World: r3wp
[Core] Discuss core issues
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Pekr 7-Dec-2005 [2889x3] | I have one question regarding security - can actually rebol words be secured/protected? I noticed, when looking at get-net-info and trying to execute it, that get-reg is probably being unset internally after get-net-info gets executed. Isn't it sign rebol's security model is not sufficient? |
I am not trying to say that we need modules, but I would like to know your opinion? Can some rebol word/value be really protected? We have 'unprotect available, so actually what is 'protect good for? | |
can I e.g. create word in context, which would be visible only in terms of such context? Being it value, function, whatever, prevented to be outputted by 'get, 'probe, 'print, 'source and other functions? | |
Gabriele 7-Dec-2005 [2892] | Henrik: what happens there is that the word TIME is set to the result of the function. |
Volker 7-Dec-2005 [2893] | AFAIK not. 'protect is for debugging AFAIK. But i can work secure if you use 'secure. The way is, as long as i dont touch user-data, i am secure. Thats why rebol has get-reg on startup, no user-code loaded, no harm possible. Before i touch user-code (or data), i tighten security as much as possible. unset dangerous words (if i am paranoid i disable "make struct!". I use secure to restrict file-access only where needed, disable shell and library, maybe network-access. A script/bug can not undo this things, and IMHO that is quite secure. |
Gabriele 7-Dec-2005 [2894] | Petr: you're not talking about security, you're talking about encapsulation, i.e. making parts of your code unaccessible from other code. |
Volker 7-Dec-2005 [2895] | Henrik, copy/deep does not copy functions. and you have a function here, try mold/all instead of probe. |
Gabriele 7-Dec-2005 [2896x2] | volker: it's just that TIME is bound to the object, and he's changing its value to that date... |
so even if copy/deep copied functions, he'd still get that result above. | |
Volker 7-Dec-2005 [2898] | Got it. was to hastily. good riddle :) |
Henrik 7-Dec-2005 [2899] | volker, I don't get what serialization with mold/all does? |
Volker 7-Dec-2005 [2900] | i misunderstood, you can ignore that. mold molds functions like their sourcecode. mold/all molds functions specially, so that you see what a function and what only source is. Thought that would give a hint to the problem. |
Henrik 7-Dec-2005 [2901x2] | I don't think it's useful to solve my problem, but very interesting anyway, so I asked :-) |
I'm actually looking for a way to get input data as a block: [a: 1 b: 2 c: 3] made into an object which is: make object! [a: b: none c: does [something to make the c value]] so I would get an object like this: make object! [a: 1 b: 2 c: <return value from object function>] | |
Pekr 7-Dec-2005 [2903] | Gabriele - encapsulation is kind of security. And in fact, if some code is encapsulated, or not being able to be called from outside of some context, it is kind of secure |
Gabriele 8-Dec-2005 [2904] | yes, but that is another level of security, where you trust some modules of a script but not others. i guess that will come with REBOL 3 |
Pekr 8-Dec-2005 [2905] | Interesting question on ml: join 'a 'b == "ab" type? join 'a 'b == string! Is that correct? Should not be a word instead? |
Chris 8-Dec-2005 [2906x3] | My guess is that as word! values are not series! then join doesn't produce them... |
In the same way that, eg. >> join 1 2 == "12" | |
>> join true false == "truefalse" | |
Gordon 8-Dec-2005 [2909x2] | How do you include a space in a directory name for Request-file/file? |
Nevermind. It turns out that if you use FireName: to-file request-file/file "/C/Program Files/" that it will split the path and name at the space. OTOH if you use Filename: to-file request-file/file "/C/Program Files/*" (note character after the path) that this will work. The character after the path can be any character. | |
Louis 8-Dec-2005 [2911] | What is the correct code for ftp to a site when the user id is [john-:-smith]? |
Sunanda 8-Dec-2005 [2912] | Something like: read [scheme: 'ftp user: "[john-:-smith]" pass: "****" host: "_____"] |
Louis 8-Dec-2005 [2913] | Many thanks, Sunanda. My debt to you keeps piling up! |
Davide 9-Dec-2005 [2914x2] | Hi all, I'm trying to read from a newsserver, what's wrong ? >> p: open/lines tcp://news.aioe.org:119 >> first p == {200 aioe.org InterNetNews NNRP server INN 2.4.3 (20050923 snapshot) ready (posting ok).} >> insert p "LIST" >> first p ** Script Error: Out of range or past end ** Near: first p |
Every command that I send seems produce nothing: >> insert p "GROUP net.unix-wizards" >> print copy p none | |
Graham 9-Dec-2005 [2916] | try the nntp scheme. |
Davide 9-Dec-2005 [2917] | I'm already using nntp scheme, but it become slow because it reads first all message id from the group in port/locals/message-block In large groups accessing the msgs list is very slow as you can see here: http://www.ddmind.com/modules.php?name=gdp_rforum&ng=it.sport.calcio.milan (works only in IE :-)) |
Izkata 9-Dec-2005 [2918] | >> p: open/lines tcp://news.aioe.org:119 >> first p == {200 aioe.org InterNetNews NNRP server INN 2.4.3 (20050923 snapshot) ready (posting ok).} >> insert p "LIST^/" ;;note the newline >> first p == {215 Newsgroups in form "group high low flags".} Don't ask me why - I don't think it should need it, either... |
