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

running an Apache cgi via Dancer
by Puneet Kishor 07 Dec '11

07 Dec '11

I might have asked this question earlier, but in any case, here goes again. Hopefully one of knowledgable folks can guide me toward the right path. I have my Dancer app running behind an Apache2 proxy, so when the user goes to `http://server/app`, apache serves content retrieved from `http://127.0.0.1:port/` that is being served by Starman+Dancer. My application also serves maps via Apache+MapServer from `http://server/cgi-bin/mapserv`. In reality, I have not just `/app` but `/app1`, `/app2`, `/app3` and so on. In order to send `/app<n>` specific MapServer information to the cgi program, I have shell script wrappers called `app1`, `app2`, `app3` in my cgi-bin directory. Their content is like so ("app<n>.map" is a "mapfile" for app<n>. There is one for each app). #!/bin/sh MAPSERV="/path/to/punkish/cgi-bin/mapserv" MAPFILE="/path/to/app<n>.map" if [ "${REQUEST_METHOD}" = "GET" ]; then if [ -z "${QUERY_STRING}" ]; then QUERY_STRING="map=${MAPFILE}" else QUERY_STRING="map=${MAPFILE}&${QUERY_STRING}" fi exec ${MAPSERV} else echo "Sorry, I only understand GET requests." fi exit 1 With that background, I now have all my app-specific stuff in my Dancer directory, except this shell script that is in the apache cgi-bin directory. This makes management difficult, and I would like to move these files to the Dancer directory. Except, I haven't been able to figure out how to execute apache cgi-bin programs from Dancer. I tried the following in my app but I get a 502 Proxy Error. # http://server/app/ms get '/ms' => sub { my $MAPSERV = '/path/to/punkish/cgi-bin/mapserv'; my $MAPFILE = '/path/to/app.map'; my $params = params(); my $QUERY_STRING = ""; while (my ($k, $v) = each %$params) { $QUERY_STRING .= "$k=$v"; } $QUERY_STRING .= "&$MAPFILE"; exec("$MAPSERV $QUERY_STRING"); }; In other words, I want to take the /ms route and send it off to Apache to execute (via Apache's cgi interface) and return the content via Dancer. That sounds like I want to use Dancer as a proxy for Apache while Apache is already a proxy for Dancer, but actually, all I want is to store certain files under the Dancer app directory, but let Apache handle them instead of Dancer. Suggestions? -- Puneet Kishor

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a couple of questions re. Plugins
by Puneet Kishor 02 Dec '11

02 Dec '11

1. Does a plugin have to reside under Dancer::Plugin::MyPlugin? Or, can it be situated anywhere, like, for example, under app/lib? 2. Is it possible to call a method in the application from within MyPlugin? Here is what I mean -- In my app.pm, I have a method called sub opts { } I typically set a bunch of template options in the above sub routine, and use it like so get '/' => sub { my $opts = opts(); template 'index', $opts; }; I am creating plugin that automatically generates a web page like so return engine('template')->apply_layout($content); I would like to run `app::opts()`, and pass the $opts to the template from within the plugin. I am at a loss how to do that. -- Puneet Kishor

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getting the routes info for `load_app` loaded apps
by Puneet Kishor 02 Dec '11

02 Dec '11

I have written a plugin (modeled after Dancer::Plugin::SiteMap) that allows me to create a few standard routes that are available in all applications. For example, by adding my plugin (I call it Dancer::Plugin::Meta), my applications automatically get a route called http://server/app/meta/author which returns the author information set in the config file. This works rather well, and has become a key part of the app (there are other fairly useful routes besides author that get added, such as license, version, and most importantly, a listing of all the routes much like the SiteMap). Now I have an application where sub-applications are loaded using load_app 'app1', prefix -> '/app1'; load_app 'app2', prefix -> '/app2'; This also works rather well, except now my plugin doesn't work. My base app is reachable at `http://server/baseapp` so the following URI works `http://server/baseapp/meta/author` but `http://server/baseapp/app1/meta/author` doesn't work... I get the void. Additionally, while `http://server/baseapp/meta/author` works, `http://server/baseapp/meta/resources` does not work. Normally, /meta/resources returns a listing of all the resources, but now I get the following error "Serializer (Dancer::Serializer::JSON) failed at serializing HASH(0x7f9ae4696f00):\nencountered object '(?^:^\\/baseapp(?:\\/)?$)', but neither allow_blessed nor convert_blessed settings are enabled at /opt/local/lib/perl5/site_perl/5.14.1/JSON.pm line 154.\n" Would appreciate any guidance on how to retrieve all the URIs for the app loaded using load_app and resolving the above errors. -- Puneet Kishor

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No more collisions of routes with multiple Dancer(1) apps!
by Perlover 02 Dec '11

