Module: AeNetworkConnectionException

Defined in:
lib/ae_network_connection_exception.rb,
lib/ae_network_connection_exception/version.rb

Defined Under Namespace

Classes: ConnectionNotEstablished

Constant Summary collapse

OTHER_EXCEPTIONS = 
[]
VERSION = 
"1.5.0"

Class Method Summary collapse

Class Method Details

.exception_signatures ⇒ Object

An array of examples for all the exceptions that we will catch



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# File 'lib/ae_network_connection_exception.rb', line 39

def exception_signatures
  [
    SocketError.new('getaddrinfo: Name or service not known'),
    Errno::ECONNREFUSED.new('Connection refused - connect(2) for "example.com" port 443'),
    Errno::ETIMEDOUT.new('Connection timed out - connect(2) for "example.com" port 443'),
    Net::OpenTimeout.new('message'),
    Errno::ECONNRESET.new('Connection reset by peer - SSL_connect', Errno::ECONNREFUSED.new('Connection refused - connect(2) for "example.com" port 443')),
    Errno::EHOSTUNREACH.new('No route to host - connect(2) for "example.com" port 443'),
    Errno::ENETUNREACH.new('Network is unreachable - connect(2) for "example.com" port 443')
  ]
end

.try ⇒ Object 



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# File 'lib/ae_network_connection_exception.rb', line 16

def try
  yield
rescue SocketError, Net::OpenTimeout, *OTHER_EXCEPTIONS => e
  # SocketError happens when we fail to connect to a socket. Common problems here are DNS resolution (i.e. getaddrinfo)
  # Net::OpenTimeout happens when we are unable to establish an HTTP connection before the open_timeout

  raise ConnectionNotEstablished
rescue Errno::ETIMEDOUT, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ENETUNREACH => e
  # Errno::ECONNREFUSED happens when we can not connect to the port
  # Errno::ETIMEDOUT happens when we timeout durring the tcp handshake
  # It is important to note, Errno::ETIMEDOUT can also happen after we have established a connection and are waiting for a response.
  # Because of this, we also check that the sys call that was made is connect(2).
  # Errno::* Exceptions have the following error message format
  # "#{Message string} - #{syscall} for "#{host}" port #{port}"

  raise_if_exception_message_matches(e, /connect\(2\)/)
rescue Errno::ECONNRESET => e
  # Errno::ECONNRESET happens when the connection is reset. This can happen during ssl negotiation

  raise_if_exception_message_matches(e, /SSL_connect/)
end