Type:
Class
AbstractServlet allows HTTP server modules to be reused across multiple servers and allows encapsulation of functionality.
By default a servlet will respond to GET, HEAD (through an alias to GET) and OPTIONS requests.
By default a new servlet is initialized for every request. A servlet instance can be reused by overriding ::get_instance in the AbstractServlet subclass.
A Simple Servlet
1 2 3 4 5 6 7 8 9 10 11 12 13 | class Simple < WEBrick::HTTPServlet::AbstractServlet def do_GET request, response status, content_type, body = do_stuff_with request response.status = status response['Content-Type'] = content_type response.body = body end def do_stuff_with request return 200, 'text/plain', 'you got a page' endend |
This servlet can be mounted on a server at a given path:
1 | server.mount '/simple', Simple |
Servlet Configuration
Servlets can be configured via initialize. The first argument is the HTTP server the servlet is being initialized for.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | class Configurable < Simple def initialize server, color, size super server @color = color @size = size end def do_stuff_with request content = "<p " \ %q{style="color: #{@color}; font-size: #{@size}"} \ ">Hello, World!" return 200, "text/html", content endend |
This servlet must be provided two arguments at mount time:
1 | server.mount '/configurable', Configurable, 'red', '2em' |