February 2020 - Pharo-users

[Pharo8-api-change] announcer for model

by Hilaire

Hi, Now Model are required to understand announcer, for example in: UITheme>>newTextEntryIn: aThemedMorph for: aModel get: getSel set: setSel class: aClass getEnabled: enabledSel help: helpText What is the rational behind, should my model be subclass of Model (which I prefer not) or implement announcer? Then, how should it be cleanup? The RubPLuggableText* classes replacement breaks my code in two places. In P8 I see these classes are in Compatibility-toBeDEprecated package.. Hilaire -- Dr. Geo http://drgeo.eu

Feb. 26, 2020

Re: [Pharo-users] DNS over HTTPS (DoH) in Pharo

by Erik Stel

Sven, Thank you very much. The new package is really well done (again ;-). For others/future readers: although not explicitly explained so by Sven, the first examples will not work for all addresses. The first address returned by the Cloudflare API can be another named address instead of IP address (a kind of redirect). Therefore using the new package is more than just robust, it offers more functionality as well. Don't be shy, use the full package and use the NeoSimplifiedDNSClient class! Trying all (except last) examples using 'www.nos.nl' as hostname will result in an error, because the first answered address will be 'nos.nl'. The second answered address wil be the actual IP address. Regards, Erik -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Feb. 26, 2020

Re: [Pharo-users] [ANN] Open source Pharo application "mediaclue"

by Brodbeck Andreas

> Am 25.02.2020 um 19:46 schrieb Esteban Maringolo <emaringolo(a)gmail.com>: > > Hi Andreas, > > Thanks for sharing the whole stack and how to build it from the ground up. Very welcome. I'm so happy that Pharo et.al. exists - I'm not shure if I would still be a developer not having the joy of Smalltalk in the toolbox! > > One thing I noticed is that you are using the Plupload component? > How was that integration with Seaside done? Is it available separately? (It's not separately as a package, unfortunately) The integration needed some interwoven handshaking between Pharo, JavaScript, AJAX and ( ...drumroll... ) a little PHP! Good old ugly PHP is used behind the nginx webserver solely to accept the data-heavy uploading, while Pharo stays calm. Does a nice worker job, good ol' bro' PHP ;-) Cheers, Andreas

Feb. 25, 2020

DNS over HTTPS (DoH) in Pharo

by Sven Van Caekenberghe

Hi, Today Firefox switched over to using 'DNS over HTTPS (DoH)' by default. https://blog.mozilla.org/netpolicy/2020/02/25/the-facts-mozillas-dns-over-h… We can do this in Pharo as well, even out of the box (minus the interpretation of the results, but still). First, what is this ? A good description is: https://developers.cloudflare.com/1.1.1.1/dns-over-https/ Using the Cloudflare server, we can do the following in Pharo, using the JSON wire format. ZnClient new url: 'https://cloudflare-dns.com/dns-query'; accept: 'application/dns-json'; queryAt: #name put: 'pharo.org'; queryAt: #type put: 'A'; contentReader: [ :entity | STONJSON fromString: entity contents ]; get. The actual address can be accessed inside the returned result. SocketAddress fromDottedString: (((ZnClient new url: 'https://cloudflare-dns.com/dns-query'; accept: 'application/dns-json'; queryAt: #name put: 'pharo.org'; queryAt: #type put: 'A'; contentReader: [ :entity | STONJSON fromString: entity contents ]; get) at: #Answer) first at: #data). If you load the following code, https://github.com/svenvc/NeoDNS it is just as easy to use the binary UDP wire format. ZnClient new url: 'https://cloudflare-dns.com/dns-query'; accept: 'application/dns-message'; contentWriter: [ :message | ZnEntity with: message asByteArray type: 'application/dns-message' ]; contentReader: [ :entity | DNSMessage readFrom: entity readStream ]; contents: (DNSMessage addressByName: 'pharo.org'); post. Again, the actual address can be accessed inside the returned object. (ZnClient new url: 'https://cloudflare-dns.com/dns-query'; accept: 'application/dns-message'; contentWriter: [ :message | ZnEntity with: message asByteArray type: 'application/dns-message' ]; contentReader: [ :entity | DNSMessage readFrom: entity readStream ]; contents: (DNSMessage addressByName: 'pharo.org'); post) answers first address. Incidentally, a more robust answer can be got as follows: NeoSimplifiedDNSClient default addressForName: 'pharo.org'. Sven

