GetAnyAliveProxy takes proxies as input and returns the first alive proxy or returns error if all of them not alive.

GetProxyURL returns a Proxy URL after validating if given proxy url is valid.

IsBurp checks if the target proxy URL is burp suite.

ValidateOne returns the first valid proxy from a list of proxies by setting up a test connection with scanme.sh.

ProxyProbeConcurrency (default 8).