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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/webrick/httpservlet/abstract.rb
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+#
+# httpservlet.rb -- HTTPServlet Module
+#
+# Author: IPR -- Internet Programming with Ruby -- writers
+# Copyright (c) 2000 TAKAHASHI Masayoshi, GOTOU Yuuzou
+# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
+# reserved.
+#
+# $IPR: abstract.rb,v 1.24 2003/07/11 11:16:46 gotoyuzo Exp $
+
+require 'thread'
+
+require 'webrick/htmlutils'
+require 'webrick/httputils'
+require 'webrick/httpstatus'
+
+module WEBrick
+ module HTTPServlet
+ class HTTPServletError < StandardError; end
+
+ ##
+ # 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
+ #
+ # 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'
+ # end
+ # end
+ #
+ # This servlet can be mounted on a server at a given path:
+ #
+ # 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.
+ #
+ # 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
+ # end
+ # end
+ #
+ # This servlet must be provided two arguments at mount time:
+ #
+ # server.mount '/configurable', Configurable, 'red', '2em'
+
+ class AbstractServlet
+
+ ##
+ # Factory for servlet instances that will handle a request from +server+
+ # using +options+ from the mount point. By default a new servlet
+ # instance is created for every call.
+
+ def self.get_instance(server, *options)
+ self.new(server, *options)
+ end
+
+ ##
+ # Initializes a new servlet for +server+ using +options+ which are
+ # stored as-is in +@options+. +@logger+ is also provided.
+
+ def initialize(server, *options)
+ @server = @config = server
+ @logger = @server[:Logger]
+ @options = options
+ end
+
+ ##
+ # Dispatches to a +do_+ method based on +req+ if such a method is
+ # available. (+do_GET+ for a GET request). Raises a MethodNotAllowed
+ # exception if the method is not implemented.
+
+ def service(req, res)
+ method_name = "do_" + req.request_method.gsub(/-/, "_")
+ if respond_to?(method_name)
+ __send__(method_name, req, res)
+ else
+ raise HTTPStatus::MethodNotAllowed,
+ "unsupported method `#{req.request_method}'."
+ end
+ end
+
+ ##
+ # Raises a NotFound exception
+
+ def do_GET(req, res)
+ raise HTTPStatus::NotFound, "not found."
+ end
+
+ ##
+ # Dispatches to do_GET
+
+ def do_HEAD(req, res)
+ do_GET(req, res)
+ end
+
+ ##
+ # Returns the allowed HTTP request methods
+
+ def do_OPTIONS(req, res)
+ m = self.methods.grep(/\Ado_([A-Z]+)\z/) {$1}
+ m.sort!
+ res["allow"] = m.join(",")
+ end
+
+ private
+
+ ##
+ # Redirects to a path ending in /
+
+ def redirect_to_directory_uri(req, res)
+ if req.path[-1] != ?/
+ location = WEBrick::HTTPUtils.escape_path(req.path + "/")
+ if req.query_string && req.query_string.bytesize > 0
+ location << "?" << req.query_string
+ end
+ res.set_redirect(HTTPStatus::MovedPermanently, location)
+ end
+ end
+ end
+
+ end
+end