Nov 26, 2010

QorCMS preview

Qor is the admin tool we build for rails. It's not public released yet but already used by some of our clients. It's like the Django one but only better!

Qor Enterprise CMS Demo from Felix Sun on Vimeo.

Nov 4, 2010

Compiling Google mod_pagespeed on Archlinux

Google released its awesome apache module mod_pagespeed recently. Unfortunately only .deb/.rpm packages are provided officially. For arch user, we have to compile it by ourselves.

Based on google's howto, we need depot_tools to compile mod_pagespeed. There is an aur package depot_tools-svn, but seems not work now because arch switched to python 3.

So I downloaded depot_tools myself and put it in my ~/scripts/depot_tools.

mkdir -p ~/scripts
cd ~/scripts
svn co

To make depot_tools work, you need to switch to python2:

sudo rm /usr/bin/python
sudo ln -s /usr/bin/python2 /usr/bin/python
sudo rm /usr/bin/python-config
sudo ln -s /usr/bin/python2-config /usr/bin/python-config

Next step we download mod_pagespeed source code use depot_tools:

mkdir ~/mod_pagespeed # any directory is fine
cd ~/mod_pagespeed
gclient config
gclient sync --force # this will download all source code

You're ready to compile now.

cd ~/mod_pagespeed/src
make BUILDTYPE=Release # BUILDTYPE defaults to 'Debug'

I got an error when I compile it on my box:

In file included from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/utility:71:0,
from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/algorithm:61,
from ./net/instaweb/util/fetcher_test.h:24,
from ./net/instaweb/util/cache_fetcher_test.h:27,
from net/instaweb/util/
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/bits/stl_map.h:87:5: instantiated from here
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/bits/stl_pair.h:77:11: error: ?std::pair<_t1,>::second? has incomplete type
./net/instaweb/util/public/cache_interface.h:28:7: error: forward declaration of ?struct net_instaweb::SharedString?

After digging a while, I made this patch to fix the error:

Index: net/instaweb/util/public/cache_interface.h
--- net/instaweb/util/public/cache_interface.h (revision 137)
+++ net/instaweb/util/public/cache_interface.h (working copy)
@@ -21,6 +21,7 @@

#include <string>
#include "net/instaweb/util/public/string_util.h"
+#include "net/instaweb/util/public/shared_string.h"

namespace net_instaweb {

ps: I also deployed mod_pagespeed to our centos staging server, the whole process is very smooth. The result is also very impressive: gzip, cache-control, inline assets, etc. etc. all suddenly work like a charm. The only problem is with extend_cache filter: it modified asset name correctly, but when brower send request to those assets, the server reponds with 404 error. I have to disable rewrite_javascript and extend_cache filter to make our sites work correctly:

ModPagespeedDisableFilters rewrite_javascript
ModPagespeedDisableFilters extend_cache