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<div class='toc'>
<ol class='level-1'>
<li><a href='#Routes'>Routes</a></li>
<ol class='level-2'>
<li><a href='#Conditions'>Conditions</a></li>
<li><a href='#Return%20Values'>Return Values</a></li>
<li><a href='#Custom%20Route%20Matchers'>Custom Route Matchers</a></li>
</ol>
<li><a href='#Static%20Files'>Static Files</a></li>
<li><a href='#Views%20/%20Templates'>Views / Templates</a></li>
<ol class='level-2'>
<li><a href='#Haml%20Templates'>Haml Templates</a></li>
<li><a href='#Erb%20Templates'>Erb Templates</a></li>
<li><a href='#Erubis%20Templates'>Erubis Templates</a></li>
<li><a href='#Builder%20Templates'>Builder Templates</a></li>
<li><a href='#Nokogiri%20Templates'>Nokogiri Templates</a></li>
<li><a href='#Sass%20Templates'>Sass Templates</a></li>
<li><a href='#Scss%20Templates'>Scss Templates</a></li>
<li><a href='#Less%20Templates'>Less Templates</a></li>
<li><a href='#Liquid%20Templates'>Liquid Templates</a></li>
<li><a href='#Markdown%20Templates'>Markdown Templates</a></li>
<li><a href='#Textile%20Templates'>Textile Templates</a></li>
<li><a href='#RDoc%20Templates'>RDoc Templates</a></li>
<li><a href='#Radius%20Templates'>Radius Templates</a></li>
<li><a href='#Markaby%20Templates'>Markaby Templates</a></li>
<li><a href='#Slim%20Templates'>Slim Templates</a></li>
<li><a href='#CoffeeScript%20Templates'>CoffeeScript Templates</a></li>
<li><a href='#Embedded%20Templates'>Embedded Templates</a></li>
<li><a href='#Accessing%20Variables%20in%20Templates'>Accessing Variables in Templates</a></li>
<li><a href='#Inline%20Templates'>Inline Templates</a></li>
<li><a href='#Named%20Templates'>Named Templates</a></li>
<li><a href='#Associating%20File%20Extensions'>Associating File Extensions</a></li>
<li><a href='#Adding%20Your%20Own%20Template%20Engine'>Adding Your Own Template Engine</a></li>
</ol>
<li><a href='#Filters'>Filters</a></li>
<li><a href='#Helpers'>Helpers</a></li>
<ol class='level-2'>
<li><a href='#Using%20Sessions'>Using Sessions</a></li>
<li><a href='#Halting'>Halting</a></li>
<li><a href='#Passing'>Passing</a></li>
<li><a href='#Triggering%20Another%20Route'>Triggering Another Route</a></li>
<li><a href='#Setting%20Body,%20Status%20Code%20and%20Headers'>Setting Body, Status Code and Headers</a></li>
<li><a href='#Mime%20Types'>Mime Types</a></li>
<li><a href='#Generating%20URLs'>Generating URLs</a></li>
<li><a href='#Browser%20Redirect'>Browser Redirect</a></li>
<li><a href='#Cache%20Control'>Cache Control</a></li>
<li><a href='#Sending%20Files'>Sending Files</a></li>
<li><a href='#Accessing%20the%20Request%20Object'>Accessing the Request Object</a></li>
<li><a href='#Attachments'>Attachments</a></li>
<li><a href='#Looking%20Up%20Template%20Files'>Looking Up Template Files</a></li>
</ol>
<li><a href='#Configuration'>Configuration</a></li>
<ol class='level-2'>
<li><a href='#Available%20Settings'>Available Settings</a></li>
</ol>
<li><a href='#Error%20Handling'>Error Handling</a></li>
<ol class='level-2'>
<li><a href='#Not%20Found'>Not Found</a></li>
<li><a href='#Error'>Error</a></li>
</ol>
<li><a href='#Rack%20Middleware'>Rack Middleware</a></li>
<li><a href='#Testing'>Testing</a></li>
<li><a href='#Sinatra::Base%20-%20Middleware,%20Libraries,%20and%20Modular%20Apps'>Sinatra::Base - Middleware, Libraries, and Modular Apps</a></li>
