AltME groups: search

Once Gabriele has this working we'll port it later this year to Rebservices. 
Then you can do stuff like lightweight grid computing, presence, 
file sharing, signaling for other applications (I am thinking of 
ad-hoc VPNs) in just a few lines of code. With NAT/firewall traversal 
out of the box.

why less trivial - would file sharing be tricky with Chord?

No, the other way around: file sharing is a trivial, worn-out, legacy 
p2p application.

Looks like i don't need that util after all.  My host located a 500Mb 
movie file uploaded by a hacker a couple of weeks ago .. must be 
at the same time my site got defaced.

What is faster, reading a 100 byte text file, or accessing 100 bytes 
from a DB?

after a text file being read from a directory is another db operation.

Forced to reduce the number of iterations to 100 for mysql sake.. 
and even then it would choke 50% of the time.. results.. 


Reading the DB used mysql-protocol.r with join mysql://.. localhost 
{select email from table where name='name' }
Reading the file used a: load %file.txt, b: select a 'email
mysql - 1.35 seconds (using time/now/precise

file - 0 seconds (timestart - 18:35:25.531, timefinish - 18:35:25.531)


Conclusion.. no contest.. loading and selecting from file wins hands 
down.

10000 iterations using the load file method.. 0:00:00.781

Took about 6 mins to move the directory.   So it appears to be a 
trade off.
Benefits of using files... 

- much more flexible (ie: a 10mb binary file in a DB is not a good 
idea)
- easier to manipulate.
- magnitude faster access time

the magnitude faster time breaks down pretty quickly when you need 
to retrive a file based on it contents not its title

No, my experiments were using the file AND it's contents via SELECT

so if you only have one row  what is the difference between athe 
fontents of a given file and its name?

the contents of the file, and the row inthe DB were identical.. a 
word °email°, and an email address

in the file system the file name is a key and the contents a value

Does anyone know if REBOL works on WINPE (Windows pre-installation 
environment)?  If so, is there a way to access the Hard Drive to 
do file recover operations with REBOL?

especially since it didn't even change the content of the user.r 
file... but now it accepts it?

I have a slightly modified help, that does not evaluate functions 
in objects and ports and that also dumps ports like objects.
>> a: open http://www.rebol.com
connecting to: www.rebol.com
>> help a
A is a port of value:
   scheme          word!     HTTP
   host            string!   "www.rebol.com"
   port-id         integer!  80
   user            none!     none
   pass            none!     none
   target          none!     none
   path            none!     none
   proxy           object!   [host port-id user pass type bypass]
   access          none!     none
   allow           none!     none
   buffer-size     none!     none
   limit           none!     none

   handler         object!   [port-flags open-check close-check write-check 
   ini...
   status          word!     file
   size            integer!  0
   date            date!     6-Nov-2006/21:26:44
   url             string!   "http://www.rebol.com/"

   sub-port        port!     make port! [ scheme: 'tcp host: "www.rebol.com" 
   po...
   locals          object!   [list headers querying]

   state           object!   [flags misc tail num with custom index 
   func fpos i...
   timeout         integer!  30
   local-ip        none!     none
   local-service   none!     none
   remote-service  none!     none
   last-remote-service none! none
   direction       none!     none
   key             none!     none
   strength        none!     none
   algorithm       none!     none
   block-chaining  none!     none
   init-vector     none!     none
   padding         none!     none
   async-modes     none!     none
   remote-ip       none!     none
   local-port      none!     none
   remote-port     none!     none
   backlog         none!     none
   device          none!     none
   speed           none!     none
   data-bits       none!     none
   parity          none!     none
   stop-bits       none!     none
   rts-cts         logic!    true
   user-data       none!     none
   awake           none!     none

Is there interest in including in the new release?

I had issues with a license key file at one point. I think Cindy 
said things changed, so it could be an issue with a specific license 
key.

the first result can be obtained e.g. by starting a fresh REBOL console 
first and then type in the expression

the second one can be obtained in Windows by defining a Do action 
for .r files as follows:

    C:\Rebol\sdk-2-6-2\tools\rebview.exe "%1"


and then right-clicking on a file containing just a REBOL header 
and the above mentioned expression and picking the Do command

you can define the action in Windows explorer, check registered file 
types

resize-image: func [
	dest [file!]
	size [pair!]
	file [file!]
	/local im
][	
	im:		load-image file
	save/png 	dest to-image layout [origin 0x0 image (im) (size)]
	im:		none
]

This is a problem that has occurred since View 1.2.100 or before 
(but seems not a problem in View 1.2.48 or 1.2.54)
I see a difference between these two:
	request-file/keep
	request-file/keep/file %hello

The first one remembers the directory of previous invocations, but 
the second one doesn't.

