cache buster urls
  # e.g. /images/an-image.png?1234567
  if (req.method == "GET" && req.url ~ "(-\d+)?\.(css|js|jpg|jpeg|gif|ico|png)\??\d+\$") {
    unset req.http.cookie;
  }

  # Stripping certain params, e.g.
  # utm_* - analytics campaign tracking tags
  if (req.url ~ "\?") {
     set req.url = regsub(req.url, "\?(ref|scp|sq|st|src|utm_[a-z_]+)(\=[^&]*)?", "?");
     set req.url = regsuball(req.url, "&(ref|scp|sq|st|src|utm_[a-z_]+)(\=[^&]*)?(?=&|\$)", "");
     set req.url = regsub(req.url, "\?&", "?");
     set req.url = regsub(req.url, "\?\$", "");
  }

  if (req.http.Authorization || req.http.Cookie) {
    return (pass);
  }

  if (req.method != "GET" && req.method != "HEAD") {
    if (req.method == "PURGE") {
      if (!client.ip ~ purge) {
        return (synth(405, "Not allowed."));
      }
    }
    return (pass);
  }
  return (hash);
}

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

exec varnishd -a "127.0.0.1:$PORT" -F -f varnish.conf -s "file,$TEMP_BASE_DIR/data,512MB" -n "$VARNISH_NAME" 2>&1 || echo "do you need to create the symlink '$BASE/varnishd?'"