diff --git a/chapters/basic-app.md b/chapters/basic-app.md index 855b1e8..4198654 100644 --- a/chapters/basic-app.md +++ b/chapters/basic-app.md @@ -1 +1,91 @@ # A Basic Dancer Web App + +In this chapter we will get the most basic Dancer2 application up and +running. It will take about a minute. + +## Generating an App + +Dancer2 comes with a command line program which allows you to start a +new application easily. It's called `dancer2` and you run it like +this: + + $ dancer2 gen -a [AppName] + +Our application is a Todo list. So we'll call it "Todo" and run +`dancer2` like this: + + $ dancer2 gen -a Todo + +This command will create a directory called `Todo` and will write a +lot of new files into that directory - telling you what it is doing as +it does it. I got the following output: + + + Todo + + Todo/cpanfile + + Todo/Makefile.PL + + Todo/MANIFEST.SKIP + + Todo/config.yml + + Todo/.dancer + + Todo/public + + Todo/public/dispatch.fcgi + + Todo/public/500.html + + Todo/public/dispatch.cgi + + Todo/public/favicon.ico + + Todo/public/404.html + + Todo/public/images + + Todo/public/images/perldancer-bg.jpg + + Todo/public/images/perldancer.jpg + + Todo/public/css + + Todo/public/css/style.css + + Todo/public/css/error.css + + Todo/public/javascripts + + Todo/public/javascripts/jquery.js + + Todo/t + + Todo/t/001_base.t + + Todo/t/002_index_route.t + + Todo/lib + + Todo/lib/Todo.pm + + Todo/views + + Todo/views/index.tt + + Todo/views/layouts + + Todo/views/layouts/main.tt + + Todo/environments + + Todo/environments/production.yml + + Todo/environments/development.yml + + Todo/bin + + Todo/bin/app.psgi + +We'll look in more detail at these files soon, but firstly, let's run +our new Dancer2 app. Because what `dancer2` has given us is already a +runnable application. It doesn't do much yet, but that's what the rest +of this book is for. + +Dancer2 (like most modern Perl web frameworks) is based on a protocol +called PSGI (Perl Server Gateway Interface). PSGI allows us to write +web applications that are completely independent of their deployment +environment and this makes it far easier to write, debug and test web +applications that it has ever been before. There is also a toolkit for +working with PSGI applications which is called Plack. And we need to +turn to Plack in order to demonstrate our new web application working. + +At the bottom of our list of new files, you'll see `app.psgi`. That is +the actual program that is used to run our application. Just drop that +file into any PSGI-aware environment to make your web application +available. But what do I mean by a "PSGI-aware environment"? Well, +we'll look into that in more detail later on, but, for now, we'll use +a program called `plackup` which is part of the Plack toolkit and +allows use to run a PSGI application very easily. Simply run this on a +command line: + + $ plackup bin/app.psgi + +If all is well, then you'll see the following: + + HTTP::Server::PSGI: Accepting connections at http://0:5000/ + +This tells us that `plackup` is using HTTP::Server::PSGI to run a web +server which is running on our local system and listening on +port 5000. If you open a web browser and visit http://localhost:5000/ +you will see your web application looking like this: + +![](img/step01.png) diff --git a/code/step01/Todo/.dancer b/code/step01/Todo/.dancer new file mode 100644 index 0000000..e69de29 diff --git a/code/step01/Todo/MANIFEST b/code/step01/Todo/MANIFEST new file mode 100644 index 0000000..0c90fb3 --- /dev/null +++ b/code/step01/Todo/MANIFEST @@ -0,0 +1,24 @@ +MANIFEST +cpanfile +Makefile.PL +MANIFEST.SKIP +config.yml +.dancer +public/dispatch.fcgi +public/500.html +public/dispatch.cgi +public/favicon.ico +public/404.html +public/images/perldancer-bg.jpg +public/images/perldancer.jpg +public/css/style.css +public/css/error.css +public/javascripts/jquery.js +t/001_base.t +t/002_index_route.t +lib/Todo.pm +views/index.tt +views/layouts/main.tt +environments/production.yml +environments/development.yml +bin/app.psgi diff --git a/code/step01/Todo/MANIFEST.SKIP b/code/step01/Todo/MANIFEST.SKIP new file mode 100644 index 0000000..534ade5 --- /dev/null +++ b/code/step01/Todo/MANIFEST.SKIP @@ -0,0 +1,17 @@ +^\.git\/ +maint +^tags$ +.last_cover_stats +Makefile$ +^blib +^pm_to_blib +^.*.bak +^.*.old +^t.*sessions +^cover_db +^.*\.log +^.*\.swp$ +MYMETA.* +^.gitignore +^.svn\/ +^Todo- diff --git a/code/step01/Todo/Makefile.PL b/code/step01/Todo/Makefile.PL new file mode 100644 index 0000000..4ceee44 --- /dev/null +++ b/code/step01/Todo/Makefile.PL @@ -0,0 +1,26 @@ +use strict; +use warnings; +use ExtUtils::MakeMaker; + +# Normalize version strings like 6.30_02 to 6.3002, +# so that we can do numerical comparisons on it. +my $eumm_version = $ExtUtils::MakeMaker::VERSION; +$eumm_version =~ s/_//; + +WriteMakefile( + NAME => 'Todo', + AUTHOR => q{YOUR NAME }, + VERSION_FROM => 'lib/Todo.pm', + ABSTRACT => 'YOUR APPLICATION ABSTRACT', + ($eumm_version >= 6.3001 + ? ('LICENSE'=> 'perl') + : ()), + PL_FILES => {}, + PREREQ_PM => { + 'Test::More' => 0, + 'YAML' => 0, + 'Dancer2' => 0.203001, + }, + dist => { COMPRESS => 'gzip -9f', SUFFIX => 'gz', }, + clean => { FILES => 'Todo-*' }, +); diff --git a/code/step01/Todo/bin/app.psgi b/code/step01/Todo/bin/app.psgi new file mode 100755 index 0000000..bb78cce --- /dev/null +++ b/code/step01/Todo/bin/app.psgi @@ -0,0 +1,9 @@ +#!/usr/bin/env perl + +use strict; +use warnings; +use FindBin; +use lib "$FindBin::Bin/../lib"; + +use Todo; +Todo->to_app; diff --git a/code/step01/Todo/config.yml b/code/step01/Todo/config.yml new file mode 100644 index 0000000..d4b26b2 --- /dev/null +++ b/code/step01/Todo/config.yml @@ -0,0 +1,52 @@ +# This is the main configuration file of your Dancer2 app +# env-related settings should go to environments/$env.yml +# all the settings in this file will be loaded at Dancer's startup. + +# Your application's name +appname: "Todo" + +# The default layout to use for your application (located in +# views/layouts/main.tt) +layout: "main" + +# when the charset is set to UTF-8 Dancer2 will handle for you +# all the magic of encoding and decoding. You should not care +# about unicode within your app when this setting is set (recommended). +charset: "UTF-8" + +# template engine +# simple: default and very basic template engine +# template_toolkit: TT + +template: "simple" + +# template: "template_toolkit" +# engines: +# template: +# template_toolkit: +# start_tag: '<%' +# end_tag: '%>' + +# session engine +# +# Simple: in-memory session store - Dancer2::Session::Simple +# YAML: session stored in YAML files - Dancer2::Session::YAML +# +# Check out metacpan for other session storage options: +# https://metacpan.org/search?q=Dancer2%3A%3ASession&search_type=modules +# +# Default value for 'cookie_name' is 'dancer.session'. If you run multiple +# Dancer apps on the same host then you will need to make sure 'cookie_name' +# is different for each app. +# +#engines: +# session: +# Simple: +# cookie_name: testapp.session +# +#engines: +# session: +# YAML: +# cookie_name: eshop.session +# is_secure: 1 +# is_http_only: 1 diff --git a/code/step01/Todo/cpanfile b/code/step01/Todo/cpanfile new file mode 100644 index 0000000..4303ca1 --- /dev/null +++ b/code/step01/Todo/cpanfile @@ -0,0 +1,11 @@ +requires "Dancer2" => "0.203001"; + +recommends "YAML" => "0"; +recommends "URL::Encode::XS" => "0"; +recommends "CGI::Deurl::XS" => "0"; +recommends "HTTP::Parser::XS" => "0"; + +on "test" => sub { + requires "Test::More" => "0"; + requires "HTTP::Request::Common" => "0"; +}; diff --git a/code/step01/Todo/environments/development.yml b/code/step01/Todo/environments/development.yml new file mode 100644 index 0000000..096e561 --- /dev/null +++ b/code/step01/Todo/environments/development.yml @@ -0,0 +1,23 @@ +# configuration file for development environment + +# the logger engine to use +# console: log messages to STDOUT (your console where you started the +# application server) +# file: log message to a file in log/ +logger: "console" + +# the log level for this environment +# core is the lowest, it shows Dancer2's core log messages as well as yours +# (debug, info, warning and error) +log: "core" + +# should Dancer2 consider warnings as critical errors? +warnings: 1 + +# should Dancer2 show a stacktrace when an 5xx error is caught? +# if set to yes, public/500.html will be ignored and either +# views/500.tt, 'error_template' template, or a default error template will be used. +show_errors: 1 + +# print the banner +startup_info: 1 diff --git a/code/step01/Todo/environments/production.yml b/code/step01/Todo/environments/production.yml new file mode 100644 index 0000000..41b436f --- /dev/null +++ b/code/step01/Todo/environments/production.yml @@ -0,0 +1,16 @@ +# configuration file for production environment + +# only log warning and error messsages +log: "warning" + +# log message to a file in logs/ +logger: "file" + +# don't consider warnings critical +warnings: 0 + +# hide errors +show_errors: 0 + +# disable server tokens in production environments +no_server_tokens: 1 diff --git a/code/step01/Todo/lib/Todo.pm b/code/step01/Todo/lib/Todo.pm new file mode 100644 index 0000000..ad3cf5f --- /dev/null +++ b/code/step01/Todo/lib/Todo.pm @@ -0,0 +1,10 @@ +package Todo; +use Dancer2; + +our $VERSION = '0.1'; + +get '/' => sub { + template 'index'; +}; + +true; diff --git a/code/step01/Todo/public/404.html b/code/step01/Todo/public/404.html new file mode 100644 index 0000000..c2f4032 --- /dev/null +++ b/code/step01/Todo/public/404.html @@ -0,0 +1,18 @@ + + + + + + Error 404 + + + +

