Hi,
the reasons why i did this:
1) i wanted to have a simple webserver to get my son involved in
programming an online game, and he knows already a little bit javascript
2) my hobby is programming in c++ and javascript, but at work i have to
code in c#, so i just wanted to have some fun :-)
i think its no a new idea, ive seen some webservers using javascript as
backend language, but everything i found was to complicated to
install/use or to complicated to port to a new hw-platform (i want to
run it on my linksys-nslu2 with ftpd to my topfield hd-vcr to program
the recordings via web).
and i like sqlite very much and no webserver i found had this combination.
if you look at my code, you see that i just use
*) sqlite
*) the javascript-engine from mozilla (very advanced: js v1.7 including
xml support...),
*) some glue code to access sqlite and a simple http server from js
(only one file: gas.cpp)
the trick between js and sqlite is like yours: every sql statement
executed returns a 2-dim array...
one thing is maybe iteresting: the class "DBItem". its a kind of (very
simple) or-mapper.
it maps the properties of a javascript-object to the columns of a table.
here is a code example:
var db = new Database("user.sdb");
db.exec("create table if not exists user (id integer primary key
autoincrement, name varchar unique, pwd varchar, test varchar)");
var user = new DBItem(db, "user");
user._name = "Guenter";
user._pwd = "FooBar1234567890";
user._test = "blubb";
user.flush();
var id = user._id;
var user = new DBItem(db, "user", id);
print("name="+user._name+"\n");
//db.exec("delete from user where id="+id);
if you are still curious (or anyone else ?), i can send you the actual
source by mail. :-)
btw: i had a look into your http-source: looks nice, but its maybe to
complicated to implement my features like http-multipart-posts.
cu, gg
John Stanton schrieb:
The multi-threaded application/www server I described requires no
threading involvement from the application programmer. That
programmer uses SQL, HTML, Javascript and the application language we
call MUV. Think about it, when you use Apache you don't have to be
aware of its internal threading.
The only significant synchronisation element is to do with multiple
users of Sqlite, and that is handled transparently to the application
programmer.
What I was curious about was your statement that you used Javascript
as a backend. Do you have a novel idea there? For example my
application language will, inter alia, populate Javascript arrays from
an SQL statement. Do you have any such features or something more
ingenious? (I still cannot get access to your server).
My application server runs on Win98, Win2000/XP, Linux, AIX 4.2 and
5.3. The executive, fileserving, compression and CGI components are
realised in less than 20K of code. HTML V2 is implemented.
There are some old fragments of this program at
http://www.viacognis.com/muvm. If you are interested I can dig out
the current code and let you have it.
Günter Greschenz wrote:
Hi,
normally i like multithreading, but in this case i like the simple
approach (at least for rendering the pages), because as application
programmer (the guy who will develop the apps in javascript) its much
easier if you dont have to think about locks, racing conditions and
other pitfalls. and the rendering itself is (depending on what you
do, of course) fast enough for me (simple pages need <10ms !). I want
to multithread the upload to the client after all work is done.
in my current implementation the complete server is blocked until the
download is finished. in my logfiles i have entries with 25 minutes
(see "http://greschenz.dyndns.org/logsByTime.html";) !!! thats really
unacceptable !
could you mail me some samples howto multithread portable (linux &
win32) ?
cu, gg
John Stanton schrieb:
Gunter,
I recently wrote a multi-threaded portable web server in simpl ANSI
C. It uses Win32 threads or pthreads. It caches threads and re-uses
them on a most recently used basis. Efficiency is obtained by using
TransmitFile (Win32) or sendfile (Unix).
The logic is simple for an efficient, multi-threaded www server.
An added bonus of mutli-threading is that it takes advantage of the
ability of a browser to open multiple concurrent connections and
persistent connections.
My WWW server is set up as an application server, with embedded
Sqlite and an embedded byte-coded metalanguage used to define DHTML
pages. An associated compiler produces the byte code. By using
compiled byte code the overhead of interpreting a script-type
language is avoided.
Günter Greschenz wrote:
Hi,
yes i know, the problem is, its single-threaded (because of
protability), so if anyone starts a download with a slow
connection, the server is blocked for other connections.. im still
thinking about this problem... single-threading whle rendering th
pages and multithreading for sending them to the clients, or maybe
async socket writes (is this possible in linux ?)
but i've seen (in the logs :-) a lot of people are interested. its
funny to sit at the console at home and see the log messages when
anyone comes by...
at the moment its just an alpha-version... but if i have more time
(or maybe anyone helps me) it will improve !
the server itself is an i386-linux at ~ 300mhz, so dont expect too
much ...
Fred Williams schrieb:
What'ch got it running on, a 286? Tried three different times and
got
tired waiting all three times :-(
Not going to stir much interest with response times like that!
-----Original Message-----
From: Günter Greschenz [mailto:[EMAIL PROTECTED]
Sent: Monday, October 09, 2006 12:04 PM
To: sqlite-users@sqlite.org
Subject: [sqlite] new sqlite-based webserver
hi,
i dont know if anyone is interested in my new open source project...
i implemented a little webserver with javascript as backend-language
(1.7 from mozilla 2.0.rc1) and sqlite as datastorage (3.3.7)
the server is serving himself on "http://greschenz.dyndns.org"; :-)
the source can be downloaded at
"http://greschenz.dyndns.org/download/gas/";
its compilable with gcc(linux) and vs2005(win32)
please send me any comments / ideas...
cu, gg
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