I think when the /FILE refinement is used, it just ignores the previous 
directory, reasoning that the user is passing in the "current directory" 
via %hello
That seems simplistic.

I would prefer if REQUEST-FILE would check the /FILE refinement's 
NAME argument to see if it contains a path or is just a single file.
When it is a path, then it is OK to use it.

When it is just a single file, then it should use the previous directory.

An issue raised by Joe in Core group 26-Nov-2006:
	launch {my-script.r param}

Joe wanted param to be parsed out and appear in system/script/args, 
however, it looks like instead the whole string is converted to a 
file and rebol tries to DO it.

:-) I don't know. I kept notes in a file, but don't feel it's developed 
enough to publish. I have a vague desire for a new function which 
handles this case (as well as other, more general, set operations).

this is an annoyance ... but 'to-local-file drops the trailing slash 
for directories

>> probe info? %script.r/
make object! [
    size: 3405
    date: 12-Sep-2000/21:40:20+2:00
    type: 'file
]

>> read %script.r/
** Access Error: Cannot open /C/Dev/REBOL/script.r/
** Near: read %script.r/

Shoudn't INFO? return none (or an error) in this case ?

If it's Windows, then I expect internally rebol just does this:
>> to-local-file %user.r/
== "user.r"

stripping the final slash before accessing the file-system.

Well I don't think it's weird anymore.   make port! on %file/  uses 
scheme: 'directory
make port! on %file  uses scheme: 'file

The issue I wanted to point out is just that if it's an existing 
file!, I should be able to read it ! So instead of letting the user 
wrongly think that's a file, and let 'read pop an error (which sounds 
illogical to me), I'm proposition to signal in 'info? that something 
is wrong with that file! value.

specs: info? a-file
if specs/type = 'file [
	probe read a-file
]

** Access Error: Cannot open /C/Dev/REBOL/script.r/
** Near: read a-file

Here's what I have so far. (Note, this code may end up in another 
file.)
http://anton.wildit.net.au/rebol/patch/caret-to-offset-patch.r

Yes, it allows us to package metadata: extended file attributes in 
our file system

Way back when AtheOS was still on FAT you could have installed from 
some other system, but now with our own file system you need to boot 
Syllable itself

You can do that to shuffle the base zip file to where you need it, 
but eventually you'll have to unpack that to a native Syllable partition

No, since AtheOS 0.1 or something you need to boot from an AFS partition. 
The live CD partly runs from an ISO9660 file system, but that doesn't 
help you any. The point is that a complete system needs to be installed 
on AFS and the only OS with an AFS driver is Syllable, so you have 
to boot Syllable to install Syllable

About access to filesystem: Can that work on an image-file? then 
copying the image to the target-system?

Yes, it's easy to mount a disk image file in Syllable; the virtual 
file system doesn't need a loopback device for that as in Linux. 
However, I don't see how that is going to help you here

I port afs to linux, to write in an image-file. Then i put it on 
the real hd thru linux and network. then i have an afs-partition 
:)

Wow, sounds cool. By the way, I was just looking at Minix3 with it's 
micro-kernel, and I wondered what kind of kernel Syllable has. I 
found this Syllable FAQ:
What kind of kernel design does Syllable use?

As Syllable is a fork of the AtheOS operating system, the author 
of AtheOS (Kurt Skauen) said "I often ask myself that question too. 
The kernel is very modular and it has a well-defined interface between 
the kernel and its device drivers and file systems. Given that each 
component communicates through a thin, well-defined interface and 
each component does not know much about the others, it resembles 
a micro-kernel. I am not sure if this is the right term though, since 
all kernel components live in kernel-space and are not protected 
from each other, and these are all properties of a monolitic kernel. 
I am a bit confused :)"

That's right, Syllable is not Unix. Indeed there is no /mnt directory. 
There could be, and like Unix, volumes can be mounted anywhere in 
the file tree, but the convention is to mount volumes in the root: 
/

That was a short experiment.   I tried to open up the file in Ubuntu, 
and it said it was an unrecognized file type ( .7z ).

Wouldn't it be simpler to just provide the file in a format that 
most systems understand without having download another piece of 
software just for this purpose .. which then ruins the advantage 
of using an obscure compression system because you save a few bytes?

How much extra would a zip file cost?  .001 cents ?

Also, I have the file being served as a torrent on my PC .. I've 
not seen a single torrent client access it.

yes I right clicked and saved file without the htm extension.

