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#
# erbhandler.rb -- ERBHandler Class
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou
# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: erbhandler.rb,v 1.25 2003/02/24 19:25:31 gotoyuzo Exp $
require 'webrick/httpservlet/abstract.rb'
require 'erb'
module WEBrick
module HTTPServlet
##
# ERBHandler evaluates an ERB file and returns the result. This handler
# is automatically used if there are .rhtml files in a directory served by
# the FileHandler.
#
# ERBHandler supports GET and POST methods.
#
# The ERB file is evaluated with the local variables +servlet_request+ and
# +servlet_response+ which are a WEBrick::HTTPRequest and
# WEBrick::HTTPResponse respectively.
#
# Example .rhtml file:
#
# Request to <%= servlet_request.request_uri %>
#
# Query params <%= servlet_request.query.inspect %>
class ERBHandler < AbstractServlet
##
# Creates a new ERBHandler on +server+ that will evaluate and serve the
# ERB file +name+
def initialize(server, name)
super(server, name)
@script_filename = name
end
##
# Handles GET requests
def do_GET(req, res)
unless defined?(ERB)
@logger.warn "#{self.class}: ERB not defined."
raise HTTPStatus::Forbidden, "ERBHandler cannot work."
end
begin
data = open(@script_filename){|io| io.read }
res.body = evaluate(ERB.new(data), req, res)
res['content-type'] ||=
HTTPUtils::mime_type(@script_filename, @config[:MimeTypes])
rescue StandardError
raise
rescue Exception => ex
@logger.error(ex)
raise HTTPStatus::InternalServerError, ex.message
end
end
##
# Handles POST requests
alias do_POST do_GET
private
##
# Evaluates +erb+ providing +servlet_request+ and +servlet_response+ as
# local variables.
def evaluate(erb, servlet_request, servlet_response)
Module.new.module_eval{
servlet_request.meta_vars
servlet_request.query
erb.result(binding)
}
end
end
end
end
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