Class: WEBrick::HTTPServer

Inherits:
GenericServer show all
Defined in:
lib/webrick/httpserver.rb

Overview

An HTTP Server

Direct Known Subclasses

HTTPProxyServer

Defined Under Namespace

Classes: MountTable

Instance Attribute Summary

Attributes inherited from GenericServer

#config, #listeners, #logger, #status, #tokens

Instance Method Summary collapse

Methods inherited from GenericServer

#[], #listen, #setup_ssl_context, #shutdown, #ssl_context, #start, #stop

Constructor Details

#initialize(config = {}, default = Config::HTTP) ⇒ HTTPServer

Creates a new HTTP server according to config

An HTTP server uses the following attributes:

:AccessLog

An array of access logs. See WEBrick::AccessLog

:BindAddress

Local address for the server to bind to

:DocumentRoot

Root path to serve files from

:DocumentRootOptions

Options for the default HTTPServlet::FileHandler

:HTTPVersion

The HTTP version of this server

:Port

Port to listen on

:RequestCallback

Called with a request and response before each request is serviced.

:RequestTimeout

Maximum time to wait between requests

:ServerAlias

Array of alternate names for this server for virtual hosting

:ServerName

Name for this server for virtual hosting



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
# File 'lib/webrick/httpserver.rb', line 44

def initialize(config={}, default=Config::HTTP)
  super(config, default)
  @http_version = HTTPVersion::convert(@config[:HTTPVersion])

  @mount_tab = MountTable.new
  if @config[:DocumentRoot]
    mount("/", HTTPServlet::FileHandler, @config[:DocumentRoot],
          @config[:DocumentRootOptions])
  end

  unless @config[:AccessLog]
    @config[:AccessLog] = [
      [ $stderr, AccessLog::COMMON_LOG_FORMAT ],
      [ $stderr, AccessLog::REFERER_LOG_FORMAT ]
    ]
  end

  @virtual_hosts = Array.new
end

Instance Method Details

#access_log(config, req, res) ⇒ Object

Logs req and res in the access logs. config is used for the server name.



218
219
220
221
222
223
# File 'lib/webrick/httpserver.rb', line 218

def access_log(config, req, res)
  param = AccessLog::setup_params(config, req, res)
  @config[:AccessLog].each{|logger, fmt|
    logger << AccessLog::format(fmt+"\n", param)
  }
end

#do_OPTIONS(req, res) ⇒ Object

The default OPTIONS request handler says GET, HEAD, POST and OPTIONS requests are allowed.



145
146
147
# File 'lib/webrick/httpserver.rb', line 145

def do_OPTIONS(req, res)
  res["allow"] = "GET,HEAD,POST,OPTIONS"
end

#lookup_server(req) ⇒ Object

Finds the appropriate virtual host to handle req



205
206
207
208
209
210
211
212
# File 'lib/webrick/httpserver.rb', line 205

def lookup_server(req)
  @virtual_hosts.find{|s|
    (s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
    (s[:Port].nil?        || req.port == s[:Port])           &&
    ((s[:ServerName].nil?  || req.host == s[:ServerName]) ||
     (!s[:ServerAlias].nil? && s[:ServerAlias].find{|h| h === req.host}))
  }
end

#mount(dir, servlet, *options) ⇒ Object

Mounts servlet on dir passing options to the servlet at creation time



153
154
155
156
# File 'lib/webrick/httpserver.rb', line 153

def mount(dir, servlet, *options)
  @logger.debug(sprintf("%s is mounted on %s.", servlet.inspect, dir))
  @mount_tab[dir] = [ servlet, options ]
end

#mount_proc(dir, proc = nil, &block) ⇒ Object

Mounts proc or block on dir and calls it with a WEBrick::HTTPRequest and WEBrick::HTTPResponse

Raises:



