Package: nfapws
Table of ContentsIntroductionWhat are Fapws2 and Fapws3 about ?Why a new python web server ?Philosophy:How to install fapws?Pre-requisit:Install fapws:How to use Fapws ?How to get news about Fapws?Where it can run?This README file was originally written by William, the author of
fapws3, and modified by Wu Zhe, the maintainer of nfapws python
package to detail some installing instructions.IntroductionThis is a python web server using the wonderfull libevhttp://software.schmorp.de/pkg/libev.htmllibrary. Thus this is yet an another asynchronous web server like
Medusa, Twisted, Apricot.  And Fapws is a WSGI compliant web server.What are Fapws2 and Fapws3 about ?Fapws1, Fapws2 and Fapws3 are “internal” project’s name. The rename
correspond to a full re-write.In the begining I made Fapws1, a Python extension based on the Apricot
code. Then, quickly comes the need to have much more features in it,
and I’ve called it Fapws2. Fapws1 has never been published.  Fapws2 is
rebuild based on the http library of libevent. Works great, but I’ve
been forced to modify the evhttp_handle_request. Despite seevral mails
to the libevent mailing list, no one was agreed to accept my patch to
the http code of libevent. Thus, or use use it with libevent <1.3e or
you must change the code of libevent before using it for Fapws. This
is not a so good way of working ;-(.  Than comes Fapws3, a rebuild of
Fapws2 without dependencies to http’s API of libevent. At that moment
Marc Lehmann posts, in the libevent mailinglist, a mail describing the
creation of a “new” and optimized event’s library similar to libevent.
Because the code was much more clean to me and because the
documentation providedhttp://pod.tst.eu/http://cvs.schmorp.de/libev/ev.podwas very clear, I’ve decided to give it a try.Support for Fapws2 will be strictly limited to bug fixing. My current
work will be focused on Fapws3.Why a new python web server ?In that case, the usual question is why an new one ? In short, the
answer is because it sounds that Apricot is not more maintained, and
because Medusa and Twisted can not go as fast as Apricot. Indeed,
after several pure performance tests it appears that, thanks to the
libevent library used in Apricot, is the fastest python web server.But that not the only reason. Personnally, I prefer event’s web
server. Indeed, such architecture gives more performant web server and
with a much more limited memory foot print. You can easly install them
a memory limited machines (like VDS for example).Philosophy:Fapws must stay the most simple web server and the fastest. Thus the
core of the application is quite limited. Every additional feature
will be placed inside a “contrib” sub-directory. This is valontary for
disk space “foot print” reasons. Thus Fapws must also facilitate the
disk utilisation.How to install fapws?Pre-requisit:Python with header files, version >= 2.4, (in Debian,sudo aptitude install pythonpython-dev)Libev with header files, version >= 3.49 (in Debian,sudo aptitude install libev3libev-dev)WARNING:To avoid conflicts with the previous version (called Fapws2), better
to remove it before installation of the new one.Install fapws:sudo easy_install nfapwsHow to use Fapws ?Using Fapws is quite simple and can be done in 4 major steps:You define the main parameters of your webserve with the method
“start” and the method “base”. Unless you really know what you are
doing, I strongly suggest to use the “base” module provided within
the package.You define you WSGI python callbacks.You link the URL patht he the python callbacks previously created.You start you webserver by triggering the “run” method.As describbed in the Libev documentation, you can controle the
Event Loop used. By default Libev estimate what’s the best one for
your architecture, but you can overwrite this selection by using
the environment variable: LIBEV_FLAGS.  Choices are: 1=select,
2=poll (everywhere except windows), 4=epoll (Linux), 8=kqueue (BSD
clones), 16=devpoll (solaris 8), 32=port (solaris 10)For more help, check the samples.How to get news about Fapws?You will find information concerning Fapws on my own blog:http://william-os4y.livejournal.com/Where it can run?Theoritically anywhere where both Python and Libev are running.Have fun with Fapws.William