Class: Merb::Rack::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/merb-core/rack/application.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Application

Parameters

options<Hash>

Options for creating a new application. Currently ignored.



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# File 'lib/merb-core/rack/application.rb', line 9

def initialize(options={})
  @static_server = ::Rack::File.new Merb.dir_for(:public)
  if prefix = ::Merb::Config[:path_prefix]
    @path_prefix = /^#{Regexp.escape(prefix)}/
  end
end

Instance Method Details

#call(env) ⇒ Object

Parameters

env<Hash>

Environment variables to pass on to the application.

Returns

Array

A 3 element tuple consisting of response status, headers and body.



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# File 'lib/merb-core/rack/application.rb', line 22

def call(env) 
  strip_path_prefix(env) if @path_prefix  # Strip out the path_prefix if one was set 
  path = env['PATH_INFO'] ? env['PATH_INFO'].chomp('/') : ""
  cached_path = (path.empty? ? 'index' : path) + '.html'
  Merb.logger.info "Request: #{path}"
  if file_exist?(path) && env['REQUEST_METHOD'] =~ /GET|HEAD/ # Serve the file if it's there and the request method is GET or HEAD
    serve_static(env)
  elsif file_exist?(cached_path) && env['REQUEST_METHOD'] =~ /GET|HEAD/ # Serve the page cache if it's there and the request method is GET or HEAD
    env['PATH_INFO'] = cached_path
    serve_static(env)
  else                              # No static file, let Merb handle it
    if path =~ /favicon\.ico/
      return [404, {"Content-Type"=>"text/html"}, "404 Not Found."]
    end  
    begin
      controller = ::Merb::Dispatcher.handle(env)
    rescue Object => e
      return [500, {"Content-Type"=>"text/html"}, e.message + "<br/>" + e.backtrace.join("<br/>")]
    end
    Merb.logger.info "\n\n"
    Merb.logger.flush
    [controller.status, controller.headers, controller.body]
  end
end

#file_exist?(path) ⇒ Boolean

Parameters

path<String>

The path to the file relative to the server root.

Returns

Boolean

True if file exists under the server root and is readable.

Returns:

  • (Boolean) 


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# File 'lib/merb-core/rack/application.rb', line 52

def file_exist?(path)
  full_path = ::File.join(@static_server.root, ::Merb::Request.unescape(path))
  ::File.file?(full_path) && ::File.readable?(full_path)
end

#serve_static(env) ⇒ Object

Parameters

env<Hash>

Environment variables to pass on to the server.



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# File 'lib/merb-core/rack/application.rb', line 59

def serve_static(env)
  env["PATH_INFO"] = ::Merb::Request.unescape(env["PATH_INFO"])        
  @static_server.call(env)
end

#strip_path_prefix(env) ⇒ Object

Parameters

env<Hash>

Environment variables to pass on to the server.



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# File 'lib/merb-core/rack/application.rb', line 66

def strip_path_prefix(env)
  ['PATH_INFO', 'REQUEST_URI'].each do |path_key|
    if env[path_key] =~ @path_prefix
      env[path_key].sub!(@path_prefix, '')
      env[path_key] = '/' if env[path_key].empty?
    end
  end
end