Class: Iodine::Http::Http2::HPACK::IndexTable

Inherits:
Object
  • Object
show all
Defined in:
lib/iodine/http/hpack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ IndexTable

Returns a new instance of IndexTable.



10
11
12
13
14
 
# File 'lib/iodine/http/hpack.rb', line 10

def initialize
  @list = []
  @size = 4_096 # initial defaul size by standard
  @actual_size = 0
end

Instance Attribute Details

#max_size ⇒ Object

Returns the value of attribute max_size.



9
10
11
 
# File 'lib/iodine/http/hpack.rb', line 9

def max_size
  @max_size
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



8
9
10
 
# File 'lib/iodine/http/hpack.rb', line 8

def size
  @size
end

Instance Method Details

#[](index) ⇒ Object Also known as: get_index 



15
16
17
18
19
20
 
# File 'lib/iodine/http/hpack.rb', line 15

def [] index
  raise "HPACK Error - invalid header index: 0" if index == 0
  return STATIC_LIST[index] if index < STATIC_LENGTH
  raise "HPACK Error - invalid header index: #{index}" if index >= ( @list.count + STATIC_LENGTH )
  @list[index - STATIC_LENGTH]
end

#find(*field) ⇒ Object 



31
32
33
34
35
36
 
# File 'lib/iodine/http/hpack.rb', line 31

def find *field
  index = STATIC_LIST.index(field)
  return index if index
  index = @list.index(field)
  index ? (index + STATIC_LENGTH) : nil
end

#find_name(name) ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/iodine/http/hpack.rb', line 37

def find_name name
  index = 1
  while STATIC_LIST[index]
    return index if STATIC_LIST[index][0] == name
    index += 1
  end
  index = 0
  while @list[index]
    return index+STATIC_LENGTH if @list[index][0] == name
    index += 1
  end
  nil
end

#get_name(index) ⇒ Object 



22
23
24
 
# File 'lib/iodine/http/hpack.rb', line 22

def get_name index
  get_index(index)[0]
end

#insert(*field) ⇒ Object 



25
26
27
28
29
30
 
# File 'lib/iodine/http/hpack.rb', line 25

def insert *field
  @list.unshift field
  field.each {|f| @actual_size += f.to_s.bytesize}; @actual_size += 32
  resize
  field
end

#resize(value = nil) ⇒ Object 



50
51
52
53
54
55
56
57
 
# File 'lib/iodine/http/hpack.rb', line 50

def resize value = nil
  @size = value if value && value <= 4_096
  while (@actual_size > @size) && @list.any?
    @list.pop.each {|i| @actual_size -= i.to_s.bytesize}
    @actual_size -= 32
  end
  self
end