<ol class='level-2'>
<li><a href='#Modular%20vs.%20Classic%20Style'>Modular vs. Classic Style</a></li>
<li><a href='#Serving%20a%20Modular%20Application'>Serving a Modular Application</a></li>
<li><a href='#Using%20a%20Classic%20Style%20Application%20with%20a%20config.ru'>Using a Classic Style Application with a config.ru</a></li>
<li><a href='#When%20to%20use%20a%20config.ru?'>When to use a config.ru?</a></li>
<li><a href='#Using%20Sinatra%20as%20Middleware'>Using Sinatra as Middleware</a></li>
<li><a href='#Dynamic%20Application%20Creation'>Dynamic Application Creation</a></li>
</ol>
<li><a href='#Scopes%20and%20Binding'>Scopes and Binding</a></li>
<ol class='level-2'>
<li><a href='#Application/Class%20Scope'>Application/Class Scope</a></li>
<li><a href='#Request/Instance%20Scope'>Request/Instance Scope</a></li>
<li><a href='#Delegation%20Scope'>Delegation Scope</a></li>
</ol>
<li><a href='#Command%20Line'>Command Line</a></li>
<li><a href='#Requirements'>Requirements</a></li>
<li><a href='#The%20Bleeding%20Edge'>The Bleeding Edge</a></li>
<ol class='level-2'>
<li><a href='#With%20Bundler'>With Bundler</a></li>
<li><a href='#Roll%20Your%20Own'>Roll Your Own</a></li>
<li><a href='#Install%20Globally'>Install Globally</a></li>
</ol>
<li><a href='#Versioning'>Versioning</a></li>
<li><a href='#Further%20Reading'>Further Reading</a></li>
</ol>
</div>
<p>
Sinatra is a DSL for quickly creating web applications in Ruby with minimal
effort:
</p>
<pre>
# myapp.rb
require 'sinatra'
get '/' do
'Hello world!'
end
</pre>
<p>
Install the gem and run with:
</p>
<pre>
gem install sinatra
ruby -rubygems myapp.rb
</pre>
<p>
View at: <a href="http://localhost:4567">localhost:4567</a>
</p>
<p>
It is recommended to also run <tt>gem install thin</tt>, which Sinatra will
pick up if available.
</p>
<a name='Routes'></a>
<h2>Routes</h2>
<p>
In Sinatra, a route is an HTTP method paired with a URL-matching pattern.
Each route is associated with a block:
</p>
<pre>
get '/' do
.. show something ..
end
post '/' do
.. create something ..
end
put '/' do
.. update something ..
end
delete '/' do
.. annihilate something ..
end
options '/' do
.. appease something ..
end
</pre>
<p>
Routes are matched in the order they are defined. The first route that
matches the request is invoked.
</p>
<p>
Route patterns may include named parameters, accessible via the
<tt>params</tt> hash:
</p>
<pre>
get '/hello/:name' do
# matches "GET /hello/foo" and "GET /hello/bar"
# params[:name] is 'foo' or 'bar'
"Hello #{params[:name]}!"
end
</pre>
<p>
You can also access named parameters via block parameters:
</p>
<pre>
get '/hello/:name' do |n|
"Hello #{n}!"
end
</pre>
<p>
Route patterns may also include splat (or wildcard) parameters, accessible
via the <tt>params[:splat]</tt> array:
</p>
<pre>
get '/say/*/to/*' do
# matches /say/hello/to/world
params[:splat] # => ["hello", "world"]
end
get '/download/*.*' do
# matches /download/path/to/file.xml
params[:splat] # => ["path/to/file", "xml"]
end
</pre>
<p>
Or with block parameters:
</p>
<pre>
get '/download/*.*' do |path, ext|
[path, ext] # => ["path/to/file", "xml"]
end
</pre>
<p>
Route matching with Regular Expressions:
</p>
<pre>
get %r{/hello/([\w]+)} do
"Hello, #{params[:captures].first}!"
