Class: Rack::URLMap
- Inherits:
-
Object
- Object
- Rack::URLMap
- Defined in:
- rack/rack/urlmap.rb
Overview
Rack::URLMap takes a hash mapping urls or paths to apps, and dispatches
accordingly. Support for HTTP/1.1 host names exists if the URLs start with
http://
or https://
.
URLMap modifies the SCRIPT_NAME and PATH_INFO such that the part relevant for dispatch is in the SCRIPT_NAME, and the rest in the PATH_INFO. This should be taken care of when you need to reconstruct the URL in order to create links.
URLMap dispatches in such a way that the longest paths are tried first, since they are most specific.
Constant Summary
- NEGATIVE_INFINITY =
-1.0 / 0.0
- INFINITY =
1.0 / 0.0
Instance Method Summary (collapse)
- - (void) call(env)
-
- (URLMap) initialize(map = {})
constructor
A new instance of URLMap.
- - (void) remap(map)
Constructor Details
- (URLMap) initialize(map = {})
Returns a new instance of URLMap
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# File 'rack/rack/urlmap.rb', line 18 def initialize(map = {}) remap(map) end |
Instance Method Details
- (void) call(env)
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# File 'rack/rack/urlmap.rb', line 43 def call(env) path = env["PATH_INFO"] script_name = env['SCRIPT_NAME'] hHost = env['HTTP_HOST'] sName = env['SERVER_NAME'] sPort = env['SERVER_PORT'] @mapping.each do |host, location, match, app| unless hHost == host \ || sName == host \ || (!host && (hHost == sName || hHost == sName+':'+sPort)) next end next unless m = match.match(path.to_s) rest = m[1] next unless !rest || rest.empty? || rest[0] == ?/ env['SCRIPT_NAME'] = (script_name + location) env['PATH_INFO'] = rest return app.call(env) end [404, {"Content-Type" => "text/plain", "X-Cascade" => "pass"}, ["Not Found: #{path}"]] ensure env['PATH_INFO'] = path env['SCRIPT_NAME'] = script_name end |
- (void) remap(map)
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# File 'rack/rack/urlmap.rb', line 22 def remap(map) @mapping = map.map { |location, app| if location =~ %r{\Ahttps?://(.*?)(/.*)} host, location = $1, $2 else host = nil end unless location[0] == ?/ raise ArgumentError, "paths need to start with /" end location = location.chomp('/') match = Regexp.new("^#{Regexp.quote(location).gsub('/', '/+')}(.*)", nil, 'n') [host, location, match, app] }.sort_by do |(host, location, _, _)| [host ? -host.size : INFINITY, -location.size] end end |