July 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Displaying text in OpenGL

by Dimitris Chloupis

This the approach that Cairo uses to work with OpenGL. Cairo is doing very good job at rendering fonts. Athens wraps Cairo, so maybe if you use Athens with a modern wrapper of OpenGL for Pharo this will save all the trouble of doing it from scratch. But I have not tested this in practice so I offer no promise it will be that easy. On Fri, 22 Jul 2016 at 15:05, Thibault Raffaillac < thibault.raffaillac(a)inria.fr> wrote: > Hello, > > As in title, I would like to display text in OpenGL, the "right" way ( > https://en.wikibooks.org/wiki/OpenGL_Programming/Modern_OpenGL_Tutorial_Tex… > ). > Basically, there is one texture acting as cache for all glyphs actually > displayed on screen, and we render one quad per glyph, with proper texture > coordinates. > > Is there any such texture atlas implementation yet atop FreeType? > > Cheers, > Thibault Raffaillac > >

July 22, 2016

Re: [Pharo-users] System Browser "Implementors of..." drill down?

by Dimitris Chloupis

Looks we two have a difficult time disagreeing with each other cause we think alike. Yes it's very hard to put everything in a single tool. The window hell problem is something I have a lot issues with. Windowing systems are notorious for wasting screen estate which why I prefer custom GUIs . A big reason why I prefer GTSpotter too. It's not because I want to cram more info on my screen I actually want less. I am not a big fan of the three column browsing GUI of system browser but as tool is still very useful and very flexible. One tool I miss from Pharo is a bird eye view browser. Similar to the graphs we have seen Roassal people make showing the connection between classes and methods . Both with GTSpotter and System Browser it's easy to forget and lose track which method triggers which method which happens to me often when I study complex code. On the other hand each one of us have different way of thinking so I can definitely relate to why for someone GTSpotter may come nowhere near the 90% you mention. On Fri, 22 Jul 2016 at 15:51, Ben Coman <btc(a)openinworld.com> wrote: > On Fri, Jul 22, 2016 at 2:47 PM, Dimitris Chloupis > <kilon.alios(a)gmail.com> wrote: > > Learn to use GTSpotter , will make your experience 10 times easier and > > faster. > > Agreed for 90% of what I do, but its RealHard(TM) for a single tool to > provide a magic 100% coverage of use cases. > > The other 10% of the time I find the "Implementors of..." dialog > provides something that GTSpotter doesn't - it provides a more > permanent list you can scroll through, whereas GTSpotter is a > transitory list. Further, I recently used Squeak again and their > "Implementors of..." dialog had two additional behaviours missing from > Pharo. > > * In the "Implementors of..." code pane, selecting a message and doing > another "Implementors of..." added them as a sub-tree-level in the > existing dialog, whereas in Pharo a new "Implementors of..." window is > opened. I liked this since it provided structure that I could > navigate, instead of loosing the relationship of multiple opened > windows as I chase a chain of implementers. I suffer badly from Too > Many Windows Syndrome as it is (even if the shakes don't start until > I'm onto my third row of the task bar) > > * On a method in the list pane, menu item "More... > Remove from this > browser" > allows you you create a nice focused list of method your interested in > - and its easy to switch back forth between this methods using arrow > keys to quickly compare implementations. > > cheers -ben > > > On Fri, 22 Jul 2016 at 08:43, Norbert Fortelny < > norbert.fortelny(a)gmail.com> > > wrote: > >> > >> Thanks! > >> > >> > >> > >> -- > >> View this message in context: > >> > http://forum.world.st/System-Browser-Implementors-of-drill-down-tp4907380p4… > >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >> > > > >

July 22, 2016

Re: [Pharo-users] System Browser "Implementors of..." drill down?

by Ben Coman

On Fri, Jul 22, 2016 at 2:47 PM, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > Learn to use GTSpotter , will make your experience 10 times easier and > faster. Agreed for 90% of what I do, but its RealHard(TM) for a single tool to provide a magic 100% coverage of use cases. The other 10% of the time I find the "Implementors of..." dialog provides something that GTSpotter doesn't - it provides a more permanent list you can scroll through, whereas GTSpotter is a transitory list. Further, I recently used Squeak again and their "Implementors of..." dialog had two additional behaviours missing from Pharo. * In the "Implementors of..." code pane, selecting a message and doing another "Implementors of..." added them as a sub-tree-level in the existing dialog, whereas in Pharo a new "Implementors of..." window is opened. I liked this since it provided structure that I could navigate, instead of loosing the relationship of multiple opened windows as I chase a chain of implementers. I suffer badly from Too Many Windows Syndrome as it is (even if the shakes don't start until I'm onto my third row of the task bar) * On a method in the list pane, menu item "More... > Remove from this browser" allows you you create a nice focused list of method your interested in - and its easy to switch back forth between this methods using arrow keys to quickly compare implementations. cheers -ben > On Fri, 22 Jul 2016 at 08:43, Norbert Fortelny <norbert.fortelny(a)gmail.com> > wrote: >> >> Thanks! >> >> >> >> -- >> View this message in context: >> http://forum.world.st/System-Browser-Implementors-of-drill-down-tp4907380p4… >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >> >