end
</pre>
<p>
Or with a block parameter:
</p>
<pre>
get %r{/hello/([\w]+)} do |c|
"Hello, #{c}!"
end
</pre>
<a name='Conditions'></a>
<h3>Conditions</h3>
<p>
Routes may include a variety of matching conditions, such as the user
agent:
</p>
<pre>
get '/foo', :agent => /Songbird (\d\.\d)[\d\/]*?/ do
"You're using Songbird version #{params[:agent][0]}"
end
get '/foo' do
# Matches non-songbird browsers
end
</pre>
<p>
Other available conditions are <tt>host_name</tt> and <tt>provides</tt>:
</p>
<pre>
get '/', :host_name => /^admin\./ do
"Admin Area, Access denied!"
end
get '/', :provides => 'html' do
haml :index
end
get '/', :provides => ['rss', 'atom', 'xml'] do
builder :feed
end
</pre>
<p>
You can easily define your own conditions:
</p>
<pre>
set(:probability) { |value| condition { rand <= value } }
get '/win_a_car', :probability => 0.1 do
"You won!"
end
get '/win_a_car' do
"Sorry, you lost."
end
</pre>
<a name='Return%20Values'></a>
<h3>Return Values</h3>
<p>
The return value of a route block determines at least the response body
passed on to the HTTP client, or at least the next middleware in the Rack
stack. Most commonly, this is a string, as in the above examples. But other
values are also accepted.
</p>
<p>
You can return any object that would either be a valid Rack response, Rack
body object or HTTP status code:
</p>
<ul>
<li><p>
An Array with three elements: <tt>[status (Fixnum), headers (Hash),
response body (responds to #each)]</tt>
</p>
</li>
<li><p>
An Array with two elements: <tt>[status (Fixnum), response body (responds
to #each)]</tt>
</p>
</li>
<li><p>
An object that responds to <tt>#each</tt> and passes nothing but strings to
the given block
</p>
</li>
<li><p>
A Fixnum representing the status code
</p>
</li>
</ul>
<p>
That way we can, for instance, easily implement a streaming example:
</p>
<pre>
class Stream
def each
100.times { |i| yield "#{i}\n" }
end
end
get('/') { Stream.new }
</pre>
<a name='Custom%20Route%20Matchers'></a>
<h3>Custom Route Matchers</h3>
<p>
As shown above, Sinatra ships with built-in support for using String
patterns and regular expressions as route matches. However, it does not
stop there. You can easily define your own matchers:
</p>
<pre>
class AllButPattern
Match = Struct.new(:captures)
def initialize(except)
@except = except
@captures = Match.new([])
end
def match(str)
@captures unless @except === str
end
end
def all_but(pattern)
AllButPattern.new(pattern)
end
get all_but("/index") do
# ...
end
</pre>
<p>
Note that the above example might be over-engineered, as it can also be
expressed as:
</p>
<pre>
get // do
pass if request.path_info == "/index"
# ...
end
</pre>
<p>
Or, using negative look ahead:
</p>
<pre>
get %r{^(?!/index$)} do
# ...
end
</pre>
<a name='Static%20Files'></a>
<h2>Static Files</h2>
<p>
Static files are served from the <tt>./public</tt> directory. You can
specify a different location by setting the <tt>:public</tt> option:
</p>
<pre>
set :public, File.dirname(__FILE__) + '/static'
</pre>
<p>
Note that the public directory name is not included in the URL. A file
<tt>./public/css/style.css</tt> is made available as <tt><a
href="http://example.com/css/style.css">example.com/css/style.css</a></tt>.
