Pd-dev July 2006

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21 participants
45 discussions

Re: PD-cvs Digest, Vol 17, Issue 13
by Mathieu Bouchard 21 Jul '06

21 Jul '06

On Fri, 21 Jul 2006, Hans Christoph-Steiner wrote to pd-cvs: > Modified Files: > Makefile > Log Message: > removed pdp and pidip on Linux because they weren't compiling > ! LIB_TARGETS += pdp pidip > ! LIB_TARGETS += added pdp and pidip on Linux because they are compiling _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada

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HTTP requests external : cURL threads ?
by Alexandre Quessy 20 Jul '06

20 Jul '06

Hi, I am working on a simple external to do HTTP requests from PD. The idea is to implement a simple way to send and receive simple data to a web server. This is intended to work together with a set of classes that will interpret the GET variables as key and values pairs where the values can be similar to FUDI protocol messages. The web page would then answer with a FUDI message or so. I don't use Python because I want it to be very fast, totally portable and easy to install. (I also agree with Hans regarding small tools to make a constellation of low level objects) Here are my bugs : perhaps I am not very good yet with strings in C, but I have several errors when I try to execute this code from within PD as an external. Well, when I get malloc errors, it must be only about memory size arithmetics, but when it gets into segmentation faults, I was just wondering if it could be because cURL starts a new thread. I think that thread are not much appropriate in PD's context. Do you think this is the problem, or I am just still a bit bad with memory maths ? Also, if you have ideas about this external, please don't hesitate. I think I will rename it to http, as it is not intended in downloading whole files, but just for simple HTTP requests. See below for the current code, the makefile and one of the errors it creates. Alexandre Quessy http://alexandre.quessy.net ============================= error when using it ==================== pd wget-help.pd STACK_END old=0xbf9e5ffc; new=0xbf9efffc PDP: pure data packet PDP: version 0.12.4 * About to connect() to alexandre.quessy.net port 80 * Trying 64.15.134.165... * connected * Connected to alexandre.quessy.net (64.15.134.165) port 80 > GET /pd/curlme.php?asd=qwe+123 HTTP/1.1 User-Agent: Pure Data Host: alexandre.quessy.net Accept: */* < HTTP/1.1 200 OK < Date: Mon, 19 Jun 2006 16:03:44 GMT < Server: Apache < X-Powered-By: PHP/4.3.10-16 < Connection: close < Transfer-Encoding: chunked < Content-Type: text/html * Closing connection #0 socket receive error: Connection reset by peer (104) Erreur de segmentation ================== makefile ==================================== all: wget.pd_linux @echo "making wget" wget.pd_linux: wget.c gcc -DPD -O2 -funroll-loops -fomit-frame-pointer \ -Wall -W -Wshadow -Wstrict-prototypes \ -Wno-unused -Wno-parentheses -Wno-switch -o wget.o -c wget.c ld -export_dynamic -shared -o wget.pd_linux wget.o -lcurl -lc -lm strip --strip-unneeded wget.pd_linux rm wget.o ================== code : wget.c ================================ /** * [wget] is a Pure Data object for simple HTTP requests. * * @url http://alexandre.quessy.net/ * @author Alexandre Quessy <alexandre(a)quessy.net> * @license GNU General Public License 2006 */ #define PDWGET_VERSION "0.1.0" /* PD includes */ #include "m_pd.h" /* cURL