Class: MiniProxy::Remote

Inherits:
Object
  • Object
show all
Defined in:
lib/miniproxy/remote.rb

Overview

Controls the remote DRb service, which provides a communcation mechanism

Constant Summary collapse

SERVER_DYNAMIC_PORT_RANGE = 
(12345..32768).to_a.freeze
SERVER_START_TIMEOUT = 
10

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.drb_process_alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/miniproxy/remote.rb', line 17

def self.drb_process_alive?
  pid && Process.kill(0, pid) == 1
rescue Errno::ESRCH
  false
end

.pid ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 13

def self.pid
  @pid
end

.server(host = "127.0.0.1") ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 23

def self.server(host = "127.0.0.1")
  @unix_socket_uri ||= begin
    tempfile = Tempfile.new("mini_proxy")
    socket_path = tempfile.path
    tempfile.close!
    "drbunix:///#{socket_path}"
  end

  return @unix_socket_uri if drb_process_alive?

  @pid = fork do
    remote = Remote.new(host)

    Timeout.timeout(SERVER_START_TIMEOUT) do
      begin
        fake_server_port = SERVER_DYNAMIC_PORT_RANGE.sample
        fake_server = FakeSSLServer.new(
          AllowedRequestCheck: remote.method(:allowed_request?),
          Port: fake_server_port,
          MockHandlerCallback: remote.method(:handler),
        )
        Thread.new { fake_server.start }
      rescue Errno::EADDRINUSE
        retry
      end

      begin
        remote.port = ENV["MINI_PROXY_PORT"] || SERVER_DYNAMIC_PORT_RANGE.sample
        proxy = MiniProxy::ProxyServer.new(
          AllowedRequestCheck: remote.method(:allowed_request?),
          Port: remote.port,
          FakeServerPort: fake_server_port,
          MockHandlerCallback: remote.method(:handler),
        )
        Thread.new { proxy.start }
      rescue Errno::EADDRINUSE
        retry
      end
    end

    DRb.start_service(@unix_socket_uri, remote)
    DRb.thread.join

    Process.exit!
  end

  Process.detach(@pid)
  @unix_socket_uri
end

Instance Method Details

#allow_request(method:, url:) ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 93

def allow_request(method:, url:)
  @allowed_requests.push(MiniProxy::Stub::Request.new(method: method, url: url, response: nil))
end

#allowed_request?(req) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/miniproxy/remote.rb', line 97

def allowed_request?(req)
  return true if ["127.0.0.1", "localhost", @host].include?(req.host)

  @allowed_requests.any? { |allowed_request| allowed_request.match?(req) }
end

#clear ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 115

def clear
  @stubs.clear
  @allowed_requests.clear
end

#drain_messages ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 120

def drain_messages
  @messages.slice!(0, @messages.length)
end

#handler(req, res) ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 73

def handler(req, res)
  if (request = @stubs.detect { |mock_request| mock_request.match?(req) })
    response = request.response
    res.status = response.code
    response.headers.each { |key, value| res[key] = value }
    res.body = response.body
  else
    res.status = 200
    res.body = ""
    queue_message "WARN: external request to #{req.host}#{req.path} not mocked"
    queue_message %Q{Stub with: MiniProxy.stub_request(method: "#{req.request_method}", url: "#{req.host}#{req.path}")}
  end
end

#port ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 103

def port
  @port
end

#port=(value) ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 107

def port=(value)
  @port = value
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/miniproxy/remote.rb', line 124

def started?
  current_server = DRb.current_server()
  current_server && current_server.alive?
end

#stop ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 111

def stop
  DRb.stop_service
end

#stub_request(method:, url:, response:) ⇒ Object 



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# File 'lib/miniproxy/remote.rb', line 87

def stub_request(method:, url:, response:)
  response = MiniProxy::Stub::Response.new(headers: response[:headers], body: response[:body])
  request = MiniProxy::Stub::Request.new(method: method, url: url, response: response)
  @stubs.push(request)
end