@startuml
hide empty description
[*] -right-> appendHeaderCallback
appendHeaderCallback -right-> writeCallback : Success
appendHeaderCallback -down-> errorCallback : Application cancels the request
writeCallback -down-> readReadyCallback : Success in network send
writeCallback -down-> errorCallback : Failure in network send \nor application cancels the request
readReadyCallback -down-> responseCompleteCallback : Success in everything and a \npersistent request
readReadyCallback -left-> errorCallback : Failure in network receive, response parsing, or the application cancels the request
readReadyCallback -down-> connectionCloseCallback : Success in everything and a \nnon-persistent request
errorCallback -down-> connectionCloseCallback : Network error or \nresponse parsing error
errorCallback -down-> responseCompleteCallback : Application cancels the requset
connectionCloseCallback -down-> responseCompleteCallback : Always
responseCompleteCallback -right-> [*]
@enduml