Signals #

By using signals, it’s possible to capture crawler events and perform certain actions.

• CrawlerChanged: Indicates the status changed of the crawler. You can register it using RegisterCrawlerChanged(FnCrawlerChanged).
• SpiderChanged: Indicates the status changed of the spider.You can register it using RegisterSpiderChanged(FnSpiderChanged).
• JobChanged: Indicates the status changed of the job. You can register it using RegisterJobChanged(FnJobChanged).
• TaskChanged: Indicates the status changed of the task. You can register it using RegisterTaskChanged(FnTaskChanged).
• RequestChanged: Indicates the status changed of the request. You can register it using RegisterRequestChanged(FnRequestChanged).
• ItemChanged: Indicates the status changed of the item. You can register it using RegisterItemChanged(FnItemChanged).