162
163
164
165
166
# File 'lib/webrick/httpserver.rb', line 162

def mount_proc(dir, proc=nil, &block)
  proc ||= block
  raise HTTPServerError, "must pass a proc or block" unless proc
  mount(dir, HTTPServlet::ProcHandler.new(proc))
end

#run(sock) ⇒ Object

Processes requests on sock



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
# File 'lib/webrick/httpserver.rb', line 67

def run(sock)
  while true
    res = HTTPResponse.new(@config)
    req = HTTPRequest.new(@config)
    server = self
    begin
      timeout = @config[:RequestTimeout]
      while timeout > 0
        break if IO.select([sock], nil, nil, 0.5)
        break if @status != :Running
        timeout -= 0.5
      end
      raise HTTPStatus::EOFError if timeout <= 0 || @status != :Running
      raise HTTPStatus::EOFError if sock.eof?
      req.parse(sock)
      res.request_method = req.request_method
      res.request_uri = req.request_uri
      res.request_http_version = req.http_version
      res.keep_alive = req.keep_alive?
      server = lookup_server(req) || self
      if callback = server[:RequestCallback]
        callback.call(req, res)
      elsif callback = server[:RequestHandler]
        msg = ":RequestHandler is deprecated, please use :RequestCallback"
        @logger.warn(msg)
        callback.call(req, res)
      end
      server.service(req, res)
    rescue HTTPStatus::EOFError, HTTPStatus::RequestTimeout => ex
      res.set_error(ex)
    rescue HTTPStatus::Error => ex
      @logger.error(ex.message)
      res.set_error(ex)
    rescue HTTPStatus::Status => ex
      res.status = ex.code
    rescue StandardError => ex
      @logger.error(ex)
      res.set_error(ex, true)
    ensure
      if req.request_line
        if req.keep_alive? && res.keep_alive?
          req.fixup()
        end
        res.send_response(sock)
        server.access_log(@config, req, res)
      end
    end
    break if @http_version < "1.1"
    break unless req.keep_alive?
    break unless res.keep_alive?
  end
end

#search_servlet(path) ⇒ Object

Finds a servlet for path



180
181
182
183
184
185
186
# File 'lib/webrick/httpserver.rb', line 180

def search_servlet(path)
  script_name, path_info = @mount_tab.scan(path)
  servlet, options = @mount_tab[script_name]
  if servlet
    [ servlet, options, script_name, path_info ]
  end
end

#service(req, res) ⇒ Object

Services req and fills in res

Raises:

  • (HTTPStatus::NotFound)


123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
# File 'lib/webrick/httpserver.rb', line 123

def service(req, res)
  if req.unparsed_uri == "*"
    if req.request_method == "OPTIONS"
      do_OPTIONS(req, res)
      raise HTTPStatus::OK
    end
    raise HTTPStatus::NotFound, "`#{req.unparsed_uri}' not found."
  end

  servlet, options, script_name, path_info = search_servlet(req.path)
  raise HTTPStatus::NotFound, "`#{req.path}' not found." unless servlet
  req.script_name = script_name
  req.path_info = path_info
  si = servlet.get_instance(self, *options)
  @logger.debug(format("%s is invoked.", si.class.name))
  si.service(req, res)
end

#unmount(dir) ⇒ Object Also known as: umount

Unmounts dir



171
172
173
174
# File 'lib/webrick/httpserver.rb', line 171

def unmount(dir)
  @logger.debug(sprintf("unmount %s.", dir))
  @mount_tab.delete(dir)
end

#virtual_host(server) ⇒ Object

Adds server as a virtual host.



191
192
193
194
195
196
197
198
199
200
# File 'lib/webrick/httpserver.rb', line 191

def virtual_host(server)
  @virtual_hosts << server
  @virtual_hosts = @virtual_hosts.sort_by{|s|
    num = 0
    num -= 4 if s[:BindAddress]
    num -= 2 if s[:Port]
    num -= 1 if s[:ServerName]
    num
  }
end