March 2005 - tbnl-devel@common-lisp.net - mailman3.common-lisp.net

[tbnl-devel] arbitrary per-request data?
by Zach Beane 17 Sep '05

17 Sep '05

I have an application that has a notion of a current user that is lazily established on a per-request basis. For now, I have been returning a handler that is really a lambda wrapping a real handler that lexically binds the special *current-user*: (defun page-handler (request) (multiple-value-bind (handler foundp) (gethash (script-name request) *handlers*) (when foundp (lambda () (let ((*current-user* *current-user-local-unbound-value*)) (funcall handler)))))) But it occurred to me that there is already the *request* structure. Would it make sense to be able to have a table of arbitrary keys and values in the request structure for application use? I was thinking of an accessor like this: request-data key &optional (request *request*) => value, foundp Then I could write CURRENT-USER something like: (defun current-user () (multiple-value-bind (value foundp) (request-data 'user) (if foundp value (setf (request-data 'user) (cookie-user))))) Right now it's a bit messier than that. What do you think? If this seems reasonable I can work out and submit a patch. Zach

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[tbnl-devel] New version 0.5.0 / Multiple back-ends
by Edi Weitz 17 Aug '05

17 Aug '05

Hi! I've finally found some time to incorporate Bob's changes, test them and document them. I've also changed the logging API and re-factored some of the code. I'm sure I broke something in the process so please test... :) Specifically, I tried to explain in the documentation how TBNL talks with the different back-ends. I also changed the test setup so that it now hopefully adapts to all three back-ends and gives new users a chance to understand how TBNL works. While testing the "stand-alone" version I had some problems with MS Internet Explorer but I /think/ I've nailed them down now. Note that some of the changes in 0.5.0 might break API compatibility with earlier versions so be careful if you use this release for an existing deployment of TBNL and resort to the docs if in doubt. Special thanks to Bob Hutchison who made this all possible! Download: <http://weitz.de/files/tbnl.tar.gz>. Have fun, Edi.

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[tbnl-devel] basic package question
by Jason Wang 02 Apr '05

02 Apr '05

hi, i have read through the documentation for both TBNL and CL-WHO, i have created a page based on what i read.. but i found out i can't figure out how to test the page.. i can see the test page by doing (asdf:oos 'asdf:load-op :tbnl-test), how do i change package from :tbnl-test to something else? what code do i need to add? i have tried just adding a folder and declare (in-package #:tbnl-test2), that didn't work out too well.. what do i need to do in order to start test2? thanks alot :D ps. if this is on the documentation, please excuse my ignorance.. i indeed have read all of it and didn't find any answers to it.. -- www.programer.name - my own personal blog : )

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[tbnl-devel] New version 0.5.2
by Edi Weitz 26 Mar '05

26 Mar '05

ChangeLog: Version 0.5.2 2005-03-26 Fixed bug in modlisp.html where *CLOSE-TBNL-STREAM* could be NIL although it should be T Set correct content type for 304 replies Download: <http://weitz.de/files/tbnl.tar.gz> Happy Easter, Edi.

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[tbnl-devel] problem with the example
by Sergio Garcia 19 Mar '05

19 Mar '05

Hello; I have just installed TBNL on debian sarge, using SBCL 0.8.19.39. The Kevin Rosemberg packages were installed using apt-get, and TBNL and other dependencies were installed using asdf-install The example seems to work fine, except for the "session" page. The page is displayed fine initially, but when I try to submit a change it displays the "An error has occured" message. (The upload files example works fine). This error occurs using both mod_lisp and 'stand-alone' tbnl. When using mod_lisp, thefollwing messaged is logged in the apache error log: [Fri Mar 18 20:28:55 2005] [error] (20014)Error string not specified yet: [TBNL] The assertion (NOT [Fri Mar 18 20:28:55 2005] [error] (20014)Error string not specified yet: [TBNL] (EQL SB-THREAD::NEW-VALUE [Fri Mar 18 20:28:55 2005] [error] (20014)Error string not specified yet: [TBNL] (SB-THREAD:MUTEX-VALUE SB-THREAD::LOCK))) failed. Any hint about why this error appears? Is there anything I can do to get a more detailed description of the error in the lisp repl or in the browser? Thanks, Sergio

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[tbnl-devel] installing mod_lisp2 + tbnl on mepis(debian)
by Jason Wang 19 Mar '05

19 Mar '05

hi (Again), i have just installed CMUCL + Slime on mepis (heavily based on debian).. i just found out that i have no idea how to install mod_lisp2, i know i have apache2 working, since if i go to http://localhost/, the default page will show up.. but i can't seem to find the httpd.conf anywhere, only the apache 1.3 httpd.conf can be found. I only found httpd.conf in /etc/apache2/ that says the following: # This is here for backwards compatability reasons and to support # installing 3rd party modules directly via apxs2, rather than # through the /etc/apache2/mods-{available,enabled} mechanism. # #LoadModule mod_placeholder /usr/lib/apache2/modules/mod_placeholder.so prob the right place is in the new apache2.conf?? though i can't find a place to add modules as directed on the offical install guide.. then there is apxs -i -c mod_lisp-2.35.c not working.. it says bash cannot find the command.. i have no idea what's wrong :| oh yah, one more thing, where do you put the website files? i can't find htdocs folder.. thanks alot for all your help :D Jason -- www.programer.name - my own personal blog : )