Error 404

+
+

Page Not Found

Sorry, this is the void.

+
+ + + diff --git a/code/step01/Todo/public/500.html b/code/step01/Todo/public/500.html new file mode 100644 index 0000000..d84ebbc --- /dev/null +++ b/code/step01/Todo/public/500.html @@ -0,0 +1,18 @@ + + + + + + Error 500 + + + +

Error 500

+
+

Internal Server Error

Wooops, something went wrong

+
+ + + diff --git a/code/step01/Todo/public/css/error.css b/code/step01/Todo/public/css/error.css new file mode 100644 index 0000000..8a5e831 --- /dev/null +++ b/code/step01/Todo/public/css/error.css @@ -0,0 +1,85 @@ +body { + font-family: Lucida,sans-serif; +} + +h1 { + color: #AA0000; + border-bottom: 1px solid #444; +} + +h2 { color: #444; } + +pre { + font-family: "lucida console","monaco","andale mono","bitstream vera sans mono","consolas",monospace; + font-size: 12px; + border-left: 2px solid #777; + padding-left: 1em; +} + +footer { + font-size: 10px; +} + +span.key { + color: #449; + font-weight: bold; + width: 120px; + display: inline; +} + +span.value { + color: #494; +} + +/* these are for the message boxes */ + +pre.content { + background-color: #eee; + color: #000; + padding: 1em; + margin: 0; + border: 1px solid #aaa; + border-top: 0; + margin-bottom: 1em; + overflow-x: auto; +} + +div.title { + font-family: "lucida console","monaco","andale mono","bitstream vera sans mono","consolas",monospace; + font-size: 12px; + background-color: #aaa; + color: #444; + font-weight: bold; + padding: 3px; + padding-left: 10px; +} + +table.context { + border-spacing: 0; +} + +table.context th, table.context td { + padding: 0; +} + +table.context th { + color: #889; + font-weight: normal; + padding-right: 15px; + text-align: right; +} + +.errline { + color: red; +} + +pre.error { + background: #334; + color: #ccd; + padding: 1em; + border-top: 1px solid #000; + border-left: 1px solid #000; + border-right: 1px solid #eee; + border-bottom: 1px solid #eee; +} + diff --git a/code/step01/Todo/public/css/style.css b/code/step01/Todo/public/css/style.css new file mode 100644 index 0000000..80f94eb --- /dev/null +++ b/code/step01/Todo/public/css/style.css @@ -0,0 +1,189 @@ + +body { +margin: 0; +margin-bottom: 25px; +padding: 0; +background-color: #ddd; +background-image: url("/images/perldancer-bg.jpg"); +background-repeat: no-repeat; +background-position: top left; + +font-family: "Lucida Grande", "Bitstream Vera Sans", "Verdana"; +font-size: 13px; +color: #333; +} + +h1 { +font-size: 28px; +color: #000; +} + +a {color: #03c} +a:hover { +background-color: #03c; +color: white; +text-decoration: none; +} + +#page { +background-color: #ddd; +width: 750px; +margin: auto; +margin-left: auto; +padding-left: 0px; +margin-right: auto; +} + +#content { +background-color: white; +border: 3px solid #aaa; +border-top: none; +padding: 25px; +width: 500px; +} + +#sidebar { +float: right; +width: 175px; +} + +#header, #about, #getting-started { +padding-left: 75px; +padding-right: 30px; +} + + +#header { +background-image: url("/images/perldancer.jpg"); +background-repeat: no-repeat; +background-position: top left; +height: 64px; +} +#header h1, #header h2 {margin: 0} +#header h2 { +color: #888; +font-weight: normal; +font-size: 16px; +} + +#about h3 { +margin: 0; +margin-bottom: 10px; +font-size: 14px; +} + +#about-content { +background-color: #ffd; +border: 1px solid #fc0; +margin-left: -11px; +} +#about-content table { +margin-top: 10px; +margin-bottom: 10px; +font-size: 11px; +border-collapse: collapse; +} +#about-content td { +padding: 10px; +padding-top: 3px; +padding-bottom: 3px; +} +#about-content td.name {color: #555} +#about-content td.value {color: #000} + +#about-content.failure { +background-color: #fcc; +border: 1px solid #f00; +} +#about-content.failure p { +margin: 0; +padding: 10px; +} + +#getting-started { +border-top: 1px solid #ccc; +margin-top: 25px; +padding-top: 15px; +} +#getting-started h1 { +margin: 0; +font-size: 20px; +} +#getting-started h2 { +margin: 0; +font-size: 14px; +font-weight: normal; +color: #333; +margin-bottom: 25px; +} +#getting-started ol { +margin-left: 0; +padding-left: 0; +} +#getting-started li { +font-size: 18px; +color: #888; +margin-bottom: 25px; +} +#getting-started li h2 { +margin: 0; +font-weight: normal; +font-size: 18px; +color: #333; +} +#getting-started li p { +color: #555; +font-size: 13px; +} + +#search { +margin: 0; +padding-top: 10px; +padding-bottom: 10px; +font-size: 11px; +} +#search input { +font-size: 11px; +margin: 2px; +} +#search-text {width: 170px} + +#sidebar ul { +margin-left: 0; +padding-left: 0; +} +#sidebar ul h3 { +margin-top: 25px; +font-size: 16px; +padding-bottom: 10px; +border-bottom: 1px solid #ccc; +} +#sidebar li { +list-style-type: none; +} +#sidebar ul.links li { +margin-bottom: 5px; +} + +h1, h2, h3, h4, h5 { +font-family: sans-serif; +margin: 1.2em 0 0.6em 0; +} + +p { +line-height: 1.5em; +margin: 1.6em 0; +} + +code, .filepath, .app-info { + font-family: 'Andale Mono', Monaco, 'Liberation Mono', 'Bitstream Vera Sans Mono', 'DejaVu Sans Mono', monospace; +} + +#footer { +clear: both; +padding-top: 2em; +text-align: center; +padding-right: 160px; +font-family: sans-serif; +font-size: 10px; +} diff --git a/code/step01/Todo/public/dispatch.cgi b/code/step01/Todo/public/dispatch.cgi new file mode 100755 index 0000000..706ba0c --- /dev/null +++ b/code/step01/Todo/public/dispatch.cgi @@ -0,0 +1,16 @@ +#!/usr/bin/env perl +BEGIN { $ENV{DANCER_APPHANDLER} = 'PSGI';} +use Dancer2; +use FindBin '$RealBin'; +use Plack::Runner; + +# For some reason Apache SetEnv directives don't propagate +# correctly to the dispatchers, so forcing PSGI and env here +# is safer. +set apphandler => 'PSGI'; +set environment => 'production'; + +my $psgi = path($RealBin, '..', 'bin', 'app.psgi'); +die "Unable to read startup script: $psgi" unless -r $psgi; + +Plack::Runner->run($psgi); diff --git a/code/step01/Todo/public/dispatch.fcgi b/code/step01/Todo/public/dispatch.fcgi new file mode 100755 index 0000000..ad42deb --- /dev/null +++ b/code/step01/Todo/public/dispatch.fcgi @@ -0,0 +1,18 @@ +#!/usr/bin/env perl +BEGIN { $ENV{DANCER_APPHANDLER} = 'PSGI';} +use Dancer2; +use FindBin '$RealBin'; +use Plack::Handler::FCGI; + +# For some reason Apache SetEnv directives don't propagate +# correctly to the dispatchers, so forcing PSGI and env here +# is safer. +set apphandler => 'PSGI'; +set environment => 'production'; + +my $psgi = path($RealBin, '..', 'bin', 'app.psgi'); +my $app = do($psgi); +die "Unable to read startup script: $@" if $@; +my $server = Plack::Handler::FCGI->new(nproc => 5, detach => 1); + +$server->run($app); diff --git a/code/step01/Todo/public/favicon.ico b/code/step01/Todo/public/favicon.ico new file mode 100644 index 0000000..96c7465 Binary files /dev/null and b/code/step01/Todo/public/favicon.ico differ diff --git a/code/step01/Todo/public/images/perldancer-bg.jpg b/code/step01/Todo/public/images/perldancer-bg.jpg new file mode 100644 index 0000000..6ee6b77 Binary files /dev/null and b/code/step01/Todo/public/images/perldancer-bg.jpg differ diff --git a/code/step01/Todo/public/images/perldancer.jpg b/code/step01/Todo/public/images/perldancer.jpg new file mode 100644 index 0000000..3f9e718 Binary files /dev/null and b/code/step01/Todo/public/images/perldancer.jpg differ diff --git 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