Method: Rack::Lint::InputWrapper#read

Defined in:
lib/rack/lint.rb

#read(*args) ⇒ Object

  • read behaves like IO#read. Its signature is read([length, [buffer]]).

    If given, length must be a non-negative Integer (>= 0) or nil, and buffer must be a String and may not be nil.

    If length is given and not nil, then this method reads at most length bytes from the input stream.

    If length is not given or nil, then this method reads all data until EOF.

    When EOF is reached, this method returns nil if length is given and not nil, or “” if length is not given or is nil.

    If buffer is given, then the read data will be placed into buffer instead of a newly created String object.



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# File 'lib/rack/lint.rb', line 389

def read(*args)
  assert("rack.input#read called with too many arguments") {
    args.size <= 2
  }
  if args.size >= 1
    assert("rack.input#read called with non-integer and non-nil length") {
      args.first.kind_of?(Integer) || args.first.nil?
    }
    assert("rack.input#read called with a negative length") {
      args.first.nil? || args.first >= 0
    }
  end
  if args.size >= 2
    assert("rack.input#read called with non-String buffer") {
      args[1].kind_of?(String)
    }
  end

  v = @input.read(*args)

  assert("rack.input#read didn't return nil or a String") {
    v.nil? or v.kind_of? String
  }
  if args[0].nil?
    assert("rack.input#read(nil) returned nil on EOF") {
      !v.nil?
    }
  end

  v
end