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[tbnl-devel] Session cookie should be set for path=/
by Stefan Scholl 17 Mar '05

17 Mar '05

Hi! I was hunting a bug. The session cookie was missing on all pages other than the originating page. Then I've looked for the internal representation of the Cookie. My Firefox has stored it with a path value equal to the originating page. I've checke some websites which use session cookies, too. One PHP site has a "path=/" in the Set-Cookie line of the response header. RFC 2109 says about Set-Cookie: Path Defaults to the path of the request URL that generated the Set-Cookie response, up to, but not including, the right-most /. So that's the correct behavior of my browser. For sessions the path should be set to "/" by the server. In session.lisp, function start-session (set-cookie *session-cookie-name* :value (session-cookie-value session)) changed to (set-cookie *session-cookie-name* :value (session-cookie-value session) :path "/") Regards, Stefan

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[tbnl-devel] New version 0.5.1
by Edi Weitz 17 Mar '05

17 Mar '05

ChangeLog: Version 0.5.1 2005-03-17 Changed default cookie path in START-SESSION (suggested by Stefan Scholl) Small bugfixes More headers from the Araneida front-end Added *SHOW-ACCESS-LOG-MESSAGES* Changed "back-end" to "front-end" :) Download: <http://weitz.de/files/tbnl.tar.gz> Cheers, Edi.

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[tbnl-devel] Another patch to add a non-araneida HTTP header parser
by Bob Hutchison 16 Mar '05

16 Mar '05

Hi, Here is a patch that will modify TBNL so that it no longer needs Araneida to work stand-alone. It is pretty simple. You'll be wanting to look at read-http-request and read-http-headers in modlisp.lisp Cheers, Bob ---- Bob Hutchison -- blogs at <http://www.recursive.ca/hutch/> Recursive Design Inc. -- <http://www.recursive.ca/>

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[tbnl-devel] Patches and example for running TBNL and Araneida together
by Bob Hutchison 16 Mar '05

16 Mar '05

Hi, I've attached patches for both Araneida and TBNL to this message. Sorry for the cross-posting but there is some co-ordination required here and I thought this would be a good way to do it. I've included this message the text from a README file that is part of the tgz file I've attached. Unfortunately there is a really *nasty* bug with the browser->tbnl connection -- it consumes about 250k of memory for every access. I cannot see the problem, and I'm looking for help :-) It appears to be completely stable for browser->araneida->tbnl (tested for 100's of thousands of hits). I don't know how the tbnl-araneida package with the example should be distributed. I'm sure this description is too brief, I'll answer what questions I can. I hope you find this useful. Cheers, Bob -------- Some changes have been made to allow TBNL to be used with Araneida. In particular, it is now possible to use Araneida as a server to TBNL handlers and it is possible to send HTTP requests directly to the TBNL socket (in effect by-passing Araneida). This means that the following connections are possible *simultaneously* browser->apache->araneida browser->apache->araneida->tbnl (NEW) browser->apache->mod_lisp->tbnl browser->araneida browser->araneida->tbnl (NEW) browser->tbnl (NEW) There is a package, tbnl-araneida, that shows how this works. In Summary... To connect directly to TBNL, all that is required is that araneida is compiled and loaded *before* tbnl is compiled and loaded. (There is conditionally compiled code in TBNL). To connect to TBNL through Araneida, use the the Araneida handler -- tbnl-araneida-handler -- provided for this purpose. Note that in both cases the TBNL *dispatch-table* must be set up as you normally would when using TBNL. The sense of the installed Araneida handler changes slightly to a url prefix mapper to TBNL (which further refines the request using the *dispatch-table*). -------- ---- Bob Hutchison -- blogs at <http://www.recursive.ca/hutch/> Recursive Design Inc. -- <http://www.recursive.ca/>

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[tbnl-devel] Problem with file uploads
by ocorrain＠yahoo.com 15 Mar '05

15 Mar '05

Hi-- I'm using tbnl to run a site (educational in purpose), which will be rich in texts and images. I want people with the appropriate privileges to be able to upload images to the server, where various incantations will be performed to ensure that the images are formatted correctly for the site. However, I seem to be running into a problem with either mod lisp or tbnl, for images >=~1MB. When I try to upload an image of this site, an internal server error is returned after a few seconds, and the converted image (using imagemagick) appears in the thumbnail gallery with a portion of the bottom shown in grey, as if the image did not upload completely to the server. Is there some configurable upper limit to the size of file uploads, or can someone point me to the likely source of the problem? regards -- Tiarnán

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[tbnl-devel] Running TBNL Standalone
by Bob Hutchison 14 Mar '05