How big is the file that you get?

That's the one. But it's a .bz2 file, compressed with BZip2

Maybe the bz2 extensions comes through if you don't remove the htm 
extension, or maybe IE would have unpacked the file for you. IE is 
weird with that

This release focuses on making the system usable for running a number 
of standard servers, and several innovative REBOL servers.


The development files of the system, program headers, static libraries 
and development documentation, were moved to a separate area in /system/development/ 
and are now shipped in a separate package. If you want to compile 
software on Syllable Server, you need to install and register this 
package. The development files need to match the system: you can't 
use a package of any other Syllable version. (You will also need 
to install the Developer's Delight package collection and possibly 
other packages.)


User directories were moved from /home/ to /users/. Resource packages 
are in the process of moving from /usr/ to /resources/. /resources/ 
is currently a symbolic link to /usr/ so that resource packages will 
work from both places during the migration.


Many fixes were made, including more fixes for the CUPS print server 
and GhostScript. Creation of extra user accounts is possible now.


Many packages were updated, including the Linux kernel, IPTables, 
the GCC libraries, OpenSSH, SDL and QEmu. DirectFB was not upgraded 
due to incompatibility with Links2.


CDRTools were included for burning CDs, and the NetCat networking 
tool and the Transmission BitTorrent client were added.


In addition to the Syllable-specific early initialisation scripts 
(in the early-init subdirectory of packages), the late initialisation 
scripts (in the init subdirectory of packages) are now also executed. 
Several more initialisation scripts from Linux From Scratch were 
also added. Some servers can be started with the LFS scripts, others 
with the Syllable scripts (this will be unified in later releases).


The OpenSSH server was configured and now runs by default. At the 
first system start, security keys are generated that identify the 
server.


A collection of well-known root certificates from Certification Authorities 
was added to allow OpenSSL-based programs (such as OpenSSH) to establish 
the identity of destination points for network connections.


A MIME-types database was added in /etc/mime.types that is used by 
many programs, such as web servers, to identify the MIME types of 
files based on their file name extensions.

Several REBOL software stacks were added:

- The REBOL/Services Service Oriented Architecture.

- The UniServe network server framework.
- The Cheyenne Apache-class web server.
- A CAPTCHA library.
- A MySQL network protocol.

- The QuarterMaster web programming framework, based on a Model-View-Controller 
architecture. By default, it's configured to run on Cheyenne.


- The TINY library for parsing text, abstracting data access and 
building templates of generic text formats (including HTML). This 
library is an original creation and targets both ORCA and REBOL.


Configurations, including initialisation scripts, were added for 
the OpenSSH remote access server, the CUPS print server, the BIND 
domain name server, the Apache web server, the RSync file synchronisation 
server, the SaMBa Windows-compatible file server, the INetUtils FTP 
server and the VSFTP FTP server. Several of these are not included 
in the system, but need to be installed separately (the system is 
prepared for them). The sshd, cupsd and initd servers are started 
by default.


S3Cmd/S3Sync was included, a tool for accessing the Amazon Simple 
Storage Service (S3) and synchronising files with it.


As a demo, the Genode operating system framework, its Nitpicker windowing 
server (built on SDL) and its demonstration programs were included.

#!/sbin/rebol  -qw
Rebol [
 file: %update.r

 purpose: {Update the system clock based upon the nist.gov time server}
 author: {Graham Chiu}
 date: 15-Apr-2007
]

get-nist-correction: func [/local nist-time cpu-time mjd hms] [
 nist-time: read daytime://time-a.nist.gov
 cpu-time: now

 parse/all nist-time [skip copy mjd 5 skip 2 thru " " copy hms 8 skip]
 nist-time: 17/Nov/1858 + to integer! mjd
 nist-time/time: to time! hms
 nist-correction: difference nist-time cpu-time
]

forever [
 if error? set/any 'err try [
 print [ "Current time was: " now ]
 current-time: now + get-nist-correction
 print [ "New time is: " current-time ]

 s: rejoin [ "date -s " {"} current-time/month "/" current-time/day 
 "/" current-time/year " " current-time/time {"} ]
 probe s
 call s 
 ][ probe mold disarm err ]
 wait 00:02:00 ;; wait 2 mins
]

how does syllable desktop compare as a multi-user file server?

I want to setup a file server box at home but don't want windows, 
nor mac for that.  the first sucks at file handling itself, the seconds 
well, its file explorer is just unproductive and even dangerous to 
use.

Well, Desktop has its own file server design, so you'd have to port 
the client to your Mac and Windows

Is file I/O comparable to Linux?  
Does it support windows client connections out of the box?