July 22, 2016

Displaying text in OpenGL

by Thibault Raffaillac

Hello, As in title, I would like to display text in OpenGL, the "right" way (https://en.wikibooks.org/wiki/OpenGL_Programming/Modern_OpenGL_Tutorial_Tex…) Basically, there is one texture acting as cache for all glyphs actually displayed on screen, and we render one quad per glyph, with proper texture coordinates. Is there any such texture atlas implementation yet atop FreeType? Cheers, Thibault Raffaillac

July 22, 2016

Re: [Pharo-users] An Implementation of JSON Web Tokens

by andrew glynn

Thanks for this Norbert. It works great with Teapot microservices that are associated with specific JQuery widget instances. I can insert the token into the widget's callback to the pot so that only that widget instance can use that particular service. The way our web app works is that it generates a JSP with all the repetitive content / look and feel, and inserts JQuery widgets to display any dynamic data. Since the data I'm working on comes from a Pharo app I configure the JQuery widget and a pot, and supply the widget to the Java EE server from Seaside to generate the full page. The widget also keeps a lease open with the Seaside server and when the user leaves the page and the widget stops requesting the lease, Pharo can recycle the pot. Andrew Glynn On 7/22/2016 6:12 AM, pharo-users-request(a)lists.pharo.org wrote: > An Implementation of JSON Web Tokens -- Andrew Glynn 647-539-7228 (cell/text) â ââ âââ ââ â Burnin down the house ...

July 22, 2016

Re: [Pharo-users] [Pharo-dev] [ANN] JSONWebToken

by Norbert Hartl

> Am 22.07.2016 um 11:47 schrieb Holger Freyther <holger(a)freyther.de>: > > >> On 22 Jul 2016, at 16:17, Norbert Hartl <norbert(a)hartl.name> wrote: >> > > > Hi! > >> Taking the assumption of having 20 service images, every image would need to get back to A in order to check authorization information. The more services images you have the more load it will put on A. In a JWT use case scenario the same would look like >> >> 1. client C authenticates and receives a JWT containing authorization information. The token is signed by A >> 2. client C hands out JWT to service S >> 3. S checks the signature of A and knows that the authorization information contained is valid. >> 4. S grants C access > > thank you for the information! I have one rather specific question. How is the token normally transported from C to S? Part of the body/data of a POST/PUT/GET? A custom header inside the HTTP request? It is up to you how you like to do it. It could be: - Client C asks A for authorization and gets back a JWT in the response body - Client C adds the JWT token as HTTP Header "Authorization: Bearer [token]" to ask the service in a usual fashion - Service S checks signature of token and extracts permission set and grants them or - Client C asks service S to do something - Service S redirects C to A giving a redirect_url as query parameter in the url - A checks authorization with C and then redirects the request to the request_uri having the token as query parameter of the uri or - Client C asks service S to do something - Service S redirects C to A giving a redirect_url as query parameter in the url - A checks authorization with C and then redirects the request to the request_uri having an exchange code in the query parameters - S exchange at A the exchange code with authorization token There are plenty of scenarios possible. It depends if it is about authorization or authentication and which "standard" to use. You can always roll your own. If you have many services it could be feasible to combine all permissions you need into one JWT then send it to A. If your claims are valid you get back the signed token from A. You could then use the same token for all your servicesâ¦. Hope this helps, Norbert

July 22, 2016

Re: [Pharo-users] System Browser "Implementors of..." drill down?

by Dimitris Chloupis

Choosing a programming language is too Nonetheless GTSpotter make the navigation easier, mainly because it works hand in hand with System Browser . So you dont have to choose one or the other, rather find the workflow that fits your needs. Of course that will depend on the specifics of the situation. Another advantage of GTSpotter is that its easier to customise to your needs, I would not be suprised if GTSpotter at some point completely replace System Browser. Actually I would be suprised if it does not. On Fri, Jul 22, 2016 at 10:27 AM HernÃ¡n Morales Durand < hernan.morales(a)gmail.com> wrote: > 2016-07-22 3:47 GMT-03:00 Dimitris Chloupis <kilon.alios(a)gmail.com>: > >> Learn to use GTSpotter , will make your experience 10 times easier and >> faster. >> > > And of course, that is completely subjective :) > > HernÃ¡n > >