02 Dec '11

Hello All, I made a changes for Dancer1! Please to see pull request of https://github.com/sukria/Dancer/pull/703 I added new option to config: routes_per_app If it is true in config routes will be work only for applications where i its defined. If not true - it works as worked before (backward compatible) I wrote a test for it All tests are passed Now i will test it in my real project If i will find a some bugs i will notice you Best regards, Perlover P.S. And dear author(s) - please approve & merge other commit too - it fix bug with request->header() - https://github.com/sukria/Dancer/pull/702

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D::P::Db
by Puneet Kishor 29 Nov '11

29 Nov '11

I must be doing something wrong, but don't know what. I have the following database definitions in my config file plugins: Database: connections: pg: driver: 'Pg' .. .. mysql: driver: 'mysql' .. .. Then, in my code my $sth1 = database->('pg')->prepare(qq{ SELECT blah }); $sth1->execute(); and my $sth2 = database->('mysql')->prepare(qq{ SELECT blah }); $sth2->execute(); But, I get the following error in my log file Can't connect to data source 'dbi:' because I can't work out what driver to use (it doesn't seem to contain a 'dbi:driver:' prefix and the DBI_DRIVER env var is not set) at /opt/local/lib/perl5/site_perl/5.14.1/Dancer/Plugin/Database.pm line 161 in /opt/local/lib/perl5/site_perl/5.14.1/Dancer/Handler.pm l. 90 I am using Dancer::Plugin::Database 1.51 -- Puneet Kishor

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dancerctl - need feedback
by Nick Knutov 29 Nov '11

29 Nov '11

Hello, I wrote small tool that should make our life much more comfortable. It's like apachectl for Dancer. https://github.com/knutov/dancerctl This is working prototype. Any comments, especially about default paths and values, are welcome. -- Best Regards, Nick Knutov http://knutov.com ICQ: 272873706 Voice: +7-904-84-23-130

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dancerctl 0.04 released
by Nick Knutov 28 Nov '11

28 Nov '11

dancerctl 0.04 released. https://github.com/knutov/dancerctl Main changes: * Command line parameters order changed dancerctl action [appname [environment]] * help updated * added init - creates config file for app dancerctl init appname path [force] * autoreload simplification: autoreload_inc removed use "autoreload: "path1,path2" instead * change default config filename .dancer -> .dancerctl and dancer.conf -> dancerctl.conf * env_alias feature env_alias: dev: development prod: production dancerctl start app dev # will start development * autodetect positions of action and app dancerctl start app dancerctl app start -- Best Regards, Nick Knutov http://knutov.com ICQ: 272873706 Voice: +7-904-84-23-130

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Advent Calendar time again!
by David Precious 27 Nov '11

27 Nov '11

Hi all, It's about time we started preparing for the 2011 advent calendar - I think we should do it again this year as it was successful last year and drew a lot of valuable attention to the project. We still have the app from last year, and luckily we built it to support multiple years nicely enough, so this year all we need to do is write the articles (although, to be fair, that's the harder and more time-consuming part! :) ) I've renamed the repository from advent-calendar-2010 to just advent-calendar - you can find it at: https://github.com/PerlDancer/advent-calendar For anyone who didn't see last year's advent calendar, it's at: http://advent.perldancer.org/2010 I've added some article ideas to the README in the repo; additional ideas and volunteers to write would be very gratefully appreciated! Submissions can be made as pull requests, mails to the list or to me personally; I'm happy to help curate the work towards this in order to get it sorted in time for the 1st December. I think, among other interesting posts, we should be able to manage a few posts on what Dancer2 is going to bring, and decision decisions etc. Cheers Dave P -- David Precious ("bigpresh") http://www.preshweb.co.uk/ "Programming is like sex. One mistake and you have to support it for the rest of your life". (Michael Sinz)

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dancerctl poll ;)
by Nick Knutov 24 Nov '11

24 Nov '11

Which is better? dancerctl app start|stop [environment] or dancerctl start|stop app [environment] Or may be it's better to have reserved words (start|stop|restart|etc) and try to autodetect first two parameters which one is app_name and which one is action? Also, the new stable version will be available soon. The new and much better documentation is already available at https://github.com/knutov/dancerctl/tree/dev -- Best Regards, Nick Knutov http://knutov.com ICQ: 272873706 Voice: +7-904-84-23-130

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dancerctl 0.02
by Nick Knutov 24 Nov '11

24 Nov '11

dancerctl 0.02 just released https://github.com/knutov/dancerctl New version, new documentation and it's now stable. We are already using it in production on our hosting. Example of config file for our billing: cat ~/.dancer/bill =================== path: bill autostart: 1 socket_path: ~/ env: production production: method: socket workers: 4 Part of `dancerctl status` =========================== Application : bill Running since: Thu Nov 24 08:18:47 2011 Environment : production Listen at : /home/kola//bill.sock `dancerctl restartall` ======================= Stopped bill Application 'bill' started in 'production' mode. Listen on /home/kola//bill.sock -- Best Regards, Nick Knutov http://knutov.com ICQ: 272873706 Voice: +7-904-84-23-130

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