Thanks. The only open source package missing for my current project 
is sqlite. I downloaded the SO binary from http://sqlite.org, but 
haven't tested it yet because I still need to purchase the REBOL/SDK 
for Linux. My Windows SDK license file doesn't work. :) As you know, 
REBOL/Core doesn't support library access.

Unfortunately, Hans Reiser has gotten himself life in jail, so the 
higher level database is unlikely to ever be created. But it's still 
good as a file system

ddharing - my friend works for Pickering. Not much of a know company 
here in CZ, but rather important development/production company for 
special hw (they now e.g. got some contract by Agilent). He built 
their production facility around really old terminals (300 MHz Genode 
based Compaq T2/ a 5USD) they bought on e-bay or so. Those terminals 
have something like 24MB of RAM, so no chance of browser running 
there. They use REBOL/View system there. As there is little of RAM/storage, 
he redirected swap file to the server :-)

They run Linux of-course. Could you see Windows 95 with remote swap 
file? Maybe so, but I never tried that :-) They use them as production 
line terminals - various stages of production, recording info, storing 
into mySQL. The app was initially simple, now it is not simple anymore 
:-) I always said my friend is crazy. I suggested python, perl, etc. 
to him, to be more safe, but he did like REBOL, its size, just-on-file 
aspect, and now the system might be rolled to UK based facility :-)

How is your external file system formatted? Did you get an error 
message?

I did a "cp -v file file"

Though that message is probably reported by a file system driver, 
it could have a variant with more elavorated messages (i.e. more 
bloated driver).

Also, bug: "cd ~/ntfs_partition_mounted/<TAB><TAB>" displays Cyrillic 
letters of file names OK (as a list), but "ls <the same folder>" 
gives ????????? instead of cyrillic letters.

Also got a Permission denied (13) while attempt to copy a kernel 
log file to ext3 partttion. Under root.

One file specifies misc. connection parameters, and another file 
contains username/password pairs.

rp-pppoe.so
 is a separate file missing from ppp-beta1.zip.

That .so file.

PPP support (CONFIG_PPP), the asynchronous line discipline (CONFIG_PPP_ASYNC), 
the driver for your serial port device and/or the PPP over Ethernet 
(PPPoE) protocol driver (CONGIG_PPPOE) must be compiled into the 
kernel or loaded as kernel modules. Udev doesn't load the ppp_generic 
and pppoe modules automatically. If you compiled them as modules 
they can be loaded by the modules bootscript if they are mentioned 
in /etc/sysconfig/modules file.

is there any ram file to test with?

I'll see, if I can make a good ram-file to test with. And maybe a 
little wrapper, so it's possible to monitor, what's going on in the 
emulation.

on OSX, it would be nice to have native access to file metadata (what 
"mdls filename" return from the terminal in Tiger) with something 
like info?/all or info?/meta or info?/metadata returning an object 
with the metadata.

Is rebol3 going to support file locking? I think that is the correct 
term. I need for several users to be entering data into the same 
file at the same time. Is there a way to do this right now?

and then you can dump the resulting prn file to the printer vs creating 
a bitmap??

setup a HP printer ( eg an old laserjet ) and set the driver to print 
to a file

It supports currently print to file, print to LPT, print to Ghostscript, 
print to screen (as in screenshot), print to ethernet printer and 
to a custom network printer server made in REBOL for some simple 
printer sharing.

Yes, it saves as a bmp bitmap in the binary specified, so no need 
for intermediate file.

Do not explicitly specify paper format. 
 Unfortunately, many programs 
force you to select a paper size. Often, it can be edited out of 
the Postscript file. Instead, let the printer decide whether it can 
print a document with specific dimensions.

When I run your test with my version of postscript.r, I get a page 
with a gray box in upper left and the text "Page 1". It's an ok PS 
file here.

Ghostscript will not run that file here.

With the change, I can produce a PS file, but I still can't see the 
image. Will try some stuff...

well, it still won't run the PS file.

interesting that you can run the file. I can't.

I don't get The 'img variable is set to an image! type, just like 
it is when using load-image from a file or url (which I couldn't 
get to work either).

I managed to lock up my brothers HP Laserjet 4500 with a PDF file. 
That was interesting :-)

Does the produced PostScript file contains any bounding-box (to make 
an eps one )?

I will give it a try on my OfficeJet thing. Pretty old and I'm mostly 
sure it won't work. Any good PS file for the test?

