Signals

[rizplate]

I am looking at the code and see all the signals being re-mapped and hence Scrapy ExecutionEngine and Downloader being subclassed.

1- What is the need of these custom signals and re-implmenting signals?
2- There seems to be the use to web sockets for client communication, why isn't http api sufficient?
3- Does this thing obey regular scrapy middleware i.e. cookies, robots.txt etc middleware?
4- Does this uses splash as browser?
5- Are the auto login or FormRequest works with this?