Class: WEBrick::HTTPServlet::ERBHandler

Inherits:
AbstractServlet show all
Defined in:
lib/webrick/httpservlet/erbhandler.rb

Overview

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 %>

Instance Method Summary collapse

Methods inherited from AbstractServlet

#do_HEAD, #do_OPTIONS, get_instance, #service

Constructor Details

#initialize(server, name) ⇒ ERBHandler

Creates a new ERBHandler on server that will evaluate and serve the ERB file name


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# File 'lib/webrick/httpservlet/erbhandler.rb', line 41

def initialize(server, name)
  super(server, name)
  @script_filename = name
end

Instance Method Details

#do_GET(req, res) ⇒ Object Also known as: do_POST

Handles GET requests


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# File 'lib/webrick/httpservlet/erbhandler.rb', line 49

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 => ex
    raise
  rescue Exception => ex
    @logger.error(ex)
    raise HTTPStatus::InternalServerError, ex.message
  end
end