July 22, 2016

Re: [Pharo-users] [ANN] JSONWebToken

by Holger Freyther

> On 22 Jul 2016, at 16:17, Norbert Hartl <norbert(a)hartl.name> wrote: > Hi! > Taking the assumption of having 20 service images, every image would need to get back to A in order to check authorization information. The more services images you have the more load it will put on A. In a JWT use case scenario the same would look like > > 1. client C authenticates and receives a JWT containing authorization information. The token is signed by A > 2. client C hands out JWT to service S > 3. S checks the signature of A and knows that the authorization information contained is valid. > 4. S grants C access thank you for the information! I have one rather specific question. How is the token normally transported from C to S? Part of the body/data of a POST/PUT/GET? A custom header inside the HTTP request? kind regards holger

July 22, 2016

[ANN] JSONWebToken

by Norbert Hartl

Hi, thanks to the inquiry of Sven I published an implementation of JSONWebToken to smalltalkhub. It is available at http://smalltalkhub.com/#!/~NorbertHartl/JSONWebToken <http://smalltalkhub.com/#!/~NorbertHartl/JSONWebToken> For those who don't know JSONWebToken or short JWT pronounced "jot" is a token format suitable for authentication and authorization. The token consist of a header, a payload and a signature. The header defines crypto algorithms, compression and other things needed to read a token on reception. The payload is called a claim set which is basically a dictionary with well-known and custom keys. If we think about OAuth or OpenId the values contained map directly to JWT claims. For OpenID connect which is an identification mechanism on top of OAuth the usage of JWT is one of the building blocks. What are the advantages in using JWT? - it defines a header for encoding the content so it is quite flexible in the ways compression and encryption of the key is done - defines a payload which maps arbitrary keys and there is a set of well-known keys that implementations of OAuth, OpenID can understand - defines a signature that makes it easy to trust the information contained or to give the token to someone who is not trusted - token format is a single line string so it can be used e.g. in HTTP authentication headers A problem JWT can solve: In our company we have a lot of little REST servers serving some duties. To minimize the chaos I want to have a central authentication and authorization point. If we assume having 20 images running and we look at typical way how authorization works: there is image A (Authentication), image S (Service) und client C. Client C wants to use the service S 1. client C authenticates and retrieves authorization information from A (or from S which redirects him to A) 2. client C hands out the authorization information to S 3. S needs to check at A if the information is valid (client C could have modified it or generated it) 4. S grants C access Taking the assumption of having 20 service images, every image would need to get back to A in order to check authorization information. The more services images you have the more load it will put on A. In a JWT use case scenario the same would look like 1. client C authenticates and receives a JWT containing authorization information. The token is signed by A 2. client C hands out JWT to service S 3. S checks the signature of A and knows that the authorization information contained is valid. 4. S grants C access FYI, Norbert

July 22, 2016

Re: [Pharo-users] System Browser "Implementors of..." drill down?

by Markus Stumptner

I agree - the keyboard shortcuts will work for the initiated, but are not a replacement for the obvious menu entries that even experienced Smalltalkers from other versions will be missing in Pharo. I think it is important to keep the entry barriers low in terms of not hiding useful functionality that people will be used to from other environments. Markus On 22/07/2016 16:54, HernÃ¡n Morales Durand wrote: > This was actually implemented in older versions of Pharo (or Squeak), > the browser also included very handy buttons in the middle to save > precious clicks. > > The right thing to do is to replace the "..." non-sense with the > selected method selector, and to offer another menu item which > displays all method selectors of the currently selected method, and > let the user to decide which one to browse. > > HernÃ¡n > > 2016-07-21 14:54 GMT-03:00 Norbert Fortelny > <norbert.fortelny(a)gmail.com <mailto:norbert.fortelny@gmail.com>>: > > Something I have not figured out how to do easily in the Pharo system > browser: > I am looking at a method and want to see how a message that is > used in this > method is implemented. In other Smalltalks (e.g. Cincoms) I use > the menu > item "Implementors of..." and get a list of all the messages that > are used > in this method and can choose one to drill down. > In Pharo I get an immediate answer but only the implementors of my > original > method. > Why are there those "..." at the end of this menu item indicating > some > further choice when there is none? > How to do this drilling down in Pharo? > > > > > -- > View this message in context: > http://forum.world.st/System-Browser-Implementors-of-drill-down-tp4907380.h… > Sent from the Pharo Smalltalk Users mailing list archive at > Nabble.com. > >

July 22, 2016