Sinatra: READMEThis page is also available in. Portuguese (Brazilian). Portuguese (European). Japanese. Sinatra is a DSL for. Ruby with minimal effort: # myapp. Hello world!'end. Install the gem: And run with: View at: http: //localhost: 4. It is recommended to also run gem install thin, which Sinatra will. Routes. In Sinatra, a route is an HTTP method paired with a URL- matching pattern. The first route that. Just Do It: Learn Sinatra. Slim is a fantastic template engine that makes this a much easier task. Before we go on, we need to install the slim gem. Comprehensive documentation for the sinatra (1.1.4) library including guides, examples, and source code, developed for programmers. Clone via HTTPS Clone with Git or checkout with SVN using the repository's web address. We’re also simultaneously releasing sinatra-contrib and would like to officially announce the recently launched Sinatra Recipes project. An easier way to write TwiML templates in Rails and. Twilio project and let me. Route patterns may include named parameters, accessible via the. But other values are. You can return any object that would either be a valid Rack response, Rack. HTTP status code: An Array with three elements: . Template talk:Frank Sinatra. WikiProject Pop music (Rated Template-class). If you would like to participate, please visit the project page. I love Sinatra for writing quick and easy web apps in a snap. I also love MVC for keeping code clear, organized, and easily testable. However, it does not stop there. You. can easily define your own matchers: class. All. But. Pattern. Match = Struct. new(: captures). Match. new(. You can specify. A file. ./public/css/style. Use the : static. These. methods simply return a string: This renders views/index. Instead of a template name, you can also just pass in the template content. Defaults to. settings. Defaults to settings. If it's a. Symbol, specifies what template to use. Example. erb : index, : layout => ! Default depends on template language. Defaults to the application instance. If you. change this, instance variables and helper methods will not be available. Useful for languages that. Defaults to the engine used for the. Example: set : rdoc, : layout. Example. set : rdoc, : layout. To. use a different views directory: set : views, settings. One important thing to remember is that you always have to reference templates. You must use a symbol. Literal Templatesget '/'do. Hello World'end. Renders the template string. Available Template Languages. Some languages have multiple implementations. To specify what implementation. However, it is possible to use another rendering engine for the. You. therefore will usually use it in combination with another rendering engine: erb : overview, : locals => ! However, it is possible to use another rendering engine for the. You. therefore will usually use it in combination with another rendering engine: erb : overview, : locals => ! However, it is possible to use another rendering engine for the. You. therefore will usually use it in combination with another rendering engine: erb : overview, : locals => ! However, it is possible to use another rendering engine for the. You therefore will usually use it in combination with another rendering. However, it is possible to use another rendering engine for the. Layouts written in WLang and yield are supported, though. Accessing Variables in Templates. Templates are evaluated within the same context as route handlers. Instance. variables set in route handlers are directly accessible by templates: get '/: id'do@foo = Foo. Also the general render method accepts a block. Inline Templates. Templates may be defined at the end of the source file: require 'sinatra'. You can individually disable layouts by passing. For instance, if you like to use the file extension. Textile templates, you can do the following: Tilt. Tilt. See https: //github. Tilt. Using Custom Logic for Template Lookup. To implement your own template lookup mechanism you can write your. Instance. variables set in filters are accessible by routes and templates: before do@note = 'Hi!'. Instance variables. Note: Unless you use the body method rather than just returning a String from. Filters optionally take a pattern, causing them to be evaluated only if the. If activated, you have one. This. might not always be what you want (storing lots of data will increase your. You can use any Rack session middleware: in order to. Rack: :Session: :Pool, : expire. A random secret is generated for you by Sinatra. However, since this. If no matching route is found, a 4. Triggering Another Route. Sometimes pass is not what you want, instead you would like to get the result. Simply use call to achieve this: get '/foo'do. However, in some scenarios you might want to. You can do so with the. If you do so, you can use that method from there on to. In extreme examples, you want to keep sending data until. You can use the stream helper to avoid. It can also be. used to increase throughput if some but not all content depends on a slow. Note that the streaming behavior, especially the number of concurrent requests. Some servers. might not even support streaming at all. If the server does not support. Streaming does not work at all with Shotgun. If the optional parameter is set to keep. This only works on evented servers, like Thin and Rainbows. If logging is disabled, this