PDF output from the PostScript dialect is ready for some test. The 
script is here:
http://www.fys.ku.dk/~niclasen/postscript/rebps2pdf.r

It works the same as the postscript.r script:
http://www.fys.ku.dk/~niclasen/postscript/postscript.r
(which has been updated, as I found some problem with comments)

Example of use:

do http://www.fys.ku.dk/~niclasen/postscript/rebps2pdf.r

write/binary %pdftest.pdf rebps2pdf load http://www.fys.ku.dk/~niclasen/postscript/pdftest.txt

Now you should have a local %pdftest.pdf file, that looks like:
http://www.fys.ku.dk/~niclasen/postscript/pdftest.pdf

but the cfg file becomes documentation... that is the real use of 
the text, and it lives directly within system, so you don't have 
to maintain different things.


hate apache as you like, anyone can configure it very quickly, since 
its all there.

and GUIs are a hell of a lot more complicated to maintain than text. 
 change one little thing in the file format and you've got to redesign 
alot of code... this doesn't happen with a file, since its being 
used directly.

Anyway, I'll try to list and add one or two comment lines for each 
available option in the next release, but I won't spend days writing 
docs for the config file.

Well, I always thought that GUI was an improvement other text files. 
Cheyenne is suppose to work out of the box with a default config 
file. The admin web UI would be reacheable with http://server-ip/admin/
(just an example).

Both approaches can live together. I want the config file to keep 
the same current format even if overwritten by the UI. Most users 
won't even care about the config file anymore once the UI will be 
available.

Right, that's something Cheyenne's config file also doesn't handle 
(yet).

Any reason why cheyenne does not allow a .r file to be read via http? 
It seemed to work with apache. I had to change it to a .txt file 
to get it to work..after batting my head for many minutes.

in the http.cfg file its assigned as a cgi script:

bind-extern CGI to [.cgi .r]

and the CGI handler will execute it.

Well, there's just a local dependency on config file to remove first 
(in my todo list) to allow remote worker process (for RSP, CGI,...). 
But you need a also a remote process manager to handle the launching 
of worker processes. Anyway, I think that using a front load balancer 
(supporting session affinity) with several servers is a simple and 
efficient solution.

Yes it has, just look in the changelog file : http://cheyenne-server.googlecode.com/svn/trunk/Cheyenne/changelog.txt

side note: if you have:
persist [sessions]

in your httpd.cfg file, stop the server and delete the %.rsp-sessions 
file before upgrading to the latest svn version

Same here, but runs ok if I encap from my personal repository, so 
it's maybe caused by an out-of-sync file in the svn repository.

Yes, that's fixed. It was working ok if custom port was specified 
from command line (-p option) but not if set in the config file.

10/7-15:13:14.250992-[RSP] ##RSP Script Error:                   
                                                                 
                    
                                            
                                                                 
                                         
        URL  = yogalinks.rsp?rest=addtocart 
                                                                 
                                         
        File = /var/www/cheyenne/yogalinks.rsp 
                                                                 
                                      
                          
                                                                 
                                                           
     
   ** Script Error : Invalid argument: o                         
                                                                 
               
        ** Where: to-integer                     
                                                                 
                                    
        ** Near:  [to integer! 
:value]                                                          
                                                      
          
                                                                 
                                                                 
          
                                                      
                                                                 
                               
Request  = make object! [        
                                                                 
                                                    
    headers: 
[Host "www.yogalinks.eu" User-Agent {Mozilla/5.0 (Macintosh; U; Intel 
Mac OS X 10_5_7; de-de) AppleWebKit/525.28.3 (KHTML, like Gecko) 
Ve
    status-line: #{                                           
                                                                 
                       
504F535420796F67616C696E6B732E7273703F726573743D616464746F636172 
                                                                 
                    
7420485454502F312E300D0A                    
                                                                 
                                         
}                      
                                                                 
                                                              
  
  method: 'POST                                                  
                                                                 
                  
    url: "yogalinks.rsp?rest=addtocart"       
                                                                 
                                       
    content: #{          
                                                                 
                                                            
70726F647563745F69643D596F67616D617425323045636F25323050726F2671 
                                                                 
                    
75616E746974793D6F26636F6C6F723D626F72646561757825324667726175 
                                                                 
                      
}                                         
                                                                 
                                           
    path: "/"        
                                                                 
                                                                
 
   target: "yogalinks.rsp"                                       
                                                                 
                   
    arg: "rest=addtocart"                    
                                                                 
                                        
    ext: '.rsp          
                                                                 
                                                             
   
 version: none                                                   
                                                                 
                 
    file: %/var/www/cheyenne/yogalinks.rsp     
                                                                 
                                      
    script-name: none     
                                                                 
                                                           
]