</p>
<a name='Views%20/%20Templates'></a>
<h2>Views / Templates</h2>
<p>
Templates are assumed to be located directly under the <tt>./views</tt>
directory. To use a different views directory:
</p>
<pre>
set :views, File.dirname(__FILE__) + '/templates'
</pre>
<p>
One important thing to remember is that you always have to reference
templates with symbols, even if they’re in a subdirectory (in this
case, use <tt>:'subdir/template'</tt>). You must use a symbol because
otherwise rendering methods will render any strings passed to them
directly.
</p>
<a name='Haml%20Templates'></a>
<h3>Haml Templates</h3>
<p>
The <tt>haml</tt> gem/library is required to render HAML templates:
</p>
<pre>
# You'll need to require haml in your app
require 'haml'
get '/' do
haml :index
end
</pre>
<p>
Renders <tt>./views/index.haml</tt>.
</p>
<p>
<a
href="http://haml-lang.com/docs/yardoc/file.HAML_REFERENCE.html#options">Haml's
options</a> can be set globally through Sinatra’s configurations, see
<a href="http://www.sinatrarb.com/configuration.html">Options and
Configurations</a>, and overridden on an individual basis.
</p>
<pre>
set :haml, :format => :html5 # default Haml format is :xhtml
get '/' do
haml :index, :format => :html4 # overridden
end
</pre>
<a name='Erb%20Templates'></a>
<h3>Erb Templates</h3>
<pre>
# You'll need to require erb in your app
require 'erb'
get '/' do
erb :index
end
</pre>
<p>
Renders <tt>./views/index.erb</tt>.
</p>
<a name='Erubis%20Templates'></a>
<h3>Erubis Templates</h3>
<p>
The <tt>erubis</tt> gem/library is required to render Erubis templates:
</p>
<pre>
# You'll need to require erubis in your app
require 'erubis'
get '/' do
erubis :index
end
</pre>
<p>
Renders <tt>./views/index.erubis</tt>.
</p>
<p>
It is also possible to replace Erb with Erubis:
</p>
<pre>
require 'erubis'
Tilt.register :erb, Tilt[:erubis]
get '/' do
erb :index
end
</pre>
<p>
Renders <tt>./views/index.erb</tt> with Erubis.
</p>
<a name='Builder%20Templates'></a>
<h3>Builder Templates</h3>
<p>
The <tt>builder</tt> gem/library is required to render builder templates:
</p>
<pre>
# You'll need to require builder in your app
require 'builder'
get '/' do
builder :index
end
</pre>
<p>
Renders <tt>./views/index.builder</tt>.
</p>
<a name='Nokogiri%20Templates'></a>
<h3>Nokogiri Templates</h3>
<p>
The <tt>nokogiri</tt> gem/library is required to render nokogiri templates:
</p>
<pre>
# You'll need to require nokogiri in your app
require 'nokogiri'
get '/' do
nokogiri :index
end
</pre>
<p>
Renders <tt>./views/index.nokogiri</tt>.
</p>
<a name='Sass%20Templates'></a>
<h3>Sass Templates</h3>
<p>
The <tt>haml</tt> or <tt>sass</tt> gem/library is required to render Sass
templates:
</p>
<pre>
# You'll need to require haml or sass in your app
require 'sass'
get '/stylesheet.css' do
sass :stylesheet
end
</pre>
<p>
Renders <tt>./views/stylesheet.sass</tt>.
</p>
<p>
<a
href="http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#options">Sass's
options</a> can be set globally through Sinatra’s configurations, see
<a href="http://www.sinatrarb.com/configuration.html">Options and
Configurations</a>, and overridden on an individual basis.
</p>
<pre>
set :sass, :style => :compact # default Sass style is :nested
get '/stylesheet.css' do
sass :stylesheet, :style => :expanded # overridden
end
</pre>
<a name='Scss%20Templates'></a>
<h3>Scss Templates</h3>
<p>
The <tt>haml</tt> or <tt>sass</tt> gem/library is required to render Scss
templates:
</p>
<pre>
# You'll need to require haml or sass in your app
require 'sass'
get '/stylesheet.css' do
scss :stylesheet
end
</pre>
<p>
Renders <tt>./views/stylesheet.scss</tt>.
