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 = 
String.new
SERVER_SOFTWARE =

Freeze some HTTP header names & values

'SERVER_SOFTWARE'.freeze
SERVER_NAME = 
'SERVER_NAME'.freeze
REQUEST_METHOD = 
'REQUEST_METHOD'.freeze
LOCALHOST = 
'localhost'.freeze
REQUEST_HTTP_VERSION = 
'thin.request_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
HEAD = 
'HEAD'.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.



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# File 'lib/thin/request.rb', line 54

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

    # Rack stuff
    RACK_INPUT        => @body,
    RACK_ERRORS       => STDERR,
  })
end

Instance Attribute Details

#body ⇒ Object (readonly)

Request body



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

def body
  @body
end

#data ⇒ Object (readonly)

Unparsed data of the request



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

def data
  @data
end

#env ⇒ Object (readonly)

CGI-like request environment variables



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

def env
  @env
end

Instance Method Details

#async_callback=(callback) ⇒ Object 



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

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

#async_close ⇒ Object 



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

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

#close ⇒ Object

Close any resource used by the request



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

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

#content_length ⇒ Object

Expected size of the body



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# File 'lib/thin/request.rb', line 103

def content_length
  @env[CONTENT_LENGTH].to_i
end

#finished? ⇒ Boolean

true if headers and body are finished parsing

Returns:

  • (Boolean) 


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# File 'lib/thin/request.rb', line 98

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

#head? ⇒ Boolean

Returns:

  • (Boolean) 


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

def head?
  @env[REQUEST_METHOD] == HEAD
end

#parse(data) ⇒ Object

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



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# File 'lib/thin/request.rb', line 72

def parse(data)
  if data.size > 0 && finished? # headers and body already fully satisfied. more data is erroneous.
    raise InvalidRequest, 'Content longer than specified'
  elsif @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)

    # Transfer 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 expects the connection to be persistent.

Returns:

  • (Boolean) 


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# File 'lib/thin/request.rb', line 108

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[REQUEST_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 



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# File 'lib/thin/request.rb', line 123

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

#threaded=(value) ⇒ Object 



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

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