Module: Async::HTTP::Protocol::HTTP2::Connection

Included in:
Client, Server
Defined in:
lib/async/http/protocol/http2/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#count ⇒ Object (readonly)

Returns the value of attribute count.



116
117
118
 
# File 'lib/async/http/protocol/http2/connection.rb', line 116

def count
  @count
end

#promises ⇒ Object (readonly)

Returns the value of attribute promises.



110
111
112
 
# File 'lib/async/http/protocol/http2/connection.rb', line 110

def promises
  @promises
end

#stream ⇒ Object (readonly)

Returns the value of attribute stream.



54
55
56
 
# File 'lib/async/http/protocol/http2/connection.rb', line 54

def stream
  @stream
end

Instance Method Details

#as_json ⇒ Object 



46
47
48
 
# File 'lib/async/http/protocol/http2/connection.rb', line 46

def as_json(...)
  to_s
end

#close(error = nil) ⇒ Object 



68
69
70
71
72
73
74
75
76
77
 
# File 'lib/async/http/protocol/http2/connection.rb', line 68

def close(error = nil)
  super
  
  # Ensure the reader task is stopped.
  if @reader
    reader = @reader
    @reader = nil
    reader.stop
  end
end

#concurrency ⇒ Object 



118
119
120
 
# File 'lib/async/http/protocol/http2/connection.rb', line 118

def concurrency
  self.maximum_concurrent_streams
end

#http1? ⇒ Boolean

Returns:

  • (Boolean) 


56
57
58
 
# File 'lib/async/http/protocol/http2/connection.rb', line 56

def http1?
  false
end

#http2? ⇒ Boolean

Returns:

  • (Boolean) 


60
61
62
 
# File 'lib/async/http/protocol/http2/connection.rb', line 60

def http2?
  true
end

#initialize ⇒ Object 



28
29
30
31
32
33
34
35
36
 
# File 'lib/async/http/protocol/http2/connection.rb', line 28

def initialize(*)
  super
  
  @count = 0
  @reader = nil
  
  # Writing multiple frames at the same time can cause odd problems if frames are only partially written. So we use a semaphore to ensure frames are written in their entirety.
  @write_frame_guard = Async::Semaphore.new(1)
end

#peer ⇒ Object 



112
113
114
 
# File 'lib/async/http/protocol/http2/connection.rb', line 112

def peer
  @stream.io
end

#read_in_background(parent: Task.current) ⇒ Object

Raises:

  • (RuntimeError) 


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
 
# File 'lib/async/http/protocol/http2/connection.rb', line 79

def read_in_background(parent: Task.current)
  raise RuntimeError, "Connection is closed!" if closed?
  
  parent.async(transient: true) do |task|
    @reader = task
    
    task.annotate("#{version} reading data for #{self.class}.")
    
    # We don't need to defer stop here as this is already a transient task (ignores stop):
    begin
      while !self.closed?
        self.consume_window
        self.read_frame
      end
    rescue Async::Stop, ::IO::TimeoutError, ::Protocol::HTTP2::GoawayError => error
      # Error is raised if a response is actively reading from the
      # connection. The connection is silently closed if GOAWAY is
      # received outside the request/response cycle.
    rescue SocketError, IOError, EOFError, Errno::ECONNRESET, Errno::EPIPE => ignored_error
      # Ignore.
    rescue => error
      # Every other error.
    ensure
      # Don't call #close twice.
      if @reader
        self.close(error)
      end
    end
  end
end

#reusable? ⇒ Boolean

Returns:

  • (Boolean) 


127
128
129
 
# File 'lib/async/http/protocol/http2/connection.rb', line 127

def reusable?
  !self.closed?
end

#start_connection ⇒ Object 



64
65
66
 
# File 'lib/async/http/protocol/http2/connection.rb', line 64

def start_connection
  @reader || read_in_background
end

#synchronize(&block) ⇒ Object 



38
39
40
 
# File 'lib/async/http/protocol/http2/connection.rb', line 38

def synchronize(&block)
  @write_frame_guard.acquire(&block)
end

#to_json ⇒ Object 



50
51
52
 
# File 'lib/async/http/protocol/http2/connection.rb', line 50

def to_json(...)
  as_json.to_json(...)
end

#to_s ⇒ Object 



42
43
44
 
# File 'lib/async/http/protocol/http2/connection.rb', line 42

def to_s
  "\#<#{self.class} #{@count} requests, #{@streams.count} active streams>"
end

#version ⇒ Object 



131
132
133
 
# File 'lib/async/http/protocol/http2/connection.rb', line 131

def version
  VERSION
end

#viable? ⇒ Boolean

Can we use this connection to make requests?

Returns:

  • (Boolean) 


123
124
125
 
# File 'lib/async/http/protocol/http2/connection.rb', line 123

def viable?
  @stream&.readable?
end