Class: EventMachine::HttpConnection

Inherits:
Object
  • Object
show all
Includes:
HTTPMethods, Socksify
Defined in:
lib/em-http/http_connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from HTTPMethods

#delete, #get, #head, #options, #patch, #post, #put

Constructor Details

#initialize ⇒ HttpConnection

Returns a new instance of HttpConnection.



42
43
44
45
 
# File 'lib/em-http/http_connection.rb', line 42

def initialize
  @deferred = true
  @middleware = []
end

Instance Attribute Details

#conn ⇒ Object

Returns the value of attribute conn.



40
41
42
 
# File 'lib/em-http/http_connection.rb', line 40

def conn
  @conn
end

#connopts ⇒ Object

Returns the value of attribute connopts.



40
41
42
 
# File 'lib/em-http/http_connection.rb', line 40

def connopts
  @connopts
end

#deferred ⇒ Object (readonly)

Returns the value of attribute deferred.



39
40
41
 
# File 'lib/em-http/http_connection.rb', line 39

def deferred
  @deferred
end

#error ⇒ Object

Returns the value of attribute error.



40
41
42
 
# File 'lib/em-http/http_connection.rb', line 40

def error
  @error
end

#uri ⇒ Object

Returns the value of attribute uri.



40
41
42
 
# File 'lib/em-http/http_connection.rb', line 40

def uri
  @uri
end

Instance Method Details

#activate_connection(client) ⇒ Object 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/em-http/http_connection.rb', line 52

def activate_connection(client)
  begin
    EventMachine.bind_connect(@connopts.bind, @connopts.bind_port, @connopts.host, @connopts.port, HttpStubConnection) do |conn|
      post_init

      @deferred = false
      @conn = conn

      conn.parent = self
      conn.pending_connect_timeout = @connopts.connect_timeout
      conn.comm_inactivity_timeout = @connopts.inactivity_timeout
    end

    finalize_request(client)
  rescue EventMachine::ConnectionError => e
    #
    # Currently, this can only fire on initial connection setup
    # since #connect is a synchronous method. Hence, rescue the exception,
    # and return a failed deferred which fail any client request at next
    # tick.  We fail at next tick to keep a consistent API when the newly
    # created HttpClient is failed. This approach has the advantage to
    # remove a state check of @deferred_status after creating a new
    # HttpRequest. The drawback is that users may setup a callback which we
    # know won't be used.
    #
    # Once there is async-DNS, then we'll iterate over the outstanding
    # client requests and fail them in order.
    #
    # Net outcome: failed connection will invoke the same ConnectionError
    # message on the connection deferred, and on the client deferred.
    #
    EM.next_tick{client.close(e.message)}
  end
end

#connection_completed ⇒ Object 



148
149
150
151
152
153
154
155
156
 
# File 'lib/em-http/http_connection.rb', line 148

def connection_completed
  @peer = @conn.get_peername

  if @connopts.proxy && @connopts.proxy[:type] == :socks5
    socksify(client.req.uri.host, client.req.uri.port, *@connopts.proxy[:authorization]) { start }
  else
    start
  end
end

#finalize_request(c) ⇒ Object 



93
94
95
96
97
98
99
100
101
 
# File 'lib/em-http/http_connection.rb', line 93

def finalize_request(c)
  @conn.callback { c.connection_completed }

  middleware.each do |m|
    c.callback &m.method(:response) if m.respond_to?(:response)
  end

  @clients.push c
end

#middleware ⇒ Object 



103
104
105
 
# File 'lib/em-http/http_connection.rb', line 103

def middleware
  [HttpRequest.middleware, @middleware].flatten
end

#peer ⇒ Object 



135
136
137
 
# File 'lib/em-http/http_connection.rb', line 135

def peer
  Socket.unpack_sockaddr_in(@peer)[1] rescue nil
end

#post_init ⇒ Object 



107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
 
# File 'lib/em-http/http_connection.rb', line 107

def post_init
  @clients = []
  @pending = []

  @p = Http::Parser.new
  @p.header_value_type = :mixed
  @p.on_headers_complete = proc do |h|
    client.parse_response_header(h, @p.http_version, @p.status_code)
    :reset if client.req.no_body?
  end

  @p.on_body = proc do |b|
    client.on_body_data(b)
  end

  @p.on_message_complete = proc do
    if not client.continue?
      c = @clients.shift
      c.state = :finished
      c.on_request_complete
    end
  end
end

#receive_data(data) ⇒ Object 



139
140
141
142
143
144
145
146
 
# File 'lib/em-http/http_connection.rb', line 139

def receive_data(data)
  begin
    @p << data
  rescue HTTP::Parser::Error => e
    c = @clients.shift
    c.nil? ? unbind(e.message) : c.on_error(e.message)
  end
end

#redirect(client) ⇒ Object 



163
164
165
 
# File 'lib/em-http/http_connection.rb', line 163

def redirect(client)
  @pending.push client
end

#send_data(data) ⇒ Object 



198
199
200
 
# File 'lib/em-http/http_connection.rb', line 198

def send_data(data)
  @conn.send_data data
end

#setup_request(method, options = {}, c = nil) ⇒ Object 



87
88
89
90
91
 
# File 'lib/em-http/http_connection.rb', line 87

def setup_request(method, options = {}, c = nil)
  c ||= HttpClient.new(self, HttpClientOptions.new(@uri, options, method))
  @deferred ? activate_connection(c) : finalize_request(c)
  c
end

#start ⇒ Object 



158
159
160
161
 
# File 'lib/em-http/http_connection.rb', line 158

def start
  @conn.start_tls(@connopts.tls) if client && client.req.ssl?
  @conn.succeed
end

#stream_file_data(filename, args = {}) ⇒ Object 



202
203
204
 
# File 'lib/em-http/http_connection.rb', line 202

def stream_file_data(filename, args = {})
  @conn.stream_file_data filename, args
end

#unbind(reason) ⇒ Object Also known as: close 



167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
 
# File 'lib/em-http/http_connection.rb', line 167

def unbind(reason)
  @clients.map { |c| c.unbind(reason) }

  if r = @pending.shift
    @clients.push r

    r.reset!
    @p.reset!

    begin
      @conn.set_deferred_status :unknown

      if @connopts.proxy
        @conn.reconnect(@connopts.host, @connopts.port)
      else
        @conn.reconnect(r.req.host, r.req.port)
      end

      @conn.pending_connect_timeout = @connopts.connect_timeout
      @conn.comm_inactivity_timeout = @connopts.inactivity_timeout
      @conn.callback { r.connection_completed }
    rescue EventMachine::ConnectionError => e
      @clients.pop.close(e.message)
    end
  else
    @deferred = true
    @conn.close_connection
  end
end

#use(klass, *args, &block) ⇒ Object 



131
132
133
 
# File 'lib/em-http/http_connection.rb', line 131

def use(klass, *args, &block)
  @middleware << klass.new(*args, &block)
end