and standard C libraries */ #include <curl/curl.h> #include <string.h> #include <stdlib.h> /* Download callback function prototype */ size_t wget_callBack(void *ptr, size_t size, size_t nmemb, void *x); /** * variables of the pd object */ typedef struct wget { t_object x_ob; /* The instance. Contains inlets and outlets */ t_outlet *x_outlet0; /* result string */ t_outlet *x_outlet1; /* HTTP error codes */ } t_wget; /** * HTTP request. */ void wget_request(t_wget *x, t_symbol *s, int argc, t_atom *argv) { post("wget : called request."); //curl_global_init(CURL_GLOBAL_NOTHING);//CURL_GLOBAL_ALL //t_symbol *sym_tmp = atom_getsymbol(&argv[0]); if (argc < 1) { post("wget : Error : needs arguments."); } else { t_symbol *sym_tmp = atom_getsymbolarg(0, argc, argv); char *url = sym_tmp->s_name; post("wget : requesting : %s", url); /* cURL context */ CURL *pContext = curl_easy_init(); if (pContext == NULL) { post("wget : Error : Null cURL handle."); } else { /* cURL options */ CURLcode pCode = curl_easy_setopt(pContext, CURLOPT_URL, url); curl_easy_setopt(pContext, CURLOPT_WRITEFUNCTION, wget_callBack, (void *) x); curl_easy_setopt(pContext, CURLOPT_VERBOSE, 1); curl_easy_setopt(pContext, CURLOPT_HEADER, 0); curl_easy_setopt(pContext, CURLOPT_NOPROGRESS, 1); curl_easy_setopt(pContext, CURLOPT_USERAGENT, "Pure Data"); curl_easy_setopt(pContext, CURLOPT_NOSIGNAL, 1); curl_easy_setopt(pContext, CURLOPT_TIMEOUT, (long) 5); /* cURL performing */ post("wget : Performing the request."); const CURLcode result = curl_easy_perform(pContext); if(CURLE_OK != result) { post("wget : Error from cURL: %s", curl_easy_strerror(result)); } else { /* HTTP code */ long lHttpCode; curl_easy_getinfo(pContext, CURLINFO_RESPONSE_CODE, &lHttpCode); post("wget : HTTP response code: %ld ", lHttpCode); //outlet_float(x->x_outlet1, (float) lHttpCode); } } post("[wget] cleaning up..."); /* cURL cleanup */ curl_easy_cleanup(pContext); post("[wget] Local cleaned up."); //curl_global_cleanup(); post("[wget] Global cleaned up."); //outlet_list(x->x_outlet0, gensym("A_FLOAT"), numCols+1, &atoms); // &atoms ?? } // else } /** * The representation of the class in PD. */ t_class *wget_class; /** * constructor */ void *wget_new(t_symbol *selector, int argc, t_atom *argv) { post("wget : creating a new object."); t_wget *x = (t_wget *) pd_new(wget_class); x->x_outlet0 = outlet_new(&x->x_ob, gensym("list")); x->x_outlet1 = outlet_new(&x->x_ob, gensym("float")); return (void *)x; } /** * setup */ void wget_setup(void) { curl_global_init(CURL_GLOBAL_NOTHING); wget_class = class_new(gensym("wget"), (t_newmethod) wget_new, 0, sizeof(t_wget), 0, A_GIMME, 0); class_addmethod(wget_class, (t_method)wget_request, gensym("request"), A_GIMME, 0); post("----------------------------------------------------"); post(" [wget] %s (c) GPL Copyleft 2006 Alexandre Quessy", PDWGET_VERSION); post(" Simple HTTP requests for Pure Data."); post("----------------------------------------------------"); } /** * Callback implementation */ size_t wget_callBack(void *ptr, size_t size, size_t nmemb, void *x) { size_t totalSize = nmemb * size; char *dest = malloc(totalSize + 1); //(sizeof(char)) strcpy(dest, (char *) ptr); post("[wget] : Getting data."); dest[totalSize] = '\0'; post("result :"); post("==============================="); post("%s", dest); post("==============================="); //outlet_symbol(((t_wget *)x)->x_outlet0, gensym(dest)); //free(dest); return(totalSize); }