14 Mar '05

Hi, Has anybody thought of how TBNL might be run without an apache server or mod_lisp involved? Why? I've got an application that would normally be run on a server, but it would be useful to have a standalone demo version. Setting up apache is not the kind of skill I'd expect from the end user of this particular application. It seems to me that somehow getting Araneida talking to TBNL would be one route -- fake mod_lisp in an Araneida handler or replace TBNL's modlisp.lisp would be two possibilities. I suppose aserve and cl-http are also possibilities, but I suspect that Araneida has something more to gain from TBNL. Cheers, Bob ---- Bob Hutchison -- blogs at <http://www.recursive.ca/hutch/> Recursive Design Inc. -- <http://www.recursive.ca/>

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[tbnl-devel] mod_negotiation and wrong Last-Modified
by Stefan Scholl 12 Mar '05

12 Mar '05

[That's what I've sent to gmane.comp.apache.user today.] Hi! I use Apache 1.3.33 (Gentoo) under Linux 2.6 together with mod_lisp 2.42. mod_lisp is a simple handler which communicates with running Lisp images. This is what I've found today: When setting "Last-Modified" (the handler correctly calls ap_parseHTTPdate(), ap_update_mtime(), and ap_set_last_modified()) the resulting response header has an other date in the "Last-Modified" field. It is the mtime of the DocumentRoot. But only if the mtime of DocumentRoot is _newer_ than the date you want to set. There's no "Last-Modified" in the response header when you don't set it yourself. ap_update_mtime() only updates r->mtime when the supplied time is _newer_. So I've guessed that some other handler sets r->mtime to the DocumentRoot. I've found mod_negotiation. After removing it from the server config the response header had the correct "Last-Modified" date. 2 possible workarounds: 1.) touch the DocumentRoot to an older date 2.) remove mod_negotiation Regards, Stefan -- Web: http://www.no-spoon.de/ -*- IRC: stesch @ freenode

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Re: [tbnl-devel] a problem while installing..
by Jason Wang 06 Mar '05

06 Mar '05

hi, i'm back again... aftering trying to get Fedora Core 3 to work for about a week, tired of trying for now, i'll get back at it when i learn more lisp :D.. so now i have taken ur earlier advice in downloading trial version of Allegro CL, do you know how i can integrate into my lisp in a box? since you have said it's possible, is it possible in the trial version? thanks alot! -- www.programer.name - my own personal blog : )

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Re: [tbnl-devel] a problem while installing..
by Edi Weitz 06 Mar '05

06 Mar '05

On Sat, 5 Mar 2005 20:49:12 -0500, Jason Wang <randomtalk(a)gmail.com> wrote: > ahhh.. that is indeed wat's wrong.. so can you tell me what is going > on? It's all in the docs. > why do i need to load :tbnl-test? You only need to load it if you want to see the test website. > since from my php experience whatever page you point to the server > suppose to serve up? mmm. Luckily this is not PHP but Lisp. (And, FWIW, you can also tweak PHP not to do that.) Edi.

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[tbnl-devel] Accessing match information for regex dispatchers?
by Stefan Scholl 02 Mar '05

02 Mar '05

Hi! Would it be bad style or a bad idea to extend CREATE-REGEX-DISPATCHER (html.lisp) to hold the result of CL-PPCRE:SCAN in variables you then DECLARE as SPECIAL so that the called handler function can access the match information? Something like *MATCH-START*, *MATCH-END*, *REG-STARTS*, and *REG-ENDS* just visible for the handler. Regards, Stefan

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[tbnl-devel] New version 0.3.12
by Edi Weitz 01 Mar '05

01 Mar '05

Changelog: Version 0.3.12 2005-03-01 Added *HTTP-ERROR-HANDLER* (suggested and coded by Stefan Scholl) Exported and documented *SESSION-MAX-TIME* Download: <http://weitz.de/files/tbnl.tar.gz> Cheers, Edi.

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[tbnl-devel] Handling HTTP errors
by Stefan Scholl 01 Mar '05

01 Mar '05

Hi! Function send-output in modlisp.lisp handles the response for different return codes. E. g. there's a "The requested URL ~A was not found on this server." for the 404 (+http-not-found+). How about letting the user change this behavior? One could explain the error to the user. Maybe in another language. Or think of all the funny 404 games. Remember the SGI babies? There could be different approaches: * Simple hash A hash with error code as key and handler as value. + Easy to implement + Can handle all errors (thrown by handlers _and_ when no dispatcher is found) - Not very flexible. Just checks for the code and not for any request data. * Error dispatcher Like the normal dispatcher, but checking for the right error output handler. + Can handle all errors (thrown by handlers _and_ when no dispatcher is found) + Flexible. Can check the code _and_ request data. - A bit big. The same effort like handling normal requests. * Handler outputs itself and signals that A handler wants to return a 404. It constructs the output string and signals the fact that there's no need for TBNL to build the HTML for the output. + Easy to implement(? clean?) + Flexible - Can't handle all errors. (No handler found? Then the code won't be executed.) Regards, Stefan

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