</p>
<p>
<a
href="http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#options">Scss's
options</a> can be set globally through Sinatra’s configurations, see
<a href="http://www.sinatrarb.com/configuration.html">Options and
Configurations</a>, and overridden on an individual basis.
</p>
<pre>
set :scss, :style => :compact # default Scss style is :nested
get '/stylesheet.css' do
scss :stylesheet, :style => :expanded # overridden
end
</pre>
<a name='Less%20Templates'></a>
<h3>Less Templates</h3>
<p>
The <tt>less</tt> gem/library is required to render Less templates:
</p>
<pre>
# You'll need to require less in your app
require 'less'
get '/stylesheet.css' do
less :stylesheet
end
</pre>
<p>
Renders <tt>./views/stylesheet.less</tt>.
</p>
<a name='Liquid%20Templates'></a>
<h3>Liquid Templates</h3>
<p>
The <tt>liquid</tt> gem/library is required to render Liquid templates:
</p>
<pre>
# You'll need to require liquid in your app
require 'liquid'
get '/' do
liquid :index
end
</pre>
<p>
Renders <tt>./views/index.liquid</tt>.
</p>
<p>
Since you cannot call Ruby methods (except for <tt>yield</tt>) from a
Liquid template, you almost always want to pass locals to it:
</p>
<pre>
liquid :index, :locals => { :key => 'value' }
</pre>
<a name='Markdown%20Templates'></a>
<h3>Markdown Templates</h3>
<p>
The <tt>rdiscount</tt> gem/library is required to render Markdown
templates:
</p>
<pre>
# You'll need to require rdiscount in your app
require "rdiscount"
get '/' do
markdown :index
end
</pre>
<p>
Renders <tt>./views/index.markdown</tt> (<tt>md</tt> and <tt>mkd</tt> are
also valid file extensions).
</p>
<p>
It is not possible to call methods from markdown, nor to pass locals to it.
You therefore will usually use it in combination with another rendering
engine:
</p>
<pre>
erb :overview, :locals => { :text => markdown(:introduction) }
</pre>
<p>
Note that you may also call the <tt>markdown</tt> method from within other
templates:
</p>
<pre>
%h1 Hello From Haml!
%p= markdown(:greetings)
</pre>
<p>
Since you cannot call Ruby from Markdown, you cannot use layouts written in
Markdown. However, it is possible to use another rendering engine for the
template than for the layout by passing the <tt>:layout_engine</tt> option:
</p>
<pre>
get '/' do
markdown :index, :layout_engine => :erb
end
</pre>
<p>
This will render <tt>./views/index.md</tt> with <tt>./views/layout.erb</tt>
as layout.
</p>
<p>
Remember that you can set such rendering options globally:
</p>
<pre>
set :markdown, :layout_engine => :haml, :layout => :post
get '/' do
markdown :index
end
</pre>
<p>
This will render <tt>./views/index.md</tt> (and any other Markdown
template) with <tt>./views/post.haml</tt> as layout.
</p>
<p>
It is also possible to parse Markdown with BlueCloth rather than RDiscount:
</p>
<pre>
require 'bluecloth'
Tilt.register 'markdown', BlueClothTemplate
Tilt.register 'mkd', BlueClothTemplate
Tilt.register 'md', BlueClothTemplate
get '/' do
markdown :index
end
</pre>
<p>
Renders <tt>./views/index.md</tt> with BlueCloth.
</p>
<a name='Textile%20Templates'></a>
<h3>Textile Templates</h3>
<p>
The <tt>RedCloth</tt> gem/library is required to render Textile templates:
</p>
<pre>
# You'll need to require redcloth in your app
require "redcloth"
get '/' do
textile :index
end
</pre>
<p>
Renders <tt>./views/index.textile</tt>.
</p>
<p>
It is not possible to call methods from textile, nor to pass locals to it.