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[ pure-data-Bugs-1525832 ] Pd crash when no coords are given in msg from parent to abs
by SourceForge.net 20 Jul '06

20 Jul '06

Bugs item #1525832, was opened at 2006-07-20 11:56 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525832&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: puredata Group: None Status: Open Resolution: None Priority: 5 Submitted By: Jamie Bullock (postlude) Assigned to: Nobody/Anonymous (nobody) Summary: Pd crash when no coords are given in msg from parent to abs Initial Comment: Pd version 0.40-0test01 If a message is sent to an abstraction from its parent, and no co-ordinates are given e.g.: [pd-myabs.pd msg foo( or [pd-myabs.pd obj( Pd crashes with a segfault. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525832&group_…

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[ pure-data-Bugs-1525788 ] [namecanvas $1] crashes Pd when addressed by parent
by SourceForge.net 20 Jul '06

20 Jul '06

Bugs item #1525788, was opened at 2006-07-20 09:24 Message generated for change (Settings changed) made by postlude You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525788&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: puredata Group: v0.40.0 >Status: Deleted Resolution: None Priority: 5 Submitted By: Jamie Bullock (postlude) Assigned to: Nobody/Anonymous (nobody) Summary: [namecanvas $1] crashes Pd when addressed by parent Initial Comment: If an abstraction containing [namecanvas $1] is instantiated with a first argument e.g. foo, and the message [;foo msg bar( is sent from the parent, Pd crashes. Side note: I understood [namecanvas] to be depracated, but there seems to be some desire amongst users and devs for this not to be the case. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525788&group_…

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[ pure-data-Bugs-1525788 ] [namecanvas $1] crashes Pd when addressed by parent
by SourceForge.net 20 Jul '06

20 Jul '06

Bugs item #1525788, was opened at 2006-07-20 09:24 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525788&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: puredata Group: v0.40.0 Status: Open Resolution: None Priority: 5 Submitted By: Jamie Bullock (postlude) Assigned to: Nobody/Anonymous (nobody) Summary: [namecanvas $1] crashes Pd when addressed by parent Initial Comment: If an abstraction containing [namecanvas $1] is instantiated with a first argument e.g. foo, and the message [;foo msg bar( is sent from the parent, Pd crashes. Side note: I understood [namecanvas] to be depracated, but there seems to be some desire amongst users and devs for this not to be the case. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1525788&group_…

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CVS mirror
by Hans-Christoph Steiner 20 Jul '06

20 Jul '06

Just an FYI: I have started an rsync mirror of the SourceForge CVS repository. This will serve both as a backup and as a quick source for the Pd compile farm. .hc ------------------------------------------------------------------------ Man has survived hitherto because he was too ignorant to know how to realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams

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[ pure-data-Feature Requests-1525163 ] Make each canvas uniquely adressable
by SourceForge.net 19 Jul '06

19 Jul '06

Feature Requests item #1525163, was opened at 2006-07-19 10:24 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478073&aid=1525163&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: puredata Group: None Status: Open Priority: 5 Submitted By: Jamie Bullock (postlude) Assigned to: Nobody/Anonymous (nobody) Summary: Make each canvas uniquely adressable Initial Comment: For the purposes of dynamic patching, it would be very useful if all canvases were uniquely addressable. For example: [;pd-my_abstraction.pd foo bar( Should retain its current behaviour and go to all instances of that abstraction whereas [;pd-$0 foo bar( Should go to its container canvas. And the expanded $0 variable should work from other canvases. E.g. if $0 above expands to 1001, then [;pd-1001 foo bar( should have the same effect as the above, but work from any open canvas. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=478073&aid=1525163&group_…

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developer cvs update - access denied
by Thomas Grill 19 Jul '06

19 Jul '06

Hi all, does someone know why i can't cvs update (via ssh) any more? It keeps saying "access denied" which looks as if my access rights have changed. greetings, Thomas -- Thomas Grill http://grrrr.org

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which RedHat for the Pd compile farm?
by Hans-Christoph Steiner 17 Jul '06

17 Jul '06

I have the Pd compile farm machines lined up and ready to go. I just need to know which version of RedHat I should install. I am Debian user and I don't keep up with RedHat, so I don't really know. .hc ------------------------------------------------------------------------ There is no way to peace, peace is the way. -A.J. Muste

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Debugging pd objects
by David Plans Casal 17 Jul '06

17 Jul '06

Hello all, Davide Morelli and myself are working on a Flext object for the Frank framework in externals. Right now, we're getting strange segmentation faults in Linux and just plain crashes in OSX. GDB reports nothing useful. GDB with GuardMalloc in OSX appears to be way to high on its use of virtual memory to actually run. Any thoughts/ideas/best practices out there on debugging tools? (I realise we should be using Valgrind for LInux, but it isn't there as a port for OSX). In particular, we would love to hear from people who are debugging memory allocation problems with pd objects (what are you using?), people who are having glibc problems, and developers using Flext on debugging tools in general. Cheers, David

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Pd-dev July 2006