March 2015 - dancer-users - lists.preshweb.co.uk

Can I convert App::Notifier::Service from Dancer 1 to Dancer2?
by Shlomi Fish 07 Aug '15

07 Aug '15

Hi all, Is there a good reason why I should *not* convert https://metacpan.org/pod/App::Notifier::Service from Dancer 1 to Dancer2? It's a simple web app, meant to run synchronously, and I can debug it by using perl -d, and last time I tried doing s/Dancer/Dancer2/g everything worked nicely. Is there a good enough reason to stay with Dancer 1? Regards, Shlomi Fish -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ http://www.shlomifish.org/humour/bits/Can-I-SCO-Now/ - "Can I SCO Now?" If it isn’t in my email, it doesn’t exist. And if the whole world says one thing and my email says something different, email will conquer. — an Israeli Linuxer. Please reply to list if it's a mailing list post - http://shlom.in/reply .

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the beauty of dancer
by Zahir Lalani 30 Apr '15

30 Apr '15

Hi All My apologies if this post is not fully appropriate, but I felt I needed to post - hope its ok. Although I have used over a dozen languages, over the last 6-8 years perl has been a favourite. But in my last job I was tasked with setting up a large team for a web based enterprise java app. It was big, SOA based took ages to get things done, even with a team of 30. I have recently moved jobs to a company that has no developers/architects and I was asked to get them into the same space as my previous company. I decided to look at all options again and choose objectively - a toolset to develop a large app with few deveopers. I seriously looked at some of the light weight java frameworks (Ninja), python, ruby and of course perl. I had used Dancer 1 for a small project only, but now Dancer2 seemed to really stand out. Perl was not 'cool' and I have had colleagues laugh at me for suggesting that as a serious option in previous jobs. But here it was down to me, and I eventually chose Dancer2, with Starman/Nginx and Postgresql as the DB. After a couple of weeks I have a the beginnings of a complex web app which is n+1 scaleable, which has a REST API module and will also have a messaging and workflow tool with a video render farm - all done in a single language and framework. Its damn quick to develop, its quick to run, even a colleague who is helping do the templating (and a php developer) is converted! Above all - it's actually fun to see the app come together so quick. Dancer2 is just amazing - the number of add-on modules is great and I can get on with the application without worrying about the nitty gritty. So - thank you to all who have been involved - you have done an amazing job. I just hope Dancer2 gets more exposure as a serious web framework that it deserves to be. Z

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Re: [dancer-users] [Dancer2] Guide for Dancer2 developers (#785)
by Henk van Oers 31 Mar '15

31 Mar '15

On Tue, 31 Mar 2015, Sawyer X wrote: [...] > We can also remove a fair portion on how to submit a pull request by linking to the CPAN-PRC wiki guide I wrote on the topic. Can you post the link to this wiki? Thx, Henk

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serializer config
by Zahir Lalani 30 Mar '15

30 Mar '15

Hi The only info I can find on serializer configs for JSON in the yaml file, relates to the serializer: JSON. How does one configure the engine to enable allow_blessed from within the central config? Z

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Re: [dancer-users] [Dancer2-Plugin-DBIC] This plugin must be callable by other plugins (#9)
by Henk van Oers 23 Mar '15

23 Mar '15

https://github.com/ironcamel/Dancer2-Plugin-DBIC/pull/9#issuecomment-848124… >> Next is a patch to Dancer2::Plugin.pm to effectuate the use. > > Shouldn't the Dancer2::Plugin.pm changes happen first? The current (broken) Dancer2::Plugin.pm does nothing with this extra parameter and works like before. But see https://github.com/PerlDancer/Dancer2/pull/865 "We're currently trying to overhaul the entire plugin system. We have two competing implementations (one by @yanick and one by @veryrusty) and I hope we will be able to resolve them soon enough." That is very good news. I can stop working on D2 plugins and just wait.

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Memory use of Dancer2 running under Starman
by Andrew Beverley 20 Mar '15

20 Mar '15

Hi dancers, I'm trying to get an idea of what is a "normal" value in terms of memory use of Dancer2 running under Starman. I realise this is a "how long is a piece of string" question, but I would appreciate some replies to make a comparison. I'm finding it's roughly 100MB per worker, which seems to be roughly the case regardless of the application. What do other people's run at? Is there any way I can reduce the memory use and/or where should I look to do so? I'm running 10 different Dancer2 applications on a VPS with 4GB of memory. Each application has 2 Starman workers. This is about the limit of what I can run before the memory on the server tops out. I'd like to get more applications per server. The applications generally have fairly light-utilisation, but my VPS provider has disabled swap space, so they can't be swapped out when they're not being used unfortunately. Thanks, Andy

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Public web server by default is insecure
by Gabor Szabo 20 Mar '15

20 Mar '15

When we launch a newly created Dancer2 application it will listen on every interface of the computer. So anyone on the network will be able to access it. This can be good for a production server, but it is quite insecure as a development practice. Wouldn't it be more secure to allow only 127.0.0.1 by default and make it easy to allow other interfaces as well? What do you think? Gabor

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return redirect vs return
by David H 20 Mar '15

20 Mar '15

So I had this question and I couldn't find any answer, since the two options were giving me confusion. I wanted t pass control off to another route if a certain action happened. I had this in a route: if ($actionHappened) { redirect '/CheckOffOrderItem/'; } and it was working fine, it would pass control off to that route and then any return would go to the page and return what I wanted. I then went to add another line for something else below this one if ($theOtherThingHappened) { redirect '/CheckOffProduct/' } and it worked, about twice, then stopped working and wouldn't process the redirect, it would get to the condition and go through but just skip processing the route and continue with the existing route, so I read somewhere that "return redirect" should be used and not "redirect" when redirecting. Is this true? and why? My top one is still working and hasn't stopped but I want to know what the logic behind these two are. When I changed the second one to 'return redirect' it started working again. Thanks, David Hancock

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serialiser scope
by Zahir Lalani 19 Mar '15

19 Mar '15

Hi All A little confused about the serialiser scope. I get that in the config file, it will apply to the entire application. I have a need to setup template driven routes and ajax routes. So I have a number of route files, and all use the app name to link the routes into one application. Had assumed that the “set serialiser “ would be active in the current package only (i.e. the ajax routes file) but it seems it applies to the application since all routes are linked into the same application. I have hunted for clues, but in all honesty I am a little confused as to the solution. I know creating a separate app would work, but these routes are part of the same app and need to be centrally controlled in terms of session management etc. Any advice most appreciated Z

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serialize
by Zahir Lalani 19 Mar '15

19 Mar '15

Hi In order work around the routing issue I posted earlier, I am trying to serialise the output but I get nulls. The dump of the output structure is: $VAR1 = [ bless( { 'org_name' => 'Fashion', 'id' => 3 }, 'org_list_dom' ), bless( { 'org_name' => 'Market', 'id' => 4 }, 'org_list_dom' ), bless( { 'org_name' => 'Property', 'id' => 5 }, 'org_list_dom' ), bless( { 'org_name' => 'Misc', 'id' => 6 }, 'org_list_dom' ) Passing this ($res) into serialize: my $json = to_json( $res, { allow_blessed => 1, convert_blessed => 1 } ); gives [null,null,null,null] Any clues as to what I may be doing wrong? Z

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