September 2017 - Pharo-users

Re: [Pharo-users] Writing XML

by Jimmie Houchin

I still do not know how to do this correctly. But I have something that seems to work for the moment. Using #asUTF8Bytes f nextPutAll: (writer write contents asUTF8Bytes). Now the file is in UTF-8 and normal size. Jimmie On 09/13/2017 12:02 PM, Jimmie Houchin wrote: > Hello, > > I am attempting to read and write an XML document. > > Currently I have parsed the document successfully. I have basic > navigation and have learned how to modify the XMLDocument. > > Now I want to write the modified document back to the file system. > What I have tried so far is: > > writer := XMLWriter new. > xmldoc document writeXMLOn: writer. > writer stream. > f := File openForWriteFileNamed: '/home/jimmie/xmldoc.xml'. > f nextPutAll: (writer write contents). > f flush. > f close. > > It does write an xml document to the file system. However, it has > exploded in size. The original is 28mb and is in UTF-8. The newly > written file is 112mb and is UTF-32. > > I do not know why the change in encoding or how to correct or manually > set the encoding. > > Any help in understanding how to correctly write an XML document that I > have read and minimally modified would be greatly appreciated. > > Thanks. > > Jimmie > >

Sept. 13, 2017

Re: [Pharo-users] How to convert avoiding parser

by Esteban A. Maringolo

Hi, Side note: Please sanitize the strings you use for the concatenation or use prepared statements, otherwise you could be vulnerable to SQL INJECTION attacks. Best regards, Esteban A. Maringolo 2017-09-13 17:34 GMT-03:00 Sven Van Caekenberghe <sven(a)stfx.eu>: > >> On 13 Sep 2017, at 19:44, Casimiro de Almeida Barreto <casimiro.barreto(a)gmail.com> wrote: >> >> Hello, >> >> Perhaps someone can help me with this problem: I'm saving a key pair in a mariadb/mysql table as follows: >> >> str := 'INSERT INTO chaves_de_encriptacao (numero_funcional, chave_privada, chave_publica) '. >> str := str,'VALUES ('''. >> str := str, self personId leaId asString, ''', '''. >> str := str, self keyPair privateKey asAsn1DerBytes asByteArray hex, ''', '''. >> str := str, self keyPair publicKey asAsn1DerBytes asByteArray hex,''')'. >> >> [ dbConnection execute: str ] on: Exception do: [ ^ false ]. >> >> And I'd like to recover the keys (SELECT * FROM chaves_de_encriptacao WHERE numero_funcional = 1010) and then reconvert in order to recover the original keys. Obviously I can do that by writting a parser that will get the hex and bring it back to binary but I'd like to avoid it. >> >> Question is: is there a reverse for asByteArray hex? > > Yes: > > ByteArray readHexFrom: #[ 0 1 2 3 4 5 6 7 8 9 10 ] hex. > > HTH, > > Sven > > >

Sept. 13, 2017

execute a code block at a given time in pharo ?

by Daniel BLANC

Hi All, I'm a very beginner with smalltalk. I am building a small seaside app for controlling wifi access of my teenagers kids. In this app I need to start or stop the wifi acces at a given time. For the moment I'm doing it with an infinite loop in a process, with this code: WifiController >> startScheduler ^ SchedulerProcess ifNil: [ SchedulerProcess := [ [ true ] whileTrue: [ self schedulerApplyAutoStartStopRules. 56 seconds wait ] ] forkNamed: 'DanWifiManagerScheduler' ] I'm wondering if there is a way to do this without this infinite loop ? May be there is a class in the standard pharo image that can execute a code block at a given time ? Thanks, Daniel

Sept. 13, 2017

Re: [Pharo-users] How to convert avoiding parser

by Sven Van Caekenberghe

> On 13 Sep 2017, at 19:44, Casimiro de Almeida Barreto <casimiro.barreto(a)gmail.com> wrote: > > Hello, > > Perhaps someone can help me with this problem: I'm saving a key pair in a mariadb/mysql table as follows: > > str := 'INSERT INTO chaves_de_encriptacao (numero_funcional, chave_privada, chave_publica) '. > str := str,'VALUES ('''. > str := str, self personId leaId asString, ''', '''. > str := str, self keyPair privateKey asAsn1DerBytes asByteArray hex, ''', '''. > str := str, self keyPair publicKey asAsn1DerBytes asByteArray hex,''')'. > > [ dbConnection execute: str ] on: Exception do: [ ^ false ]. > > And I'd like to recover the keys (SELECT * FROM chaves_de_encriptacao WHERE numero_funcional = 1010) and then reconvert in order to recover the original keys. Obviously I can do that by writting a parser that will get the hex and bring it back to binary but I'd like to avoid it. > > Question is: is there a reverse for asByteArray hex? Yes: ByteArray readHexFrom: #[ 0 1 2 3 4 5 6 7 8 9 10 ] hex. HTH, Sven