You therefore will usually use it in combination with another rendering
engine:
</p>
<pre>
erb :overview, :locals => { :text => textile(:introduction) }
</pre>
<p>
Note that you may also call the <tt>textile</tt> method from within other
templates:
</p>
<pre>
%h1 Hello From Haml!
%p= textile(:greetings)
</pre>
<p>
Since you cannot call Ruby from Textile, you cannot use layouts written in
Textile. However, it is possible to use another rendering engine for the
template than for the layout by passing the <tt>:layout_engine</tt> option:
</p>
<pre>
get '/' do
textile :index, :layout_engine => :erb
end
</pre>
<p>
This will render <tt>./views/index.textile</tt> with
<tt>./views/layout.erb</tt> as layout.
</p>
<p>
Remember that you can set such rendering options globally:
</p>
<pre>
set :textile, :layout_engine => :haml, :layout => :post
get '/' do
textile :index
end
</pre>
<p>
This will render <tt>./views/index.textile</tt> (and any other Textile
template) with <tt>./views/post.haml</tt> as layout.
</p>
<a name='RDoc%20Templates'></a>
<h3>RDoc Templates</h3>
<p>
The <tt>rdoc</tt> gem/library is required to render RDoc templates:
</p>
<pre>
# You'll need to require rdoc/markup/to_html in your app
require "rdoc/markup/to_html"
get '/' do
rdoc :index
end
</pre>
<p>
Renders <tt>./views/index.rdoc</tt>.
</p>
<p>
It is not possible to call methods from rdoc, nor to pass locals to it. You
therefore will usually use it in combination with another rendering engine:
</p>
<pre>
erb :overview, :locals => { :text => rdoc(:introduction) }
</pre>
<p>
Note that you may also call the <tt>rdoc</tt> method from within other
templates:
</p>
<pre>
%h1 Hello From Haml!
%p= rdoc(:greetings)
</pre>
<p>
Since you cannot call Ruby from RDoc, you cannot use layouts written in
RDoc. However, it is possible to use another rendering engine for the
template than for the layout by passing the <tt>:layout_engine</tt> option:
</p>
<pre>
get '/' do
rdoc :index, :layout_engine => :erb
end
</pre>
<p>
This will render <tt>./views/index.rdoc</tt> with
<tt>./views/layout.erb</tt> as layout.
</p>
<p>
Remember that you can set such rendering options globally:
</p>
<pre>
set :rdoc, :layout_engine => :haml, :layout => :post
get '/' do
rdoc :index
end
</pre>
<p>
This will render <tt>./views/index.rdoc</tt> (and any other RDoc template)
with <tt>./views/post.haml</tt> as layout.
</p>
<a name='Radius%20Templates'></a>
<h3>Radius Templates</h3>
<p>
The <tt>radius</tt> gem/library is required to render Radius templates:
</p>
<pre>
# You'll need to require radius in your app
require 'radius'
get '/' do
radius :index
end
</pre>
<p>
Renders <tt>./views/index.radius</tt>.
</p>
<p>
Since you cannot call Ruby methods (except for <tt>yield</tt>) from a
Radius template, you almost always want to pass locals to it:
</p>
<pre>
radius :index, :locals => { :key => 'value' }
</pre>
<a name='Markaby%20Templates'></a>
<h3>Markaby Templates</h3>
<p>
The <tt>markaby</tt> gem/library is required to render Markaby templates:
</p>
<pre>
# You'll need to require markaby in your app
require 'markaby'
get '/' do
markaby :index
end
</pre>
<p>
Renders <tt>./views/index.mab</tt>.
</p>
<p>
You may also use inline Markaby:
</p>
<pre>
get '/' do
markaby { h1 "Welcome!" }
end
</pre>
<a name='Slim%20Templates'></a>
<h3>Slim Templates</h3>
<p>
The <tt>slim</tt> gem/library is required to render Slim templates:
</p>
<pre>
# You'll need to require slim in your app
require 'slim'
get '/' do
slim :index
end
</pre>
<p>
Renders <tt>./views/index.slim</tt>.
