Lightning speed WordPress with Lighttpd and Supercache, part II

Giovanni Intini — Mon, 05 May 2008 09:13:44 +0000

There was an error in the code I wrote for my previous post about lighttpd and wp-supercache. If you kept GZip disabled in you wp-supercache configuration, and your browser sent an Accepts gzip header, lightpress would serve the dynamic page (instead of the cached html page).

I did some refactoring and testing, and here’s the current version of rewrite.lua. This one will serve the correct gzipped or text content, while solving another bug with urls ending in ”/”:

function serve_html(cached_page)
  if (lighty.stat(cached_page)) then
    lighty.env["physical.path"] = cached_page
    print("Serving cached page: " .. cached_page)
    return true
  else
    return false
  end
end
 
function serve_gzip(cached_page)
  if (lighty.stat(cached_page .. ".gz")) then
    lighty.header["Content-Encoding"] = "gzip"
    lighty.header["Content-Type"] = ""
    lighty.env["physical.path"] = cached_page .. ".gz"
    print("Serving gzipped page: " .. cached_page .. ".gz")
    return true
  else
    return false
  end
end
 
attr = lighty.stat(lighty.env["physical.path"])
 
if (not attr) then
  lighty.env["uri.path"] = "/index.php"
  lighty.env["physical.rel-path"] = lighty.env["uri.path"]
  lighty.env["physical.path"] = lighty.env["physical.doc-root"] .. lighty.env["physical.rel-path"]
 
  query_condition = not (lighty.env["uri.query"] and string.find(lighty.env["uri.query"], ".*s=.*"))
  user_cookie = lighty.request["Cookie"] or "no_cookie_here"
  cookie_condition = not (string.find(user_cookie, ".*comment_author.*") or string.find(user_cookie, ".*wordpress.*") or string.find(user_cookie, ".*wp-postpass_.*"))
  if (query_condition and cookie_condition) then
    accept_encoding = lighty.request["Accept-Encoding"] or "no_acceptance"
    cached_page = lighty.env["physical.doc-root"] .. "/wp-content/cache/supercache/" .. lighty.request["Host"] .. lighty.env["request.uri"] .. "/index.html"
    cached_page = string.gsub(cached_page, "//", "/")
    if (string.find(accept_encoding, "gzip")) then
      if not serve_gzip(cached_page) then serve_html(cached_page) end
    else
      serve_html(cached_page)
    end
  end
end

Lighttpd and WP-Supercache? Now you can!

Giovanni Intini — Thu, 24 Apr 2008 13:53:45 +0000

Update: there are some bugs with this code. You can find the newest (and best) version here

It’s often said that if you can’t find something in Google it doesn’t exist, and when I couldn’t find a way to serve WP-Supercached pages via Lighttpd I was pretty sure no one had ever published on the net a solution to my problem.

Nice permalinks were easy to fix, thanks to this tutorial, but cache was a no-go: the lighttpd wiki and the wordpress forums had no info, so I had to cook a solution for myself.

It was easier than I thought though:

-- rewrite.lua, in your WP_ROOT
attr = lighty.stat(lighty.env["physical.path"])
 
if (not attr) then
  lighty.env["uri.path"] = "/index.php"
  lighty.env["physical.rel-path"] = lighty.env["uri.path"]
  lighty.env["physical.path"] = lighty.env["physical.doc-root"] .. lighty.env["physical.rel-path"]
 
  query_condition = not (lighty.env["uri.query"] and string.find(lighty.env["uri.query"], ".*s=.*"))
  user_cookie = lighty.request["Cookie"] or "no_cookie_here"
  cookie_condition = not (string.find(user_cookie, ".*comment_author.*") or string.find(user_cookie, ".*wordpress.*") or string.find(user_cookie, ".*wp-postpass_.*"))
  if (query_condition and cookie_condition) then
    accept_encoding = lighty.request["Accept-Encoding"] or "no_acceptance"
    cached_page = lighty.env["physical.doc-root"] .. "/wp-content/cache/supercache/" .. lighty.request["Host"] .. lighty.env["request.uri"] .. "/index.html"
    if (string.find(accept_encoding, "gzip")) then
      if (lighty.stat(cached_page .. ".gz")) then
        lighty.header["Content-Encoding"] = "gzip"
        lighty.header["Content-Type"] = ""
        lighty.env["physical.path"] = cached_page
      end
    else
      if (lighty.stat(cached_page)) then
        lighty.env["physical.path"] = cached_page
      end
    end
  end
end

This rewrite.lua will serve compressed cached pages to those who accept gzip and plain html to those who prefer not to get gzip, while retaining the nice permalinks.

A Tempest of Thoughts » lighttpd

Lightning speed WordPress with Lighttpd and Supercache, part II

Lighttpd and WP-Supercache? Now you can!