Sept. 13, 2017

Re: [Pharo-users] PlotMorph on Pharo 6.1

by Alexandre Bergel

Hi Mark, In case you are not tied to PlotMorph, you can use Roassal for your drawing. Roassal supports Grapher, which is a resurrection of GraphET. Documentation is available on: http://agilevisualization.com/AgileVisualization/Grapher/0203-Grapher.html <http://agilevisualization.com/AgileVisualization/Grapher/0203-Grapher.html> Open Pharo 6, load Roassal using: Gofer it smalltalkhubUser: 'ObjectProfile' project: 'Roassal2'; configurationOf: 'Roassal2'; loadDevelopment And type in a playground: b := RTGrapher new. ds := RTData new. ds noDot. ds points: (0 to: 3.1415 * 5 by: 0.01). ds y: #sin. ds x: #yourself. ds connectColor: (Color red alpha: 0.4). b add: ds. ds := RTData new. ds noDot. ds points: (0 to: 3.1415 * 5 by: 0.01). ds y: #cos. ds x: #yourself. ds connectColor: (Color blue alpha: 0.4). b add: ds. b You will get: Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On Sep 13, 2017, at 2:49 PM, Mark Bestley <st(a)bestley.co.uk> wrote: > > Mark Bestley <st(a)bestley.co.uk> wrote: > >> In this case shouldm't the catalog only be added to if someone actually >> takes an action to do this - then there is a chance the code would be >> checked. Otherwise rollinmg over from one release to another just >> accumulates junk. >> > > OK I am now more confused as I see that suggestion does not work. > > Looking for graphing packages I tried to load GraphET - which gives a > popup box > > GraphET has not been marked as tested for Pharo6! Do you want to > continue (installation could fail) > > Which seems to me to be a good feature, > > But does imply some packages have been added and marked as tested > without being tested which does raise a large doubt in my mind as to > what is supposed to work and how can I trust parts of the system which > are marked as working. > > >> >> >> Stephane Ducasse <stepharo.self(a)gmail.com> >> wrote: >> >>> Thanks for the report since I need PlotMorph too for a project. >>> What you see is the consequence of lack of validation of published >>> packages. This is years that I'm saying that I need someone to work on >>> that. >>> We got money from inria for Pavel to work on it but the bootstrap was >>> more important :). >>> > > > -- > Mark > >

Sept. 13, 2017

Re: [Pharo-users] PlotMorph on Pharo 6.1

by Stephan Eggermont

On 13/09/17 19:22, Mark Bestley wrote: > Unfortunatley not. That error has gone but I now get > > x := x rounded. Yes, that is the question I posed. Assignment to block variables is prohibited now? Stephan

Sept. 13, 2017

Re: [Pharo-users] catalog.pharo.org - 503 service is temporarily unavailable

by Daniel BLANC

Thanks Esteban for fixing the issue. Thanks Marcus for the explanation, I understand the situation. On Wed, Sep 13, 2017 at 11:41 AM Marcus Denker <marcus.denker(a)inria.fr> wrote: > > > > > > BTW, If you need help for system administration, I'm willing to help and > I can dedicate some time to it. Is there someone I can talk to about this ? > > > > The problem is that for now we are running on Inria servers where logins > are restrictedâ¦ for sure we will at some point move > somewhere else. If that happens, we will make a call for help for sys > admin related tasks. > > Marcus > > >

Sept. 13, 2017

Re: [Pharo-users] PlotMorph on Pharo 6.1

by st＠bestley.co.uk

Mark Bestley <st(a)bestley.co.uk> wrote: > In this case shouldm't the catalog only be added to if someone actually > takes an action to do this - then there is a chance the code would be > checked. Otherwise rollinmg over from one release to another just > accumulates junk. > OK I am now more confused as I see that suggestion does not work. Looking for graphing packages I tried to load GraphET - which gives a popup box GraphET has not been marked as tested for Pharo6! Do you want to continue (installation could fail) Which seems to me to be a good feature, But does imply some packages have been added and marked as tested without being tested which does raise a large doubt in my mind as to what is supposed to work and how can I trust parts of the system which are marked as working. > > > Stephane Ducasse <stepharo.self(a)gmail.com> > wrote: > > > Thanks for the report since I need PlotMorph too for a project. > > What you see is the consequence of lack of validation of published > > packages. This is years that I'm saying that I need someone to work on > > that. > > We got money from inria for Pavel to work on it but the bootstrap was > > more important :). > > -- Mark

Sept. 13, 2017

How to convert avoiding parser

by Casimiro de Almeida Barreto

Hello, Perhaps someone can help me with this problem: I'm saving a key pair in a mariadb/mysql table as follows: Â Â Â str := 'INSERT INTO chaves_de_encriptacao (numero_funcional, chave_privada, chave_publica) '. Â Â Â str := str,'VALUES ('''. Â Â Â str := str, self personId leaId asString, ''', '''. Â Â Â str := str, self keyPair privateKey asAsn1DerBytes asByteArray hex, ''', '''. Â Â Â str := str, self keyPair publicKeyÂ asAsn1DerBytes asByteArray hex,''')'. Â Â Â [ dbConnection execute: str ] on: Exception do: [ ^ false ]. And I'd like to recover the keys (SELECT * FROM chaves_de_encriptacao WHERE numero_funcional = 1010) and then reconvert in order to recover the original keys. Obviously I can do that by writting a parser that will get the hex and bring it back to binary but I'd like to avoid it. Question is: is there a reverse for asByteArray hex?

Sept. 13, 2017

Re: [Pharo-users] PlotMorph on Pharo 6.1

by st＠bestley.co.uk

In this case shouldm't the catalog only be added to if someone actually takes an action to do this - then there is a chance the code would be checked. Otherwise rollinmg over from one release to another just accumulates junk. Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > Thanks for the report since I need PlotMorph too for a project. > What you see is the consequence of lack of validation of published > packages. This is years that I'm saying that I need someone to work on > that. > We got money from inria for Pavel to work on it but the bootstrap was > more important :). > -- Mark

Sept. 13, 2017