Feb. 25, 2020

Re: [Pharo-users] [ANN] Open source Pharo application "mediaclue"

by Esteban Maringolo

Hi Andreas, Thanks for sharing the whole stack and how to build it from the ground up. One thing I noticed is that you are using the Plupload component? How was that integration with Seaside done? Is it available separately? Thanks! Esteban A. Maringolo On Tue, Feb 25, 2020 at 10:41 AM Brodbeck Andreas <andreas.brodbeck(a)mindclue.ch> wrote: > > Hi all > > I'm a Pharo lover since many years. A huge thanks to all of you, making Pharo possible! As a giving back I would like to open source some of my business projects (Thanks to my supporting customers, too). The first is a web based media assets management called "mediaclue" (Think of it as a image/audio/video/document sharing platform, e.g. for teachers inside a school): > > *********************************************** > https://github.com/talk-small-be-open/mediaclue > *********************************************** > > (Everything is ready for simple install into a fresh Linux server with included Ansible provisioning scripts to create the whole appliance) > > Cheers! > Andreas > > P.S. The UI language is still german at the moment, but that should turn multilanguage eventually > > ----------------------------------------- > Brot? www.brotrezept.ch! > > Andreas Brodbeck > Software-Macher > mindclue GmbH > Dipl. El.-Ing. ETH > > +41 55 622 26 24 > www.mindclue.ch > ----------------------------------------- > >

Feb. 25, 2020

Re: Problem with ZnWebSocket and closed connections

by Davide Varvello

Hi Sven, It's working! Thank you very much Davide Sven Van Caekenberghe-2 wrote > Hi Davide, > > First I'll explain why you see a difference in behaviour, then I'll give > you a solution. > > Network connections are expensive resources, most servers try to close > them as soon as possible when they are not used. > > Zinc HTTP Components does not normally close connections by itself, > although timeouts do naturally occur. > > The WebSocket code normally loops on the server side when timeouts occur > while waiting for incoming messages (more specifically in > ZnWebSocket>>#runWith:). Note that even though it loops, there is no > actual communication. > > Both previous facts, not closing unused connections and looping on > timeouts, result in a working echo/chat example, when run locally. > > When you put a proxy in front of this, the proxy (like nginx) might decide > to close an unused connection. This is allowed and it is what you are > seeing. This is not an error and thus normal. > > Of course, you might want to keep such connection open for longer, even if > they are not used. This can be done by keeping them alive. Note however > that this might result in many open connections. > > How do you keep a connection alive ? > > One solution is to do this at the application level. > ZnWebSocketStatusHandler does this by sending a message every second. > > The WebSocket protocol (https://tools.ietf.org/html/rfc6455) does define a > number of control messages, all which were already implemented as such. > Two of these messages, ping & pong, are meant to be used for implementing > keep alive. Client side, this was already done > (ZnWebSocket>>#handleControlFrame:). > > I now added automatic keep alive message sending server side as well. > > This can be seen in the updated implementation of ZnWebSocket>>#runWith: > > https://github.com/svenvc/zinc/commit/9073acc2fad197c2787c6cd0f4d315981ebb9… > > Now, whenever the read times out (as defined by the socket stream's > timeout, a Zn setting), a ping control packet is sent to keep the > connection alive, the client will answer with a pong, and then the server > loops. > > This should be sufficient to solve your issue (but both the proxy's as > well as the Zn timeout need to be compatible, Zn's needs to be smaller). > > Please let me know if this works for you. > > Regards, > > Sven > >> On 23 Feb 2020, at 18:19, Davide Varvello via Pharo-users < > pharo-users@.pharo > > wrote: >> >> >> From: Davide Varvello < > varvello@ > > >> Subject: Re: Problem with ZnWebSocket and closed connections >> Date: 23 February 2020 at 18:19:02 GMT+1 >> To: > pharo-users@.pharo >> >> >> Hi, >> >> I put nginx as a websocket proxy and I run the ZnWebSocketEchoHandler. >> Unfortunately also with this configuration the connection closes it after >> a >> couple of minutes of inactivity >> >> Cheers >> Davide >> >> >> >> -- >> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >> >> >> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Feb. 25, 2020