Graham 9-Dec-2005 [2919] | because you've used open/lines ... |
Davide 9-Dec-2005 [2920x2] | Here, using newline does not work, it works only using no-wait refinement: REBOL [] p: open/lines/no-wait tcp://news.aioe.org:119 wait p print copy p insert p "GROUP it.test" wait p print copy p |
I remember that insert func is syncronous when used in a port opened without no-wait refinement. Time to read again the core manual :-) . Thanks anyway | |
Graham 11-Dec-2005 [2922] | Has anyone done anything in the way of a reporting dialect ( that gets converted to sql and executed ) ? |
Graham 12-Dec-2005 [2923] | I'm thinking of allowing the program to execute rebol sql dialect as is .. except I would prevent actions such as alter, drop, delete, insert .. ie. only allow selects. Any danger in that? I don't think it contravenes the license ... |
Rebolek 12-Dec-2005 [2924] | Because I'm writing scripts on more than one computer I need to sync files somehow. I can use flashdisk for synchronization, but USB is not always available or I forget my flashdisk at home, so it's not always the right option. Or I can use ftp to upload and download files. But at the end I've got lots of different directories with different versions, because I have no intelligent file structure. I was inspired by Google filesystems for win and lin so I decided to use some freemail (gmail preferably) for my scripts maintaing. Unfortunatly, Gmail needs some authentication, SSL or what and SSL under Rebol needs Command and Command needs 350$ to buy. So I found another freemail provider that offers both non-authenticated SMPT and POP and therefore is OK for REBOL (btw. remeber the old REBOL example? send [luke-:-rebol-:-com] read http://www.rebol.com? Hard to do with all the authetications required today.) and I started coding. The result is a small application called %rspace.r that can upload file to repository, download newest version from repository, or you can get list of all files in repository and finally, if you're happy with your script, you can publish it on www/ftp. All this with documentation in less than 6kB. All you need is REBOL and mail account cappable of SMTP/POP without authentication. It's good to have an FTP account for publishing files but that's not required. If you do not have an mail account, I've set up one on seznam.cz, user 'rebolspace' and pass 'spacerebol' for testing this application (it's built in, so you can start testing right after download). Remember, it's just alpha, does not have many features, but it works, I can write something here, update it there and have all the versions accesible from everywhere. It's written for REBOL scripts so with big projects it's going to be very slow and unusable, but for small project (and most REBOL scripts are really small) it's probably good. So download it form http://krutek.info/rebol/rspace.r(stable) or http://rebolspace.sweb.cz/rspace.r(latest published version). WARNING: because [rebolspace-:-seznam-:-cz] is open account it won't be wise to use it ordinarily. Please, if you like it, set up your own account and use it instead of built-in one. And remember: all suggestions and fixes are welcome. |
MichaelB 12-Dec-2005 [2925] | find-deep: func [b [block!] o [any-type!]][ forall b [ either block? b/1 [return find-deep b/1 o][if b/1 = o [return b]] ] none ] z: find-deep [a b [c d [e] f]] 'e probe z Has somebody an idea why this is not working ? Find-deep is always return none, even though it finds the e in the inner block. Upon debugging the 'e is found and the inner block returned, but then one level up in the recursion only a none reaches the 'return after the find-deep invocation. Maybe I'm missing something very simple ? |
Volker 12-Dec-2005 [2926] | Could forall have a bug with return? IIRC some versions had one. then the 'forall traps the return. |
MichaelB 12-Dec-2005 [2927] | this might be, as I really was trying to find a mistake, but it didn't make sense |
Volker 12-Dec-2005 [2928] | 1.3.2.4.2 returns "[e]" |
MichaelB 12-Dec-2005 [2929x2] | ok thanks, I gonna try it |
1.3.61.3.1 didn't work, but the new official releases did | |
Volker 12-Dec-2005 [2931] | in such cases, try to print something between the forall and the none. I uess you will see that output multiple times. |
MichaelB 12-Dec-2005 [2932] | 2.6.50.3.1 also didn't work .... I have to be more careful with the different versions I guess |
Volker 12-Dec-2005 [2933x2] | forall: func [ "Evaluates a block for every value in a series." [catch throw] 'word [word!] {Word set to each position in series and changed as a result} body [block!] "Block to evaluate each time" ][ throw-on-error [forskip :word 1 body] ] |
http://www.rebol.net/cgi-bin/rambo.r?sort=1&limit=1&cmd=Search&id=&pattern=forall | |
MichaelB 12-Dec-2005 [2935] | you're right the versions differ pretty much when doing a 'source on 'forall |
Henrik 12-Dec-2005 [2936] | 1.3.61 and 2.6.50 is somewhat older than 1.3.2. I think there are quite a lot of bugfixes in 1.3.2... |
MichaelB 12-Dec-2005 [2937] | Yes, I'm right now just a little bit confused with the numbers anyway. I have to sets of icons, alphas and official and used the alphas for testing funcs and the like and thought they're at least as new/fixed as the official releases, but maybe my alpha isn't completely up-to-date either. |
DideC 12-Dec-2005 [2938] | See http://www.rebol.net/cgi-bin/rambo.r?id=3925& |
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