method will return a dummy object, so. Note that logging is only enabled for Sinatra: :Application by default, so if. Sinatra: :Base, you probably want to enable it yourself: class. My. App < Sinatra: :Base. To avoid any logging middleware to be set up, set the logging setting to. However, keep in mind that logger will in that case return nil. A. common use case is when you want to set your own logger. Sinatra will use. If you are looking for a quick reverse- proxy caching. Sinatra assumes resources for safe (like get). You. can change this behavior by passing in a : new. Useful when sending a static file as an error page. If you use this helper method, Sinatra will. It is also able to convert Date. Time, Date and similar classes: get '/'do. Time. now > time. You can. therefore easily extend the behavior of those methods by overriding time. But it is useful that you can actually override this. For instance, if you want to be. This is not a performance. Also. template locations (and content) will be cached if you are not running in. You should keep that in mind if you write a really crazy. Configuration. Run once, at startup, in any environment: configure do# setting one option. You can easily disable. To skip a single defense layer, set protection to an options hash: set : protection, : except => : path. Sometimes you want to set up sessions on your own, though. In. that case you can get it to set up session based protections by passing the. Rack: :Session: :Pool. Available Settingsabsolute. Note that the url helper will still produce absolute URLs, unless you. Only used. for built- in server. Disabled by default. Only used for built- in server. That way redirect '/foo' would behave like. See protection section. Only used if static. Inferred from. app. Enabled in development. Enabled by default when. Do not. enable if using rackup or other means. Do not change this setting! Server or list of servers to use for built- in server. Order indicates. priority, default depends on Ruby implementation. Enabled by. default when environment is set to . Disabled. by default. Environments can be set through the RACK. But note in development it will only run if you set the. One of Rack’s most interesting capabilities. HTTP request/response to provide various types of common functionality. Sinatra makes building Rack middleware pipelines a cinch via a top- level. For example, the use method. Rack: :Auth: :Basicdo . Sinatra uses. many of these components automatically based on configuration so you. You can find useful middleware in. Rack wiki. Testing. Sinatra tests can be written using any Rack- based testing library or framework. The top- level assumes a micro- app style configuration. That’s where. Sinatra: :Base comes into play: require 'sinatra/base'class. My. App < Sinatra: :Base. Hello world!'endend. The methods available to Sinatra: :Base subclasses are exactly the same as. DSL. Most top- level apps can be converted to. Sinatra: :Base components with two modifications: Your file should require sinatra/base instead of sinatra. Sinatra’s DSL methods are imported into the main. Put your app’s routes, error handlers, filters, and options in a subclass. Sinatra: :Base. Sinatra: :Base is a blank slate. Most options are disabled by default. See. Configuring Settings. If you want. behavior more similar to when you define your app at the top level (also. Classic style), you. Sinatra: :Application. My. App < Sinatra: :Application. Hello world!'endend. Modular vs. Classic Style. Contrary to common belief, there is nothing wrong with the classic style. If it. suits your application, you do not have to switch to a modular application. The main disadvantage of using the classic style rather than the modular style. Sinatra application per Ruby process. If you. plan to use more than one, switch to the modular style. There is no reason you. If switching from one style to the other, you should be aware of slightly. Setting. Classic. Modular. Modularapp. This. endpoint could be another Sinatra application, or any other Rack- based. Rails/Ramaze/Camping/. You can do this with Sinatra. At class level you have methods like get or before, but. Options created via set are methods at class level: class. My. App < Sinatra: :Base# Hey, I'm in the application scope! From within this scope you. You can access the application scope from within the request. My. App < Sinatra: :Base# Hey, I'm in the application scope! However, it. does not behave exactly like the class scope, as you do not have the class. Only methods explicitly marked for delegation are available, and you. You can explicitly add method delegations by calling. Sinatra: :Delegator. Sinatra. itself is thread- safe, so there won’t be any problem if the Rack handler. This would mean that when starting. Rack handler. The following example is a demonstration of how. Thin server: # app. App < Sinatra: :Base. Support for 1. 8. Sinatra 2. 0. Ruby 1. Do not use 1. 9. 2p. Sinatra. Official support will continue. Sinatra 1. 5. Please note that switching to 1. Sinatra 2. 0. There are currently no plans to drop. It is recommended to. It is not. recommended to use C extensions with JRuby. It is recommended to. Expect upcoming 2. Sinatra should work on any operating system supported by the chosen Ruby. If you run Mac. Ruby, you should gem install control.
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