Re: [Pharo-users] [ANN] Open source Pharo application "mediaclue"

by Sven Van Caekenberghe

Hi Andreas, It is good to hear about successful projects. It is even better when the customer and developer are both happy. And it is totally awesome that you are sharing this as open source as a way of giving back. Thank you! I briefly clicked around in the application and it felt very responsive (i.e. fast), which is not easy for a media management app. Great work. Hopefully this will inspire others by showing them what is possible. Sven > On 25 Feb 2020, at 14:40, Brodbeck Andreas <andreas.brodbeck(a)mindclue.ch> wrote: > > Hi all > > I'm a Pharo lover since many years. A huge thanks to all of you, making Pharo possible! As a giving back I would like to open source some of my business projects (Thanks to my supporting customers, too). The first is a web based media assets management called "mediaclue" (Think of it as a image/audio/video/document sharing platform, e.g. for teachers inside a school): > > *********************************************** > https://github.com/talk-small-be-open/mediaclue > *********************************************** > > (Everything is ready for simple install into a fresh Linux server with included Ansible provisioning scripts to create the whole appliance) > > Cheers! > Andreas > > P.S. The UI language is still german at the moment, but that should turn multilanguage eventually > > ----------------------------------------- > Brot? www.brotrezept.ch! > > Andreas Brodbeck > Software-Macher > mindclue GmbH > Dipl. El.-Ing. ETH > > +41 55 622 26 24 > www.mindclue.ch > ----------------------------------------- > >

Feb. 25, 2020

[ANN] Open source Pharo application "mediaclue"

by Brodbeck Andreas

Hi all I'm a Pharo lover since many years. A huge thanks to all of you, making Pharo possible! As a giving back I would like to open source some of my business projects (Thanks to my supporting customers, too). The first is a web based media assets management called "mediaclue" (Think of it as a image/audio/video/document sharing platform, e.g. for teachers inside a school): *********************************************** https://github.com/talk-small-be-open/mediaclue *********************************************** (Everything is ready for simple install into a fresh Linux server with included Ansible provisioning scripts to create the whole appliance) Cheers! Andreas P.S. The UI language is still german at the moment, but that should turn multilanguage eventually ----------------------------------------- Brot? www.brotrezept.ch! Andreas Brodbeck Software-Macher mindclue GmbH Dipl. El.-Ing. ETH +41 55 622 26 24 www.mindclue.ch -----------------------------------------

Feb. 25, 2020

Re: Ubuntu64 install fine, would like to port to Slackware64

by tty

I was able to launch both the launcher and the latest 9.0 image without error by creating symlinks in /usr/lib to the appropriate libraries in /usr/lib64 libcurl-gnutls.so.4 -> /usr/lib64/libcurl.so libgit2.so -> /usr/lib64/libgit2.so libgit2.so.0.28.3 -> /usr/lib64/libgit2.so.0.28.3 libgit2.so.28 -> libgit2.so.0.28.3 cheers. t -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Feb. 25, 2020

Re: [Pharo-users] Loading Bootstrap in Pharo 8

by DavidBajger

Hi! Just evaluate following statement in fresh P8 image. It will load Seaside latest version together with Torsten's Bootstrap4 library. Metacello new baseline:'Bootstrap4'; repository: 'github://astares/Seaside-Bootstrap4:master/src'; load Cheers! David ----- David Bajger -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Feb. 25, 2020