More robust relative url root discovery for SCGI compatibility. This solves the 'SCGI routes problem' -- you no longer need to prefix all your routes with the name of the SCGI mountpoint. References #3070.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3237 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* More robust relative url root discovery for SCGI compatibility.  This solves the 'SCGI routes problem' -- you no longer need to prefix all your routes with the name of the SCGI mountpoint.  #3070 [Dave Ringoen]
+
 * Fix docs for text_area_tag. #3083. [Christopher Cotton]
 
 * Change form_for and fields_for method signatures to take object name and object as separate arguments rather than as a Hash. [DHH]

actionpack/lib/action_controller/request.rb

@@ -169,7 +169,8 @@ module ActionController
     # Returns the path minus the web server relative installation directory.
     # This method returns nil unless the web server is apache.
     def relative_url_root
-      @@relative_url_root ||= server_software == 'apache' ? File.dirname(env["SCRIPT_NAME"].to_s).gsub(/(^\.$|^\/$)/, '') : ''
+      @@relative_url_root ||= server_software == 'apache' ? env["SCRIPT_NAME"].to_s.sub(/\/dispatch\.(fcgi|rb|cgi)$/, '') : ''
+      
     end
 
     # Returns the port number of this request as an integer.

actionpack/test/controller/request_test.rb

@@ -100,6 +100,11 @@ class RequestTest < Test::Unit::TestCase
     @request.relative_url_root = nil
     @request.env['SCRIPT_NAME'] = "/collaboration/hieraki/dispatch.cgi"
     assert_equal "/collaboration/hieraki", @request.relative_url_root    
+    
+    # apache/scgi case
+    @request.relative_url_root = nil
+    @request.env['SCRIPT_NAME'] = "/collaboration/hieraki"
+    assert_equal "/collaboration/hieraki", @request.relative_url_root    
   end
   
   def test_request_uri