Class: Thin::Request

Inherits:
Object
  • Object
show all
Defined in:
lib/thin/request.rb

Overview

A request sent by the client to the server.

Constant Summary collapse

MAX_BODY =

Maximum request body size before it is moved out of memory and into a tempfile for reading.

1024 * (80 + 32)
BODY_TMPFILE = 
'thin-body'.freeze
MAX_HEADER = 
1024 * (80 + 32)
INITIAL_BODY = 
''
SERVER_SOFTWARE =

Freeze some HTTP header names & values

'SERVER_SOFTWARE'.freeze
SERVER_NAME = 
'SERVER_NAME'.freeze
LOCALHOST = 
'localhost'.freeze
HTTP_VERSION = 
'HTTP_VERSION'.freeze
HTTP_1_0 = 
'HTTP/1.0'.freeze
REMOTE_ADDR = 
'REMOTE_ADDR'.freeze
CONTENT_LENGTH = 
'CONTENT_LENGTH'.freeze
CONNECTION = 
'HTTP_CONNECTION'.freeze
KEEP_ALIVE_REGEXP = 
/\bkeep-alive\b/i.freeze
CLOSE_REGEXP = 
/\bclose\b/i.freeze
RACK_INPUT =

Freeze some Rack header names

'rack.input'.freeze
RACK_VERSION = 
'rack.version'.freeze
RACK_ERRORS = 
'rack.errors'.freeze
RACK_MULTITHREAD = 
'rack.multithread'.freeze
RACK_MULTIPROCESS = 
'rack.multiprocess'.freeze
RACK_RUN_ONCE = 
'rack.run_once'.freeze
ASYNC_CALLBACK = 
'async.callback'.freeze
ASYNC_CLOSE = 
'async.close'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Request

Returns a new instance of Request.



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
 
# File 'lib/thin/request.rb', line 52

def initialize
  @parser   = Thin::HttpParser.new
  @data     = ''
  @nparsed  = 0
  @body     = StringIO.new(INITIAL_BODY.dup)
  @env      = {
    SERVER_SOFTWARE   => SERVER,
    SERVER_NAME       => LOCALHOST,

    # Rack stuff
    RACK_INPUT        => @body,

    RACK_VERSION      => VERSION::RACK,
    RACK_ERRORS       => STDERR,

    RACK_MULTITHREAD  => false,
    RACK_MULTIPROCESS => false,
    RACK_RUN_ONCE     => false
  }
end

Instance Attribute Details

#body ⇒ Object (readonly)

Request body



50
51
52
 
# File 'lib/thin/request.rb', line 50

def body
  @body
end

#data ⇒ Object (readonly)

Unparsed data of the request



47
48
49
 
# File 'lib/thin/request.rb', line 47

def data
  @data
end

#env ⇒ Object (readonly)

CGI-like request environment variables



44
45
46
 
# File 'lib/thin/request.rb', line 44

def env
  @env
end

Instance Method Details

#async_callback=(callback) ⇒ Object 



133
134
135
136
 
# File 'lib/thin/request.rb', line 133

def async_callback=(callback)
  @env[ASYNC_CALLBACK] = callback
  @env[ASYNC_CLOSE] = EventMachine::DefaultDeferrable.new
end

#async_close ⇒ Object 



138
139
140
 
# File 'lib/thin/request.rb', line 138

def async_close
  @async_close ||= @env[ASYNC_CLOSE]
end

#close ⇒ Object

Close any resource used by the request



143
144
145
 
# File 'lib/thin/request.rb', line 143

def close
  @body.delete if @body.class == Tempfile
end

#content_length ⇒ Object

Expected size of the body



105
106
107
 
# File 'lib/thin/request.rb', line 105

def content_length
  @env[CONTENT_LENGTH].to_i
end

#finished? ⇒ Boolean

true if headers and body are finished parsing

Returns:

  • (Boolean) 


100
101
102
 
# File 'lib/thin/request.rb', line 100

def finished?
  @parser.finished? && @body.size >= content_length
end

#parse(data) ⇒ Object

Parse a chunk of data into the request environment Raises a InvalidRequest if invalid. Returns true if the parsing is complete.



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
 
# File 'lib/thin/request.rb', line 76

def parse(data)
  if @parser.finished?  # Header finished, can only be some more body
    body << data
  else                  # Parse more header using the super parser
    @data << data
    raise InvalidRequest, 'Header longer than allowed' if @data.size > MAX_HEADER

    @nparsed = @parser.execute(@env, @data, @nparsed)

    # Transfert to a tempfile if body is very big
    move_body_to_tempfile if @parser.finished? && content_length > MAX_BODY
  end


  if finished?   # Check if header and body are complete
    @data = nil
    @body.rewind
    true         # Request is fully parsed
  else
    false        # Not finished, need more data
  end
end

#persistent? ⇒ Boolean

Returns true if the client expect the connection to be persistent.

Returns:

  • (Boolean) 


110
111
112
113
114
115
116
117
118
119
120
121
122
123
 
# File 'lib/thin/request.rb', line 110

def persistent?
  # Clients and servers SHOULD NOT assume that a persistent connection
  # is maintained for HTTP versions less than 1.1 unless it is explicitly
  # signaled. (http://www.w3.org/Protocols/rfc2616/rfc2616-sec8.html)
  if @env[HTTP_VERSION] == HTTP_1_0
    @env[CONNECTION] =~ KEEP_ALIVE_REGEXP

  # HTTP/1.1 client intends to maintain a persistent connection unless
  # a Connection header including the connection-token "close" was sent
  # in the request
  else
    @env[CONNECTION].nil? || @env[CONNECTION] !~ CLOSE_REGEXP
  end
end

#remote_address=(address) ⇒ Object 



125
126
127
 
# File 'lib/thin/request.rb', line 125

def remote_address=(address)
  @env[REMOTE_ADDR] = address
end

#threaded=(value) ⇒ Object 



129
130
131
 
# File 'lib/thin/request.rb', line 129

def threaded=(value)
  @env[RACK_MULTITHREAD] = value
end