class WEBrick::HTTPServlet::ERBHandler

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 %>

Public Class Methods

new(server, name) click to toggle source

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

Calls superclass method WEBrick::HTTPServlet::AbstractServlet::new

# File webrick/httpservlet/erbhandler.rb, line 42
def initialize(server, name)
  super(server, name)
  @script_filename = name
end

Public Instance Methods

do_GET(req, res) click to toggle source

Handles GET requests

# File webrick/httpservlet/erbhandler.rb, line 50
def do_GET(req, res)
  unless defined?(ERB)
    @logger.warn "#{self.class}: ERB not defined."
    raise HTTPStatus::Forbidden, "ERBHandler cannot work."
  end
  begin
    data = File.open(@script_filename, &: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

Also aliased as: do_POST

do_POST(req, res)

Handles POST requests

Alias for: do_GET

Private Instance Methods

evaluate(erb, servlet_request, servlet_response) click to toggle source

Evaluates erb providing servlet_request and servlet_response as local variables.

# File webrick/httpservlet/erbhandler.rb, line 79
def evaluate(erb, servlet_request, servlet_response)
  Module.new.module_eval{
    servlet_request.meta_vars
    servlet_request.query
    erb.result(binding)
  }
end