1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
#
# 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 Configureable < 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
|
