[add] add 'contrib/index.cgi' and 'contrib/_htaccess'

2 files changed, 75 insertions, 0 deletions

diff --git a/contrib/_htaccess b/contrib/_htaccess
new file mode 100644
index 0000000..532cbf2
--- /dev/null
+++ b/contrib/_htaccess
@@ -0,0 +1,8 @@
+## enable mod_rewrie
+RewriteEngine on
+## deny access to *.rhtml and *.cache
+RewriteRule \.(rhtml|cache)$ - [R=404,L]
+## rewrite only if requested file is not found
+RewriteCond %{SCRIPT_FILENAME} !-f
+## handle request to *.html by index.cgi
+RewriteRule ^.*\.html$ index.cgi
diff --git a/contrib/index.cgi b/contrib/index.cgi
new file mode 100644
index 0000000..8d8f7a4
--- /dev/null
+++ b/contrib/index.cgi
@@ -0,0 +1,67 @@
+#!/usr/bin/env ruby
+
+###
+### CGI script to handle *.rhtml with Erubis
+###
+### Licsense: same as Erubis
+###
+
+require 'cgi'
+require 'erubis'
+include Erubis::XmlHelper
+
+ERUBY = Erubis::Eruby   # or Erubis::EscapeEruby
+encoding = 'utf-8'
+
+## helper class to represent http error
+class HttpError < Exception
+  attr_accessor :status
+  def initialize(status, message)
+    super(message)
+    @status = status
+  end
+end
+
+
+## main
+cgi = CGI.new
+content_type = "text/html; charset=#{encoding}"
+begin
+
+  ## check environment variables
+  document_root = ENV['DOCUMENT_ROOT']  or raise "ENV['DOCUMENT_ROOT'] is not set."
+  request_uri   = ENV['REQUEST_URI']    or raise "ENV['REQUEST_URI'] is not set."
+  ## get filepath
+  basepath = request_uri.split(/\?/, 2).first
+  filepath = File.join(document_root, basepath)
+  filepath.gsub!(/\.html\z/, '.rhtml')  or  # expected '*.html'
+    raise HttpError.new('500 Internal Error', 'invalid .htaccess configuration.')
+  File.file?(filepath)  or                  # file not found
+    raise HttpError.new('404 Not Found', "#{basepath}: not found.")
+  basepath != ENV['SCRIPT_NAME']  or        # can't access to index.cgi
+    raise HttpError.new('403 Forbidden', "#{basepath}: not accessable.")
+  ## process as eRuby file
+  eruby = ERUBY.load_file(filepath)         # or ERUBY.new(File.read(filepath))
+  html  = eruby.result()
+  ## send response
+  print cgi.header('Content-Type'=>content_type, 'Content-Length'=>html.length)
+  print html
+
+rescue HttpError => ex
+  ## handle http error (such as 404 Not Found)
+  print cgi.header('Content-Type'=>content_type, 'Status'=>ex.status)
+  print "<h2>#{h(ex.status)}</h2>\n"
+  print "<p>#{h(ex.message)}</p>"
+
+rescue Exception => ex
+  ## print exception backtrace
+  print cgi.header('Content-Type'=>content_type, 'Status'=>'500 Internal Error')
+  arr = ex.backtrace
+  print   "<pre>\n"
+  print   "<b>#{h(arr[0])}: #{h(ex.message)} (#{h(ex.class.name)})</b>\n"
+  arr[1..-1].each do |item|
+    print "        from #{h(item)}\n"
+  end
+  print   "</pre>\n"
+
+end