</p>
<a name='CoffeeScript%20Templates'></a>
<h3>CoffeeScript Templates</h3>
<p>
The <tt>coffee-script</tt> gem/library and at least <b>one</b> of the
following options to execute JavaScript:
</p>
<ul>
<li><p>
<tt>node</tt> (from Node.js) in your path
</p>
</li>
<li><p>
you must be running on OSX
</p>
</li>
<li><p>
<tt>therubyracer</tt> gem/library
</p>
</li>
</ul>
<p>
See <a
href="http://github.com/josh/ruby-coffee-script">github.com/josh/ruby-coffee-script</a>
for an updated list of options.
</p>
<p>
Now you can render CoffeeScript templates:
</p>
<pre>
# You'll need to require coffee-script in your app
require 'coffee-script'
get '/application.js' do
coffee :application
end
</pre>
<p>
Renders <tt>./views/application.coffee</tt>.
</p>
<a name='Embedded%20Templates'></a>
<h3>Embedded Templates</h3>
<pre>
get '/' do
haml '%div.title Hello World'
end
</pre>
<p>
Renders the embedded template string.
</p>
<a name='Accessing%20Variables%20in%20Templates'></a>
<h3>Accessing Variables in Templates</h3>
<p>
Templates are evaluated within the same context as route handlers. Instance
variables set in route handlers are directly accessible by templates:
</p>
<pre>
get '/:id' do
@foo = Foo.find(params[:id])
haml '%h1= @foo.name'
end
</pre>
<p>
Or, specify an explicit Hash of local variables:
</p>
<pre>
get '/:id' do
foo = Foo.find(params[:id])
haml '%h1= bar.name', :locals => { :bar => foo }
end
</pre>
<p>
This is typically used when rendering templates as partials from within
other templates.
</p>
<a name='Inline%20Templates'></a>
<h3>Inline Templates</h3>
<p>
Templates may be defined at the end of the source file:
</p>
<pre>
require 'sinatra'
get '/' do
haml :index
end
__END__
@@ layout
%html
= yield
@@ index
%div.title Hello world!!!!!
</pre>
<p>
NOTE: Inline templates defined in the source file that requires sinatra are
automatically loaded. Call <tt>enable :inline_templates</tt> explicitly if
you have inline templates in other source files.
</p>
<a name='Named%20Templates'></a>
<h3>Named Templates</h3>
<p>
Templates may also be defined using the top-level <tt>template</tt> method:
</p>
<pre>
template :layout do
"%html\n =yield\n"
end
template :index do
'%div.title Hello World!'
end
get '/' do
haml :index
end
</pre>
<p>
If a template named “layout” exists, it will be used each time
a template is rendered. You can individually disable layouts by passing
<tt>:layout => false</tt> or disable them by default via <tt>set :haml,
:layout => false</tt>:
</p>
<pre>
get '/' do
haml :index, :layout => !request.xhr?
end
</pre>
<a name='Associating%20File%20Extensions'></a>
<h3>Associating File Extensions</h3>
<p>
To associate a file extension with a template engine, use
<tt>Tilt.register</tt>. For instance, if you like to use the file extension
<tt>tt</tt> for Textile templates, you can do the following:
</p>
<pre>
Tilt.register :tt, Tilt[:textile]
</pre>
<a name='Adding%20Your%20Own%20Template%20Engine'></a>
<h3>Adding Your Own Template Engine</h3>
<p>
First, register your engine with Tilt, then create a rendering method:
</p>
<pre>
Tilt.register :myat, MyAwesomeTemplateEngine
helpers do
def myat(*args) render(:myat, *args) end
end
get '/' do
myat :index
end
</pre>
<p>
Renders <tt>./views/index.myat</tt>. See <a
href="https://github.com/rtomayko/tilt">github.com/rtomayko/tilt</a> to
learn more about Tilt.
</p>
<a name='Filters'></a>